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: 15GL54
# Created Sun Dec 22 02:10:19 2024
# Orbit generated from Bernstein formalism
# Fitting 35 observations of 35
# Arc: 2.11y
# First observation: 2015/02/17
# Last observation: 2017/03/29
Preliminary a, adot, b, bdot, g, gdot:
-0.000136 0.032032 0.000001 0.000051 0.028910 0.000000
# Chi-squared of fit: 5.31 DOF: 64 RMS: 0.07
# Min/Max residuals: -0.17 0.19
# Exact a, adot, b, bdot, g, gdot:
1.707566E-05 3.152241E-02 1.072421E-07 4.933782E-05 2.881659E-02 -6.132901E-03
# Covariance matrix:
1.7130E-13 -1.5721E-14 -5.0864E-16 3.3022E-16 1.2154E-13 1.1773E-12
-1.5721E-14 3.6074E-13 -9.7079E-16 1.5917E-15 1.7271E-13 6.3688E-12
-5.0864E-16 -9.7079E-16 8.2312E-14 -6.4216E-14 -1.0104E-15 -2.3714E-14
3.3022E-16 1.5917E-15 -6.4216E-14 1.0043E-13 1.0937E-15 3.8937E-14
1.2154E-13 1.7271E-13 -1.0104E-15 1.0937E-15 2.1446E-13 4.2155E-12
1.1773E-12 6.3688E-12 -2.3714E-14 3.8937E-14 4.2155E-12 1.5582E-10
# lat0 lon0 xBary yBary zBary JD0
1.261988 -155.511561 0.819318 0.012200 -0.547143 2457071.006958
# Heliocentric elements and errors
Epoch: 2457070.5000 = 2015/02/17
Mean Anomaly: 309.87529 +/- 0.016
Argument of Peri: 159.82537 +/- 0.041
Long of Asc Node: 118.42259 +/- 0.026
Inclination: 1.24723 +/- 0.000
Eccentricity: 0.23797132 +/- 0.0004
Semi-Major Axis: 39.66654689 +/- 0.0082
Time of Perihelion: 2469775.7833 +/- 1.2
Perihelion: 30.22704640 +/- 0.0173
Aphelion: 49.10604739 +/- 0.0190
Period (y) 249.8301 +/- 0.08
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -32.41336689 +/- 0.0005
Ecliptic Y -13.86209497 +/- 0.0002
Ecliptic Z 0.76428214 +/- 0.0000
Ecliptic XDOT 0.00176801 +/- 0.0000
Ecliptic YDOT -0.00248958 +/- 0.0000
Ecliptic ZDOT -0.00000805 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 35.26142591 +/- 0.0005
Geocenter to KBO 34.70222851 +/- 0.0006
# Hcoef: 8.49
The following table shows the complete astrometric record for 15GL54. 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 (15GL54) followed by the observatory code and reference code for the source of the astrometry.
2015 02 17.50618 13 32 35.513 -08 18 58.28 24.3r 15GL54 568 C~2lV7 2015 02 17.54752 13 32 35.410 -08 18 57.60 24.2r 15GL54 568 C~2lV7 2015 02 20.47836 13 32 28.005 -08 18 08.38 24.1r 15GL54 568 C~2lV7 2015 03 18.47955 13 30 51.244 -08 08 00.23 23.9r 15GL54 568 C~2lV7 2015 03 18.48429 13 30 51.199 -08 08 00.13 23.8r 15GL54 568 C~2lV7 2015 03 18.52590 13 30 51.013 -08 07 58.99 24.0r 15GL54 568 C~2lV7 2015 03 20.52796 13 30 41.669 -08 07 01.96 24.0r 15GL54 568 C~2lV7 2015 04 11.41852 13 28 50.000 -07 55 51.82 24.0r 15GL54 568 C~2lV7 2015 04 12.37119 13 28 44.919 -07 55 21.59 23.8r 15GL54 568 C~2lV7 2015 04 12.42087 13 28 44.647 -07 55 19.93 23.9r 15GL54 568 C~2lV7 2015 04 12.45912 13 28 44.424 -07 55 18.91 23.8r 15GL54 568 C~2lV7 2015 04 14.46908 13 28 33.704 -07 54 15.34 24.1r 15GL54 568 C~2lV7 2015 04 18.42971 13 28 12.570 -07 52 11.15 23.7r 15GL54 568 C~2lV7 2015 05 16.26602 13 25 54.520 -07 38 54.50 23.8r 15GL54 568 C~2lV7 2015 05 25.37165 13 25 17.477 -07 35 27.49 24.2r 15GL54 568 C~2lV7 2015 05 25.41355 13 25 17.313 -07 35 26.65 23.6r 15GL54 568 C~2lV7 2015 05 25.42921 13 25 17.250 -07 35 26.25 23.8r 15GL54 568 C~2lV7 2015 06 21.32182 13 24 06.433 -07 29 15.96 23.9r 15GL54 568 C~2lV7 2015 06 22.27832 13 24 05.147 -07 29 10.34 23.4r 15GL54 568 C~2lV7 2015 07 12.27234 13 23 59.407 -07 29 20.92 23.9r 15GL54 568 C~2lV7 2015 07 15.26255 13 24 02.102 -07 29 43.56 23.9r 15GL54 568 C~2lV7 2015 07 19.26227 13 24 07.162 -07 30 23.00 24.2r 15GL54 568 C~2lV7 2016 02 04.59812 13 39 47.770 -09 00 58.89 24.3w 15GL54 568 C~2lV7 2016 02 10.61712 13 39 40.736 -09 00 04.88 24.3w 15GL54 568 C~2lV7 2016 03 11.56702 13 38 13.379 -08 50 46.21 24.0w 15GL54 568 C~2lV7 2016 04 03.45744 13 36 23.976 -08 39 51.46 24.1w 15GL54 568 C~2lV7 2016 04 09.43859 13 35 52.269 -08 36 45.47 24.2w 15GL54 568 C~2lV7 2016 05 06.32911 13 33 30.599 -08 23 10.37 24.2w 15GL54 568 C~2lV7 2016 05 28.30028 13 31 54.756 -08 14 18.73 24.1w 15GL54 568 C~2lV7 2016 06 04.37773 13 31 30.878 -08 12 11.30 23.9w 15GL54 568 C~2lV7 2016 06 27.33366 13 30 44.316 -08 08 25.70 24.4w 15GL54 568 C~2lV7 2016 07 07.32400 13 30 40.357 -08 08 25.20 24.1w 15GL54 568 C~2lV7 2017 02 24.65166 13 46 08.011 -09 36 10.83 15GL54 568 C~2lV7 2017 03 29.48748 13 43 54.141 -09 22 46.34 24.0w 15GL54 568 C~2lV7 2017 03 29.50900 13 43 54.038 -09 22 45.71 23.8w 15GL54 568 C~2lV7
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 0.05 0.00 -0.02
2 0.0001 -1.67 0.03 0.07 0.00
3 0.0081 -121.97 -0.07 5.67 -0.01
4 0.0793 -1681.44 0.15 45.21 0.10
5 0.0793 -1682.10 -0.15 45.06 -0.05
6 0.0795 -1685.09 0.01 45.11 -0.03
7 0.0849 -1835.10 -0.04 47.25 -0.02
8 0.1449 -3624.27 0.15 61.01 -0.08
9 0.1475 -3705.61 0.03 61.34 0.05
10 0.1476 -3709.98 -0.03 61.39 0.12
11 0.1477 -3713.44 -0.17 61.12 -0.13
12 0.1532 -3884.98 -0.03 61.60 0.11
13 0.1641 -4222.79 0.07 61.43 -0.09
14 0.2403 -6425.23 -0.04 44.80 -0.05
15 0.2652 -7014.11 -0.02 33.48 0.03
16 0.2653 -7016.69 -0.04 33.36 -0.02
17 0.2654 -7017.71 -0.11 33.39 0.04
18 0.3390 -8134.55 0.00 -12.58 -0.01
19 0.3416 -8154.43 0.04 -14.45 -0.02
20 0.3963 -8229.91 0.13 -55.95 -0.00
21 0.4045 -8184.22 0.03 -62.12 0.19
22 0.4155 -8099.58 0.04 -70.87 -0.05
23 0.9640 6890.12 0.04 -17.00 0.03
24 0.9805 6773.31 -0.02 -4.30 -0.03
25 1.0625 5363.15 0.04 47.94 -0.13
26 1.1251 3613.34 0.03 69.28 0.00
27 1.1415 3107.56 -0.03 71.51 0.01
28 1.2151 853.10 0.04 64.22 0.08
29 1.2753 -665.33 0.03 38.70 0.01
30 1.2947 -1041.86 -0.09 27.40 0.03
31 1.3575 -1767.80 0.03 -16.23 -0.03
32 1.3849 -1822.68 -0.06 -37.33 -0.07
33 2.0209 12915.82 0.00 34.90 0.05
34 2.1108 10771.45 -0.06 77.05 -0.02
35 2.1109 10769.80 0.05 77.09 0.02
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.
15GL54 quality flag:3 Type: 3:2E 3:2E 3:2E axisobj 39.311 39.328 39.294 ecceobj 0.237 0.238 0.236 incobj 1.248 1.248 1.248 qmin 29.386 29.365 29.410 qmax 50.233 50.282 50.208 amean 39.456 39.456 39.456 amin 38.947 38.916 38.962 amax 40.052 40.070 40.058 emean 0.240 0.240 0.239 emin 0.223 0.225 0.224 emax 0.256 0.256 0.255 imean 0.774 0.782 0.663 imin 0.295 0.244 0.200 imax 1.278 1.212 1.036 excite_mean 0.240 0.241 0.239 fracstop 1.000 1.000 1.000 cjmean 2.985 2.985 2.986 libcent 0 180.1 180.0 179.7 libamp 0 106.6 120.4 103.8 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 154.5 153.7 159.0 kozaiamp 180.0 180.0 180.0