Hello all,

  Here shows two images of fragment M and N, and a possible new complex fragments. All images are photographed by the Lulin One-meter Telescope (LOT), on 180 seconds x 4 each.

full pixel at http://ccn.lamost.org/test/73p_flagment_2.jpg

  This is the image on April 4, fragment M could be seen. And on northwest we detect a new fragment, the seeing was very good that night, we found the new fragment might be a double one.

     QY6455H 1C2006 04 04.64763 14 31 34.227+22 07 38.26         21.33R      D35
     QY6455H 1C2006 04 04.65061 14 31 34.373+22 07 39.63         21.74R      D35
     QY6455H 1C2006 04 04.65358 14 31 34.594+22 07 44.17         21.60R      D35
     QY6455H 1C2006 04 04.65655 14 31 34.885+22 07 47.71         21.97R      D35
     QY6455I 1C2006 04 04.64763 14 31 34.650+22 07 37.14         21.65R      D35
     QY6455I 1C2006 04 04.65061 14 31 34.744+22 07 41.25         21.88R      D35
     QY6455I 1C2006 04 04.65358 14 31 35.021+22 07 45.12         21.80R      D35

full pixel at http://ccn.lamost.org/test/73p_flagment_3.GIF

  And here is the image of April 7, we could detect fragment M and N, but the possible fragment detected on April 4 was not recovered. Instead, on southeast of fragment M we detect another new fragment.

     QY64846 1C2006 04 07.62041 14 35 48.058+23 10 01.76         20.52R      D35
     QY64846 1C2006 04 07.62329 14 35 48.108+23 10 03.18         20.30R      D35
     QY64846 1C2006 04 07.62626 14 35 48.435+23 10 08.78         19.92R      D35
     QY64846 1C2006 04 07.62926 14 35 48.724+23 10 12.18         20.23R      D35

  I have checked the observations from Mt.Lemmon, none of the above two fragments are found on April 2, but in the observations of April 7 I found this object, which is undesigned too:

      6GC355F  C2006 04 07.46400 14 35 21.86 +23 07 44.6          20.4 V      G96
      6GC355F  C2006 04 07.47123 14 35 22.28 +23 07 55.3                      G96
      6GC355F  C2006 04 07.47855 14 35 23.00 +23 08 05.1                      G96
      6GC355F  C2006 04 07.48586 14 35 23.46 +23 08 13.3                      G96

  Orbit calculations showed the three objects are quite complex. If QY6455H/I = QY64846, this fragment's orbit would be:

QY6455H
   Perihelion 2006 Jun 7.954565 TT
Epoch 2006 Apr  8.0 TT = JDT 2453833.5                  Ye
M 342.84722              (2000.0)            P               Q
n   0.28140259     Peri.  215.24150      0.02115394      0.98502569    
a   2.3063080      Node    56.55703     -0.86376467      0.10418800    
e   0.6147198      Incl.   11.83270     -0.50345118     -0.13736533    
P   3.50           H   22.0           G   0.15      q 0.8885747
From 7 observations 2006 Apr. 4-7;   RMS error 1.195 arcseconds

  But if QY6455H/I = 6GC355F (I trend to believe this linkage), we could still get a reasonable orbit (though, not as good as the above linkage):

QY6455H
   Perihelion 2006 Jun 7.684741 TT
Epoch 2006 Apr  7.0 TT = JDT 2453832.5                  Ye
M 337.50455              (2000.0)            P               Q
n   0.36468403     Peri.  233.95758      0.11289585      0.98038796    
a   1.9402523      Node    43.42310     -0.81920559      0.18384256    
e   0.5785913      Incl.   13.59178     -0.56227815     -0.07100244    
P   2.70 /987.14d  H   22.9           G   0.15      q 0.8176391
From 7 observations 2006 Apr. 4-7;   RMS error 1.041 arcseconds

  So I'm quite confuse about which is right. I will try to do a third-night observation as soon as possible, but now seems Lulin is going to experience several cloudy nights. Could anyone do a confirmation for this object?

Regards,

Quanzhi