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: 15KY173
# Created Fri Nov 22 02:10:22 2024
# Orbit generated from Bernstein formalism
# Fitting 30 observations of 30
# Arc: 2.50y
# First observation: 2015/02/25
# Last observation: 2017/08/26
Preliminary a, adot, b, bdot, g, gdot:
0.000068 0.027995 0.000000 0.000657 0.025245 0.000000
# WARNING -- MRQMIN stopped after 17 iterations
# Chi-squared of fit: 10.23 DOF: 54 RMS: 0.10
# Min/Max residuals: -0.24 0.29
# Exact a, adot, b, bdot, g, gdot:
1.741985E-05 2.746792E-02 1.034985E-06 6.394358E-04 2.475404E-02 -7.164756E-03
# Covariance matrix:
1.9892E-13 4.4454E-14 -1.5377E-14 8.5082E-15 1.5274E-13 1.7762E-12
4.4454E-14 4.8497E-13 -2.4977E-14 2.8805E-14 3.0340E-13 1.2114E-11
-1.5377E-14 -2.4977E-14 9.9884E-14 -5.8079E-14 -2.7710E-14 -5.8210E-13
8.5082E-15 2.8805E-14 -5.8079E-14 6.5047E-14 2.2409E-14 8.0354E-13
1.5274E-13 3.0340E-13 -2.7710E-14 2.2409E-14 3.0137E-13 7.5589E-12
1.7762E-12 1.2114E-11 -5.8210E-13 8.0354E-13 7.5589E-12 3.6375E-10
# lat0 lon0 xBary yBary zBary JD0
8.912646 -125.722969 0.964685 0.032366 -0.205578 2457079.141088
# Heliocentric elements and errors
Epoch: 2457070.5000 = 2015/02/17
Mean Anomaly: 338.67708 +/- 0.028
Argument of Peri: 135.04528 +/- 0.071
Long of Asc Node: 152.69887 +/- 0.003
Inclination: 8.99361 +/- 0.000
Eccentricity: 0.43556026 +/- 0.0007
Semi-Major Axis: 62.73229882 +/- 0.0461
Time of Perihelion: 2467819.7792 +/- 7.3
Perihelion: 35.40860248 +/- 0.0507
Aphelion: 90.05599516 +/- 0.0792
Period (y) 496.8726 +/- 0.55
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -24.20909937 +/- 0.0005
Ecliptic Y -32.00621520 +/- 0.0007
Ecliptic Z 6.25877281 +/- 0.0001
Ecliptic XDOT 0.00292631 +/- 0.0000
Ecliptic YDOT -0.00113495 +/- 0.0000
Ecliptic ZDOT -0.00005281 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 40.61589025 +/- 0.0006
Geocenter to KBO 40.39745301 +/- 0.0009
# Hcoef: 8.74
The following table shows the complete astrometric record for 15KY173. 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 (15KY173) followed by the observatory code and reference code for the source of the astrometry.
2015 02 25.64031 15 36 29.320 -10 11 19.59 25.9r 15KY173 568 C~2lVH 2015 03 19.63268 15 36 07.703 -10 05 06.16 24.7r 15KY173 568 C~2lVH 2015 03 22.55230 15 36 01.499 -10 04 08.26 24.8r 15KY173 568 C~2lVH 2015 04 13.56418 15 34 53.505 -09 56 20.53 24.7r 15KY173 568 C~2lVH 2015 04 13.60528 15 34 53.330 -09 56 19.70 24.2r 15KY173 568 C~2lVH 2015 04 18.57429 15 34 33.657 -09 54 31.17 24.3r 15KY173 568 C~2lVH 2015 05 21.33472 15 32 03.515 -09 43 43.54 24.4r 15KY173 568 C~2lVH 2015 05 21.37588 15 32 03.322 -09 43 42.82 24.6r 15KY173 568 C~2lVH 2015 05 21.41717 15 32 03.122 -09 43 42.19 25.0r 15KY173 568 C~2lVH 2015 05 22.49362 15 31 57.996 -09 43 24.55 24.5r 15KY173 568 C~2lVH 2015 05 22.51002 15 31 57.905 -09 43 24.27 24.7r 15KY173 568 C~2lVH 2015 05 25.48424 15 31 43.803 -09 42 37.23 24.8r 15KY173 568 C~2lVH 2015 06 20.37343 15 29 51.512 -09 37 51.27 25.1r 15KY173 568 C~2lVH 2015 06 20.41439 15 29 51.374 -09 37 51.04 24.8r 15KY173 568 C~2lVH 2015 06 23.43462 15 29 40.209 -09 37 33.93 25.0r 15KY173 568 C~2lVH 2015 07 11.31733 15 28 46.586 -09 37 10.45 25.1r 15KY173 568 C~2lVH 2015 08 11.34850 15 28 15.969 -09 41 46.85 24.6r 15KY173 568 C~2lVH 2016 04 03.51011 15 41 49.732 -10 20 06.77 25.3w 15KY173 568 C~2lVH 2016 04 08.55978 15 41 32.914 -10 18 19.47 25.1w 15KY173 568 C~2lVH 2016 04 29.44139 15 40 07.853 -10 10 57.70 25.4w 15KY173 568 C~2lVH 2016 05 04.37647 15 39 45.141 -10 09 18.41 24.9w 15KY173 568 C~2lVH 2016 05 30.49437 15 37 40.324 -10 01 55.45 25.3w 15KY173 568 C~2lVH 2016 07 04.30626 15 35 22.196 -09 57 43.63 23.9w 15KY173 568 C~2lVH 2016 07 05.37457 15 35 19.064 -09 57 43.58 24.9w 15KY173 568 C~2lVH 2017 03 28.60286 15 48 37.418 -10 42 26.12 25.0w 15KY173 568 C~2lVH 2017 07 28.29182 15 40 57.815 -10 20 00.38 15KY173 568 C~2lVH 2017 07 29.35266 15 40 56.672 -10 20 10.37 15KY173 568 C~2lVH 2017 08 19.26557 15 40 56.087 -10 24 52.36 25.5w 15KY173 568 C~2lVH 2017 08 25.27346 15 41 03.786 -10 26 41.34 24.8w 15KY173 568 C~2lVH 2017 08 26.25391 15 41 05.382 -10 26 59.96 24.9w 15KY173 568 C~2lVH
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 0.03 0.00 -0.13
2 0.0602 -398.34 -0.01 287.51 -0.08
3 0.0682 -501.05 0.09 322.12 0.04
4 0.1285 -1587.66 0.29 538.79 0.10
5 0.1286 -1590.37 0.10 538.98 -0.02
6 0.1422 -1898.53 0.13 575.45 0.09
7 0.2319 -4208.61 -0.09 675.64 -0.06
8 0.2320 -4211.55 -0.00 675.66 0.01
9 0.2321 -4214.58 0.02 675.56 -0.04
10 0.2351 -4292.42 0.14 674.56 0.00
11 0.2351 -4293.79 -0.03 674.51 -0.03
12 0.2432 -4507.58 -0.12 670.28 0.01
13 0.3141 -6189.24 -0.13 549.17 -0.08
14 0.3142 -6191.28 0.17 548.91 -0.04
15 0.3225 -6355.80 -0.13 525.74 -0.03
16 0.3715 -7131.89 -0.05 357.13 0.04
17 0.4564 -7504.84 -0.16 -20.77 0.07
18 1.1030 4722.22 -0.08 594.01 0.02
19 1.1168 4455.77 -0.12 640.79 0.09
20 1.1740 3131.41 -0.24 778.25 -0.02
21 1.1875 2782.09 -0.06 796.53 0.06
22 1.2590 886.16 -0.22 795.23 -0.11
23 1.3543 -1156.13 0.15 558.50 0.20
24 1.3572 -1201.10 0.12 547.60 0.08
25 2.0861 10890.90 -0.04 669.40 -0.06
26 2.4193 3975.22 -0.04 422.23 0.09
27 2.4222 3961.13 0.00 408.58 0.03
28 2.4795 4018.35 0.11 132.27 -0.05
29 2.4959 4154.21 0.10 52.67 -0.19
30 2.4986 4181.45 0.09 40.03 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.
15KY173 quality flag:3 Type: 3:1EE 3:1EE 3:1EE Type: 3:1II axisobj 62.128 62.240 62.018 ecceobj 0.433 0.435 0.432 incobj 9.006 9.006 9.006 qmin 34.488 34.397 34.218 qmax 92.498 92.800 92.590 amean 62.630 62.630 62.631 amin 61.720 61.670 61.782 amax 63.830 63.908 63.797 emean 0.437 0.438 0.439 emin 0.423 0.425 0.424 emax 0.450 0.452 0.453 imean 7.513 8.006 6.635 imin 7.026 7.875 5.713 imax 8.299 8.145 7.983 excite_mean 0.456 0.460 0.454 fracstop 1.000 1.000 1.000 cjmean 3.053 3.048 3.054 libcent 0 277.6 179.6 281.1 libamp 0 45.6 152.2 37.8 libcent 1 -180.0 -180.0 251.6 libamp 1 -180.0 -180.0 96.6 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 187.6 184.2 147.8 kozaiamp 62.9 180.0 32.0