(208996) 2003 AZ84 Precovery Images

(208996) 2003 AZ84 Precovery Images


The original elements for 2003 AZ84 were reasonably accurate (five oppositions from 2001 to 2006), so there was high hope of identifying a number of precovery images. Unfortunately, 2003 AZ84 was found on only one plate. On a second plate taken on 1998 Jan. 02, the object would have been located in front of a bright star.

The animated GIF below shows that the identification is correct, as the second plate taken of the same area on a different date shows that the object has moved.

The following astrometry was submitted to the Minor Planet Center:

     K03A84Z   1996 03 19.16319 06 36 26.97 +16 40 38.4                      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 ten years instead of five years. 2003 AZ84 was numbered in March 2009.

View the Discovery Announcement. See also MPEC 2003-G29.


1996 Mar. 19.16319 UTC

RA 06h36m26.97s Dec. +1640'38.4"

40-minute exposure

Size = 150" x 150"

Palomar Mountain-DSS plate XJ627-A1FR


Original elements and residuals from the Minor Planet Center

2003 AZ84

Epoch 2007 Oct. 27.0 TT = JDT 2454400.5                 MPC
M 215.78401              (2000.0)            P               Q
n   0.00398825     Peri.   15.23171     -0.05282801     +0.97321577             T = 2490560.67531 JDT
a  39.3804612      Node   252.14203     -0.93901291     -0.12465274             q =    32.2255302
e   0.1816873      Incl.   13.59558     -0.33979988     +0.19316512
P 247              H    3.9           G   0.15           U   5
From 35 observations at 5 oppositions, 2001-2006, mean residual 0".35.
  
Residuals
20011216  644  0.2-  0.6+    20030126  675  0.4+  0.1+    20030401  675  0.0   0.0
20011216  644  0.7-  1.1+    20030306  662  0.2-  0.6+    20030402  675  0.1-  0.1-
20011216  644  0.3-  1.2+    20030306  662  0.3-  0.4+    20031028  621  0.3-  0.1+
20011228  644  0.7+  0.6-    20030323  673  0.2+  0.2-    20031105  621  0.0   0.3-
20020206  644  0.5+  0.4-    20030323  673  0.1+  0.3-    20031106  621  0.1+  0.2-
20020206  644  0.4-  0.4-    20030323  673  0.1-  0.2-    20041211  621  0.2+  0.1-
20020206  644  0.0   0.1-    20030323  673  0.3-  0.2-    20041211  621  0.2+  0.2-
20030113  644  0.3-  0.2+    20030324  673  0.2+  0.5-    20041211  290  0.0   0.3+
20030113  644  0.3-  0.2+    20030324  673  0.1+  0.3-    20041211  290  0.2+  0.4+
20030113  644  0.2-  0.1+    20030325  673  0.0   0.0     20060225  688  0.3-  0.3+
20030126  675  0.0   0.0     20030325  673  0.3+  0.1-    20060225  688  0.2-  0.4+
20030126  675  0.2-  0.2-    20030325  673  0.1+  0.0



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

2003 AZ84

Epoch 2007 Oct. 27.0 TT = JDT 2454400.5                 MPC
M 216.03955              (2000.0)            P               Q
n   0.00398757     Peri.   15.05495     -0.05586188     +0.97304912             T = 2490502.79843 JDT
a  39.3849665      Node   252.14017     -0.93862134     -0.12757474             q =    32.2215887
e   0.1818810      Incl.   13.59498     -0.34039599     +0.19209398
P 247              H    3.9           G   0.15           U   3
From 36 observations at 6 oppositions, 1996-2006, mean residual 0".35.
  
Residuals
19960319  675  0.0   0.2-    20030126  675  0.1-  0.2-    20030325  673  0.1+  0.1-
20011216  644  0.2-  0.6+    20030126  675  0.5+  0.0     20030401  675  0.0   0.0
20011216  644  0.7-  1.1+    20030306  662  0.2-  0.6+    20030402  675  0.1-  0.2-
20011216  644  0.3-  1.3+    20030306  662  0.2-  0.4+    20031028  621  0.1-  0.0
20011228  644  0.7+  0.5-    20030323  673  0.2+  0.2-    20031105  621  0.2+  0.4-
20020206  644  0.4+  0.4-    20030323  673  0.2+  0.3-    20031106  621  0.3+  0.3-
20020206  644  0.5-  0.4-    20030323  673  0.1-  0.3-    20041211  621  0.3+  0.2-
20020206  644  0.1-  0.1-    20030323  673  0.3-  0.2-    20041211  621  0.2+  0.3-
20030113  644  0.2-  0.2+    20030324  673  0.2+  0.5-    20041211  290  0.1+  0.2+
20030113  644  0.2-  0.1+    20030324  673  0.1+  0.3-    20041211  290  0.2+  0.3+
20030113  644  0.2-  0.1+    20030325  673  0.1+  0.0     20060225  688  0.4-  0.2+
20030126  675  0.1+  0.1-    20030325  673  0.3+  0.2-    20060225  688  0.3-  0.3+


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


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