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: 15VP169
# Created Mon Apr 28 01:10:42 2025
# Orbit generated from Bernstein formalism
# Fitting 23 observations of 24
# Arc: 1.44y
# First observation: 2015/08/20
# Last observation: 2017/01/27
Preliminary a, adot, b, bdot, g, gdot:
-0.000106 0.020929 0.000001 0.001303 0.022662 0.000000
# Chi-squared of fit: 5.27 DOF: 40 RMS: 0.08
# Min/Max residuals: -0.32 0.25
# Exact a, adot, b, bdot, g, gdot:
1.509410E-05 2.061232E-02 1.020444E-06 1.287286E-03 2.246836E-02 1.265331E-03
# Covariance matrix:
3.7829E-13 5.6024E-14 -7.4455E-15 3.5170E-14 4.0101E-13 1.8583E-11
5.6024E-14 5.9235E-13 -1.1351E-14 5.6645E-14 4.7969E-13 2.9842E-11
-7.4455E-15 -1.1351E-14 1.6099E-13 -1.6291E-13 -1.6502E-14 -1.0299E-12
3.5170E-14 5.6645E-14 -1.6291E-13 2.7307E-13 8.0095E-14 5.1684E-12
4.0101E-13 4.7969E-13 -1.6502E-14 8.0095E-14 7.9542E-13 4.2257E-11
1.8583E-11 2.9842E-11 -1.0299E-12 5.1684E-12 4.2257E-11 2.7220E-09
# lat0 lon0 xBary yBary zBary JD0
0.341065 54.722136 1.013710 0.000384 -0.042570 2457255.041279
# Heliocentric elements and errors
Epoch: 2457250.5000 = 2015/08/16
Mean Anomaly: 138.97626 +/- 1.967
Argument of Peri: 222.35781 +/- 1.959
Long of Asc Node: 47.99633 +/- 0.002
Inclination: 3.59869 +/- 0.001
Eccentricity: 0.05734868 +/- 0.0014
Semi-Major Axis: 42.65594657 +/- 0.0086
Time of Perihelion: 2417967.3853 +/- 555.8
Perihelion: 40.20968447 +/- 0.0602
Aphelion: 45.10220867 +/- 0.0604
Period (y) 278.5977 +/- 0.08
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 26.55229004 +/- 0.0010
Ecliptic Y 35.78231604 +/- 0.0014
Ecliptic Z 0.26500590 +/- 0.0000
Ecliptic XDOT -0.00196393 +/- 0.0000
Ecliptic YDOT 0.00156934 +/- 0.0000
Ecliptic ZDOT 0.00015783 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 44.55859598 +/- 0.0013
Geocenter to KBO 44.50703384 +/- 0.0018
# Hcoef: 8.16
The following table shows the complete astrometric record for 15VP169. 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 (15VP169) followed by the observatory code and reference code for the source of the astrometry.
2015 08 20.54049 03 29 06.442 +19 16 48.10 25.0w 15VP169 568 C~2nw2 2015 09 07.59637 03 29 00.621 +19 16 49.76 25.0w 15VP169 568 C~2nw2 2015 09 12.44325 03 28 54.096 +19 16 32.39 25.2w 15VP169 568 C~2nw2 2015 10 07.55020 03 27 49.680 +19 13 11.70 25.0w 15VP169 568 C~2nw2 2015 11 06.30734 03 25 44.164 +19 06 08.48 24.7r 15VP169 568 C~2nw2 2015 11 06.37060 03 25 43.874 +19 06 07.55 24.5r 15VP169 568 C~2nw2 2015 11 06.44142 03 25 43.520 +19 06 06.23 24.5r 15VP169 568 C~2nw2 2015 11 07.46098 03 25 38.671 +19 05 49.68 24.6w 15VP169 568 C~2nw2 2015 11 17.48946 03 24 50.459 +19 03 02.42 24.5w 15VP169 568 C~2nw2 2015 12 06.30809 03 23 22.128 +18 57 51.00 24.7w 15VP169 568 C~2nw2 2015 12 06.43481 03 23 21.591 +18 57 48.97 25.1w 15VP169 568 C~2nw2 2015 12 31.32982 03 21 45.820 +18 52 06.36 25.0w 15VP169 568 C~2nw2 2016 01 07.35914 03 21 26.017 +18 50 55.14 24.9w 15VP169 568 C~2nw2 2016 02 05.30505 03 20 49.158 +18 48 44.87 23.6w 15VP169 568 C~2nw2 2016 02 11.25843 03 20 51.257 +18 48 53.89 25.1w 15VP169 568 C~2nw2 2016 09 07.61990 03 33 48.321 +19 38 12.55 15VP169 568 C~2nw2 2016 09 25.62935 03 33 14.543 +19 36 39.18 25.0w 15VP169 568 C~2nw2 2016 09 27.54346 03 33 09.400 +19 36 23.76 25.4w 15VP169 568 C~2nw2 2016 10 10.56895 03 32 27.420 +19 34 13.66 24.9w 15VP169 568 C~2nw2 2016 10 10.61736 03 32 27.234 +19 34 13.01 24.7w 15VP169 568 C~2nw2 2016 11 02.46775 03 30 50.756 +19 28 59.75 25.1w 15VP169 568 C~2nw2 2016 11 04.44390 03 30 41.517 +19 28 29.00 24.8w 15VP169 568 C~2nw2 2016 12 29.39711 03 26 38.972 +19 14 37.84 25.3w 15VP169 568 C~2nw2 2017 01 27.32921 03 25 38.227 +19 11 03.92 24.7w 15VP169 568 C~2nw2
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 -0.12 0.00 -0.02
2 0.0494 -79.53 0.07 21.67 0.03
3 0.0627 -173.37 0.07 27.33 0.01
4 0.1314 -1106.99 -0.03 55.70 -0.01
5 0.2129 -2935.06 0.05 84.15 -0.07
6 0.2131 -2939.27 0.25 84.27 -0.03
7 0.2133 -2944.46 0.03 84.24 -0.15
8 0.2161 -3015.16 -0.05 85.26 0.01
9 0.2435 -3718.95 -0.32 93.28 0.14
10 0.2951 -5010.33 -0.02 105.36 0.00
11 0.2954 -5018.21 ( 0.51) 105.31 ( -0.16)
12 0.3636 -6420.75 0.04 116.87 0.00
13 0.3828 -6711.02 0.03 119.31 0.05
14 0.4621 -7250.86 0.00 126.46 0.03
15 0.4784 -7219.70 0.02 127.59 0.00
16 1.0516 4179.02 0.01 289.80 0.05
17 1.1009 3693.07 0.11 312.27 0.08
18 1.1061 3618.79 -0.01 314.56 0.09
19 1.1418 3011.47 0.00 329.49 0.00
20 1.1419 3008.76 -0.09 329.49 -0.06
21 1.2045 1609.31 -0.11 352.44 0.01
22 1.2099 1475.09 0.09 354.09 -0.07
23 1.3603 -2056.52 -0.02 385.55 -0.08
24 1.4395 -2943.25 0.01 391.26 -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.
15VP169 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.041 43.076 43.009 ecceobj 0.055 0.059 0.051 incobj 3.583 3.583 3.583 qmin 39.712 39.557 39.827 qmax 45.939 46.190 45.768 amean 42.736 42.772 42.704 amin 42.408 42.437 42.370 amax 43.075 43.124 43.051 emean 0.047 0.051 0.043 emin 0.023 0.027 0.020 emax 0.067 0.071 0.064 imean 2.021 1.997 2.035 imin 0.663 0.610 0.684 imax 3.124 3.131 3.119 excite_mean 0.060 0.063 0.057 fracstop 1.000 1.000 1.000 cjmean 3.082 3.082 3.082 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 195.1 195.0 194.9 kozaiamp 180.0 180.0 179.9