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: 15GP55
# Created Wed Mar 26 01:10:27 2025
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 39 observations of 39
# Arc: 7.36y
# First observation: 2015/02/17
# Last observation: 2022/06/29
# Chi-squared of fit: 19.73 DOF: 72 RMS: 0.13
# Min/Max residuals: -0.42 0.40
# Exact a, adot, b, bdot, g, gdot:
1.450371E-05 2.316518E-02 2.110387E-06 4.206358E-03 2.515880E-02 -7.789320E-04
# Covariance matrix:
1.7862E-13 -6.1996E-14 7.2924E-15 -1.5135E-14 9.5298E-14 -4.7565E-13
-6.1996E-14 1.6907E-13 -1.9539E-14 3.7856E-14 4.8274E-14 1.1730E-12
7.2924E-15 -1.9539E-14 5.7513E-14 -1.6156E-14 -4.6788E-15 -1.4372E-13
-1.5135E-14 3.7856E-14 -1.6156E-14 1.7310E-14 8.0321E-15 2.7944E-13
9.5298E-14 4.8274E-14 -4.6788E-15 8.0321E-15 1.2783E-13 2.4206E-13
-4.7565E-13 1.1730E-12 -1.4372E-13 2.7944E-13 2.4206E-13 8.6658E-12
# lat0 lon0 xBary yBary zBary JD0
1.072201 -153.442921 0.838461 0.009829 -0.517382 2457071.015468
# Heliocentric elements and errors
Epoch: 2457070.5000 = 2015/02/17
Mean Anomaly: 209.20433 +/- 0.047
Argument of Peri: 162.40131 +/- 0.046
Long of Asc Node: 199.56409 +/- 0.000
Inclination: 10.36202 +/- 0.000
Eccentricity: 0.11529289 +/- 0.0001
Semi-Major Axis: 36.50263964 +/- 0.0017
Time of Perihelion: 2490812.5291 +/- 10.9
Perihelion: 32.29414499 +/- 0.0031
Aphelion: 40.71113429 +/- 0.0033
Period (y) 220.5437 +/- 0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -36.38801387 +/- 0.0005
Ecliptic Y -17.24885083 +/- 0.0002
Ecliptic Z 0.74384868 +/- 0.0000
Ecliptic XDOT 0.00120688 +/- 0.0000
Ecliptic YDOT -0.00221877 +/- 0.0000
Ecliptic ZDOT 0.00045617 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 40.27612378 +/- 0.0005
Geocenter to KBO 39.74755598 +/- 0.0006
# Hcoef: 8.29
The following table shows the complete astrometric record for 15GP55. 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 (15GP55) followed by the observatory code and reference code for the source of the astrometry.
2015 02 17.51469 13 40 06.737 -09 14 39.08 24.4r 15GP55 568 C~2lVB 2015 02 17.55579 13 40 06.651 -09 14 38.56 24.3r 15GP55 568 C~2lVB 2015 03 18.49249 13 38 36.447 -09 04 10.49 24.2r 15GP55 568 C~2lVB 2015 03 18.53407 13 38 36.251 -09 04 09.53 24.6r 15GP55 568 C~2lVB 2015 03 20.53726 13 38 28.074 -09 03 15.42 24.1r 15GP55 568 C~2lVB 2015 04 11.47256 13 36 49.175 -08 52 37.73 23.7r 15GP55 568 C~2lVB 2015 04 12.37938 13 36 44.880 -08 52 10.32 24.2r 15GP55 568 C~2lVB 2015 04 12.42509 13 36 44.662 -08 52 08.82 24.5r 15GP55 568 C~2lVB 2015 04 12.46730 13 36 44.450 -08 52 07.69 23.9r 15GP55 568 C~2lVB 2015 04 18.43790 13 36 15.990 -08 49 07.57 24.1r 15GP55 568 C~2lVB 2015 04 18.48560 13 36 15.767 -08 49 06.21 24.1r 15GP55 568 C~2lVB 2015 05 16.28656 13 34 10.827 -08 36 04.12 23.9r 15GP55 568 C~2lVB 2015 05 17.24686 13 34 06.975 -08 35 40.31 24.0r 15GP55 568 C~2lVB 2015 05 25.38864 13 33 36.441 -08 32 30.39 24.2r 15GP55 568 C~2lVB 2015 05 25.44647 13 33 36.237 -08 32 29.08 24.2r 15GP55 568 C~2lVB 2015 06 21.33827 13 32 27.228 -08 25 17.77 24.2r 15GP55 568 C~2lVB 2015 06 22.29486 13 32 25.827 -08 25 08.74 24.3r 15GP55 568 C~2lVB 2015 07 12.28879 13 32 14.963 -08 23 50.74 24.3r 15GP55 568 C~2lVB 2015 07 15.27909 13 32 16.485 -08 23 57.77 24.3r 15GP55 568 C~2lVB 2015 07 19.27863 13 32 19.728 -08 24 14.03 24.2r 15GP55 568 C~2lVB 2016 02 04.61430 13 45 47.195 -09 32 24.40 24.6w 15GP55 568 C~2lVB 2016 02 11.59752 13 45 40.057 -09 31 12.23 24.4w 15GP55 568 C~2lVB 2016 03 11.60487 13 44 25.724 -09 22 08.03 24.5w 15GP55 568 C~2lVB 2016 04 03.47362 13 42 49.875 -09 11 42.82 24.3w 15GP55 568 C~2lVB 2016 04 09.45477 13 42 21.883 -09 08 45.45 24.2w 15GP55 568 C~2lVB 2016 05 01.46556 13 40 37.624 -08 57 56.14 24.3w 15GP55 568 C~2lVB 2016 05 02.33963 13 40 33.634 -08 57 31.59 24.3w 15GP55 568 C~2lVB 2016 05 07.34298 13 40 11.063 -08 55 12.92 24.5w 15GP55 568 C~2lVB 2016 05 29.32744 13 38 44.637 -08 46 26.13 24.6w 15GP55 568 C~2lVB 2016 06 04.38987 13 38 25.709 -08 44 31.56 24.2w 15GP55 568 C~2lVB 2016 06 27.32010 13 37 39.523 -08 39 51.90 24.8w 15GP55 568 C~2lVB 2016 06 27.32513 13 37 39.504 -08 39 51.71 24.7w 15GP55 568 C~2lVB 2016 07 07.31590 13 37 33.419 -08 39 12.94 24.5w 15GP55 568 C~2lVB 2017 03 30.49709 13 48 37.201 -09 28 57.58 24.3w 15GP55 568 C~2lVB 2022 06 29.04510 14 10 10.900 -10 06 48.90 24.4r 15GP55 269 C~8ian 2022 06 29.04866 14 10 10.928 -10 06 49.39 26.1z 15GP55 269 C~8ian 2022 06 29.06411 14 10 10.869 -10 06 48.76 24.1r 15GP55 269 C~8ian 2022 06 29.08028 14 10 10.834 -10 06 48.62 24.4r 15GP55 269 C~8ian 2022 06 29.09885 14 10 10.806 -10 06 48.43 25.9r 15GP55 269 C~8ian
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 0.05 0.00 0.10
2 0.0001 0.00 0.06 0.00 -0.02
3 0.0793 0.00 0.13 0.00 0.11
4 0.0795 0.00 -0.24 0.00 -0.04
5 0.0849 0.00 -0.04 0.00 0.08
6 0.1450 0.00 -0.02 0.00 -0.05
7 0.1475 0.00 0.04 0.00 0.00
8 0.1476 0.00 0.09 0.00 0.13
9 0.1477 0.00 -0.03 0.00 -0.02
10 0.1641 0.00 -0.09 0.00 0.02
11 0.1642 0.00 0.04 0.00 -0.05
12 0.2403 0.00 0.12 0.00 0.02
13 0.2429 0.00 -0.17 0.00 -0.03
14 0.2652 0.00 0.00 0.00 0.09
15 0.2654 0.00 0.05 0.00 0.13
16 0.3390 0.00 -0.10 0.00 -0.02
17 0.3416 0.00 -0.11 0.00 0.01
18 0.3964 0.00 -0.17 0.00 0.05
19 0.4046 0.00 0.38 0.00 -0.28
20 0.4155 0.00 -0.05 0.00 -0.06
21 0.9640 0.00 0.11 0.00 0.01
22 0.9831 0.00 -0.01 0.00 -0.05
23 1.0625 0.00 -0.13 0.00 -0.08
24 1.1251 0.00 0.03 0.00 0.00
25 1.1415 0.00 0.06 0.00 0.03
26 1.2018 0.00 -0.14 0.00 0.19
27 1.2042 0.00 0.06 0.00 0.02
28 1.2179 0.00 0.00 0.00 0.06
29 1.2781 0.00 -0.00 0.00 0.06
30 1.2947 0.00 0.06 0.00 0.02
31 1.3574 0.00 0.02 0.00 -0.32
32 1.3575 0.00 -0.18 0.00 -0.16
33 1.3848 0.00 -0.03 0.00 0.02
34 2.1136 0.00 0.02 0.00 0.05
35 7.3608 0.00 -0.11 0.00 0.09
36 7.3608 0.00 0.40 0.00 -0.42
37 7.3608 0.00 -0.06 0.00 0.09
38 7.3609 0.00 -0.14 0.00 0.11
39 7.3609 0.00 -0.05 0.00 0.16
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.
15GP55 quality flag:3 Type: 4:3E 4:3E 4:3E axisobj 36.239 36.239 36.239 ecceobj 0.124 0.124 0.124 incobj 10.413 10.413 10.413 qmin 31.233 31.232 31.233 qmax 42.011 42.010 42.012 amean 36.478 36.478 36.478 amin 36.162 36.162 36.162 amax 36.816 36.816 36.816 emean 0.113 0.113 0.113 emin 0.084 0.084 0.084 emax 0.143 0.143 0.143 imean 12.244 12.244 12.244 imin 10.363 10.363 10.363 imax 14.112 14.112 14.112 excite_mean 0.241 0.241 0.241 fracstop 1.000 1.000 1.000 cjmean 2.962 2.962 2.962 libcent 0 180.5 180.5 180.4 libamp 0 51.3 51.2 51.3 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 180.2 180.2 180.2 kozaiamp 180.0 179.9 180.0