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: 15GJ57
# Created Wed May 8 01:17:04 2024
# Orbit generated from Bernstein formalism
# Fitting 36 observations of 36
# Arc: 2.11y
# First observation: 2015/02/17
# Last observation: 2017/03/29
Preliminary a, adot, b, bdot, g, gdot:
-0.000124 0.022468 0.000002 -0.000290 0.023368 0.000000
# Chi-squared of fit: 12.64 DOF: 66 RMS: 0.10
# Min/Max residuals: -0.37 0.29
# Exact a, adot, b, bdot, g, gdot:
1.514935E-05 2.234469E-02 -6.150898E-08 -2.892525E-04 2.339735E-02 1.130608E-03
# Covariance matrix:
1.8748E-13 -6.3844E-15 -4.7139E-16 -8.3337E-16 1.4618E-13 2.0653E-12
-6.3844E-15 2.7766E-13 -1.2199E-16 -2.9246E-15 1.8006E-13 6.6036E-12
-4.7139E-16 -1.2199E-16 9.2905E-14 -6.5609E-14 -6.3188E-16 -4.4905E-15
-8.3337E-16 -2.9246E-15 -6.5609E-14 8.2133E-14 -2.6301E-15 -9.8706E-14
1.4618E-13 1.8006E-13 -6.3188E-16 -2.6301E-15 2.7539E-13 6.1583E-12
2.0653E-12 6.6036E-12 -4.4905E-15 -9.8706E-14 6.1583E-12 2.2303E-10
# lat0 lon0 xBary yBary zBary JD0
1.130657 -154.059690 0.832842 0.010535 -0.526366 2457071.015468
# Heliocentric elements and errors
Epoch: 2457070.5000 = 2015/02/17
Mean Anomaly: 78.90809 +/- 0.091
Argument of Peri: 40.00550 +/- 0.150
Long of Asc Node: 82.08180 +/- 0.026
Inclination: 1.32766 +/- 0.000
Eccentricity: 0.03382182 +/- 0.0007
Semi-Major Axis: 43.51144673 +/- 0.0032
Time of Perihelion: 2434091.9427 +/- 26.4
Perihelion: 42.03981060 +/- 0.0291
Aphelion: 44.98308285 +/- 0.0291
Period (y) 287.0209 +/- 0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -39.26684460 +/- 0.0009
Ecliptic Y -18.17360575 +/- 0.0004
Ecliptic Z 0.84335336 +/- 0.0000
Ecliptic XDOT 0.00102055 +/- 0.0000
Ecliptic YDOT -0.00241497 +/- 0.0000
Ecliptic ZDOT -0.00003114 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 43.27674058 +/- 0.0008
Geocenter to KBO 42.73987776 +/- 0.0010
# Hcoef: 7.51
The following table shows the complete astrometric record for 15GJ57. 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 (15GJ57) followed by the observatory code and reference code for the source of the astrometry.
2015 02 17.51469 13 37 52.110 -08 58 00.76 23.6r 15GJ57 568 C~2nvV 2015 02 17.55579 13 37 52.031 -08 58 00.30 24.1r 15GJ57 568 C~2nvV 2015 02 20.48657 13 37 45.959 -08 57 21.42 24.7r 15GJ57 568 C~2nvV 2015 03 18.49249 13 36 26.366 -08 49 16.07 23.6r 15GJ57 568 C~2nvV 2015 03 18.53407 13 36 26.202 -08 49 15.08 23.4r 15GJ57 568 C~2nvV 2015 03 20.53726 13 36 18.499 -08 48 29.24 23.4r 15GJ57 568 C~2nvV 2015 04 11.47256 13 34 45.778 -08 39 25.51 23.4r 15GJ57 568 C~2nvV 2015 04 12.37938 13 34 41.749 -08 39 01.97 24.1r 15GJ57 568 C~2nvV 2015 04 12.42509 13 34 41.545 -08 39 00.72 24.2r 15GJ57 568 C~2nvV 2015 04 12.46730 13 34 41.359 -08 38 59.71 24.2r 15GJ57 568 C~2nvV 2015 04 18.43790 13 34 14.782 -08 36 26.37 24.0r 15GJ57 568 C~2nvV 2015 04 18.48560 13 34 14.581 -08 36 25.39 24.0r 15GJ57 568 C~2nvV 2015 05 16.28656 13 32 18.221 -08 25 25.88 23.8r 15GJ57 568 C~2nvV 2015 05 17.24686 13 32 14.641 -08 25 06.03 23.8r 15GJ57 568 C~2nvV 2015 05 25.38864 13 31 46.266 -08 22 29.95 23.6r 15GJ57 568 C~2nvV 2015 05 25.44647 13 31 46.078 -08 22 28.91 23.4r 15GJ57 568 C~2nvV 2015 07 12.28879 13 30 31.036 -08 16 28.39 24.4r 15GJ57 568 C~2nvV 2015 07 15.27908 13 30 32.458 -08 16 42.68 23.6r 15GJ57 568 C~2nvV 2016 02 04.61430 13 42 58.390 -09 28 35.66 24.4w 15GJ57 568 C~2nvV 2016 02 11.59753 13 42 51.121 -09 27 44.18 24.3w 15GJ57 568 C~2nvV 2016 03 11.60487 13 41 39.796 -09 20 24.73 24.5w 15GJ57 568 C~2nvV 2016 04 03.47362 13 40 09.651 -09 11 36.97 23.6w 15GJ57 568 C~2nvV 2016 04 09.45477 13 39 43.468 -09 09 06.22 23.8w 15GJ57 568 C~2nvV 2016 05 01.46556 13 38 06.315 -08 59 54.81 24.0w 15GJ57 568 C~2nvV 2016 05 02.33963 13 38 02.615 -08 59 34.00 24.6w 15GJ57 568 C~2nvV 2016 05 07.34298 13 37 41.640 -08 57 36.91 23.9w 15GJ57 568 C~2nvV 2016 05 29.32744 13 36 21.592 -08 50 18.55 24.1w 15GJ57 568 C~2nvV 2016 06 04.38987 13 36 04.107 -08 48 46.10 24.2w 15GJ57 568 C~2nvV 2016 06 27.32010 13 35 21.723 -08 45 17.87 23.9w 15GJ57 568 C~2nvV 2016 06 27.32513 13 35 21.708 -08 45 17.84 23.9w 15GJ57 568 C~2nvV 2016 07 07.31590 13 35 16.298 -08 45 04.33 23.5w 15GJ57 568 C~2nvV 2017 02 24.65166 13 47 15.177 -09 53 24.40 15GJ57 568 C~2nvV 2017 02 27.64150 13 47 07.812 -09 52 39.57 15GJ57 568 C~2nvV 2017 02 27.66186 13 47 07.739 -09 52 39.03 15GJ57 568 C~2nvV 2017 03 29.48748 13 45 24.370 -09 42 33.63 23.9w 15GJ57 568 C~2nvV 2017 03 29.50900 13 45 24.284 -09 42 33.10 23.8w 15GJ57 568 C~2nvV
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 -0.01 0.00 -0.03
2 0.0001 -1.26 0.07 0.00 -0.05
3 0.0081 -99.20 -0.07 3.66 -0.00
4 0.0793 -1374.49 -0.00 28.26 -0.00
5 0.0795 -1377.11 -0.05 28.30 0.03
6 0.0849 -1500.15 0.05 29.56 0.04
7 0.1450 -2978.63 0.01 36.26 -0.03
8 0.1475 -3042.86 -0.21 36.43 0.11
9 0.1476 -3046.14 -0.20 36.49 0.20
10 0.1477 -3049.08 -0.10 36.43 0.15
11 0.1641 -3472.10 -0.05 35.67 0.07
12 0.1642 -3475.24 0.24 35.50 -0.07
13 0.2403 -5323.88 0.29 19.53 0.05
14 0.2429 -5380.61 0.02 18.59 0.01
15 0.2652 -5829.92 -0.09 9.86 -0.02
16 0.2654 -5832.90 -0.03 9.81 0.01
17 0.3964 -7002.46 -0.06 -62.66 0.04
18 0.4046 -6977.55 0.15 -68.22 -0.37
19 0.9640 4892.28 0.08 -76.85 -0.05
20 0.9831 4773.35 0.08 -67.39 0.08
21 1.0625 3629.96 -0.04 -36.49 -0.13
22 1.1251 2194.62 0.04 -24.79 -0.00
23 1.1415 1778.59 0.05 -24.08 0.01
24 1.2018 237.48 -0.14 -30.11 -0.01
25 1.2042 178.84 0.19 -30.56 0.01
26 1.2179 -153.24 -0.02 -33.96 -0.05
27 1.2781 -1417.74 0.02 -55.65 0.03
28 1.2947 -1692.81 -0.05 -63.63 -0.12
29 1.3574 -2353.89 0.01 -98.02 -0.06
30 1.3575 -2354.11 -0.13 -98.07 -0.11
31 1.3848 -2433.74 -0.01 -114.66 -0.09
32 2.0209 8975.23 0.04 -110.55 0.02
33 2.0291 8857.34 0.09 -107.38 0.04
34 2.0292 8856.14 -0.26 -107.26 0.14
35 2.1108 7210.27 0.01 -86.41 0.04
36 2.1109 7208.89 0.08 -86.37 0.08
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.
15GJ57 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.111 43.121 43.100 ecceobj 0.032 0.033 0.031 incobj 1.328 1.328 1.328 qmin 40.777 40.667 40.752 qmax 46.203 46.291 46.176 amean 43.384 43.394 43.373 amin 43.048 43.056 43.042 amax 43.729 43.753 43.715 emean 0.040 0.041 0.039 emin 0.021 0.022 0.020 emax 0.057 0.058 0.056 imean 0.866 0.863 0.868 imin 0.368 0.371 0.366 imax 1.282 1.278 1.286 excite_mean 0.043 0.044 0.042 fracstop 1.000 1.000 1.000 cjmean 3.092 3.092 3.092 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 164.9 164.9 164.6 kozaiamp 180.0 180.0 179.9