The following information shows the result of the orbit fit based on Gary Bernstein's method. Most of the information should be self-explanatory. Take special note that while the original Bernstein software works with barycentric coordinates, we convert these results into a heliocentric coordinate system.
# Object: 307251
# Created Sun Dec 22 02:07:01 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 66 observations of 67
# Arc: 12.99y
# First observation: 2002/05/17
# Last observation: 2015/05/15
# Chi-squared of fit: 222.57 DOF: 126 RMS: 0.32
# Min/Max residuals: -1.20 0.81
# Exact a, adot, b, bdot, g, gdot:
1.508064E-05 2.722251E-02 -3.772046E-06 -4.636518E-03 2.595060E-02 3.657591E-03
# Covariance matrix:
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
# lat0 lon0 xBary yBary zBary JD0
1.409081 -128.278244 -0.081246 0.024821 -1.012502 2452411.761343
# Heliocentric elements and errors
Epoch: 2452412.5000 = 2002/05/18
Mean Anomaly: 33.99175 +/- 0.000
Argument of Peri: 121.81452 +/- 0.000
Long of Asc Node: 59.82974 +/- 0.000
Inclination: 9.77872 +/- 0.000
Eccentricity: 0.20184428 +/- 0.0000
Semi-Major Axis: 46.56218593 +/- 0.0000
Time of Perihelion: 2441454.7963 +/- 0.0
Perihelion: 37.16387512 +/- 0.0000
Aphelion: 55.96049675 +/- 0.0000
Period (y) 317.7300 +/- 0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -24.42712268 +/- 0.0000
Ecliptic Y -31.08139968 +/- 0.0000
Ecliptic Z 0.94748061 +/- 0.0000
Ecliptic XDOT 0.00199997 +/- 0.0000
Ecliptic YDOT -0.00209329 +/- 0.0000
Ecliptic ZDOT -0.00047931 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 39.54274218 +/- 0.0000
Geocenter to KBO 38.53470123 +/- 0.0000
# Hcoef: 5.33
The following table shows the complete astrometric record for 307251. The first three columns show the date of observation. The next six columns are RA and DEC. The next column (when provided) is the observed magnitude and filter. The next column is the object name (307251) followed by the observatory code and reference code for the source of the astrometry.
2002 05 17.26060 15 18 43.836 -16 50 03.26 307251 675 Cf9011 2002 05 17.33257 15 18 43.456 -16 50 02.52 307251 675 Cf9011 2002 05 17.39780 15 18 43.111 -16 50 00.59 307251 675 Cf9011 2002 05 31.17405 15 17 34.08 -16 46 19.5 21.5R 307251 644 Cl2692 2002 06 13.24701 15 16 34.156 -16 43 15.05 21.3R 307251 675 Cf9011 2002 06 13.30038 15 16 33.951 -16 43 14.69 307251 675 Cf9011 2002 06 13.36249 15 16 33.659 -16 43 13.58 21.5R 307251 675 Cf9011 2002 06 14.30061 15 16 29.683 -16 43 01.80 21.2R 307251 675 Cf9011 2002 06 16.22389 15 16 21.68 -16 42 38.5 21.5R 307251 644 Cl2692 2002 06 25.21127 15 15 47.33 -16 41 01.4 21. R 307251 644 Cl2692 2002 06 26.22997 15 15 43.85 -16 40 52.4 21.5R 307251 644 Cl2692 2003 04 25.31162 15 26 36.19 -17 35 00.5 20.5R 307251 675 Ci1476 2003 04 25.35647 15 26 35.98 -17 35 00.0 20.5R 307251 675 Ci1476 2003 05 31.18714 15 23 34.85 -17 25 27.3 20.5R 307251 675 Ci1476 2003 05 31.23053 15 23 34.64 -17 25 27.0 20.7R 307251 675 Ci1476 2003 05 31.28280 15 23 34.36 -17 25 26.2 20.5R 307251 675 Ci1476 2004 05 20.25174 15 30 26.56 -18 06 12.4 19.7R 307251 688 Ck8098 2004 05 20.32591 15 30 26.16 -18 06 10.2 307251 688 Ck8098 2004 05 26.18450 15 29 56.22 -18 04 40.3 20.7R 307251 304 Ck8672 2004 05 26.21650 15 29 56.06 -18 04 39.8 307251 304 Ck8672 2005 03 10.49434 15 41 02.79 -18 56 14.2 307251 G96 Cq1743 2005 04 11.44605 15 39 34.82 -18 52 18.6 307251 G96 Cq1743 2005 05 13.34219 15 37 04.19 -18 45 05.1 307251 G96 Cq1743 2006 05 03.41979 15 43 56.61 -19 23 28.7 22.0R 307251 250 S~06AV 2006 05 03.42418 15 43 56.58 -19 23 28.6 307251 250 S~06AV 2006 05 03.42858 15 43 56.56 -19 23 28.6 307251 250 S~06AV 2006 05 03.43298 15 43 56.54 -19 23 28.5 307251 250 S~06AV 2009 06 23.23163 15 57 42.16 -20 55 04.1 307251 688 C~07bx 2009 06 23.29375 15 57 41.87 -20 55 03.3 307251 688 C~07bx 2009 09 16.01828 15 56 34.000 -20 54 25.35 307251 809 C~0FlN 2009 09 16.02065 15 56 34.016 -20 54 25.32 307251 809 C~0FlN 2009 09 16.02475 15 56 34.001 -20 54 25.77 307251 809 C~0FlN 2009 09 16.02975 15 56 34.041 -20 54 25.80 307251 809 C~0FlN 2009 09 16.03311 15 56 34.022 -20 54 25.97 307251 809 C~0FlN 2009 09 17.00111 15 56 37.227 -20 54 36.95 307251 809 C~0FlN 2009 09 17.00753 15 56 37.282 -20 54 37.04 307251 809 C~0FlN 2009 09 17.04245 15 56 37.390 -20 54 37.24 307251 809 C~0FlN 2009 09 18.00821 15 56 40.689 -20 54 48.65 307251 809 C~0FlN 2009 09 19.01046 15 56 44.196 -20 55 00.55 307251 809 C~0FlN 2009 09 19.01807 15 56 44.223 -20 55 00.56 307251 809 C~0FlN 2009 09 19.02306 15 56 44.249 -20 55 00.79 307251 809 C~0FlN 2011 06 07.40546 16 10 55.164 -22 01 19.30 21.3w 307251 F51 C~1vxB 2011 06 07.41961 16 10 55.103 -22 01 19.22 21.4w 307251 F51 C~1vxB 2011 06 07.43380 16 10 55.020 -22 01 18.96 21.3w 307251 F51 C~1vxB 2013 06 12.37446 16 22 20.835 -22 59 20.63 21.7w 307251 F51 C~1vxB 2013 06 12.38534 16 22 20.778 -22 59 20.63 21.7w 307251 F51 C~1vxB 2013 06 12.39620 16 22 20.717 -22 59 20.37 21.6w 307251 F51 C~1vxB 2013 06 12.40703 16 22 20.669 -22 59 20.76 21.9w 307251 F51 C~1vxB 2014 05 03.48158 16 31 40.142 -23 32 36.79 21.8w 307251 F51 C~1vxB 2014 05 03.49238 16 31 40.032 -23 32 36.57 21.9w 307251 F51 C~1vxC 2014 05 03.50313 16 31 40.002 -23 32 36.64 21.6w 307251 F51 C~1vxC 2014 05 21.44005 16 30 12.059 -23 30 29.54 21.6w 307251 F51 C~1vxC 2014 05 21.45317 16 30 11.995 -23 30 29.46 21.6w 307251 F51 C~1vxC 2014 05 21.46623 16 30 11.922 -23 30 29.10 21.7w 307251 F51 C~1vxC 2014 05 21.47932 16 30 11.856 -23 30 29.06 21.6w 307251 F51 C~1vxC 2014 05 28.43213 16 29 35.655 -23 29 30.89 21.6w 307251 F51 C~1vxC 2014 05 28.44274 16 29 35.602 -23 29 30.83 21.5w 307251 F51 C~1vxC 2014 05 28.45336 16 29 35.553 -23 29 30.76 21.4w 307251 F51 C~1vxC 2014 05 28.46397 16 29 35.485 -23 29 30.66 21.8w 307251 F51 C~1vxC 2014 06 18.38352 16 27 48.005 -23 26 22.80 21.0i 307251 F51 C~1vxC 2014 06 18.39612 16 27 47.938 -23 26 23.07 21.0i 307251 F51 C~1vxC 2014 06 18.40870 16 27 47.871 -23 26 22.68 20.8i 307251 F51 C~1vxC 2014 06 18.42127 16 27 47.798 -23 26 22.66 21.2i 307251 F51 C~1vxC 2015 05 15.48214 16 36 39.340 -23 57 46.18 21.9w 307251 F51 C~1vxC 2015 05 15.49309 16 36 39.267 -23 57 46.26 22.3w 307251 F51 C~1vxC 2015 05 15.50403 16 36 39.233 -23 57 46.16 22.2w 307251 F51 C~1vxC 2015 05 15.51495 16 36 39.184 -23 57 46.09 21.8w 307251 F51 C~1vxC
The following table shows the residuals to the orbit fit. The first coumn is the point number. The second column is the time, in years, measured from the first observation. The third and fifth columns are the regularized positions used in the orbit fit. The fourth and sixth columns are the residuals, in arc seconds, for RA and Dec respectively.
1 0.0000 0.00 0.37 0.00 0.11
2 0.0002 0.00 0.30 0.00 -0.36
3 0.0004 0.00 0.22 0.00 0.47
4 0.0381 0.00 0.62 0.00 -0.35
5 0.0739 0.00 0.15 0.00 0.22
6 0.0740 0.00 0.56 0.00 -0.10
7 0.0742 0.00 0.21 0.00 0.21
8 0.0768 0.00 0.15 0.00 0.22
9 0.0820 0.00 -0.08 0.00 0.06
10 0.1066 0.00 -0.84 0.00 0.52
11 0.1094 0.00 0.16 0.00 0.01
12 0.9392 0.00 -0.44 0.00 -0.22
13 0.9393 0.00 -0.30 0.00 -0.41
14 1.0374 0.00 -0.33 0.00 0.34
15 1.0376 0.00 -0.24 0.00 -0.00
16 1.0377 0.00 -0.52 0.00 0.02
17 2.0096 0.00 0.24 0.00 -1.20
18 2.0098 0.00 0.05 0.00 -0.15
19 2.0258 0.00 -0.29 0.00 -0.15
20 2.0259 0.00 -0.22 0.00 -0.13
21 2.8152 0.00 -0.76 0.00 -1.15
22 2.9026 0.00 ( -3.76) 0.00 ( 0.96)
23 2.9900 0.00 -0.43 0.00 0.20
24 3.9621 0.00 0.61 0.00 0.77
25 3.9621 0.00 0.48 0.00 0.81
26 3.9621 0.00 0.51 0.00 0.75
27 3.9621 0.00 0.54 0.00 0.79
28 7.1019 0.00 0.09 0.00 -0.18
29 7.1021 0.00 -0.15 0.00 -0.02
30 7.3340 0.00 0.20 0.00 0.02
31 7.3340 0.00 0.32 0.00 0.08
32 7.3341 0.00 -0.10 0.00 -0.33
33 7.3341 0.00 0.26 0.00 -0.30
34 7.3341 0.00 -0.19 0.00 -0.43
35 7.3367 0.00 -0.36 0.00 -0.29
36 7.3367 0.00 0.15 0.00 -0.31
37 7.3368 0.00 0.03 0.00 -0.11
38 7.3395 0.00 0.02 0.00 -0.16
39 7.3422 0.00 -0.06 0.00 -0.02
40 7.3423 0.00 -0.06 0.00 0.06
41 7.3423 0.00 0.07 0.00 -0.11
42 9.0572 0.00 -0.23 0.00 0.04
43 9.0572 0.00 -0.04 0.00 -0.03
44 9.0573 0.00 -0.18 0.00 0.07
45 11.0722 0.00 0.08 0.00 0.13
46 11.0722 0.00 0.06 0.00 0.02
47 11.0722 0.00 -0.01 0.00 0.18
48 11.0723 0.00 0.10 0.00 -0.32
49 11.9623 0.00 0.21 0.00 -0.07
50 11.9623 0.00 -0.69 0.00 0.09
51 11.9623 0.00 -0.39 0.00 -0.05
52 12.0114 0.00 -0.01 0.00 -0.06
53 12.0115 0.00 0.07 0.00 -0.08
54 12.0115 0.00 0.00 0.00 0.17
55 12.0116 0.00 0.04 0.00 0.11
56 12.0306 0.00 -0.13 0.00 0.15
57 12.0306 0.00 -0.08 0.00 0.12
58 12.0306 0.00 0.04 0.00 0.10
59 12.0307 0.00 -0.14 0.00 0.10
60 12.0879 0.00 0.29 0.00 0.16
61 12.0880 0.00 0.23 0.00 -0.23
62 12.0880 0.00 0.17 0.00 0.05
63 12.0881 0.00 0.02 0.00 -0.05
64 12.9944 0.00 0.16 0.00 0.12
65 12.9945 0.00 -0.11 0.00 -0.03
66 12.9945 0.00 0.21 0.00 -0.01
67 12.9945 0.00 0.31 0.00 -0.01
The following table comes from a 10My integration of the orbit of the object. Three columns are shown. The first column is the result of integrating the nominal orbit. The other two columns are based on clones of the nominal orbit that are +/- 3 sigma from the nominal orbit. If all three types agree then the classificiation is deemed secure. The basis for these calculations is described in more detail in AJ, 129, 1117 (2005). Any use made of these calculations should refer to and credit this publication and the Deep Ecliptic Survey Team.
307251 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 46.352 46.352 46.352 ecceobj 0.197 0.197 0.197 incobj 9.788 9.788 9.788 qmin 36.472 36.475 36.526 qmax 57.446 57.447 57.488 amean 46.750 46.748 46.748 amin 46.332 46.331 46.322 amax 47.252 47.249 47.256 emean 0.202 0.202 0.202 emin 0.188 0.188 0.188 emax 0.217 0.217 0.217 imean 8.491 8.491 8.490 imin 7.738 7.738 7.738 imax 9.338 9.330 9.330 excite_mean 0.250 0.250 0.250 fracstop 1.000 1.000 1.000 cjmean 3.058 3.058 3.058 libcent 0 -180.0 -180.0 -180.0 libamp 0 -180.0 -180.0 -180.0 libcent 1 -180.0 -180.0 -180.0 libamp 1 -180.0 -180.0 -180.0 libcent 2 -180.0 -180.0 -180.0 libamp 2 -180.0 -180.0 -180.0 libcent 3 -180.0 -180.0 -180.0 libamp 3 -180.0 -180.0 -180.0 libcent 4 -180.0 -180.0 -180.0 libamp 4 -180.0 -180.0 -180.0 kozaimean 180.4 180.5 180.5 kozaiamp 180.0 179.9 180.0