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: 15GP57
# Created Wed May 8 01:17:05 2024
# Orbit generated from Bernstein formalism
# Fitting 34 observations of 34
# Arc: 2.35y
# First observation: 2015/02/17
# Last observation: 2017/06/26
Preliminary a, adot, b, bdot, g, gdot:
-0.000109 0.027863 0.000003 -0.002159 0.025966 0.000000
# Chi-squared of fit: 10.48 DOF: 62 RMS: 0.10
# Min/Max residuals: -0.22 0.24
# Exact a, adot, b, bdot, g, gdot:
1.734392E-05 2.764771E-02 -1.626286E-06 -2.141182E-03 2.593830E-02 -2.238205E-03
# Covariance matrix:
1.5221E-13 -2.3254E-14 9.3552E-16 -4.7835E-15 9.7852E-14 1.1726E-12
-2.3254E-14 3.3382E-13 6.6950E-15 -3.0157E-14 1.8191E-13 7.2933E-12
9.3552E-16 6.6950E-15 9.4681E-14 -7.2404E-14 4.6245E-15 2.1068E-13
-4.7835E-15 -3.0157E-14 -7.2404E-14 1.0263E-13 -2.1551E-14 -9.4511E-13
9.7852E-14 1.8191E-13 4.6245E-15 -2.1551E-14 2.1731E-13 5.2319E-12
1.1726E-12 7.2933E-12 2.1068E-13 -9.4511E-13 5.2319E-12 2.2846E-10
# lat0 lon0 xBary yBary zBary JD0
0.517814 -152.759051 0.844504 0.004732 -0.507533 2457071.023648
# Heliocentric elements and errors
Epoch: 2457070.5000 = 2015/02/17
Mean Anomaly: 330.57776 +/- 0.101
Argument of Peri: 214.62735 +/- 0.159
Long of Asc Node: 32.57906 +/- 0.001
Inclination: 4.45011 +/- 0.001
Eccentricity: 0.17204604 +/- 0.0004
Semi-Major Axis: 45.47406308 +/- 0.0067
Time of Perihelion: 2466224.6342 +/- 31.4
Perihelion: 37.65043071 +/- 0.0187
Aphelion: 53.29769544 +/- 0.0195
Period (y) 306.6577 +/- 0.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -35.11622354 +/- 0.0006
Ecliptic Y -17.12777031 +/- 0.0003
Ecliptic Z 0.34835387 +/- 0.0000
Ecliptic XDOT 0.00154036 +/- 0.0000
Ecliptic YDOT -0.00249298 +/- 0.0000
Ecliptic ZDOT -0.00022804 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 39.07212589 +/- 0.0006
Geocenter to KBO 38.55302414 +/- 0.0007
# Hcoef: 8.90
The following table shows the complete astrometric record for 15GP57. 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 (15GP57) followed by the observatory code and reference code for the source of the astrometry.
2015 02 17.52287 13 41 53.489 -10 00 26.94 25.1r 15GP57 568 C~2nvW 2015 02 17.56399 13 41 53.415 -10 00 26.38 25.2r 15GP57 568 C~2nvW 2015 02 20.59770 13 41 46.903 -09 59 51.19 24.9r 15GP57 568 C~2nvW 2015 03 18.50144 13 40 22.365 -09 52 07.67 25.0r 15GP57 568 C~2nvW 2015 03 18.54235 13 40 22.200 -09 52 06.79 25.2r 15GP57 568 C~2nvW 2015 03 20.54594 13 40 13.863 -09 51 20.96 25.1r 15GP57 568 C~2nvW 2015 04 11.48071 13 38 32.808 -09 42 05.82 24.7r 15GP57 568 C~2nvW 2015 04 12.38760 13 38 28.417 -09 41 41.75 24.5r 15GP57 568 C~2nvW 2015 04 12.43323 13 38 28.178 -09 41 40.43 24.5r 15GP57 568 C~2nvW 2015 04 12.47547 13 38 27.970 -09 41 39.23 24.7r 15GP57 568 C~2nvW 2015 04 18.44608 13 37 58.802 -09 38 59.41 24.8r 15GP57 568 C~2nvW 2015 04 18.49382 13 37 58.558 -09 38 58.06 24.8r 15GP57 568 C~2nvW 2015 05 17.25497 13 35 46.202 -09 27 00.00 24.9r 15GP57 568 C~2nvW 2015 05 25.45500 13 35 14.514 -09 24 11.73 25.0r 15GP57 568 C~2nvW 2015 06 21.34643 13 34 03.360 -09 18 11.38 24.7r 15GP57 568 C~2nvW 2015 06 22.30309 13 34 01.917 -09 18 05.06 24.8r 15GP57 568 C~2nvW 2015 07 12.29701 13 33 50.704 -09 17 40.95 25.0r 15GP57 568 C~2nvW 2015 07 19.28682 13 33 55.643 -09 18 23.97 25.5r 15GP57 568 C~2nvW 2016 02 04.63139 13 48 01.671 -10 42 47.83 23.6w 15GP57 568 C~2nvW 2016 02 04.63543 13 48 01.673 -10 42 47.86 23.7w 15GP57 568 C~2nvW 2016 02 11.60966 13 47 55.032 -10 42 14.90 25.3w 15GP57 568 C~2nvW 2016 02 11.61375 13 47 55.016 -10 42 14.97 25.3w 15GP57 568 C~2nvW 2016 03 11.60894 13 46 40.732 -10 35 41.55 24.8w 15GP57 568 C~2nvW 2016 04 03.48577 13 45 02.905 -10 26 55.00 24.9w 15GP57 568 C~2nvW 2016 04 09.46692 13 44 34.214 -10 24 20.25 25.1w 15GP57 568 C~2nvW 2016 05 02.35585 13 42 42.842 -10 14 21.38 25.0w 15GP57 568 C~2nvW 2016 05 07.35921 13 42 19.552 -10 12 16.87 24.9w 15GP57 568 C~2nvW 2016 05 29.33148 13 40 50.270 -10 04 25.04 25.3w 15GP57 568 C~2nvW 2016 06 04.39391 13 40 30.648 -10 02 43.93 25.0w 15GP57 568 C~2nvW 2016 06 27.31561 13 39 42.688 -09 58 51.73 25.3w 15GP57 568 C~2nvW 2016 07 07.31185 13 39 36.276 -09 58 33.60 25.0w 15GP57 568 C~2nvW 2017 02 27.65350 13 53 17.028 -11 20 10.68 15GP57 568 C~2nvW 2017 03 31.45116 13 51 17.192 -11 09 43.72 24.7w 15GP57 568 C~2nvW 2017 06 26.27262 13 45 35.975 -10 40 08.51 25.0w 15GP57 568 C~2nvW
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 -0.10 0.00 0.07
2 0.0001 -1.22 0.02 0.13 0.24
3 0.0084 -103.64 -0.12 -1.58 0.07
4 0.0793 -1435.85 -0.08 -18.37 -0.04
5 0.0795 -1438.44 0.04 -18.42 -0.05
6 0.0849 -1569.89 0.06 -20.05 -0.04
7 0.1450 -3163.58 -0.04 -41.40 -0.08
8 0.1475 -3232.84 0.20 -42.42 -0.12
9 0.1476 -3236.61 -0.01 -42.47 -0.09
10 0.1477 -3239.91 -0.02 -42.46 -0.02
11 0.1641 -3699.95 0.05 -49.46 0.06
12 0.1642 -3703.80 -0.07 -49.50 0.09
13 0.2429 -5789.88 0.09 -90.22 0.03
14 0.2654 -6288.30 0.01 -103.92 -0.15
15 0.3390 -7401.56 -0.05 -151.75 0.09
16 0.3416 -7423.79 0.04 -153.66 -0.03
17 0.3964 -7587.36 -0.12 -191.74 0.00
18 0.4155 -7503.48 0.13 -205.15 -0.01
19 0.9640 5983.40 -0.08 -434.75 -0.20
20 0.9640 5983.43 -0.00 -434.77 -0.22
21 0.9831 5880.14 0.13 -438.67 0.16
22 0.9831 5879.95 0.02 -438.82 0.02
23 1.0625 4715.77 0.20 -459.96 -0.01
24 1.1252 3179.54 -0.07 -481.88 -0.00
25 1.1415 2728.83 0.02 -488.43 0.12
26 1.2042 979.67 0.12 -517.37 0.09
27 1.2179 614.07 -0.06 -524.46 0.05
28 1.2781 -785.75 -0.05 -557.87 0.04
29 1.2947 -1092.53 -0.13 -567.87 -0.08
30 1.3574 -1837.09 -0.07 -606.59 -0.08
31 1.3848 -1931.98 -0.06 -623.85 -0.00
32 2.0291 11128.20 -0.03 -897.24 0.22
33 2.1162 9252.72 -0.14 -929.43 -0.10
34 2.3539 3918.35 0.18 -1049.42 -0.04
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.
15GP57 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 45.007 45.020 44.994 ecceobj 0.166 0.167 0.166 incobj 4.467 4.467 4.467 qmin 37.084 37.075 37.113 qmax 53.949 54.030 53.909 amean 45.331 45.345 45.312 amin 44.930 44.952 44.918 amax 45.765 45.796 45.760 emean 0.163 0.164 0.162 emin 0.146 0.147 0.146 emax 0.180 0.180 0.178 imean 3.813 3.820 3.827 imin 2.952 2.954 2.965 imax 4.709 4.726 4.733 excite_mean 0.176 0.177 0.175 fracstop 1.000 1.000 1.000 cjmean 3.079 3.079 3.079 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 182.7 182.8 183.0 kozaiamp 180.0 180.0 179.9