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: 04HB79
# Created Wed Mar 26 01:08:39 2025
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 25 observations of 25
# Arc: 17.20y
# First observation: 2004/04/26
# Last observation: 2021/07/09
# Chi-squared of fit: 25.34 DOF: 44 RMS: 0.18
# Min/Max residuals: -0.67 0.37
# Exact a, adot, b, bdot, g, gdot:
1.917269E-05 3.868080E-02 -7.423218E-07 -1.457598E-03 3.228575E-02 -5.501906E-03
# Covariance matrix:
2.5750E-13 -6.9882E-15 1.6404E-15 6.6129E-16 3.3146E-13 -2.5128E-14
-6.9882E-15 3.8155E-14 2.1011E-15 -1.3083E-15 1.0271E-13 3.4662E-14
1.6404E-15 2.1011E-15 1.2517E-13 -7.7373E-15 9.7515E-15 1.6340E-15
6.6129E-16 -1.3083E-15 -7.7373E-15 7.7149E-16 -1.8849E-15 -1.3447E-15
3.3146E-13 1.0271E-13 9.7515E-15 -1.8849E-15 1.1019E-12 3.1007E-14
-2.5128E-14 3.4662E-14 1.6340E-15 -1.3447E-15 3.1007E-14 3.7106E-14
# lat0 lon0 xBary yBary zBary JD0
1.588080 -152.999337 -0.167497 0.027512 -0.990145 2453121.835603
# Heliocentric elements and errors
Epoch: 2453122.5000 = 2004/04/27
Mean Anomaly: 332.93239 +/- 0.012
Argument of Peri: 187.64179 +/- 0.002
Long of Asc Node: 62.63500 +/- 0.000
Inclination: 2.65895 +/- 0.000
Eccentricity: 0.23117053 +/- 0.0000
Semi-Major Axis: 39.47987485 +/- 0.0009
Time of Perihelion: 2459935.0469 +/- 4.2
Perihelion: 30.35329128 +/- 0.0016
Aphelion: 48.60645843 +/- 0.0019
Period (y) 248.0686 +/- 0.01
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -28.39685043 +/- 0.0005
Ecliptic Y -14.65396227 +/- 0.0002
Ecliptic Z 0.85838082 +/- 0.0000
Ecliptic XDOT 0.00189870 +/- 0.0000
Ecliptic YDOT -0.00271937 +/- 0.0000
Ecliptic ZDOT -0.00013636 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 31.96656998 +/- 0.0004
Geocenter to KBO 30.97353701 +/- 0.0005
# Hcoef: 8.78
The following table shows the complete astrometric record for 04HB79. 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 (04HB79) followed by the observatory code and reference code for the source of the astrometry.
2004 04 26.33486 13 42 32.40 -08 55 20.3 23.5g 04HB79 568 C~0Uqw 2004 04 26.35977 13 42 32.25 -08 55 19.7 23.7g 04HB79 568 C~0Uqw 2004 04 26.38244 13 42 32.12 -08 55 18.7 23.7g 04HB79 568 C~0Uqw 2004 06 20.28067 13 38 40.22 -08 35 41.0 04HB79 568 C~0Uqw 2004 06 20.33343 13 38 40.12 -08 35 40.7 04HB79 568 C~0Uqw 2004 06 20.38203 13 38 40.00 -08 35 40.4 04HB79 568 C~0Uqw 2005 05 04.35414 13 50 07.86 -09 43 46.9 04HB79 568 C~0Uqw 2005 05 04.38840 13 50 07.66 -09 43 45.8 04HB79 568 C~0Uqw 2005 05 04.43238 13 50 07.42 -09 43 44.4 23.6r 04HB79 568 C~0Uqw 2005 05 05.39915 13 50 01.95 -09 43 15.4 04HB79 568 C~0Uqw 2006 06 29.27814 13 54 51.79 -10 18 08.5 24.2r 04HB79 568 C~0Uqw 2006 06 29.29108 13 54 51.76 -10 18 08.1 24.3r 04HB79 568 C~0Uqw 2006 06 30.25862 13 54 50.38 -10 18 04.6 23.8r 04HB79 568 C~0Uqw 2014 06 28.19903 15 05 56.19 -16 50 37.6 23.6R 04HB79 G37 C~16WI 2014 06 28.26004 15 05 56.01 -16 50 36.1 04HB79 G37 C~16WI 2021 07 09.12628 16 14 29.568 -21 25 53.35 23.9r 04HB79 269 C~8iQT 2021 07 09.12918 16 14 29.555 -21 25 53.34 23.3z 04HB79 269 C~8iQT 2021 07 09.13196 16 14 29.544 -21 25 53.31 23.2z 04HB79 269 C~8iQT 2021 07 09.13556 16 14 29.526 -21 25 53.26 24.8g 04HB79 269 C~8iQT 2021 07 09.13940 16 14 29.510 -21 25 53.23 24.5g 04HB79 269 C~8iQT 2021 07 09.14299 16 14 29.492 -21 25 53.17 23.8r 04HB79 269 C~8iQT 2021 07 09.14629 16 14 29.476 -21 25 53.14 23.3z 04HB79 269 C~8iQT 2021 07 09.14930 16 14 29.461 -21 25 53.13 23.3z 04HB79 269 C~8iQT 2021 07 09.15224 16 14 29.449 -21 25 53.09 23.1z 04HB79 269 C~8iQT 2021 07 09.15544 16 14 29.432 -21 25 53.03 23.7r 04HB79 269 C~8iQT
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 -0.04 0.00 0.02
2 0.0001 0.00 -0.11 0.00 -0.16
3 0.0001 0.00 -0.07 0.00 0.14
4 0.1504 0.00 0.05 0.00 0.15
5 0.1506 0.00 0.14 0.00 0.06
6 0.1507 0.00 -0.22 0.00 0.01
7 1.0213 0.00 0.04 0.00 -0.19
8 1.0214 0.00 -0.00 0.00 -0.11
9 1.0215 0.00 0.20 0.00 -0.02
10 1.0241 0.00 -0.24 0.00 0.28
11 2.1737 0.00 0.28 0.00 0.03
12 2.1737 0.00 0.14 0.00 0.37
13 2.1764 0.00 -0.01 0.00 -0.24
14 10.1707 0.00 -0.60 0.00 -0.67
15 10.1709 0.00 0.22 0.00 0.01
16 17.2013 0.00 -0.01 0.00 0.05
17 17.2014 0.00 -0.00 0.00 0.03
18 17.2014 0.00 0.03 0.00 0.03
19 17.2014 0.00 0.01 0.00 0.04
20 17.2014 0.00 0.04 0.00 0.03
21 17.2014 0.00 0.02 0.00 0.05
22 17.2014 0.00 0.01 0.00 0.05
23 17.2014 0.00 -0.00 0.00 0.02
24 17.2014 0.00 0.02 0.00 0.03
25 17.2014 0.00 -0.01 0.00 0.06
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.
04HB79 quality flag:3 Type: 3:2E 3:2E 3:2E axisobj 39.005 39.005 39.005 ecceobj 0.225 0.225 0.225 incobj 2.665 2.665 2.665 qmin 29.475 29.477 29.480 qmax 50.028 50.174 50.011 amean 39.455 39.456 39.455 amin 38.986 38.984 38.984 amax 40.026 40.025 40.006 emean 0.236 0.236 0.236 emin 0.219 0.220 0.220 emax 0.252 0.254 0.252 imean 1.447 1.439 1.453 imin 0.774 0.774 0.774 imax 2.458 2.436 2.478 excite_mean 0.237 0.237 0.237 fracstop 1.000 1.000 1.000 cjmean 2.987 2.987 2.987 libcent 0 180.2 180.2 179.8 libamp 0 87.7 87.6 86.7 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 169.7 170.1 169.4 kozaiamp 179.7 179.8 179.8