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: 02PU170 # Created Sat Apr 20 01:10:51 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 28 observations of 28 # Arc: 21.09y # First observation: 2002/08/05 # Last observation: 2023/09/06 # Chi-squared of fit: 102.88 DOF: 50 RMS: 0.34 # Min/Max residuals: -0.56 0.86 # Exact a, adot, b, bdot, g, gdot: 1.214266E-05 1.944985E-02 -3.086697E-06 6.504348E-04 2.164602E-02 -4.314295E-03 # Covariance matrix: 1.2441E-13 -2.2320E-14 9.6993E-16 -6.2844E-16 6.7254E-14 -4.0276E-14 -2.2320E-14 1.2383E-14 -6.1345E-16 3.9525E-16 2.6346E-15 2.5205E-14 9.6993E-16 -6.1345E-16 7.7652E-14 -5.1251E-15 3.0351E-17 -1.3523E-15 -6.2844E-16 3.9525E-16 -5.1251E-15 9.1155E-16 -3.1449E-17 8.7169E-16 6.7254E-14 2.6346E-15 3.0351E-17 -3.1449E-17 2.4225E-13 -2.6811E-15 -4.0276E-14 2.5205E-14 -1.3523E-15 8.7169E-16 -2.6811E-15 5.5612E-14 # lat0 lon0 xBary yBary zBary JD0 -0.078210 -32.893771 0.255010 -0.001410 -0.986044 2452491.923773 # Heliocentric elements and errors Epoch: 2452492.5000 = 2002/08/06 Mean Anomaly: 285.24284 +/- 0.012 Argument of Peri: 98.32750 +/- 0.017 Long of Asc Node: 329.08107 +/- 0.000 Inclination: 1.92882 +/- 0.000 Eccentricity: 0.22427024 +/- 0.0000 Semi-Major Axis: 47.62931172 +/- 0.0043 Time of Perihelion: 2477424.6753 +/- 13.6 Perihelion: 36.94747477 +/- 0.0034 Aphelion: 58.31114867 +/- 0.0053 Period (y) 328.7151 +/- 0.04 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 39.48086524 +/- 0.0009 Ecliptic Y -25.83315142 +/- 0.0006 Ecliptic Z -0.06317460 +/- 0.0000 Ecliptic XDOT 0.00087014 +/- 0.0000 Ecliptic YDOT 0.00235938 +/- 0.0000 Ecliptic ZDOT 0.00008322 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 47.18165512 +/- 0.0008 Geocenter to KBO 46.19804517 +/- 0.0011 # Hcoef: 7.07
The following table shows the complete astrometric record for 02PU170. 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 (02PU170) followed by the observatory code and reference code for the source of the astrometry.
2002 08 05.42303 21 57 22.16 -12 32 57.2 23.2R 02PU170 568 Cp2009 2002 08 05.48562 21 57 21.90 -12 32 58.5 23.7R 02PU170 568 Cp2009 2002 08 05.54820 21 57 21.63 -12 33 00.1 23.5R 02PU170 568 Cp2009 2002 08 08.44795 21 57 09.87 -12 34 02.1 02PU170 568 Cp2009 2002 09 03.97196 21 55 20.10 -12 43 35.3 02PU170 950 Cp2009 2002 09 04.01127 21 55 19.97 -12 43 36.1 02PU170 950 Cp2009 2002 09 04.05201 21 55 19.78 -12 43 36.7 23.4R 02PU170 950 Cp2009 2002 09 30.24743 21 53 46.07 -12 51 39.9 23.4R 02PU170 568 Cp2009 2002 09 30.30449 21 53 45.90 -12 51 40.9 23.2R 02PU170 568 Cp2009 2002 09 30.36635 21 53 45.71 -12 51 41.8 23.3R 02PU170 568 Cp2009 2003 10 29.04176 21 56 58.52 -12 32 04.9 02PU170 309 Cp2009 2003 10 29.11922 21 56 58.44 -12 32 05.3 02PU170 309 Cp2009 2004 08 12.39657 22 05 21.84 -11 44 54.9 23.7R 02PU170 568 Cp2009 2004 08 12.42677 22 05 21.71 -11 44 55.8 24.0R 02PU170 568 Cp2009 2004 08 12.46130 22 05 21.57 -11 44 56.4 23.7R 02PU170 568 Cp2009 2005 07 08.52640 22 11 44.19 -11 07 31.2 23.4r 02PU170 568 Cp2009 2005 07 08.56812 22 11 44.08 -11 07 31.8 23.6r 02PU170 568 Cp2009 2005 07 09.54830 22 11 41.35 -11 07 46.5 23.5r 02PU170 568 Cp2009 2006 07 30.43492 22 14 51.51 -10 47 25.8 23.0R 02PU170 250 S~06AX 2006 07 30.43931 22 14 51.49 -10 47 25.9 02PU170 250 S~06AX 2006 07 30.44371 22 14 51.48 -10 47 26.0 02PU170 250 S~06AX 2006 07 30.44811 22 14 51.46 -10 47 26.1 02PU170 250 S~06AX 2014 09 26.20576 22 46 33.71 -07 20 50.1 23.1R 02PU170 695 C~1LJ9 2014 09 26.26612 22 46 33.49 -07 20 51.3 02PU170 695 C~1LJ9 2014 09 26.32350 22 46 33.27 -07 20 53.0 02PU170 695 C~1LJ9 2023 09 06.380190 23 30 35.556 -02 20 22.27 23.6G 02PU170 G37 C~7AMw 2023 09 06.419290 23 30 35.379 -02 20 23.31 02PU170 G37 C~7AMw 2023 09 06.457820 23 30 35.213 -02 20 24.47 02PU170 G37 C~7AMw
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 0.15 0.00 0.84
2 0.0002 0.00 0.10 0.00 0.86
3 0.0003 0.00 -0.10 0.00 0.57
4 0.0083 0.00 -0.18 0.00 0.19
5 0.0809 0.00 -0.32 0.00 -0.41
6 0.0810 0.00 0.15 0.00 -0.39
7 0.0811 0.00 -0.20 0.00 -0.14
8 0.1528 0.00 -0.18 0.00 0.16
9 0.1530 0.00 -0.11 0.00 0.03
10 0.1532 0.00 -0.13 0.00 0.07
11 1.2310 0.00 0.25 0.00 0.20
12 1.2312 0.00 0.38 0.00 0.20
13 2.0205 0.00 -0.19 0.00 -0.15
14 2.0205 0.00 -0.24 0.00 -0.38
15 2.0206 0.00 -0.17 0.00 -0.21
16 2.9243 0.00 -0.28 0.00 -0.03
17 2.9244 0.00 -0.16 0.00 -0.01
18 2.9271 0.00 -0.23 0.00 0.07
19 3.9836 0.00 0.63 0.00 -0.54
20 3.9836 0.00 0.58 0.00 -0.55
21 3.9836 0.00 0.68 0.00 -0.56
22 3.9836 0.00 0.62 0.00 -0.56
23 12.1418 0.00 -0.33 0.00 0.14
24 12.1419 0.00 -0.07 0.00 0.34
25 12.1421 0.00 0.01 0.00 -0.03
26 21.0868 0.00 0.04 0.00 0.07
27 21.0869 0.00 -0.06 0.00 0.09
28 21.0870 0.00 -0.03 0.00 -0.03
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.
02PU170 quality flag:3 Type: 2:1E 2:1E 2:1E axisobj 48.024 48.023 48.024 ecceobj 0.225 0.225 0.225 incobj 1.918 1.918 1.918 qmin 36.527 36.562 36.587 qmax 59.932 59.977 59.969 amean 47.798 47.797 47.797 amin 47.153 47.140 47.153 amax 48.551 48.576 48.538 emean 0.219 0.219 0.219 emin 0.201 0.202 0.202 emax 0.236 0.237 0.237 imean 3.128 3.128 3.124 imin 2.720 2.720 2.720 imax 3.561 3.570 3.554 excite_mean 0.225 0.225 0.225 fracstop 1.000 1.000 1.000 cjmean 3.085 3.085 3.085 libcent 0 179.7 179.9 179.9 libamp 0 152.2 153.2 151.9 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 162.6 162.8 162.5 kozaiamp 179.9 179.8 180.0