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: 99HJ12
# Created Sun Dec 22 02:08:03 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 29 observations of 29
# Arc: 15.99y
# First observation: 1999/04/18
# Last observation: 2015/04/15
# Chi-squared of fit: 94.13 DOF: 52 RMS: 0.32
# Min/Max residuals: -0.73 0.63
# Exact a, adot, b, bdot, g, gdot:
1.373047E-05 2.157662E-02 -3.718618E-06 -2.195831E-04 2.314005E-02 -7.819948E-04
# Covariance matrix:
2.4555E-13 -8.1171E-14 1.4833E-15 5.7005E-16 2.1722E-13 -1.7843E-13
-8.1171E-14 9.3075E-14 6.6777E-16 -8.9986E-16 -3.9648E-17 2.4103E-13
1.4833E-15 6.6777E-16 6.5196E-14 -5.5988E-15 3.7623E-15 2.1446E-15
5.7005E-16 -8.9986E-16 -5.5988E-15 2.0640E-15 -3.2674E-16 -2.4156E-15
2.1722E-13 -3.9648E-17 3.7623E-15 -3.2674E-16 4.0100E-13 4.0000E-14
-1.7843E-13 2.4103E-13 2.1446E-15 -2.4156E-15 4.0000E-14 6.4227E-13
# lat0 lon0 xBary yBary zBary JD0
4.610373 -140.044860 0.214790 0.079204 -0.985335 2451286.843043
# Heliocentric elements and errors
Epoch: 2451286.5000 = 1999/04/18
Mean Anomaly: 235.88634 +/- 0.081
Argument of Peri: 226.01622 +/- 0.071
Long of Asc Node: 122.59003 +/- 0.002
Inclination: 4.54245 +/- 0.000
Eccentricity: 0.05289614 +/- 0.0001
Semi-Major Axis: 42.84478466 +/- 0.0046
Time of Perihelion: 2486601.7649 +/- 25.5
Perihelion: 40.57846075 +/- 0.0051
Aphelion: 45.11110858 +/- 0.0055
Period (y) 280.4498 +/- 0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -33.90640841 +/- 0.0009
Ecliptic Y -28.13237950 +/- 0.0007
Ecliptic Z 3.47347574 +/- 0.0001
Ecliptic XDOT 0.00170606 +/- 0.0000
Ecliptic YDOT -0.00189025 +/- 0.0000
Ecliptic ZDOT -0.00003331 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 44.19437434 +/- 0.0008
Geocenter to KBO 43.21516766 +/- 0.0012
# Hcoef: 7.39
The following table shows the complete astrometric record for 99HJ12. 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 (99HJ12) followed by the observatory code and reference code for the source of the astrometry.
1999 04 18.34230 14 36 05.79 -10 25 14.5 23.6R 99HJ12 695 Ca5574 1999 04 18.42194 14 36 05.39 -10 25 13.4 99HJ12 695 Ca5574 1999 04 18.45872 14 36 05.28 -10 25 12.1 99HJ12 695 Ca5574 1999 05 21.29484 14 33 40.97 -10 13 52.6 23.4R 99HJ12 697 Cb0831 1999 05 21.33819 14 33 40.81 -10 13 51.6 23.5R 99HJ12 697 Cb0831 1999 05 23.23208 14 33 33.00 -10 13 19.0 99HJ12 697 Cb0831 1999 05 23.28294 14 33 32.74 -10 13 17.8 23.7R 99HJ12 697 Cb0831 1999 05 24.23681 14 33 28.84 -10 13 01.3 23.8R 99HJ12 697 Cb0831 1999 05 24.27640 14 33 28.67 -10 13 00.5 23.6R 99HJ12 697 Cb0831 1999 06 05.93830 14 32 40.24 -10 09 47.9 23.0R 99HJ12 950 Ca5574 1999 06 05.98205 14 32 40.07 -10 09 47.1 22.9R 99HJ12 950 Ca5574 1999 06 06.03698 14 32 39.87 -10 09 46.8 99HJ12 950 Ca5574 2000 06 07.31621 14 37 16.57 -10 32 57.8 99HJ12 568 Cb5145 2000 06 07.40621 14 37 16.25 -10 32 56.6 99HJ12 568 Cb5145 2000 06 08.38395 14 37 12.85 -10 32 44.5 99HJ12 568 Cb5145 2000 06 25.96084 14 36 21.57 -10 30 04.9 99HJ12 950 Cb6477 2000 06 25.99467 14 36 21.50 -10 30 04.3 99HJ12 950 Cb6477 2000 06 26.03763 14 36 21.38 -10 30 04.1 99HJ12 950 Cb6477 2001 03 24.42701 14 47 11.52 -11 20 26.3 23.5R 99HJ12 695 Cc7487 2001 03 24.50156 14 47 11.29 -11 20 24.6 99HJ12 695 Cc7487 2001 05 19.42791 14 43 17.94 -11 01 19.6 23.3R 99HJ12 568 Ce6450 2001 05 19.43608 14 43 17.89 -11 01 19.7 99HJ12 568 Ce6450 2001 05 19.52358 14 43 17.52 -11 01 17.9 99HJ12 568 Ce6450 2001 05 19.53175 14 43 17.49 -11 01 17.4 99HJ12 568 Ce6450 2001 05 20.45474 14 43 13.53 -11 01 01.3 99HJ12 568 Ce6450 2001 05 20.46290 14 43 13.49 -11 01 01.1 99HJ12 568 Ce6450 2015 04 15.36913 15 55 20.22 -16 07 45.9 24.2R 99HJ12 695 C~1RHL 2015 04 15.40690 15 55 20.09 -16 07 45.4 99HJ12 695 C~1RHL 2015 04 15.44534 15 55 19.93 -16 07 44.1 99HJ12 695 C~1RHL
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 0.43 0.00 0.63
2 0.0002 0.00 -0.31 0.00 -0.04
3 0.0003 0.00 0.46 0.00 0.44
4 0.0902 0.00 -0.24 0.00 -0.05
5 0.0903 0.00 0.12 0.00 0.18
6 0.0955 0.00 0.60 0.00 -0.54
7 0.0957 0.00 -0.10 0.00 -0.22
8 0.0983 0.00 -0.05 0.00 -0.13
9 0.0984 0.00 -0.13 0.00 -0.01
10 0.1330 0.00 -0.29 0.00 0.03
11 0.1332 0.00 -0.48 0.00 0.25
12 0.1333 0.00 -0.51 0.00 -0.17
13 1.1389 0.00 0.44 0.00 -0.73
14 1.1391 0.00 0.47 0.00 -0.67
15 1.1418 0.00 0.35 0.00 -0.72
16 1.1899 0.00 -0.05 0.00 -0.03
17 1.1900 0.00 0.12 0.00 0.38
18 1.1901 0.00 -0.14 0.00 0.33
19 1.9332 0.00 -0.10 0.00 0.00
20 1.9334 0.00 0.13 0.00 0.28
21 2.0865 0.00 -0.08 0.00 0.15
22 2.0865 0.00 -0.29 0.00 -0.09
23 2.0867 0.00 -0.09 0.00 0.11
24 2.0868 0.00 -0.01 0.00 0.47
25 2.0893 0.00 0.02 0.00 0.01
26 2.0893 0.00 -0.04 0.00 0.07
27 15.9919 0.00 -0.02 0.00 -0.24
28 15.9920 0.00 0.14 0.00 -0.27
29 15.9921 0.00 -0.11 0.00 0.48
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.
99HJ12 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 42.814 42.814 42.814 ecceobj 0.052 0.052 0.052 incobj 4.543 4.543 4.543 qmin 39.642 39.663 39.707 qmax 46.819 46.780 46.734 amean 43.122 43.133 43.130 amin 42.781 42.791 42.787 amax 43.482 43.490 43.489 emean 0.058 0.058 0.058 emin 0.035 0.037 0.036 emax 0.077 0.076 0.075 imean 3.554 3.562 3.558 imin 2.476 2.476 2.477 imax 4.589 4.594 4.594 excite_mean 0.085 0.086 0.085 fracstop 1.000 1.000 1.000 cjmean 3.082 3.082 3.082 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 180.1 179.6 179.9 kozaiamp 180.0 180.0 180.0