Lulin Sky Survey Electronic Circular No. 19
LULIN SKY SURVEY
[email protected]
URL http://luss.y234.cn/
Issued 2006 June 6, 8:19 UT
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2006 KY38
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Epoch 2006 May 25.0 TT = JDT 2453880.5                  MPC
M 351.04376              (2000.0)            P               Q
n   0.27583875     Peri.   26.45435     -0.03598914     +0.99385029             T = 2453912.96910 JDT
a   2.3372179      Node   241.64288     -0.93668396     -0.07007031             q =     1.4472533
e   0.3807794      Incl.    6.83439     -0.34832160     +0.08574237    Earth MOID = 0.43550 AU
P   3.57           H   19.6           G   0.15
From 11 observations 2006 May 22-June 5.
 
Residuals
20060522 *D35  0.0-  0.4+    20060529  704  1.0-  2.7-    20060605  704  0.0-  0.8-
20060522  D35  0.0-  0.5-    20060529  704  0.4-  3.3-    20060605  704  0.7+  0.3+
20060525  D35  0.0-  0.2-    20060529  704  0.5+  0.3+    20060605  704  1.2+  0.2+
20060525  D35  0.1+  0.5+    20060529  704  0.5-  0.4-
20060525  D35  0.1-  0.2-    20060605  704  1.9-  0.3+

  Minor Planet Center published a update orbit of 2006 KY38 in MPEC 2006-L33. Now definitely the object is not an Amor group, but an Alinda group member. Alindas are held by the 1:3 resonance with Jupiter. If I understand what's happening here, an object that enters this resonance has its eccentricity steadily pumped up, until it eventually has a close encounter with an inner planet that breaks the resonance. Some Alindas, such as (4179) Toutatis, have perihelia very close to the earth's orbit, the result is a series of close passes at four-year intervals.
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Quanzhi Ye              (C) Copyright 2006 Lulin Sky Survey              LUSSEC 19