(315530) 2008 AP129 Precovery Images

(315530) 2008 AP₁₂₉ Precovery Images

The discovery announcement for this object included astrometry from only two oppositions, so there was considerable uncertainty in the estimated position of precovery images. Fortunately, 2008 AP₁₂₉ was found on a 1993 plate only 70" away from the prediction. With an updated orbit, two additional images from 1989 and 1992 were also detected.

The following astrometry was submitted to the Minor Planet Center:

     K08AC9P   1989 10 09.44583 05 46 28.54 +49 45 33.4                      261
     K08AC9P   1992 11 25.40347 06 16 06.14 +50 50 30.9                      261
     K08AC9P   1993 12 10.32917 06 25 30.05 +51 01 16.5                      261

At the end of this page are the elements and residuals before and with the new data. The new orbit is much more accurate because the object has now been observed for 19 years instead of one year. 2008 AP₁₂₉ was numbered on 2012-02-07.

View the Discovery Announcement.


	1993 Dec. 10.32917 UTC RA 06h25m30.05s Dec. +51°01'16.5" 50-minute exposure Size = 150" x 150" Palomar Mountain-DSS plate XJ206-A0XS

	1992 Nov. 25.40347 UTC RA 06h16m06.14s Dec. +50°50'30.9" 50-minute exposure Size = 150" x 150" Palomar Mountain-DSS plate XJ205-A0WT

	1989 Oct. 09.44583 UTC RA 05h46m28.54s Dec. +49°45'33.4" 90-minute exposure Size = 150" x 150" Palomar Mountain-DSS plate XP204-A0W2

Original elements and residuals from the Minor Planet Center

2008 AP₁₂₉

Epoch 2010 Jan. 4.0 TT = JDT 2455200.5                  MPC
M  39.41406              (2000.0)            P               Q
n   0.00366424     Peri.   56.69673     +0.34114652     -0.93260741             T = 2444444.09418 JDT
a  41.6690269      Node    14.81322     +0.63373567     +0.13567509             q =    35.8977515
e   0.1385028      Incl.   27.42026     +0.69426086     +0.33441843
P 269              H    5.3           G   0.15           U   5
From 19 observations at 2 oppositions, 2008-2009, mean residual 0".21.
  
Residuals
20080111  675  0.0   0.2-    20080213  675  0.1+  0.1+    20081009  675  0.4+  0.4+
20080111  675  0.0   0.1+    20080213  675  0.2+  0.1+    20081012  675  0.4-  0.2-
20080114  675  0.0   0.1+    20080213  675  0.2+  0.1-    20081012  675  0.1-  0.3-
20080114  675  0.4-  0.5+    20080429  675  0.1+  0.5-    20090128  675  0.2-  0.0
20080131  675  0.0   0.1+    20080429  675  0.0   0.1-    20090128  675  0.1+  0.1+
20080131  675  0.3-  0.0     20080520  675  0.2-  0.0
20080131  675  0.0   0.1-    20081009  675  0.2+  0.2+

Revised elements and residuals from the Minor Planet Center (new astrometry is shown in red)

2008 AP₁₂₉

Epoch 2010 Jan. 4.0 TT = JDT 2455200.5                  MPC
M  39.37837              (2000.0)            P               Q
n   0.00366585     Peri.   56.78530     +0.33970262     -0.93313421             T = 2444458.55540 JDT
a  41.6568237      Node    14.81335     +0.63394556     +0.13469358             q =    35.9072008
e   0.1380236      Incl.   27.42024     +0.69477706     +0.33334396
P 269              H    5.3           G   0.15           U   2
From 22 observations at 5 oppositions, 1989-2009, mean residual 0".21.
  
Residuals
19891009  675  0.2-  0.1+    20080131  675  0.4-  0.0     20081009  675  0.2+  0.1+
19921125  675  0.1+  0.1-    20080131  675  0.1-  0.1-    20081009  675  0.4+  0.4+
19931210  675  0.1+  0.0     20080213  675  0.1+  0.1+    20081012  675  0.3-  0.2-
20080111  675  0.1-  0.1-    20080213  675  0.2+  0.1+    20081012  675  0.0   0.3-
20080111  675  0.1-  0.1+    20080213  675  0.2+  0.1-    20090128  675  0.0   0.2-
20080114  675  0.1-  0.1+    20080429  675  0.2+  0.5-    20090128  675  0.3+  0.0
20080114  675  0.5-  0.5+    20080429  675  0.1+  0.1-
20080131  675  0.0   0.1+    20080520  675  0.1-  0.0

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