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: 24978
# Created Fri Nov 22 02:06:43 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 30 observations of 30
# Arc: 9.04y
# First observation: 1998/04/28
# Last observation: 2007/05/12
# Chi-squared of fit: 42.08 DOF: 54 RMS: 0.21
# Min/Max residuals: -0.49 0.42
# Exact a, adot, b, bdot, g, gdot:
1.656949E-05 2.399247E-02 1.093906E-06 -1.003127E-03 2.439531E-02 1.035454E-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
0.016781 -129.666921 0.222478 0.000052 -0.987094 2450931.999271
# Heliocentric elements and errors
Epoch: 2450932.5000 = 1998/04/29
Mean Anomaly: 48.58864 +/- 0.000
Argument of Peri: 126.96768 +/- 0.000
Long of Asc Node: 50.43470 +/- 0.000
Inclination: 2.39907 +/- 0.000
Eccentricity: 0.04541507 +/- 0.0000
Semi-Major Axis: 43.22180220 +/- 0.0000
Time of Perihelion: 2436924.2136 +/- 0.0
Perihelion: 41.25888111 +/- 0.0000
Aphelion: 45.18472330 +/- 0.0000
Period (y) 284.1597 +/- 0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -26.95839960 +/- 0.0000
Ecliptic Y -32.17473098 +/- 0.0000
Ecliptic Z 0.01207789 +/- 0.0000
Ecliptic XDOT 0.00200046 +/- 0.0000
Ecliptic YDOT -0.00179952 +/- 0.0000
Ecliptic ZDOT -0.00011263 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 41.97578939 +/- 0.0000
Geocenter to KBO 40.99149569 +/- 0.0000
# Hcoef: 7.28
The following table shows the complete astrometric record for 24978. 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 (24978) followed by the observatory code and reference code for the source of the astrometry.
1998 04 28.49854 15 11 35.21 -17 48 50.3 23.4R 24978 568 Ca4825 1998 04 28.53791 15 11 35.03 -17 48 49.5 23.4R 24978 568 Ca4825 1998 04 28.57687 15 11 34.83 -17 48 48.7 23.4R 24978 568 Ca4825 1998 05 01.52047 15 11 20.78 -17 47 54.8 23.4R 24978 568 Ca4825 1998 05 01.53208 15 11 20.73 -17 47 54.6 23.4R 24978 568 Ca4825 1998 05 24.37367 15 09 30.24 -17 40 48.5 23.4R 24978 568 Ca4825 1998 05 24.38186 15 09 30.18 -17 40 48.4 23.4R 24978 568 Ca4825 1998 06 29.38069 15 07 07.59 -17 31 36.0 23.4R 24978 568 Ca4825 1998 06 29.44553 15 07 07.38 -17 31 35.2 23.4R 24978 568 Ca4825 1999 03 14.60617 15 19 49.26 -18 23 43.4 23.5R 24978 568 Ca4825 1999 03 15.58627 15 19 47.20 -18 23 36.5 23.5R 24978 568 Ca4825 1999 04 08.55344 15 18 33.42 -18 19 12.1 23.4R 24978 568 Ca4825 1999 04 08.57589 15 18 33.32 -18 19 11.7 23.4R 24978 568 Ca4825 2000 06 28.95950 15 18 01.17 -18 21 28.4 24978 950 Cb6395 2000 06 28.98484 15 18 01.08 -18 21 28.1 24978 950 Cb6395 2000 06 29.01062 15 18 00.99 -18 21 28.1 24978 950 Cb6395 2001 04 29.43365 15 28 01.40 -19 01 25.2 22.5R 24978 695 Cd0712 2001 04 29.46064 15 28 01.27 -19 01 24.8 24978 695 Cd0712 2001 05 21.45933 15 26 14.01 -18 55 11.6 24978 568 Cd2696 2001 05 21.50862 15 26 13.77 -18 55 10.8 24978 568 Cd2696 2001 08 18.98693 15 22 33.88 -18 42 21.0 21.8R 24978 807 Ch2574 2001 08 19.98520 15 22 35.13 -18 42 26.0 24978 807 Ch2574 2001 08 20.99251 15 22 36.57 -18 42 31.7 24978 807 Ch2574 2003 06 01.20599 15 36 30.10 -19 38 16.6 22.2R 24978 807 i2184 2003 06 02.14031 15 36 25.64 -19 38 01.9 24978 807 i2184 2003 06 02.20299 15 36 25.35 -19 38 01.2 24978 807 i2184 2007 05 12.31003 16 00 35.04 -21 06 41.5 23.1R 24978 250 S~06E5 2007 05 12.31767 16 00 35.01 -21 06 41.4 24978 250 S~06E5 2007 05 12.37392 16 00 34.73 -21 06 40.6 24978 250 S~06E5 2007 05 12.38087 16 00 34.69 -21 06 40.5 24978 250 S~06E5
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 -0.31 0.00 -0.29
2 0.0001 0.00 -0.16 0.00 -0.21
3 0.0002 0.00 -0.34 0.00 -0.13
4 0.0083 0.00 -0.11 0.00 -0.14
5 0.0083 0.00 -0.01 0.00 -0.16
6 0.0708 0.00 0.08 0.00 -0.11
7 0.0709 0.00 -0.23 0.00 -0.16
8 0.1694 0.00 0.22 0.00 -0.18
9 0.1696 0.00 -0.05 0.00 -0.12
10 0.8764 0.00 0.13 0.00 0.02
11 0.8791 0.00 0.04 0.00 -0.21
12 0.9447 0.00 0.16 0.00 -0.06
13 0.9448 0.00 -0.00 0.00 0.02
14 2.1696 0.00 0.42 0.00 0.24
15 2.1697 0.00 0.29 0.00 0.25
16 2.1698 0.00 0.17 0.00 -0.05
17 3.0032 0.00 0.12 0.00 0.21
18 3.0033 0.00 0.11 0.00 0.16
19 3.0635 0.00 -0.02 0.00 0.29
20 3.0637 0.00 0.06 0.00 0.23
21 3.3087 0.00 0.16 0.00 0.30
22 3.3114 0.00 -0.49 0.00 0.40
23 3.3142 0.00 0.09 0.00 0.21
24 5.0916 0.00 0.09 0.00 0.20
25 5.0942 0.00 -0.10 0.00 0.26
26 5.0943 0.00 0.10 0.00 -0.02
27 9.0371 0.00 -0.05 0.00 -0.38
28 9.0372 0.00 0.06 0.00 -0.38
29 9.0373 0.00 -0.00 0.00 -0.32
30 9.0373 0.00 -0.09 0.00 -0.31
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.
24978 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.063 43.064 43.063 ecceobj 0.045 0.045 0.045 incobj 2.399 2.399 2.399 qmin 40.315 40.315 40.316 qmax 46.675 46.684 46.660 amean 43.370 43.370 43.370 amin 43.036 43.032 43.032 amax 43.716 43.716 43.716 emean 0.048 0.048 0.048 emin 0.030 0.030 0.030 emax 0.068 0.068 0.068 imean 1.451 1.451 1.451 imin 0.483 0.483 0.483 imax 2.198 2.199 2.197 excite_mean 0.055 0.055 0.055 fracstop 1.000 1.000 1.000 cjmean 3.090 3.090 3.090 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 169.6 169.5 169.5 kozaiamp 179.9 179.9 180.0