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: 15GF55
# Created Sun Dec 22 02:10:19 2024
# Orbit generated from Bernstein formalism
# Fitting 32 observations of 34
# Arc: 2.12y
# First observation: 2015/02/17
# Last observation: 2017/03/31
Preliminary a, adot, b, bdot, g, gdot:
-0.000208 0.034231 0.000004 0.003171 0.029330 0.000000
# Chi-squared of fit: 13.00 DOF: 58 RMS: 0.11
# Min/Max residuals: -0.34 0.32
# Exact a, adot, b, bdot, g, gdot:
1.852464E-05 3.415596E-02 1.565102E-06 3.177323E-03 2.947570E-02 5.476799E-03
# Covariance matrix:
1.9267E-13 -3.0622E-14 -1.6296E-15 6.9865E-15 1.2948E-13 1.2572E-12
-3.0622E-14 3.9302E-13 -8.0956E-15 3.8044E-14 1.8767E-13 6.7933E-12
-1.6296E-15 -8.0956E-15 1.0203E-13 -8.4946E-14 -5.6970E-15 -2.0524E-13
6.9865E-15 3.8044E-14 -8.4946E-14 1.3050E-13 2.6001E-14 9.6526E-13
1.2948E-13 1.8767E-13 -5.6970E-15 2.6001E-14 2.3736E-13 4.6540E-12
1.2572E-12 6.7933E-12 -2.0524E-13 9.6526E-13 4.6540E-12 1.7235E-10
# lat0 lon0 xBary yBary zBary JD0
0.373174 -152.668072 0.845346 0.003442 -0.506140 2457071.019568
# Heliocentric elements and errors
Epoch: 2457070.5000 = 2015/02/17
Mean Anomaly: 23.96616 +/- 0.038
Argument of Peri: 323.84299 +/- 0.076
Long of Asc Node: 201.96735 +/- 0.001
Inclination: 5.31337 +/- 0.001
Eccentricity: 0.25222701 +/- 0.0003
Semi-Major Axis: 43.87944876 +/- 0.0078
Time of Perihelion: 2450002.6699 +/- 11.2
Perihelion: 32.81186661 +/- 0.0146
Aphelion: 54.94703091 +/- 0.0166
Period (y) 290.6698 +/- 0.08
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -30.97864886 +/- 0.0005
Ecliptic Y -15.05810971 +/- 0.0002
Ecliptic Z 0.22101269 +/- 0.0000
Ecliptic XDOT 0.00100282 +/- 0.0000
Ecliptic YDOT -0.00305665 +/- 0.0000
Ecliptic ZDOT 0.00029853 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 34.44520576 +/- 0.0005
Geocenter to KBO 33.92624874 +/- 0.0006
# Hcoef: 9.16
The following table shows the complete astrometric record for 15GF55. 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 (15GF55) followed by the observatory code and reference code for the source of the astrometry.
2015 02 17.51879 13 42 01.527 -10 10 30.52 24.6r 15GF55 568 C~2lVA 2015 02 17.55988 13 42 01.442 -10 10 29.95 24.7r 15GF55 568 C~2lVA 2015 02 20.49066 13 41 54.848 -10 09 45.03 24.7r 15GF55 568 C~2lVA 2015 03 18.49737 13 40 23.085 -09 59 59.71 23.1r 15GF55 568 C~2lVA 2015 03 18.53825 13 40 22.874 -09 59 57.85 24.1r 15GF55 568 C~2lVA 2015 03 20.54180 13 40 13.759 -09 59 01.05 24.4r 15GF55 568 C~2lVA 2015 04 11.47664 13 38 22.783 -09 47 38.07 24.6r 15GF55 568 C~2lVA 2015 04 12.38346 13 38 17.915 -09 47 08.78 24.9r 15GF55 568 C~2lVA 2015 04 12.42916 13 38 17.690 -09 47 07.30 24.5r 15GF55 568 C~2lVA 2015 04 12.47137 13 38 17.438 -09 47 05.77 24.5r 15GF55 568 C~2lVA 2015 04 18.44198 13 37 45.348 -09 43 49.65 24.4r 15GF55 568 C~2lVA 2015 04 18.48972 13 37 45.071 -09 43 47.96 24.1r 15GF55 568 C~2lVA 2015 05 17.25497 13 35 20.018 -09 29 02.25 24.3r 15GF55 568 C~2lVA 2015 05 25.39688 13 34 45.864 -09 25 32.72 24.5r 15GF55 568 C~2lVA 2015 05 25.45500 13 34 45.645 -09 25 31.23 24.5r 15GF55 568 C~2lVA 2015 06 21.34643 13 33 30.229 -09 17 39.46 24.9r 15GF55 568 C~2lVA 2015 06 22.30309 13 33 28.797 -09 17 30.08 24.1r 15GF55 568 C~2lVA 2015 07 12.29701 13 33 20.103 -09 16 17.34 25.1r 15GF55 568 C~2lVA 2015 07 19.28682 13 33 27.039 -09 16 50.16 24.5r 15GF55 568 C~2lVA 2016 02 04.63543 13 49 57.518 -10 44 06.49 25.1w 15GF55 568 C~2lVA 2016 02 11.61375 13 49 51.523 -10 43 13.13 25.0w 15GF55 568 C~2lVA 2016 03 11.61710 13 48 33.790 -10 34 40.13 24.6w 15GF55 568 C~2lVA 2016 03 12.48956 13 48 30.315 -10 34 18.15 25.1w 15GF55 568 C~2lVA 2016 04 03.48576 13 46 47.840 -10 23 51.65 24.7w 15GF55 568 C~2lVA 2016 04 09.46692 13 46 16.528 -10 20 42.92 24.9w 15GF55 568 C~2lVA 2016 05 02.35585 13 44 14.767 -10 08 34.16 24.8w 15GF55 568 C~2lVA 2016 05 07.35921 13 43 49.308 -10 06 01.97 25.1w 15GF55 568 C~2lVA 2016 05 29.33148 13 42 12.050 -09 56 21.23 24.7w 15GF55 568 C~2lVA 2016 06 04.39391 13 41 50.846 -09 54 14.20 24.7w 15GF55 568 C~2lVA 2016 06 27.31561 13 41 00.152 -09 49 04.52 24.8w 15GF55 568 C~2lVA 2016 07 07.31185 13 40 54.303 -09 48 23.61 24.9w 15GF55 568 C~2lVA 2017 02 27.65350 13 56 55.445 -11 09 51.66 15GF55 568 C~2lVA 2017 03 30.51590 13 54 52.899 -10 57 16.52 24.4w 15GF55 568 C~2lVA 2017 03 31.45116 13 54 48.273 -10 56 49.35 24.9w 15GF55 568 C~2lVA
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 -0.04 0.00 0.03
2 0.0001 -1.38 0.04 0.08 0.04
3 0.0081 -108.37 -0.01 7.05 0.00
4 0.0793 -1583.42 ( 0.46) 65.82 ( -0.69)
5 0.0795 -1587.00 -0.12 66.43 -0.14
6 0.0849 -1733.08 0.01 70.91 0.00
7 0.1450 -3509.26 0.16 115.94 0.29
8 0.1475 -3586.96 -0.02 117.23 -0.20
9 0.1476 -3590.60 0.32 117.41 -0.08
10 0.1477 -3594.62 -0.02 117.49 -0.06
11 0.1641 -4108.01 -0.08 128.67 0.05
12 0.1642 -4112.44 -0.34 128.77 0.07
13 0.2429 -6434.43 0.02 175.74 0.01
14 0.2652 -6981.96 0.01 187.05 0.01
15 0.2654 -6985.53 0.16 187.26 0.15
16 0.3390 -8198.52 -0.17 219.82 -0.02
17 0.3416 -8221.72 0.09 220.82 -0.09
18 0.3964 -8368.33 0.09 241.59 -0.05
19 0.4155 -8260.58 -0.13 248.51 -0.04
20 0.9640 7281.95 0.04 616.80 0.14
21 0.9831 7180.32 -0.01 635.52 0.01
22 1.0626 5925.76 0.12 709.99 -0.14
23 1.0649 5870.01 -0.16 712.40 0.10
24 1.1252 4233.59 0.01 761.63 0.03
25 1.1415 3734.48 -0.07 773.65 0.05
26 1.2042 1795.09 0.22 813.37 -0.18
27 1.2179 1389.55 -0.05 821.07 0.12
28 1.2781 -159.80 0.01 848.48 0.04
29 1.2947 -497.82 -0.05 854.56 -0.08
30 1.3574 -1308.26 0.11 874.27 -0.02
31 1.3848 -1403.65 -0.15 881.34 -0.08
32 2.0291 13604.68 -0.00 1328.42 -0.01
33 2.1136 11643.19 ( -0.09) 1407.10 ( 0.51)
34 2.1162 11569.63 -0.01 1408.74 0.05
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.
15GF55 quality flag:3 Type: 7:4EEE 7:4EEE 7:4EEE Type: 7:4EII axisobj 43.398 43.426 43.370 ecceobj 0.244 0.245 0.243 incobj 5.332 5.332 5.332 qmin 31.705 31.642 31.874 qmax 56.280 56.396 56.299 amean 43.726 43.726 43.726 amin 43.297 43.322 43.286 amax 44.255 44.228 44.268 emean 0.257 0.260 0.239 emin 0.234 0.242 0.128 emax 0.274 0.275 0.272 imean 4.637 3.893 6.583 imin 3.405 2.827 4.067 imax 6.904 5.672 13.402 excite_mean 0.270 0.270 0.270 fracstop 1.000 1.000 1.000 cjmean 3.010 3.010 3.009 libcent 0 179.9 179.7 162.1 libamp 0 49.7 35.2 86.3 libcent 1 -180.0 166.5 -180.0 libamp 1 -180.0 155.0 -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 131.4 236.5 125.0 kozaiamp 180.0 179.8 179.9