A Lulin-style hair before hair cut
Mar 5th
Revised on 2009 March 12.
With the help from Sisi Chen, I finally managed to make a "Lulin-style" hair before I cut it off -- see above. I wish to thank Sisi for her patient and help. Sisi is also a fan of astronomy, and she had been well possible to study astronomy in Nanking University -- but for some coincidence she came to Sun Yat-sen University and study meteorology as me.
Today I went to the barber's and cut my hair very short. Let's see how Lulin will response this time! Before updates on Lulin's appearance, let's see some nice photos from Lulin and others.
This very nice photo is taken by Michael Pagitz with a GRAS (Global Rent-a-scope) telescope, used with permission. Michael is a long term user of 7Timer! service (http://7timer.y234.cn) and I'm really happy to see his nice Lulin image!
And finally I took some Lulin images with the 0.41-m reflector (the one which found the comet) during the course of Lulin Sky Survey, and confirmed that I have to the right to publish them on my blog this time (but please don't re-post these images on your sites). The animation above show a major burst during late Feb. 25, the duration of this animation is about 1-hour (around 15-16h UT).
The one above is taken on Feb. 28 with LRGB combined, the total exposure time is about 170 minutes. There are other images below you may have a look. According to the latest reports, the comet is still visible to naked-eye observers at magnitude of about 5.5.
Lulin astrology
Mar 1st
It has been cloudy since Feb. 26, meanwhile I spent nearly 12 hours each day on bed to make myself recover faster from bad cold, I'm feeling much better now. Over the next weekend I'll fly to Beijing and Tianjin, meeting friends, and giving a talk about Comet Lulin and the total solar eclipse at Peking University, I'll also attend the Vienna Philharmonic's performance at National Center for the Performing Arts on March 9 -- actually, this is the main reason I go to Beijing!
When being unable to see Lulin, a message from Liaoshan Shi draw my attention to some interesting but somehow strange remarks of comets (http://www.chinaufo.com/jplw/jplw37.htm). In 1997, some one had shot Comet Hale-Bopp and claimed he had used Qigong mechanism to "confirmed" there are poinsonous microzymes on Comet Hale-Bopp. "Saccharides are composed by C, H and O molecules, and astronomers had proved that there are C, H and O elements on the comet, so saccharides can be formed under the force of solar wind and produce microzymes." The author wrote, "On March 20, 1997, at 22:33, after taking photograph of Comet Hale-Bopp with my camera, I used Qigong to study the nuclie, I felt the nuclie like a heater and there are some molecules moving toward the tail. After that, the materials of the tail connected with my body, I felt bad and felt the energy of Comet Hale-Bopp is dark green and poisonous. After connected with the tail, my hands turned green, in order to prevent further poisoned, I 'repeated' the virus back to Comet Hale-Bopp many times, however I still got urinary tract infection..."
I have mentioned Liaoshan many times during my Lulin monitoring campaign here and I think you need an introduction of her -- Liaoshan is two years younger than me and she is now studying physics and optics in Sun Yat-sen University (the same university as me). She has a long-term interest on asteroids and comets, as well as deep sky observing and drawing, and she is the credit discoverer to some NEAT asteroids (possibly the youngest female discoverer over the world), and has help me do reductions for some Lulin data as well. She also has a very good sense of humor!
I could not suppress my inclination to laugh anymore as the author went on, "base on my Qigong experiment, I confirmed that there are 'bacteria virus' on Comet Hale-Bopp indeed. At least, I think this is the truth I can get."
I'm not going to blame the author for such an interesting point of view since it gives me too much laughers. I don't recommend to laugh at different or ignorant views -- we should discuss, angue, or teach when the time comes. But sometimes, we have no choice but laugh. I agree that there are many secrets in cosmos, but I believe we should study them by observation and deduction, and these are what scientific research based on.
The astrologers also noted Lulin's visit to the inner solar system, but from an angle much better than the author above. Well, I'm not a fan of astrology. It may be good for entertainment ("foolish daughter" of astronomy, Kepler remarked), and actually a few serious works have been done in history, but I have seen too much ignorant talks and discussion from the so-called astrological fans about universe and stars. So after reading the funny article about Comet Hale-Bopp's virus, I decided to try to look for some fresh funny stuff, so I began Googling astrological news about Comet Lulin. I did not receive a bigger laugher but a few discussions appeared to be serious, it's not bad to learn the comet from another angle!
An Italian astrologer named Margherita Fiorello investigated the visit of Lulin seriously and wrote what her found on her blog (http://heavenastrolabe.wordpress.com/2009/02/09/about-the-comet-lulin/), after investigating the syzygy chart of the date I discovered it, she concluded the comet will "produce many damages" since it moves "against the order", but the areas under influence are likely to be Eastern Europe and Central Asia. The sentences and phrases she used remind me the astrological teacher appeared in J. K. Rowling's book "Harry Potter". Meanwhile, another astrologer named Anton Grigoryev investigated from ancient book full of Greek-alike characters without a clear conclution (http://www.antonblog.net/astrology/mundane-astrology/comet-lulin/).
The two astrologers seems to know the sky quite well, at least as good as an experienced amatuer astronomer. Other astrology fans try to find "freak" events to support astrological theories -- one noted a "Gamma Ray burst in Virgo", well this seems to be quite profesional but strikes nothing; while another noted that at the day before Comet Lulin's closest approach to the Earth, the US stock market hit its lowest point since 1997! However I later learnt the Dow Jones Index coutinuously went down after Lulin's approach... Lulin is not that bad, right?
A even more interesting viewpoint is given by Aluna Joy Yaxk'in says we have been "experiencing a lot of interesting energy shifts" since Lulin is swinging pass the Earth. "Physically we are having stomach aches, nausea, and to sensitive ones, even a sense of your entire body being hit by a fast-moving truck.If you are feeling these physical symptoms, it means your spiritual, emotional and physical bodies are working to realign to the new energies."
The author continues, "This comet will be passing close to the Earth just as we enter portal and core days in the Maya calendar... according to Maya Cosmology, March 20, 2009, is potentially the most powerful and transforming event that we will have ever experienced in recorded history."
"Be aware," after reading this article, Liaoshan remind me, "it's well possible that your bad cold being an excellent example for astrologers that comets are indeed bringing disasters to our human beings!" "Well, don't worry that much," I replied, "at least we now know that greenish Lulin did not make those who had taken photo of her get urinary tract infection -- it's safe!"
By the way, I plan to have my hair cut before my departure to Beijing -- let's see if Lulin will cut her tail as well! ("You should have done that when Lulin cut her tail around Feb. 7!" Liaoshan remarks)
Comet brings sickness? Maybe, but not Lulin
Feb 26th
After the Lulin observing compaign on Feb. 24/25, my tireness of long travel, preparation of the new term operning and many other things stacked and made my bad cold intensified into the worst bad cold I have ever experienced in past ten years. I feel sleepy everywhere, unable to recall something quickly, even unaware of what I'm doing. I think I need a good rest this weekend. If the recovery is not significant, I may need to go to the doctor's.
Although I was feeling very bad last night, I still carried my binocular and tripod with the help from Sisi Chen to the top of laboratory's building for Lulin. The sky was good for a downtown-based field -- with LM around 2.0-2.5, cirrus on. I spent a little bit longer to find the comet -- about a minute I think. Cirrus occasionary went over the region and we had to pause. Under heavy light pollution, I estimated the brightness of Lulin to be about 5.0 mag. with a coma at about 20', the tail was faint in the background, I measured several times and confirmed it's about 1 deg long. Although not formally trained before, Sisi recorgnize the comet with ease, and she could detected the tail too. Very sharp eyes!
I should stay there longer for the view, but I had to go to bed, so I forced myself to go back to dormitory at around 22:50. Comet may indeed bring bad fortune like sickness, but Lulin shouldn't -- the cause of the bad cold maybe, like 85P/Boethin? Its period is 11.5 years so it fits the fact for this 10-year worst bad cold Thankfully the cloud comes up tonight so I can sleep early. The moonson season is coming, but in early March I will pay a short visit to Beijing and Tianjin, so there are still chances to see Lulin!
Feeling lucky when Lulin shining above
Feb 25th
I departed with a few friends from Guangzhou for Gaocun Village at around 22:30, Heng Zhou drove the car. It's our Guangdong Southern Cross Star Association which held the party, and there is only one topic -- Comet Lulin. It was prefectably clear all the way down, but according to the messages from those friends who arrived earlier, "it's overcast!" We laughed and refused to believe, as the sky was really "rarely-seen prefect".
At around 0:15 we arrived Gaocun and had to believe what was told earlier -- it's indeed overcast. What made us feel more frustrated is that we were under a small patch of heavy cloud, the patch went just right over the village. After a few minutes of discussion, we made a casual decision that a new temperory site must be found. Quanzhi Shen and several others would stay at Gaocun since their equipment could not move easily, while Heng, I, Jianji Li and some others (2 cars in total) would drive east to seek for clear sky. We made a U turn and drove about 10 kilometers to reach the clear sky we had found on the way to Gaocun, but quite unfortunately, when we found a flat area near Xiaodong Village after about half an hour's search and were just about to unpack our equipments, the clouds came and blocked our view. Disappointed and frustrated, we decided to go back Gaocun, set up our tents and sleep. At around 1 a.m. we arrived Gaocun and began to set up our tent. "Lulin is shy," I explained to others, as I had predicted the sky to be "partly clear" that night but it seems not, "she is unwilling to turn up when there are so many guys pointing their telescopes to her."
We worked 20 minutes to set the big tent up, but just at the time we finished all the things and plan to go to sleep, Heng's mobile phone rang, it came from another group which had also went out to seek clear sky, "You said that the sky is clear there?" Heng shouted, and we were all stop talking to hear what he went on, "drove... west? Okay, okay, we're coming." After only five minutes, Heng was driving at about 150kph at the tiny path heading west and we were on his car (Quanzhi Shen and his fellows stayed still at Gaocun). At about 1:40 we arrived Picun Village, the group arrived earlier had set up a temperory observing field on the ground in the front of the local goverment building. Everyone was unpacking their equipments with a hurry. I, too, dragged my 11x70 binocular out from my bag as quickly as I could. Less than 15 seconds did I spotted comet -- it's almost impossible to miss that bright, fuzzy, lovely target, with a mild anti-tail pointing east, that's really gorgeous! I measured its brightness to be 4.6, with a ~25' coma and a tail at a length of ~1.7 deg. Heng estimated the brightness to be around 4.2 with his 10-cm refractor. We could spotted it easily with naked-eye, the estimate is about the same with the binocular's -- around 4.5 mag. with a 30' coma, but I couldn't detect the tail with naked-eye.
Xun Zheng, a journalist of the Evening News who had monitored activities of our association for a long time, took some nice photos of us, and two of them were printed on the Yangcheng Evening News later that day. After obtaining Xun's permission, I'm posting some of them here.
I also took a glance of a few dozens Messier objects with my binocular before the sky turned bad at around 5 a.m. We learnt later that the sky of Gaocun also became clear but still far from Picun's. As an old Chinese saying goes, "Man proposes, but God disposes." For any astronomical activities, no matter how well you prepared, the God only need a patch of cloud to let your preparation get ruined. We were very lucky to get 3 hours clear sky that night.
As spaceweather.com had reported, Lulin's tail is changing rapidly. Around Feb. 22 the ion tail suddenly showed some complex structure, but on Feb. 25 the ion tail was torn away by a solar win gust (I'm not fully agree with this solution; it might as well be the geometry effect which had made the ion tail disappeared). On the other hand, the appearance of the comet appeared to be about normal (as the structure of ion tail is not visible to visual observers under most occasion), except the main tail is an anti-one: it points directly to the sun! But after Feb. 26, the double-tail Lulin will become mostly single-tail since the comet has passed the opposition point and the geometry effect (see my earlier explanation) disappears. Stay tuned for updates!
Comet Lulin visible under worst condition
Feb 24th
I carried my 11x70 to the top of our dormitory at around 14:50 UT. The sky condition has improved significantly compare to that of the morning (overcast), but it's still mostly cloudy, with a few bright stars occasionary visible in the cloud gaps, I estimated the LM to be around +1.0 at that moment, one of the worst observing nights I have ever experienced. However I still manage to spot the comet. At around 15:05 UT, a clear region was passing over the Lulin region, so I point my binocular to the southeast direction of Saturn. I move the observing field a little bit and feel that there is a small "cloud" near a curve lined by four stars. A very clear gap was just passing the region and I was able to confirm its existances. A 7.46 mag. star coded TYC 267-888-1 was also visible at those seconds, so I estimated the surface brightness of the comet to be around 7.5 mag, with a diameter up to around 20'. The cloud came again after less than half a minute and was increasing again, after waiting for five minutes I packed my binocular and went downstairs.
I'm very pleased to find the comet is such a bad condition, but I think experiences are required under such a condition. Also I need to point out that the brightness estimation is far from reliable since the sky condition is far from satisfying.
I should have wait for more time but today I'm very tired. I think I must go to bed now or I may catch a cold. Good luck to you all!
Update: I just receive a fresh image from Lulin Observatory, taken by the Lulin 10-cm f/8 refractor with U9000 CCD last night (300s x 5 combined). The comet looks really gorgeous! Note its newly-developed beautiful dust tail! After earning their permission to publicaze the image on my blog, I'm showing it here. Well, I just bound up my hair for a few hours last night and the comet soon made a response? (the comet looks very different now comparing the images prior to Feb. 22, you may browse spaceweather.com for a comparasion) Bravo, fantastic. I'll depart soon for Gaocun Village, a remote site about 150 kilometers from Guangzhou which is one of the bases of our Guangdong Southern Cross Star Association, for a good view of the comet. Stay tuned for updates.
Lulin to reach her brightness maximum
Feb 23rd
It has been quite a while since my last update about Lulin. Sorry, guys, I learn that many of you keep visiting my blog to see what's up with Lulin's boyfriend. Actually, I was on travel from Feb. 2 to 21, that's in the course of my "five-ring" project. I plan to visit China's every corner by complete five paths on the country, and this ring is the No. 2. This time I travel about 5,200 kilometers, while 312.7 kilometers of them were in hiking, I visited 16 places in those 20 days, and this trip is nicknamed "eastern minor ring" by myself.
Okay, enough chatter. The new term has begun so I back home and back to the campus, with my 11x70 binocular this time. I had once brought my 11x70 and even the 13-cm refractor to my dormitory, but they did not stay for long -- because our dormitory building is facing the girl's, so there had been some guys asking what could I see through the telescope when pointing it to... somewhere. "Oh well," I replied, "be aware that you will see many pores!" After all, I brought my telescopes home.
According to the most recent (in 24 hours) observations, Comet Lulin has brighten to about mag. 4.6-5.0, with a coma of 20'-30' (even as large as 50' in naked-eye reports) and a tail at a length at about 1-2 deg. Here at Guangzhou it's still cloudy, but I expect the sky to be partly clear tonight and mostly clear in Tuesday night. To let you know, I can't wait anymore to see the most beautiful Lulin!
Although there are no observations from the discoverer at this moment, I get something that might be interesting. After Dr. Tony Phillips' article at NASA, Lulin has got a new nickname, "The Green Comet". I love this name, not only because the fresh green fuzzy ball is lovely indeed, but also for another reason. Why does it looks green? Cyanogen and diatomic carbon count one; another reason is a Chinese language humor -- my family name is Ye ("叶", pronounce as "yeah"), and this means "leave" in Chinese, while Chi Sheng Lin's family name means "forest" ("林", combination of two "wood" charactor), both "Ye" and "Lin" relate to green color, so that may be one of the reasons why the comet looks green.
There are confusions about why Lulin has two opposited tails. I create a simple figure to explain this phenomena, see below.
Okay, so much for this. The sky is clearing, so I'm going out for a try. Stay tuned for update!
Valentine's Day with Comet Lulin?
Feb 14th
Today is my last day at Nanjing, I visited Ming Tomb, Dr. Sun Yat-sen's Mausoleum, Gate of China, Nanjing Wall, etc. These places are great (actually, you may have seen the recently-updated photos here, they were all taken during my country-cross travel). But the biggest surprise is made by Liaoshan and Yunxi, sending me such a message: "Happy Valentine's Day -- with you 'Lulin'!"
Okay, I admit that Liaoshan had remind me to take a look of Lulin at Valentine's Day yesterday, but I had enjoy my trip so much so I wouldn't like to move out in the cold winds for a glimpse of the comet. "Oh well, the weather won't permit me to do that," I told her, "today (Feb. 13) is cold and rainy." But actually, Feb. 14 is mostly clear.
So I made something special to celebrate the only Valentine's Day with Comet Lulin: for the first time in my life, I make up my hair to match the appearance of the comet (as below). Can you find the "ion-tail" on my forehead?
I'd most probably have three snowy days at Mount Huangshan, so it's unlikely for me to spot Comet Lulin there. Anyway, I'll try to see it again at her brightest after I back to Guangzhou. Thanks Liaoshan and Yunxi for the reminds!
Lulin's reminder
Feb 8th
Sorry for lacking of updates on Lulin, I haven't many stories to tell as the comet speaks itself (herself), what's more, I'm now on a cross-country travel and is always on mobile, so I can't write much. If any of you happens to be at a YHA around Shanghai now, please let me know and we could possibly meet. Now I'm at a YHA hostel at Suzhou.
Okay, I just got a humor. I had mention earlier that I had let myself grow a long hair in order to "simulate" Lulin's tail. However, my parents and my friends don't like it, partly because I don't do make-up and my hair looks like a bad grassfield. A few days ago they found a very good reason for persuading me to cut it short: "Lulin's tail 'brokes'" (see http://www.spaceweather.com/archive.php?PHPSESSID=1s4hdb74jqcn8s8ss7juiaggl4&month=02&day=05&year=2009&view=view).
"Your Lulin reminds you that it's time to cut your hair!" Liaoshan Shi sent me a short message via mobile phone. This is a good humor, I admit, but her trick still doesn't work, I simply make my hair more tousy to make it appeared to be "disconnected"!
Lulin dating compaign: update on Jan. 31
Jan 31st
I drag myself out of bed again at 4:30 a.m. It's another very clear night, with limiting magnitude around 5.4 (using IMO method -- but this do not mean that tonight is better than last night, since last night I had to use a not-well located reference field as the cirrus block the favourite one). I get the 13-cm refractor out and set it up, but it takes me a little bit longer than last night to see the comet.
With a telescope, the sky quality seems to be slightly better than last night, the faintest star I have been able to see is TYC 6174-464-1 at 12.28 mag, but (26) Proserpina (12.5 mag) is still invisible. Galaxy NGC 5890 (at 12.6 mag) is only 10' away according to the map, unsurprisingly it's not visible, too. Tonight I have much more options on comparasion stars -- but the observation doesn't make me feel exciting. I estimate the total brightness of the comet to be around 7.3 mag using Morris method, with six comparasion stars at mag 6.17-7.97, while the coma diameter to be 7'. The comet's look does not change much except a 30" dense core run out tonight. Tonight's estimate is 0.5 mag fainter than that of last night, I think tonight's one is more reliable since only two comparasion stars were used last night.
Shortly before the astronimical twilight starts, I also give a try on NGC 5892, a galaxy about 3 degrees away at 12.0 mag, but with no luck. Seems its surface brightness is still too dim. I then shift back to Lulin and see it off in the twilight (still barely visible even after the nautical twilight started!).
I'm not sure when would the next dating occur. I'll be away for a three-week tour in the country soon, and the rainy season will begin at Guangzhou before I come back. I'll try if I can spot it with naked-eye when I arrive at Mt. Huangshan in mid Feburary.
Second dating with Lulin
Jan 30th
As Comet Lulin is now approaching the Earth, the questions such as "how is your comet" or "did you take look at your comet" frequently fly into my ears. When replying these questions, I'd love to refer the comet as "my girl", and a standard reply is "no, I haven't date with her since last August". What's more, for a co-activity with Lulin's "heaven" show, I let my hair grow to a record length, and promise to my friends that "I will make it up according to the appearance of Lulin's tails". But actually, up to now, I have no time to make it up, and to be honest, no idea on how to make it up. I used to keep my hair very short. (the "public" reason is that the Lulin's tails are generally not visible yet)
As several cold fronts went over the Pearl River Delta around the Chinese New Year's Day, the air quality had improved to a very remarkable level. On Jan. 27, the Air Pollution Index (API) of Guangzhou's downtown was even down to 14 (while the average API of the downtown area is around 70-80). The Astroweather Panel suggested the sky would be clear in the morning of Jan. 30, so I went to my house at the countryside for a 4-day stay on Jan. 28. The air quality there was even more surprising -- with API lower than 4. Such an excellent air quality is rarely seen in the well-polluted Pearl River Delta area.
When I drag myself out of bed at 4 a.m. in the morning of Jan. 30, the sky did cleared up, although not as that good as Astroweather Panel predicted -- there are still a few cirrus on the sky. I checked the values of a nearby meteorological station, the temperature is 9.8C, not very low yet. So I carried by 80-mm f/5 refractor out. Except the cirrus, the sky is remarkably clear, I estimate the limiting magnitude to be 5.1 with IMO method -- also a record for this observing site. I wait for a few minutes until the cirrus move away from Libra, then point the telescope to the area. I don't bring my laptop out -- I was always very lazy and would not bring my laptop to the telescope, until I admit I'm unable remember the exact location of the target I want to observe. But this time I get a bonus, a fuzzy ball appeared in my view within only half a minute. I went into my bedroom, check the finding map, and confirm it's indeed "my girl".
I moved my biggest telescope -- a 13-cm f/6.4 refractor -- into the observing field. The 13-cm has a much better quality than the 8-cm. I point it to the comet, and try to estimate the comet's brightness using Sidgwick method. I'm not a good visual comet observer, and there are not sufficient comparasion stars around the area, so the observasion may be of some errors. The first estimate is 6.1 mag, but shortly after that I find out the comet is just occulting with a 10.72 mag star (TYC 6175-46-1), so I wait until it moves away from the star and make a second estimate. The final estimate is 6.7 mag with coma diameter to be 7'. The comet is slightly elongated over the ecliptic. After observed the comet, I make some attempts to see how deep I can go. A 12.16 mag star (TYC 6175-765-1) is visible, although not easily, but an asteroid nearby (26 Proserpina, around 12.5 mag) can not be seen, so the limiting magnitude for the 13-cm refractor at this night should be around 12.2 mag.
The twilight appears and marks the end of observing, I watch a beautiful sunrise (I always get excited about sunrises and sunsets!) at the observing field before go back to sleep. The visibility is also very remarkable today -- the 50-km away Mount Apoliu is clearly visible in twilight over a small patch of "cloud-sea".
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