Lulin Sky Survey Electronic Circular No. 32
LULIN SKY SURVEY
[email protected]
URL http://luss.y234.cn/
Issued 2006 July 24, 7:53 UT
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NEW DISCOVERIES, 2006 OC2, 2006 OD2
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NEW DISCOVERIES

#LUSS Designation Discovered date (UT) Discoverer(s)
90 2006 OG5 July 18, 2006 H. C. Lin, Q. Ye

2006 OC2

Q. Ye reported a potential Jovian Trojan to MPC, which found by himself and H. C. Lin on July 18. The object was successfully follow-up by H. C. Lin and C. S. Lin on July 20 and 22. 2006 OC2 is a member of Jovian Trojan L4 (or say, Greek node), the very first orbit elements were published on MPEC 2006-O37 as follow:

Epoch 2006 July 4.0 TT = JDT 2453920.5 MPC
M 247.72919 (2000.0) P Q
n 0.08196752 Peri. 118.14245 +0.53965874 -0.83809540 T = 2455290.19877 JDT
a 5.2485765 Node 298.97811 +0.73689490 +0.51605978 q = 5.1609192
e 0.0167012 Incl. 5.23238 +0.40712941 +0.17685701
P 12.0 H 14.7 G 0.15
From 11 observations 2006 July 18-22.

The first Trojan discovery of Lulin Sky Survey is 2006 OT, which is also a Jovian Trojan L4. But it soon be linked with 2004 KN6, and the credit should refer to LINEAR, the discoverer of 2004 KN6. 2006 OC2 is the first credit-hold Trojan discovery by Lulin Sky Survey. As H=14.7 (diameter about 4-6km), it\'s also the largest found of Lulin Sky Survey up to date.

2006 OD2

Q. Ye detected a faint Trojan-alike object on the images taken by H. C. Lin on July 18. H. C. Lin and C. S. Lin had successfully tracked on it on July 20 and 22. 2006 OD2 could be refered to a odd member of Mars-crosser group, it also has some commons with Alinda group. The very first orbit elements were published on MPEC 2006-O37 as follow:

Epoch 2006 July 4.0 TT = JDT 2453920.5 MPC
M 356.90079 (2000.0) P Q
n 0.20288640 Peri. 182.10957 +0.50048954 +0.86358777 T = 2453935.77560 JDT
a 2.8683628 Node 117.92797 -0.79328821 +0.48569937 q = 1.6277945
e 0.4325005 Incl. 3.96176 -0.34670454 +0.13532289 Earth MOID = 0.61194 AU
P 4.86 H 21.5 G 0.15
From 7 observations 2006 July 18-22.

The object is faint(Vmag=21.7), and it\'s also the smallest found of Lulin Sky Survey up to date (diameter about 200-300m).
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Quanzhi Ye (C) Copyright 2006 Lulin Sky Survey LUSSEC 32