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: 15GF54
# Created Sun Dec 22 02:10:19 2024
# Orbit generated from Bernstein formalism
# Fitting 36 observations of 36
# Arc: 2.10y
# First observation: 2015/02/20
# Last observation: 2017/03/29
Preliminary a, adot, b, bdot, g, gdot:
-0.000259 0.023082 0.000007 0.004353 0.024884 0.000000
# Chi-squared of fit: 23.55 DOF: 66 RMS: 0.14
# Min/Max residuals: -0.56 0.36
# Exact a, adot, b, bdot, g, gdot:
1.456908E-05 2.310888E-02 2.835324E-06 4.392809E-03 2.517623E-02 7.209712E-03
# Covariance matrix:
2.3528E-13 -2.3342E-14 -5.0364E-15 2.0035E-14 1.7119E-13 2.3837E-12
-2.3342E-14 2.3203E-13 -1.1387E-14 4.5631E-14 1.3851E-13 5.4122E-12
-5.0364E-15 -1.1387E-14 1.0483E-13 -8.1192E-14 -1.2103E-14 -4.5197E-13
2.0035E-14 4.5631E-14 -8.1192E-14 1.1058E-13 4.8345E-14 1.8109E-12
1.7119E-13 1.3851E-13 -1.2103E-14 4.8345E-14 2.6354E-13 5.7419E-12
2.3837E-12 5.4122E-12 -4.5197E-13 1.8109E-12 5.7419E-12 2.1480E-10
# lat0 lon0 xBary yBary zBary JD0
0.214314 -156.736155 0.777377 0.002416 -0.606295 2457073.958438
# Heliocentric elements and errors
Epoch: 2457070.5000 = 2015/02/17
Mean Anomaly: 78.39992 +/- 0.086
Argument of Peri: 251.01520 +/- 0.042
Long of Asc Node: 201.03960 +/- 0.000
Inclination: 10.69495 +/- 0.001
Eccentricity: 0.27706924 +/- 0.0005
Semi-Major Axis: 39.52574077 +/- 0.0123
Time of Perihelion: 2437303.9195 +/- 19.7
Perihelion: 28.57437368 +/- 0.0223
Aphelion: 50.47710785 +/- 0.0258
Period (y) 248.5011 +/- 0.12
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -37.35719497 +/- 0.0007
Ecliptic Y -15.21318142 +/- 0.0003
Ecliptic Z 0.14867822 +/- 0.0000
Ecliptic XDOT 0.00027029 +/- 0.0000
Ecliptic YDOT -0.00262326 +/- 0.0000
Ecliptic ZDOT 0.00048073 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 40.33637330 +/- 0.0007
Geocenter to KBO 39.72000818 +/- 0.0008
# Hcoef: 8.50
The following table shows the complete astrometric record for 15GF54. 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 (15GF54) followed by the observatory code and reference code for the source of the astrometry.
2015 02 20.45766 13 26 25.612 -08 50 23.95 24.7r 15GF54 568 C~2lV6 2015 03 18.50553 13 24 56.024 -08 40 18.89 23.9r 15GF54 568 C~2lV6 2015 03 20.50715 13 24 47.607 -08 39 23.10 24.6r 15GF54 568 C~2lV6 2015 04 11.39801 13 23 07.692 -08 28 29.43 24.7r 15GF54 568 C~2lV6 2015 04 12.35069 13 23 03.186 -08 27 59.76 24.2r 15GF54 568 C~2lV6 2015 04 12.39166 13 23 02.981 -08 27 58.38 24.0r 15GF54 568 C~2lV6 2015 04 12.43732 13 23 02.771 -08 27 57.30 24.7r 15GF54 568 C~2lV6 2015 04 14.44843 13 22 53.255 -08 26 55.31 24.8r 15GF54 568 C~2lV6 2015 04 16.38638 13 22 44.105 -08 25 55.24 23.8r 15GF54 568 C~2lV6 2015 04 18.40224 13 22 34.601 -08 24 53.69 24.4r 15GF54 568 C~2lV6 2015 05 16.24826 13 20 33.450 -08 11 40.22 24.2r 15GF54 568 C~2lV6 2015 05 25.35722 13 20 01.264 -08 08 05.96 24.8r 15GF54 568 C~2lV6 2015 05 25.40100 13 20 01.114 -08 08 04.82 25.0r 15GF54 568 C~2lV6 2015 06 21.30955 13 19 00.265 -08 00 59.07 25.0r 15GF54 568 C~2lV6 2015 06 22.26586 13 18 59.178 -08 00 50.35 24.9r 15GF54 568 C~2lV6 2015 07 12.25999 13 18 55.118 -07 59 42.89 24.7r 15GF54 568 C~2lV6 2015 07 19.29173 13 19 02.266 -08 00 10.93 24.5r 15GF54 568 C~2lV6 2016 02 04.55925 13 32 13.674 -09 09 10.38 25.0w 15GF54 568 C~2lV6 2016 02 10.54717 13 32 05.934 -09 08 05.50 24.4w 15GF54 568 C~2lV6 2016 02 10.59675 13 32 05.843 -09 08 04.92 25.0w 15GF54 568 C~2lV6 2016 03 12.48022 13 30 39.634 -08 58 02.60 25.4w 15GF54 568 C~2lV6 2016 04 03.44530 13 29 05.234 -08 47 44.76 24.6w 15GF54 568 C~2lV6 2016 04 09.42510 13 28 37.316 -08 44 44.29 24.7w 15GF54 568 C~2lV6 2016 05 01.36049 13 26 55.620 -08 33 49.13 24.8w 15GF54 568 C~2lV6 2016 05 02.30311 13 26 51.426 -08 33 22.43 24.6w 15GF54 568 C~2lV6 2016 05 06.31289 13 26 34.061 -08 31 30.61 24.6w 15GF54 568 C~2lV6 2016 05 28.28005 13 25 12.002 -08 22 37.78 24.9w 15GF54 568 C~2lV6 2016 06 04.36154 13 24 51.790 -08 20 23.98 24.9w 15GF54 568 C~2lV6 2016 06 27.28890 13 24 13.172 -08 15 52.94 24.8w 15GF54 568 C~2lV6 2016 06 27.29295 13 24 13.164 -08 15 52.60 24.9w 15GF54 568 C~2lV6 2016 07 07.29150 13 24 10.431 -08 15 19.36 24.8w 15GF54 568 C~2lV6 2016 07 07.29554 13 24 10.434 -08 15 19.51 25.2w 15GF54 568 C~2lV6 2017 02 24.64250 13 36 50.214 -09 18 51.90 15GF54 568 C~2lV6 2017 03 28.57437 13 34 52.779 -09 05 49.26 15GF54 568 C~2lV6 2017 03 29.43565 13 34 48.983 -09 05 24.47 24.8w 15GF54 568 C~2lV6 2017 03 29.45933 13 34 48.866 -09 05 23.74 24.0w 15GF54 568 C~2lV6
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 -0.02
2 0.0713 -1457.82 -0.32 70.25 -0.31
3 0.0768 -1594.43 0.09 75.78 -0.08
4 0.1367 -3213.43 0.10 132.39 -0.17
5 0.1393 -3286.54 -0.04 135.07 0.10
6 0.1394 -3289.88 -0.19 135.22 0.16
7 0.1396 -3293.17 0.07 135.06 -0.08
8 0.1451 -3447.33 0.10 140.10 -0.08
9 0.1504 -3595.74 0.03 145.35 0.32
10 0.1559 -3749.59 0.20 150.00 -0.01
11 0.2321 -5715.02 -0.11 216.02 -0.04
12 0.2571 -6238.80 0.06 236.29 -0.07
13 0.2572 -6241.29 -0.07 236.52 0.08
14 0.3309 -7239.69 0.11 293.50 0.00
15 0.3335 -7257.95 -0.04 295.54 0.07
16 0.3882 -7339.22 -0.04 335.56 0.06
17 0.4075 -7230.13 0.07 349.30 -0.01
18 0.9558 5210.49 0.19 850.47 0.06
19 0.9722 5079.99 -0.01 868.87 0.03
20 0.9723 5078.52 -0.12 868.91 -0.05
21 1.0569 3668.92 0.23 960.94 -0.05
22 1.1170 2140.41 -0.03 1021.07 0.01
23 1.1334 1689.12 0.11 1036.40 0.03
24 1.1934 45.66 -0.22 1088.84 0.36
25 1.1960 -22.01 -0.56 1090.66 0.06
26 1.2070 -302.69 0.20 1099.34 0.01
27 1.2671 -1631.02 -0.03 1143.67 0.00
28 1.2865 -1959.23 0.12 1156.76 0.07
29 1.3493 -2592.17 0.15 1195.84 -0.14
30 1.3493 -2592.41 -0.03 1196.12 0.12
31 1.3767 -2642.43 -0.05 1211.93 -0.13
32 1.3767 -2642.33 0.04 1211.80 -0.26
33 2.0128 9240.22 -0.07 1803.14 0.13
34 2.1003 7332.66 -0.11 1899.26 -0.16
35 2.1026 7271.19 0.16 1901.84 -0.01
36 2.1027 7269.31 0.02 1901.89 -0.01
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.
15GF54 quality flag:3 Type: 3:2E 3:2E 3:2E axisobj 39.202 39.234 39.169 ecceobj 0.277 0.279 0.276 incobj 10.741 10.741 10.741 qmin 28.086 27.877 28.065 qmax 51.565 51.653 51.459 amean 39.455 39.455 39.455 amin 38.979 38.992 38.957 amax 40.029 39.998 40.008 emean 0.249 0.252 0.247 emin 0.190 0.185 0.190 emax 0.289 0.294 0.287 imean 12.706 12.392 12.996 imin 10.320 9.773 10.612 imax 15.362 15.464 15.994 excite_mean 0.334 0.333 0.336 fracstop 1.000 1.000 1.000 cjmean 2.924 2.925 2.923 libcent 0 178.2 179.4 179.8 libamp 0 93.0 87.5 98.8 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 280.6 273.4 287.0 kozaiamp 69.9 77.1 74.3