(444030) 2004 NT33 Precovery Images

(444030) 2004 NT33 Precovery Images


The original elements for 2004 NT33 were based on four oppositions from 2004-2008. A DSS image from 1995 was 26" from the predicted position. After correcting the orbit, five additional images were found back to 1982.

2004 NT33 was crossing the summer Milky Way during the 1980s and 1990s, and as shown below, there were many stars in the vicinity of the TNO's images. Fortunately, in each case a reliable measurement could be made. In the 1987 image below, 2004 NT33 was crossing a dust cloud and nearly all of the background stars were obscured.

The following astrometry was submitted to the Minor Planet Center:

     K04N33T   1982 08 10.46590 17 59 13.41 -06 15 39.2                      260
     K04N33T   1984 08 01.48248 18 12 20.69 -04 37 38.9                      260
     K04N33T   1987 07 31.53639 18 31 17.03 -02 10 37.5                      260
     K04N33T   1988 05 22.41875 18 43 19.84 -01 27 03.1                      261
     K04N33T   1990 08 19.19271 18 48 39.00 +00 10 35.9                      261
     K04N33T   1995 08 16.19132 19 19 46.75 +04 15 27.2                      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 26 years instead of four years. 2004 NT33 was numbered on 2015-09-28.

View the Discovery Announcement.


1995 Aug. 16.19132 UTC

RA 19h19m46.75s Dec. +0415'27.2"

53-minute exposure

Size = 150" x 150"

Palomar Mountain-DSS plate XJ809-A17E

1990 Aug. 19.19271 UTC

RA 18h48m39.00s Dec. +0010'35.9"

65-minute exposure

Size = 150" x 150"

Palomar Mountain-DSS plate XP879-A0B0

1988 May 22.41875 UTC

RA 18h43m19.84s Dec. -0127'03.1"

50-minute exposure

Size = 150" x 150"

Palomar Mountain-DSS plate XJ879-A017

1987 July 31.53639 UTC

RA 18h31m17.03s Dec. -0210'37.5"

70-minute exposure

Size = 150" x 150"

Siding Spring Observatory-DSS plate ER807-A0GC

1984 Aug. 01.48248 UTC

RA 18h12m20.69s Dec. -0437'38.9"

50-minute exposure

Size = 150" x 150"

Siding Spring Observatory-DSS plate ER805-A0K7

1982 Aug. 10.46590 UTC

RA 17h59m13.41s Dec. -0615'39.2"

55-minute exposure

Size = 255" x 255"

Siding Spring Observatory-DSS plate S805-03UR


Original elements and residuals from the Minor Planet Center

2004 NT33

Epoch 2009 June 18.0 TT = JDT 2455000.5                 MPC
M  29.78575              (2000.0)            P               Q
n   0.00340544     Peri.   39.00400     +0.09371242     +0.88642680             T = 2446253.98566 JDT
a  43.7542647      Node   240.98291     -0.99278193     +0.04897298             q =    36.9267457
e   0.1560424      Incl.   31.22155     -0.07484663     +0.46027077
P 289              H    4.4           G   0.15           U   4
From 18 observations at 4 oppositions, 2004-2008, mean residual 0".41.
  
Residuals
20040713  644  0.0   0.3-    20050704  644  0.2+  0.5+    20080626  F65  0.1+  0.3-
20040713  644  0.2-  0.2+    20050704  644  0.3+  0.3+    20080626  F65  0.2-  0.6-
20040713  644  0.2-  0.2+    20050729  644  0.1+  0.0     20080908  A74  0.6+  0.7+
20050703  644  0.2-  0.2+    20050730  644 (0.4-  1.7-)   20080908  A74  0.0   0.7+
20050703  644  0.1-  0.1+    20060914  644  0.0   0.8-    20080908  A74  0.6-  0.4+
20050703  644  0.2-  0.1+    20060915  644  0.3+  0.8-
20050704  644  0.2+  0.4+    20060916  644  0.1+  1.0-


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

2004 NT33

Epoch 2009 June 18.0 TT = JDT 2455000.5                 MPC
M  29.53278              (2000.0)            P               Q
n   0.00340555     Peri.   39.38216     +0.09950954     +0.88580495             T = 2446328.54979 JDT
a  43.7533170      Node   240.97965     -0.99244177     +0.05547871             q =    36.9513232
e   0.1554624      Incl.   31.22112     -0.07181361     +0.46072953
P 289              H    4.4           G   0.15           U   2
From 24 observations at 10 oppositions, 1982-2008, mean residual 0".42.
  
Residuals
19820810  413  0.2+  0.3+    20050703  644  0.0   0.1+    20060915  644  0.4+  0.6-
19840801  413  0.2-  0.3-    20050703  644  0.1+  0.1+    20060916  644  0.2+  0.9-
19870731  413  0.1-  0.0     20050703  644  0.0   0.0     20080626  F65  0.0   0.1-
19880522  675  0.1+  0.3+    20050704  644  0.5+  0.4+    20080626  F65  0.3-  0.4-
19900819  675  0.2-  0.2-    20050704  644  0.4+  0.4+    20080908  A74  0.4+  0.9+
19950816  675  0.4+  0.3+    20050704  644  0.5+  0.3+    20080908  A74  0.2-  0.9+
20040713  644  0.4-  0.8-    20050729  644  0.2+  0.1-    20080908  A74  0.8-  0.6+
20040713  644  0.6-  0.3-    20050730  644 (0.3-  1.7-)
20040713  644  0.6-  0.2-    20060914  644  0.1+  0.7-


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


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