Apollo asteroid: 1999 GT3

Actually measured positions:

     J99G03T  C2001 06 19.97264 15 09 49.03 +11 57 19.4          21.8 V      493
     J99G03T  C2001 06 19.97609 15 09 48.77 +11 57 18.2                      493
     J99G03T  C2001 06 20.00527 15 09 46.64 +11 57 10.1                      493
     J99G03T  C2001 06 20.00866 15 09 46.37 +11 57 09.0                      493
Note: each position is measured using 2 stacked images. The magnitude is measured using 8 stacked images.

Attention: This recovery is not complete, because a second night of observations could not beobtained and we do not meet the MPC's criteria. A second night is wanted. Please verify this "uncertain" recovery using the orbital elements as follows:

J99G03T 18.20  0.15 K01AI 269.81088  260.60711  157.88816   19.52540  0.8377596  0.63980173   1.3338463    Gnadig

1999 GT3
Epoch 2001 Oct. 18.0 TT = JDT 2452200.5                 Gnadig
Id. DANEOPS (2001 observations)
M 269.81088              (2000.0)            P               Q
n   0.63980173     Peri.  260.60711     +0.50121277     -0.85612981
a   1.3338463      Node   157.88816     +0.86518161     +0.49316753
e   0.8377596      Incl.   19.52540     +0.01570152     +0.15436171
P   1.54           H   18.2           G   0.15           U   5
Residuals in seconds of arc
J9949  704  0.7+  0.5-    J994A  704  1.9+  1.1-    J994C  704  1.4-  0.7-
J9949  704 (2.0+  0.6+)   J994A  704  1.4+  0.5-    J994C  704  1.3-  0.0
J9949  704  1.5-  0.4-    J994A  704  1.6+  1.6+    J994C  422  0.0   0.4-
J9949  704  0.3-  0.2+    J994A  704  1.8+  1.3-    J994C  422  0.8-  0.1+
J9949  611  0.3+  1.0+    J994A  704  0.8+  0.6+    J994C  422  0.7+  0.2-
J9949  611  0.1+  0.3+    J994A  557  1.3-  0.0     J994C  422  0.1-  0.0
J9949  611  0.2+  0.2-    J994A  557  0.2-  0.4-    J994F  118  0.4-  0.2-
J994A  046  0.7-  0.1-    J994A  557  1.2+  0.5-    J994F  118  0.1+  0.3-
J994A  046  1.7-  0.7+    J994B  859  1.0+  0.7+    J994F  118  0.3+  0.2+
J994A  046  0.3-  0.9+    J994B  859  0.1-  0.3+    J994I  422  0.3-  1.3-
J994A  046  1.1-  0.5+    J994B  859  0.2+  0.2+    J994J  118  0.5-  0.8-
J994A  046  1.6-  0.2-    J994B  422  0.4-  0.3-    J994J  118  0.2+  0.8-
J994A  046  0.7-  0.3-    J994B  422  0.3+  0.5-    J994J  118  0.2-  0.8-
J994A  118  0.2-  0.3+    J994B  422  0.3-  0.1+    J994M  658  0.3+  0.2-
J994A  118  0.3+  0.1+    J994B  422  0.5-  0.1-    J994M  658  0.7+  0.1-
J994A  118  1.7+  0.6+    J994C  704  0.0   0.8+    J994M  658  0.7+  0.1+
J994A  557  0.5-  0.1+    J994C  704  1.4+  0.4+    J9955  658  1.5-  0.3+
J994A  557  0.3-  0.0     J994C  704  0.7+  1.0+    J9955  658  0.3+  0.6+
J994A  557  0.5-  0.0     J994C  704  0.1+  0.4-    J9955  658  0.2+  0.8+
J994A  704  0.0   0.5-    J994C  704  0.2-  0.3+    K016J  493  0.0   0.0
J994A  704  0.3-  0.6-    J994C  704  0.2-  0.9-    K016J  493  0.1-  0.2-
J994A  704  0.8-  0.7+    J994C  704 (2.2-  3.6-)   K016K  493  0.2+  0.2+
J994A  704  1.2+  1.5+    J994C  704  0.2-  1.4-    K016K  493  0.1-  0.1+

Images:


composite of 4 images
4*126 s = 504 s exposured at 20010619 - 232036 UT

composite of 4 images
4*126 s = 504 s exposured at 20010620 - 000735 UT

left: composite of all 8 images
8*126 s = 1008 s exposured at 20010619 - 232036 UT
this composite are used to measure the magnitude



With an additional night's observation on Sep 20, by D.J. Tholen, our recovery of this object was confirmed, and on this MPEC the improved orbit was published.