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: 15GA55
# Created Sun Dec 22 02:10:19 2024
# Orbit generated from Bernstein formalism
# Fitting 30 observations of 30
# Arc: 2.35y
# First observation: 2015/02/17
# Last observation: 2017/06/26
Preliminary a, adot, b, bdot, g, gdot:
-0.000049 0.027060 0.000020 -0.008761 0.024990 0.000000
# Chi-squared of fit: 4.59 DOF: 54 RMS: 0.07
# Min/Max residuals: -0.17 0.20
# Exact a, adot, b, bdot, g, gdot:
1.628128E-05 2.678670E-02 -5.587527E-06 -8.647534E-03 2.488644E-02 -4.470279E-03
# Covariance matrix:
1.7343E-13 -2.3033E-14 4.5773E-15 -2.1090E-14 1.0930E-13 1.2362E-12
-2.3033E-14 3.5482E-13 2.9658E-14 -1.3070E-13 1.9671E-13 7.6081E-12
4.5773E-15 2.9658E-14 1.0992E-13 -9.3569E-14 2.0984E-14 9.1524E-13
-2.1090E-14 -1.3070E-13 -9.3569E-14 1.7341E-13 -9.3576E-14 -4.0261E-12
1.0930E-13 1.9671E-13 2.0984E-14 -9.3576E-14 2.3414E-13 5.4574E-12
1.2362E-12 7.6081E-12 9.1524E-13 -4.0261E-12 5.4574E-12 2.3430E-10
# lat0 lon0 xBary yBary zBary JD0
0.895601 -152.491504 0.846865 0.008017 -0.503542 2457071.023648
# Heliocentric elements and errors
Epoch: 2457070.5000 = 2015/02/17
Mean Anomaly: 344.60402 +/- 0.032
Argument of Peri: 213.75329 +/- 0.087
Long of Asc Node: 29.04592 +/- 0.000
Inclination: 17.93874 +/- 0.001
Eccentricity: 0.38972457 +/- 0.0004
Semi-Major Axis: 62.99451710 +/- 0.0242
Time of Perihelion: 2464880.6133 +/- 15.6
Perihelion: 38.44400579 +/- 0.0299
Aphelion: 87.54502840 +/- 0.0425
Period (y) 499.9912 +/- 0.29
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -36.47577565 +/- 0.0007
Ecliptic Y -18.03871286 +/- 0.0004
Ecliptic Z 0.62784691 +/- 0.0000
Ecliptic XDOT 0.00178041 +/- 0.0000
Ecliptic YDOT -0.00239905 +/- 0.0000
Ecliptic ZDOT -0.00095883 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 40.69731641 +/- 0.0006
Geocenter to KBO 40.18252908 +/- 0.0008
# Hcoef: 8.17
The following table shows the complete astrometric record for 15GA55. 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 (15GA55) followed by the observatory code and reference code for the source of the astrometry.
2015 02 17.52287 13 43 27.327 -09 45 02.65 24.1r 15GA55 568 C~2lV9 2015 02 17.56399 13 43 27.231 -09 45 02.27 24.5r 15GA55 568 C~2lV9 2015 02 20.59770 13 43 20.854 -09 44 38.27 24.1r 15GA55 568 C~2lV9 2015 03 18.50144 13 41 58.396 -09 38 40.21 24.6r 15GA55 568 C~2lV9 2015 03 18.54235 13 41 58.225 -09 38 39.31 24.4r 15GA55 568 C~2lV9 2015 03 20.54594 13 41 50.095 -09 38 02.35 24.1r 15GA55 568 C~2lV9 2015 04 11.48071 13 40 11.636 -09 30 27.49 24.0r 15GA55 568 C~2lV9 2015 04 12.38760 13 40 07.345 -09 30 07.43 24.6r 15GA55 568 C~2lV9 2015 04 12.43323 13 40 07.124 -09 30 06.52 24.1r 15GA55 568 C~2lV9 2015 04 12.47547 13 40 06.915 -09 30 05.51 24.2r 15GA55 568 C~2lV9 2015 05 25.39688 13 36 57.370 -09 16 00.19 24.3r 15GA55 568 C~2lV9 2015 05 25.45500 13 36 57.150 -09 15 59.20 24.3r 15GA55 568 C~2lV9 2015 06 21.34643 13 35 45.650 -09 11 53.31 24.3r 15GA55 568 C~2lV9 2015 06 22.30309 13 35 44.145 -09 11 50.69 24.1r 15GA55 568 C~2lV9 2015 07 12.29701 13 35 30.871 -09 12 40.40 24.5r 15GA55 568 C~2lV9 2015 07 19.28682 13 35 34.732 -09 13 46.75 24.3r 15GA55 568 C~2lV9 2016 02 04.63543 13 48 52.615 -10 46 28.09 24.4w 15GA55 568 C~2lV9 2016 02 11.61375 13 48 45.804 -10 46 22.28 24.5w 15GA55 568 C~2lV9 2016 03 11.61710 13 47 32.507 -10 41 51.86 24.5w 15GA55 568 C~2lV9 2016 03 12.48956 13 47 29.346 -10 41 38.30 24.3w 15GA55 568 C~2lV9 2016 04 09.46692 13 45 28.766 -10 32 44.81 24.3w 15GA55 568 C~2lV9 2016 05 02.35585 13 43 39.694 -10 24 32.54 24.2w 15GA55 568 C~2lV9 2016 05 07.35921 13 43 16.840 -10 22 50.83 24.1w 15GA55 568 C~2lV9 2016 05 29.33148 13 41 48.796 -10 16 34.06 24.4w 15GA55 568 C~2lV9 2016 06 04.39391 13 41 29.294 -10 15 17.39 24.7w 15GA55 568 C~2lV9 2016 06 27.31561 13 40 40.710 -10 12 49.83 24.4w 15GA55 568 C~2lV9 2016 07 07.31185 13 40 33.470 -10 13 04.53 24.2w 15GA55 568 C~2lV9 2017 02 27.65350 13 53 26.472 -11 45 54.32 15GA55 568 C~2lV9 2017 03 30.50649 13 51 32.686 -11 38 18.14 24.2w 15GA55 568 C~2lV9 2017 06 26.27262 13 45 51.765 -11 14 20.86 24.8w 15GA55 568 C~2lV9
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 0.02
2 0.0001 -1.46 -0.04 -0.15 0.04
3 0.0084 -98.08 -0.06 -11.50 -0.04
4 0.0793 -1364.63 0.10 -114.36 -0.10
5 0.0795 -1367.31 -0.00 -114.42 0.02
6 0.0849 -1492.80 -0.09 -123.09 -0.10
7 0.1450 -3015.46 0.00 -222.44 -0.04
8 0.1475 -3081.92 0.04 -226.60 0.12
9 0.1476 -3085.30 0.07 -226.93 0.03
10 0.1477 -3088.55 -0.02 -227.10 0.08
11 0.2652 -6011.08 0.09 -452.50 -0.03
12 0.2654 -6014.47 -0.07 -452.76 0.05
13 0.3390 -7091.27 -0.02 -607.74 0.06
14 0.3416 -7113.01 0.04 -613.39 0.01
15 0.3964 -7278.29 -0.09 -731.18 -0.00
16 0.4155 -7200.83 -0.00 -772.25 0.01
17 0.9640 5800.40 -0.05 -1735.01 0.04
18 0.9831 5704.41 -0.02 -1765.11 0.05
19 1.0625 4597.77 0.01 -1895.20 -0.17
20 1.0649 4549.38 -0.06 -1899.06 -0.05
21 1.1415 2697.51 0.06 -2032.86 -0.07
22 1.2042 1018.78 0.05 -2147.63 0.09
23 1.2179 667.51 0.02 -2173.36 0.05
24 1.2781 -680.53 0.01 -2287.61 -0.02
25 1.2947 -976.73 -0.07 -2319.48 -0.07
26 1.3574 -1699.06 -0.09 -2439.77 -0.05
27 1.3848 -1793.50 -0.08 -2491.97 0.01
28 2.0291 10836.34 -0.04 -3657.01 0.09
29 2.1136 9107.01 -0.05 -3816.18 -0.09
30 2.3539 3904.26 0.20 -4245.29 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.
15GA55 quality flag:3 Type: 3:1EE 3:1EE 3:1EE axisobj 62.106 62.159 62.054 ecceobj 0.383 0.384 0.382 incobj 18.008 18.008 18.008 qmin 37.128 37.611 36.813 qmax 89.681 89.251 89.847 amean 62.629 62.629 62.629 amin 61.783 61.751 61.782 amax 63.704 63.752 63.746 emean 0.388 0.386 0.388 emin 0.369 0.373 0.365 emax 0.408 0.400 0.412 imean 17.545 17.762 17.503 imin 16.700 17.472 16.360 imax 18.278 18.074 18.636 excite_mean 0.492 0.492 0.491 fracstop 1.000 1.000 1.000 cjmean 3.015 3.015 3.015 libcent 0 264.9 180.1 268.5 libamp 0 64.2 153.4 58.6 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 192.5 184.7 246.3 kozaiamp 180.0 180.0 180.0