2002 XV93 Precovery Images

2002 XV93 Precovery Images


With a reliable set of elements for this TNO (4 oppositions from 2002-2007), precovery images from 1990, 1991, and 1992 were found close to their predictions. Curiously, 2002 XV93 was at least 0.5 magnitude brighter than expected.

The following astrometry was submitted to the Minor Planet Center:

     K02X93V   1990 10 16.40035 03 24 54.20 +26 58 25.1                      261
     K02X93V   1991 10 12.40937 03 30 32.81 +27 31 46.4                      261
     K02X93V   1992 09 28.46389 03 36 46.10 +28 04 07.1                      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 17 years instead of five years.

View the Discovery Announcement. See also MPEC 2003-Y51.


1992 Sep. 28.46389 UTC

RA 03h36m46.10s Dec. +2804'07.1"

90-minute exposure

Size = 150" x 150"

Palomar Mountain-DSS plate XP418-A0C1

1991 Oct. 12.40397 UTC

RA 03h30m32.81s Dec. +2731'46.4"

55-minute exposure

Size = 150" x 150"

Palomar Mountain-DSS plate XJ481-A1ES

1990 Oct 16.40035 UTC

RA 03h24m54.20s Dec. +2658'25.1"

85-minute exposure

Size = 150" x 150"

Palomar Mountain-DSS plate XP481-A1J3


Original elements and residuals from the Minor Planet Center

2002 XV93

Epoch 2007 Oct. 27.0 TT = JDT 2454400.5                 MPC
M 267.42377              (2000.0)            P               Q
n   0.00401785     Peri.  166.00436     -0.99393298     +0.08033318             T = 2477441.76450 JDT
a  39.1868706      Node    19.09126     -0.10919176     -0.80271076             q =    34.2707742
e   0.1254526      Incl.   13.27877     +0.01320557     -0.59093318
P 245              H    4.9           G   0.15           U   3
From 26 observations at 4 oppositions, 2002-2007, mean residual 0".32.
  
Residuals
20021210  644  0.0   0.0     20031122  695  0.0   0.0     20031218  621  1.1-  0.2+
20021210  644  0.1-  0.1+    20031123  695  0.1-  0.1-    20031218  621  0.6-  0.1-
20021210  644  0.4+  0.4+    20031123  695  0.0   0.1+    20041119  176  0.3-  0.1-
20030104  675  0.0   0.0     20031123  695  0.1-  0.0     20041120  176  0.7+  0.4+
20030104  675  0.1+  0.1-    20031204  568  0.3-  0.0     20041212  290  0.1-  0.0
20030105  675  0.3-  0.3-    20031204  568  0.2-  0.0     20041212  290  0.1+  0.1-
20030221  621  0.3-  0.1-    20031217  621  0.7+  0.3-    20071111  688  0.1-  0.0
20030222  621  0.3+  0.2+    20031217  621  1.0+  0.4-    20071111  688  0.0   0.1+
20030223  621  0.1-  0.5+    20031217  621  0.2+  0.3-


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

2002 XV93

Epoch 2007 Oct. 27.0 TT = JDT 2454400.5                 MPC
M 267.38677              (2000.0)            P               Q
n   0.00401838     Peri.  166.03584     -0.99388520     +0.08091338             T = 2477447.90921 JDT
a  39.1833983      Node    19.09330     -0.10966601     -0.80264473             q =    34.2683513
e   0.1254370      Incl.   13.27910     +0.01286795     -0.59094370
P 245              H    4.9           G   0.15           U   3
From 29 observations at 7 oppositions, 1990-2007, mean residual 0".32.
  
Residuals
19901016  675  0.1+  0.2-    20030222  621  0.3+  0.3+    20031217  621  0.2+  0.3-
19911012  675  0.5-  0.0     20030223  621  0.0   0.6+    20031218  621  1.1-  0.2+
19920928  675  0.5+  0.0     20031122  695  0.1-  0.0     20031218  621  0.6-  0.1-
20021210  644  0.0   0.1+    20031123  695  0.1-  0.1-    20041119  176  0.3-  0.1-
20021210  644  0.1-  0.1+    20031123  695  0.1-  0.1+    20041120  176  0.6+  0.3+
20021210  644  0.3+  0.4+    20031123  695  0.1-  0.0     20041212  290  0.0   0.0
20030104  675  0.0   0.0     20031204  568  0.3-  0.0     20041212  290  0.1+  0.1-
20030104  675  0.1+  0.0     20031204  568  0.3-  0.1+    20071111  688  0.0   0.1-
20030105  675  0.3-  0.3-    20031217  621  0.7+  0.3-    20071111  688  0.1+  0.1-
20030221  621  0.2-  0.0     20031217  621  1.0+  0.4-

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


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