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: 15GW56
# Created Wed May 8 01:17:04 2024
# Orbit generated from Bernstein formalism
# Fitting 32 observations of 32
# Arc: 2.11y
# First observation: 2015/02/17
# Last observation: 2017/03/29
Preliminary a, adot, b, bdot, g, gdot:
-0.000132 0.020517 0.000002 0.000387 0.022105 0.000000
# Chi-squared of fit: 8.99 DOF: 58 RMS: 0.09
# Min/Max residuals: -0.26 0.34
# Exact a, adot, b, bdot, g, gdot:
1.468973E-05 2.046798E-02 1.411239E-07 3.864216E-04 2.221330E-02 2.534769E-03
# Covariance matrix:
1.9223E-13 -5.5442E-14 -7.7299E-16 1.3412E-15 1.3071E-13 1.7285E-12
-5.5442E-14 3.4336E-13 -2.1151E-15 7.5509E-15 1.5209E-13 9.5429E-12
-7.7299E-16 -2.1151E-15 1.0102E-13 -8.5464E-14 -2.1149E-15 -9.7461E-14
1.3412E-15 7.5509E-15 -8.5464E-14 1.3207E-13 5.7701E-15 3.4177E-13
1.3071E-13 1.5209E-13 -2.1149E-15 5.7701E-15 2.4636E-13 7.3343E-12
1.7285E-12 9.5429E-12 -9.7461E-14 3.4177E-13 7.3343E-12 4.3208E-10
# lat0 lon0 xBary yBary zBary JD0
1.228758 -155.874771 0.815912 0.011993 -0.552212 2457070.998808
# Heliocentric elements and errors
Epoch: 2457070.5000 = 2015/02/17
Mean Anomaly: 84.39190 +/- 0.121
Argument of Peri: 311.12483 +/- 0.090
Long of Asc Node: 155.31304 +/- 0.027
Inclination: 1.63842 +/- 0.001
Eccentricity: 0.10707570 +/- 0.0010
Semi-Major Axis: 45.53517345 +/- 0.0111
Time of Perihelion: 2430760.7222 +/- 36.6
Perihelion: 40.65946304 +/- 0.0460
Aphelion: 50.41088385 +/- 0.0466
Period (y) 307.2760 +/- 0.11
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -41.91682604 +/- 0.0009
Ecliptic Y -17.87723055 +/- 0.0004
Ecliptic Z 0.96537811 +/- 0.0000
Ecliptic XDOT 0.00074334 +/- 0.0000
Ecliptic YDOT -0.00243520 +/- 0.0000
Ecliptic ZDOT 0.00005441 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 45.58012322 +/- 0.0009
Geocenter to KBO 45.01807050 +/- 0.0010
# Hcoef: 7.91
The following table shows the complete astrometric record for 15GW56. 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 (15GW56) followed by the observatory code and reference code for the source of the astrometry.
2015 02 17.49803 13 31 10.618 -08 12 50.72 24.3r 15GW56 568 C~2nvT 2015 02 17.53937 13 31 10.547 -08 12 50.25 24.5r 15GW56 568 C~2nvT 2015 02 20.47010 13 31 04.378 -08 12 08.99 24.4r 15GW56 568 C~2nvT 2015 03 18.51775 13 29 45.904 -08 03 51.93 24.3r 15GW56 568 C~2nvT 2015 03 20.51950 13 29 38.452 -08 03 06.06 24.5r 15GW56 568 C~2nvT 2015 04 11.41033 13 28 09.799 -07 54 09.12 24.8r 15GW56 568 C~2nvT 2015 04 12.36301 13 28 05.769 -07 53 45.09 24.7r 15GW56 568 C~2nvT 2015 04 12.40393 13 28 05.592 -07 53 44.02 24.9r 15GW56 568 C~2nvT 2015 04 12.45094 13 28 05.382 -07 53 42.74 24.2r 15GW56 568 C~2nvT 2015 04 14.46090 13 27 56.915 -07 52 52.25 24.6r 15GW56 568 C~2nvT 2015 04 18.42156 13 27 40.178 -07 51 12.88 24.5r 15GW56 568 C~2nvT 2015 04 18.46928 13 27 39.981 -07 51 11.80 24.0r 15GW56 568 C~2nvT 2015 05 16.26602 13 25 50.788 -07 40 34.63 23.8r 15GW56 568 C~2nvT 2015 05 25.37165 13 25 21.226 -07 37 46.92 24.6r 15GW56 568 C~2nvT 2015 06 21.32182 13 24 23.265 -07 32 35.03 24.2r 15GW56 568 C~2nvT 2015 06 22.27832 13 24 22.155 -07 32 29.73 24.5r 15GW56 568 C~2nvT 2015 07 12.27234 13 24 15.222 -07 32 18.23 24.8r 15GW56 568 C~2nvT 2015 07 19.26227 13 24 20.334 -07 32 59.31 24.3r 15GW56 568 C~2nvT 2016 02 04.57138 13 35 55.683 -08 39 30.54 24.9w 15GW56 568 C~2nvT 2016 02 10.55937 13 35 49.027 -08 38 40.32 25.1w 15GW56 568 C~2nvT 2016 02 10.60896 13 35 48.953 -08 38 40.06 24.9w 15GW56 568 C~2nvT 2016 02 11.58118 13 35 47.602 -08 38 30.24 24.7w 15GW56 568 C~2nvT 2016 03 11.56702 13 34 36.278 -08 30 49.51 24.7w 15GW56 568 C~2nvU 2016 04 03.45744 13 33 09.249 -08 22 01.31 24.6w 15GW56 568 C~2nvU 2016 04 09.43859 13 32 44.286 -08 19 32.69 24.2w 15GW56 568 C~2nvU 2016 05 01.36857 13 31 12.919 -08 10 37.57 24.4w 15GW56 568 C~2nvU 2016 05 02.31122 13 31 09.136 -08 10 15.62 24.6w 15GW56 568 C~2nvU 2016 05 06.32100 13 30 53.357 -08 08 44.82 24.8w 15GW56 568 C~2nvU 2016 05 28.28409 13 29 38.324 -08 01 40.93 24.9w 15GW56 568 C~2nvU 2016 06 04.36558 13 29 19.491 -07 59 58.16 24.4w 15GW56 568 C~2nvU 2017 02 24.64250 13 39 47.471 -08 59 45.14 15GW56 568 C~2nvU 2017 03 29.45933 13 37 59.361 -08 48 41.99 24.8w 15GW56 568 C~2nvU
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 -0.02 0.00 0.03
2 0.0001 -1.15 0.20 0.05 0.03
3 0.0081 -101.49 0.02 4.84 0.05
4 0.0795 -1367.90 -0.03 39.24 -0.03
5 0.0849 -1487.69 0.02 41.21 -0.04
6 0.1449 -2909.97 0.08 55.70 0.02
7 0.1475 -2974.50 -0.09 55.97 -0.04
8 0.1476 -2977.34 -0.12 56.00 -0.01
9 0.1477 -2980.71 -0.26 56.04 0.04
10 0.1532 -3116.30 0.15 56.60 0.05
11 0.1641 -3384.17 -0.11 57.28 -0.03
12 0.1642 -3387.29 0.04 57.20 -0.10
13 0.2403 -5131.51 0.06 50.03 -0.04
14 0.2652 -5602.17 0.06 43.27 0.02
15 0.3390 -6519.00 0.01 13.84 0.03
16 0.3416 -6536.31 0.03 12.64 0.06
17 0.3964 -6636.43 0.00 -14.90 -0.01
18 0.4155 -6550.51 -0.02 -24.88 -0.09
19 0.9639 4522.51 0.19 56.31 0.02
20 0.9803 4412.25 -0.11 67.16 0.10
21 0.9805 4411.13 -0.07 67.01 -0.12
22 0.9831 4388.89 -0.07 68.86 0.01
23 1.0625 3235.44 -0.03 112.40 0.11
24 1.1251 1840.22 -0.04 132.53 0.02
25 1.1415 1441.03 -0.10 135.34 0.05
26 1.2016 -17.06 0.34 136.40 -0.03
27 1.2041 -77.36 0.07 136.22 0.03
28 1.2151 -328.63 -0.06 134.73 -0.03
29 1.2753 -1520.76 -0.04 119.68 -0.01
30 1.2946 -1818.71 -0.17 112.37 -0.11
31 2.0209 8168.27 -0.13 170.88 0.05
32 2.1108 6432.57 0.17 208.85 -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.
15GW56 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 45.103 45.135 45.070 ecceobj 0.106 0.109 0.104 incobj 1.644 1.644 1.644 qmin 39.574 39.505 39.703 qmax 51.446 51.609 51.263 amean 45.383 45.416 45.351 amin 45.005 45.049 44.981 amax 45.790 45.823 45.757 emean 0.110 0.112 0.107 emin 0.096 0.098 0.093 emax 0.124 0.127 0.122 imean 1.743 1.740 1.745 imin 1.120 1.113 1.125 imax 2.284 2.285 2.281 excite_mean 0.114 0.116 0.111 fracstop 1.000 1.000 1.000 cjmean 3.102 3.102 3.103 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 183.3 183.4 183.0 kozaiamp 180.0 180.0 180.0