2007 RW10 Precovery Images

2007 RW10 Precovery Images


2007 RW10 is one of the smallest TNOs to be successfully precovered. The original orbit (four oppositions from 2001 to 2008) was quite accurate, and 2007 RW10 was considerably brighter during the 1980s and 1990s when it passed perihelion.

The target was traversing the summer Milky Way during this time, and as seen in the precovery images below, there were many stars in the area. Fortunately, two images in 1988 and 1990 were found only 7" from their predicted positions.

The following astrometry was submitted to the Minor Planet Center:

     K07R10W   1988 06 17.37694 19 47 41.45 +14 36 31.9                      261
     K07R10W   1990 06 23.41910 20 22 10.41 +14 11 59.7                      261 
At the end of this page are the elements and residuals before and with the new data. The new orbit is more accurate because the object has now been observed for over 20 years instead of seven years.

View the Discovery Announcement. See also MPEC 2008-X68.


1990 June 23.41910 UTC

RA 20h22m10.41s Dec. +1411'59.7"

55-minute exposure

Size = 150" x 150"

Palomar Mountain-DSS plate XJ668-A1G1

1988 June 17.37694 UTC

RA 19h47m41.45s Dec. +1436'31.9"

65-minute exposure

Size = 150" x 150"

Palomar Mountain-DSS plate XJ666-A1FZ


Original elements and residuals from the Minor Planet Center

2007 RW10

Epoch 2009 June 18.0 TT = JDT 2455000.5                 MPC
M  51.52323              (2000.0)            P               Q
n   0.00588284     Peri.   96.70110     +0.21402552     +0.97417011             T = 2446242.27987 JDT
a  30.3909705      Node   187.02655     -0.95053222     +0.22468726             q =    21.1789757
e   0.3031162      Incl.   36.06271     +0.22512571     +0.02254393
P 168              H    6.2           G   0.15           U   2
From 38 observations at 4 oppositions, 2001-2008, mean residual 0".33.
  
Residuals
20011005  644  0.6-  0.3-    20070916  675  0.6-  0.2-    20071129  675  0.3-  0.1-
20011005  644  0.1+  0.1-    20071004  688  0.8-  0.2- Y  20071129  675  0.2-  0.2+
20011013  644  0.2+  0.2+    20071004  688  0.8+  0.2+ Y  20071129  675  0.2-  0.2+
20011013  644  0.2-  0.2+    20071004  688  0.2+  0.5- Y  20080729  675  0.5+  0.3-
20011013  644  0.1+  0.0     20071014  246  0.8+  0.5+    20080729  675  0.1-  0.2-
20020904  644  0.0   0.0     20071014  246  0.7+  0.3+    20080729  675  0.3+  0.2-
20020912  644  0.4+  0.3-    20071014  246  0.6+  0.1-    20080730  675  0.3-  0.4-
20020913  644  0.2+  0.0     20071019  675  0.3-  0.0     20081023  695  0.0   0.1-
20070909  675  0.4-  0.1-    20071019  675  0.1-  0.3+    20081024  695  0.1+  0.0
20070909  675  0.1+  0.3+    20071019  675  0.0   0.5-    20081024  695  0.1+  0.0
20070910  675  0.3-  0.2+    20071106  675  0.3-  0.4+    20081130  688  0.0   0.0
20070910  675  0.2+  0.4+    20071106  675  0.2-  0.5+    20081130  688  0.2-  0.2-
20070916  675  0.5-  0.5-    20071106  675  0.1-  0.4+


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

2007 RW10

Epoch 2009 June 18.0 TT = JDT 2455000.5                 MPC
M  51.52202              (2000.0)            P               Q
n   0.00588282     Peri.   96.70611     +0.21411059     +0.97415142             T = 2446242.45152 JDT
a  30.3910492      Node   187.02654     -0.95051237     +0.22477029             q =    21.1798626
e   0.3030888      Incl.   36.06276     +0.22512859     +0.02252407
P 168              H    6.2           G   0.15           U   2
From 40 observations at 6 oppositions, 1988-2008, mean residual 0".32.
  
Residuals
19880617  675  0.0   0.0     20070916  675  0.4-  0.5-    20071129  675  0.2-  0.1-
19900623  675  0.1+  0.1+    20070916  675  0.6-  0.2-    20071129  675  0.2-  0.2+
20011005  644  0.7-  0.3-    20071004  688  0.7-  0.2- Y  20071129  675  0.1-  0.2+
20011005  644  0.0   0.1-    20071004  688  0.9+  0.2+ Y  20080729  675  0.5+  0.3-
20011013  644  0.1+  0.1+    20071004  688  0.2+  0.5- Y  20080729  675  0.1-  0.2-
20011013  644  0.3-  0.1+    20071014  246  0.9+  0.5+    20080729  675  0.3+  0.2-
20011013  644  0.0   0.0     20071014  246  0.7+  0.3+    20080730  675  0.3-  0.4-
20020904  644  0.1+  0.0     20071014  246  0.6+  0.1-    20081023  695  0.1-  0.1-
20020912  644  0.5+  0.4-    20071019  675  0.2-  0.0     20081024  695  0.0   0.1+
20020913  644  0.2+  0.1-    20071019  675  0.1-  0.3+    20081024  695  0.0   0.0
20070909  675  0.3-  0.1-    20071019  675  0.1+  0.5-    20081130  688  0.0   0.0
20070909  675  0.1+  0.3+    20071106  675  0.2-  0.4+    20081130  688  0.3-  0.2-
20070910  675  0.3-  0.2+    20071106  675  0.1-  0.5+
20070910  675  0.2+  0.4+    20071106  675  0.1-  0.4+


DSS precovery images are from DSS plate archive scans, which are copyright California Institute of Technology.


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