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: 15GA57
# Created Wed May 8 01:17:04 2024
# Orbit generated from Bernstein formalism
# Fitting 40 observations of 40
# Arc: 2.11y
# First observation: 2015/02/17
# Last observation: 2017/03/29
Preliminary a, adot, b, bdot, g, gdot:
-0.000178 0.025142 0.000003 -0.000723 0.024606 0.000000
# Chi-squared of fit: 4.46 DOF: 74 RMS: 0.06
# Min/Max residuals: -0.14 0.12
# Exact a, adot, b, bdot, g, gdot:
1.604784E-05 2.494345E-02 -1.543847E-07 -7.164487E-04 2.467224E-02 -6.120139E-04
# Covariance matrix:
1.4254E-13 -4.4324E-14 -1.8303E-16 -1.0394E-15 9.8646E-14 9.8610E-13
-4.4324E-14 3.5678E-13 1.4356E-15 -1.0037E-14 1.4473E-13 9.1145E-12
-1.8303E-16 1.4356E-15 7.5428E-14 -6.6052E-14 4.3878E-16 5.2463E-14
-1.0394E-15 -1.0037E-14 -6.6052E-14 1.1180E-13 -6.1213E-15 -3.7322E-13
9.8646E-14 1.4473E-13 4.3878E-16 -6.1213E-15 1.9843E-13 5.6144E-12
9.8610E-13 9.1145E-12 5.2463E-14 -3.7322E-13 5.6144E-12 3.3905E-10
# lat0 lon0 xBary yBary zBary JD0
1.069820 -155.679848 0.817707 0.010410 -0.549585 2457071.006958
# Heliocentric elements and errors
Epoch: 2457070.5000 = 2015/02/17
Mean Anomaly: 330.58623 +/- 0.394
Argument of Peri: 181.31935 +/- 0.479
Long of Asc Node: 56.18821 +/- 0.012
Inclination: 1.93642 +/- 0.001
Eccentricity: 0.08013012 +/- 0.0004
Semi-Major Axis: 44.09339890 +/- 0.0036
Time of Perihelion: 2465808.3981 +/- 117.1
Perihelion: 40.56018977 +/- 0.0187
Aphelion: 47.62660803 +/- 0.0188
Period (y) 292.7983 +/- 0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -37.76855292 +/- 0.0007
Ecliptic Y -16.17056086 +/- 0.0003
Ecliptic Z 0.75674155 +/- 0.0000
Ecliptic XDOT 0.00119681 +/- 0.0000
Ecliptic YDOT -0.00250053 +/- 0.0000
Ecliptic ZDOT -0.00008067 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 41.09164497 +/- 0.0006
Geocenter to KBO 40.53139029 +/- 0.0007
# Hcoef: 7.80
The following table shows the complete astrometric record for 15GA57. 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 (15GA57) followed by the observatory code and reference code for the source of the astrometry.
2015 02 17.50618 13 31 40.463 -08 26 00.27 23.7r 15GA57 568 C~2nvU 2015 02 17.54752 13 31 40.377 -08 25 59.61 23.9r 15GA57 568 C~2nvU 2015 02 20.47836 13 31 33.732 -08 25 17.91 23.9r 15GA57 568 C~2nvU 2015 03 18.47955 13 30 08.454 -08 16 39.98 23.6r 15GA57 568 C~2nvU 2015 03 18.48429 13 30 08.437 -08 16 39.95 23.8r 15GA57 568 C~2nvU 2015 03 18.52590 13 30 08.266 -08 16 38.84 23.6r 15GA57 568 C~2nvU 2015 03 20.52796 13 30 00.107 -08 15 50.31 24.1r 15GA57 568 C~2nvU 2015 04 11.41852 13 28 22.808 -08 06 18.35 23.4r 15GA57 568 C~2nvU 2015 04 12.37119 13 28 18.405 -08 05 52.77 23.8r 15GA57 568 C~2nvU 2015 04 12.42087 13 28 18.163 -08 05 51.35 23.6r 15GA57 568 C~2nvU 2015 04 12.45912 13 28 17.986 -08 05 50.27 23.7r 15GA57 568 C~2nvU 2015 04 13.12231 13 28 14.91 -08 05 32.1 24.4V 15GA57 W84 C~3jdt 2015 04 13.21165 13 28 14.49 -08 05 29.8 15GA57 W84 C~3jdt 2015 04 13.30360 13 28 14.06 -08 05 27.4 15GA57 W84 C~3jdt 2015 04 14.46908 13 28 08.655 -08 04 56.13 24.0r 15GA57 568 C~2nvU 2015 04 18.42971 13 27 50.287 -08 03 09.72 24.0r 15GA57 568 C~2nvU 2015 04 18.47743 13 27 50.056 -08 03 08.63 24.2r 15GA57 568 C~2nvU 2015 05 16.27640 13 25 50.173 -07 51 46.69 23.7r 15GA57 568 C~2nvU 2015 05 25.38047 13 25 17.826 -07 48 48.28 23.7r 15GA57 568 C~2nvU 2015 05 25.43825 13 25 17.620 -07 48 47.30 23.8r 15GA57 568 C~2nvU 2015 06 21.33006 13 24 14.988 -07 43 23.82 24.4r 15GA57 568 C~2nvU 2015 06 22.28659 13 24 13.812 -07 43 18.69 24.4r 15GA57 568 C~2nvU 2015 07 12.28060 13 24 07.331 -07 43 21.25 23.9r 15GA57 568 C~2nvU 2015 07 19.27044 13 24 13.436 -07 44 12.15 24.1r 15GA57 568 C~2nvU 2016 02 04.57138 13 37 19.968 -09 01 44.93 24.2w 15GA57 568 C~2nvU 2016 02 04.59812 13 37 19.944 -09 01 44.74 24.5w 15GA57 568 C~2nvU 2016 02 10.55937 13 37 13.150 -09 00 58.72 24.2w 15GA57 568 C~2nvU 2016 02 10.60896 13 37 13.076 -09 00 58.43 24.3w 15GA57 568 C~2nvU 2016 02 10.61712 13 37 13.069 -09 00 58.47 24.4w 15GA57 568 C~2nvU 2016 02 11.58117 13 37 11.664 -09 00 49.19 24.3w 15GA57 568 C~2nvU 2016 03 11.56702 13 35 54.706 -08 53 00.45 22.6w 15GA57 568 C~2nvU 2016 04 03.45744 13 34 19.265 -08 43 41.96 24.3w 15GA57 568 C~2nvU 2016 04 09.43859 13 33 51.787 -08 41 03.35 24.3w 15GA57 568 C~2nvU 2016 05 01.36857 13 32 10.998 -08 31 29.37 24.1w 15GA57 568 C~2nvU 2016 05 02.31122 13 32 06.845 -08 31 05.90 24.3w 15GA57 568 C~2nvU 2016 05 06.32100 13 31 49.444 -08 29 28.29 23.8w 15GA57 568 C~2nvU 2016 05 28.30028 13 30 26.665 -08 21 52.95 24.0w 15GA57 568 C~2nvU 2016 06 04.37773 13 30 05.994 -08 20 03.42 24.3w 15GA57 568 C~2nvU 2017 03 29.47811 13 40 07.717 -09 19 53.31 15GA57 568 C~2nvU 2017 03 29.49962 13 40 07.628 -09 19 52.86 24.2w 15GA57 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 -0.01 0.00 -0.06
2 0.0001 -1.43 0.03 0.15 0.06
3 0.0081 -108.45 -0.08 2.81 -0.08
4 0.0793 -1475.85 -0.03 20.23 0.03
5 0.0793 -1476.10 0.03 20.16 -0.04
6 0.0795 -1478.87 -0.00 20.26 0.07
7 0.0849 -1609.35 0.10 20.91 0.04
8 0.1449 -3163.29 -0.10 21.28 -0.01
9 0.1475 -3233.51 0.09 20.98 -0.05
10 0.1476 -3237.38 -0.04 20.97 -0.02
11 0.1477 -3240.22 -0.01 21.01 0.05
12 0.1495 -3289.39 -0.14 21.07 0.11
13 0.1498 -3296.04 -0.07 20.91 0.02
14 0.1500 -3302.86 0.01 20.79 -0.04
15 0.1532 -3389.03 0.01 20.28 0.03
16 0.1641 -3681.92 -0.00 18.65 0.10
17 0.1642 -3685.52 -0.02 18.40 -0.10
18 0.2403 -5593.37 0.08 -5.44 0.06
19 0.2652 -6106.36 0.08 -17.52 0.08
20 0.2654 -6109.57 -0.06 -17.74 -0.04
21 0.3390 -7095.04 0.05 -62.07 -0.01
22 0.3416 -7113.20 0.07 -63.78 0.01
23 0.3964 -7201.83 0.02 -101.90 0.02
24 0.4155 -7098.56 -0.02 -115.54 -0.05
25 0.9639 5470.29 0.06 -161.16 -0.00
26 0.9640 5469.89 0.07 -161.11 0.03
27 0.9803 5359.32 -0.07 -154.76 0.12
28 0.9804 5358.20 -0.01 -154.89 -0.03
29 0.9805 5358.11 0.11 -154.97 -0.11
30 0.9831 5335.34 0.03 -153.87 -0.01
31 1.0625 4101.99 -0.01 -131.62 -0.07
32 1.1251 2580.60 -0.03 -126.96 -0.05
33 1.1415 2143.34 -0.05 -127.99 0.00
34 1.2015 542.08 -0.03 -140.29 -0.10
35 1.2041 476.16 0.00 -141.01 -0.03
36 1.2151 200.20 0.02 -144.73 -0.03
37 1.2753 -1109.50 -0.04 -171.61 -0.02
38 1.2947 -1435.07 -0.01 -182.40 -0.04
39 2.1108 8182.83 -0.08 -276.49 0.11
40 2.1109 8181.44 0.05 -276.55 0.06
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.
15GA57 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.666 43.675 43.658 ecceobj 0.074 0.074 0.074 incobj 1.940 1.940 1.940 qmin 40.007 40.004 40.052 qmax 48.177 48.121 48.087 amean 43.957 43.966 43.948 amin 43.612 43.620 43.598 amax 44.333 44.339 44.313 emean 0.070 0.070 0.070 emin 0.053 0.053 0.053 emax 0.087 0.086 0.086 imean 1.146 1.147 1.144 imin 0.285 0.287 0.281 imax 1.730 1.736 1.724 excite_mean 0.073 0.073 0.073 fracstop 1.000 1.000 1.000 cjmean 3.095 3.095 3.094 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 182.6 182.8 182.4 kozaiamp 179.9 179.9 180.0