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: 02PA171 # Created Sat Apr 20 01:10:52 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 18 observations of 18 # Arc: 11.17y # First observation: 2002/08/05 # Last observation: 2013/10/07 # Chi-squared of fit: 27.93 DOF: 30 RMS: 0.22 # Min/Max residuals: -0.49 0.53 # Exact a, adot, b, bdot, g, gdot: 1.358209E-05 1.872534E-02 -1.380738E-06 -6.346068E-04 2.140637E-02 -1.807679E-04 # Covariance matrix: 2.4091E-13 -7.0261E-14 -1.6651E-15 2.4913E-15 2.4950E-13 -3.7748E-13 -7.0261E-14 1.7017E-13 3.0101E-15 -5.9046E-15 8.0538E-14 8.2639E-13 -1.6651E-15 3.0101E-15 1.0625E-13 -1.3168E-14 5.6043E-18 1.5701E-14 2.4913E-15 -5.9046E-15 -1.3168E-14 7.0780E-15 -1.8874E-15 -3.0204E-14 2.4950E-13 8.0538E-14 5.6043E-18 -1.8874E-15 7.1221E-13 1.9442E-13 -3.7748E-13 8.2639E-13 1.5701E-14 -3.0204E-14 1.9442E-13 4.2493E-12 # lat0 lon0 xBary yBary zBary JD0 -1.611050 -31.137903 0.284557 -0.027556 -0.977533 2452491.956773 # Heliocentric elements and errors Epoch: 2452492.5000 = 2002/08/06 Mean Anomaly: 193.62903 +/- 0.076 Argument of Peri: 27.30923 +/- 0.068 Long of Asc Node: 109.61030 +/- 0.004 Inclination: 2.51127 +/- 0.000 Eccentricity: 0.08116799 +/- 0.0001 Semi-Major Axis: 44.19020946 +/- 0.0060 Time of Perihelion: 2502078.8980 +/- 25.4 Perihelion: 40.60337915 +/- 0.0074 Aphelion: 47.77703977 +/- 0.0081 Period (y) 293.7631 +/- 0.06 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 40.65876285 +/- 0.0016 Ecliptic Y -24.89022716 +/- 0.0010 Ecliptic Z -1.31340541 +/- 0.0001 Ecliptic XDOT 0.00120891 +/- 0.0000 Ecliptic YDOT 0.00206045 +/- 0.0000 Ecliptic ZDOT -0.00008027 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 47.69050775 +/- 0.0014 Geocenter to KBO 46.71511107 +/- 0.0018 # Hcoef: 6.75
The following table shows the complete astrometric record for 02PA171. 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 (02PA171) followed by the observatory code and reference code for the source of the astrometry.
2002 08 05.45603 22 06 18.47 -13 22 47.0 23.1R 02PA171 568 Cp2010 2002 08 05.51978 22 06 18.22 -13 22 48.4 23.0R 02PA171 568 Cp2010 2002 08 05.58203 22 06 17.97 -13 22 49.7 23.2R 02PA171 568 Cp2010 2002 08 09.44155 22 06 02.61 -13 24 17.0 02PA171 568 Cp2010 2002 09 05.94351 22 04 09.97 -13 34 37.5 02PA171 493 Cp2010 2002 09 06.02081 22 04 09.69 -13 34 39.5 02PA171 493 Cp2010 2002 09 07.04631 22 04 05.58 -13 35 01.1 02PA171 493 Cp2010 2002 09 30.27614 22 02 42.42 -13 42 14.1 23.3R 02PA171 568 Cp2010 2002 09 30.33141 22 02 42.24 -13 42 15.0 23.3R 02PA171 568 Cp2010 2002 09 30.39322 22 02 42.07 -13 42 15.6 23.5R 02PA171 568 Cp2010 2003 07 29.16576 22 10 57.10 -12 59 27.3 02PA171 809 Cp2010 2003 07 29.25858 22 10 56.76 -12 59 29.4 02PA171 809 Cp2010 2004 09 11.23045 22 12 07.47 -12 55 36.1 02PA171 695 Cp2010 2004 09 11.28885 22 12 07.23 -12 55 37.4 02PA171 695 Cp2010 2004 09 16.14320 22 11 48.68 -12 57 17.8 02PA171 675 Cp2010 2004 09 16.17111 22 11 48.59 -12 57 18.2 02PA171 675 Cp2010 2013 10 06.28721 22 47 51.87 -09 46 53.0 23.0R 02PA171 695 C~0zdL 2013 10 07.19455 22 47 48.94 -09 47 10.0 02PA171 695 C~0zdL
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 -0.02 0.00 0.19
2 0.0002 0.00 0.07 0.00 0.22
3 0.0003 0.00 0.05 0.00 0.31
4 0.0109 0.00 -0.13 0.00 0.21
5 0.0862 0.00 -0.26 0.00 -0.14
6 0.0864 0.00 0.24 0.00 -0.49
7 0.0892 0.00 -0.16 0.00 -0.24
8 0.1528 0.00 -0.07 0.00 0.21
9 0.1530 0.00 -0.16 0.00 0.17
10 0.1531 0.00 0.21 0.00 0.53
11 0.9794 0.00 -0.03 0.00 -0.10
12 0.9796 0.00 0.07 0.00 -0.19
13 2.1021 0.00 0.17 0.00 -0.20
14 2.1022 0.00 0.04 0.00 -0.26
15 2.1155 0.00 -0.04 0.00 -0.27
16 2.1156 0.00 0.20 0.00 -0.10
17 11.1700 0.00 -0.35 0.00 0.18
18 11.1725 0.00 0.29 0.00 0.00
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.
02PA171 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.502 44.502 44.502 ecceobj 0.074 0.074 0.074 incobj 2.509 2.509 2.509 qmin 39.923 39.923 39.923 qmax 49.089 49.088 49.088 amean 44.403 44.403 44.403 amin 44.045 44.047 44.044 amax 44.777 44.778 44.777 emean 0.081 0.081 0.081 emin 0.065 0.065 0.065 emax 0.096 0.096 0.096 imean 1.131 1.131 1.131 imin 0.394 0.394 0.394 imax 1.747 1.747 1.747 excite_mean 0.084 0.084 0.084 fracstop 1.000 1.000 1.000 cjmean 3.098 3.098 3.098 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 190.7 190.7 190.7 kozaiamp 180.0 179.9 180.0