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: 15KJ172
# Created Fri Nov 22 02:10:22 2024
# Orbit generated from Bernstein formalism
# Fitting 19 observations of 19
# Arc: 1.36y
# First observation: 2015/02/23
# Last observation: 2016/07/04
Preliminary a, adot, b, bdot, g, gdot:
-0.001407 0.212641 -0.000459 -0.040238 0.115928 0.000000
# Chi-squared of fit: 8.39 DOF: 32 RMS: 0.12
# Min/Max residuals: -0.34 0.27
# Exact a, adot, b, bdot, g, gdot:
3.032530E-05 2.153967E-01 -6.648074E-06 -4.257240E-02 1.144262E-01 1.410922E-01
# Covariance matrix:
3.7073E-13 9.8637E-13 -1.1975E-15 -2.6055E-13 6.5216E-13 5.8643E-12
9.8637E-13 3.0165E-11 4.6906E-13 -7.0808E-12 1.0676E-11 1.5659E-10
-1.1975E-15 4.6906E-13 1.6356E-13 -2.7072E-13 1.4080E-13 2.4761E-12
-2.6055E-13 -7.0808E-12 -2.7072E-13 1.9933E-12 -2.5170E-12 -3.7153E-11
6.5216E-13 1.0676E-11 1.4080E-13 -2.5170E-12 4.1596E-12 5.5809E-11
5.8643E-12 1.5659E-10 2.4761E-12 -3.7153E-11 5.5809E-11 8.2156E-10
# lat0 lon0 xBary yBary zBary JD0
5.969394 -123.651079 0.976672 0.014546 -0.137881 2457077.136848
# Heliocentric elements and errors
Epoch: 2457070.5000 = 2015/02/17
Mean Anomaly: 42.51556 +/- 0.011
Argument of Peri: 52.02092 +/- 0.005
Long of Asc Node: 80.50175 +/- 0.000
Inclination: 11.39999 +/- 0.000
Eccentricity: 0.47550426 +/- 0.0001
Semi-Major Axis: 10.87325987 +/- 0.0015
Time of Perihelion: 2455523.8805 +/- 0.2
Perihelion: 5.70297852 +/- 0.0013
Aphelion: 16.04354123 +/- 0.0024
Period (y) 35.8548 +/- 0.01
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -5.70912477 +/- 0.0001
Ecliptic Y -6.80914753 +/- 0.0001
Ecliptic Z 0.90881542 +/- 0.0000
Ecliptic XDOT 0.00236727 +/- 0.0000
Ecliptic YDOT -0.00574460 +/- 0.0000
Ecliptic ZDOT -0.00066192 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 8.93221927 +/- 0.0001
Geocenter to KBO 8.73925999 +/- 0.0002
# Hcoef: 14.88
The following table shows the complete astrometric record for 15KJ172. 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 (15KJ172) followed by the observatory code and reference code for the source of the astrometry.
2015 02 23.63607 15 41 52.517 -13 31 38.49 24.5r 15KJ172 568 C~2ji8 2015 03 19.60407 15 41 38.135 -13 24 06.78 24.8r 15KJ172 568 C~2ji8 2015 03 22.51769 15 41 18.829 -13 22 23.26 24.5r 15KJ172 568 C~2ji8 2015 04 12.50860 15 37 20.727 -13 06 18.24 24.4r 15KJ172 568 C~2ji8 2015 04 12.54955 15 37 20.103 -13 06 16.04 24.3r 15KJ172 568 C~2ji8 2015 05 17.37006 15 26 38.168 -12 35 18.13 24.2r 15KJ172 568 C~2ji8 2015 05 17.41677 15 26 37.233 -12 35 15.82 24.2r 15KJ172 568 C~2ji8 2015 05 17.45892 15 26 36.370 -12 35 13.82 24.4r 15KJ172 568 C~2ji9 2015 05 24.36087 15 24 20.588 -12 30 12.92 24.6r 15KJ172 568 C~2ji9 2015 05 24.40713 15 24 19.689 -12 30 10.99 24.3r 15KJ172 568 C~2ji9 2015 05 24.44802 15 24 18.854 -12 30 09.48 24.3r 15KJ172 568 C~2ji9 2015 05 26.43568 15 23 40.556 -12 28 51.49 24.4r 15KJ172 568 C~2ji9 2016 04 03.59570 16 24 47.940 -17 50 25.81 25.2w 15KJ172 568 C~2ji9 2016 04 09.58916 16 23 52.286 -17 48 29.26 25.7w 15KJ172 568 C~2ji9 2016 04 29.53818 16 19 22.867 -17 39 52.70 25.3w 15KJ172 568 C~2ji9 2016 05 04.46587 16 18 00.422 -17 37 25.05 23.7w 15KJ172 568 C~2ji9 2016 05 04.51055 16 17 59.641 -17 37 23.63 24.9w 15KJ172 568 C~2ji9 2016 05 30.50656 16 09 56.815 -17 24 27.03 25.0w 15KJ172 568 C~2ji9 2016 07 04.33867 16 00 31.192 -17 15 26.20 25.9w 15KJ172 568 C~2ji9
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 0.16
2 0.0656 -306.79 0.10 392.35 0.05
3 0.0736 -604.67 0.03 429.18 -0.02
4 0.1311 -4210.50 -0.09 571.70 -0.05
5 0.1312 -4219.88 0.02 571.73 0.02
6 0.2265 -13800.93 -0.03 158.79 -0.22
7 0.2266 -13814.83 0.14 157.72 -0.03
8 0.2268 -13827.63 0.04 156.61 -0.03
9 0.2457 -15839.75 0.03 -33.87 0.01
10 0.2458 -15853.06 0.27 -35.20 0.14
11 0.2459 -15865.36 -0.06 -36.72 -0.08
12 0.2513 -16431.78 -0.34 -98.01 0.04
13 1.1087 40068.10 0.15 -7750.02 -0.01
14 1.1251 39235.15 -0.11 -7774.00 -0.12
15 1.1797 35227.37 0.23 -7951.82 0.08
16 1.1932 34007.81 -0.18 -8021.21 0.03
17 1.1934 33996.27 -0.10 -8021.85 0.11
18 1.2645 26912.36 0.03 -8557.70 -0.08
19 1.3599 18764.24 -0.02 -9638.30 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.
15KJ172 quality flag:3 Type: CENTAURR CENTAURR CENTAURR axisobj 10.771 10.773 10.769 ecceobj 0.468 0.468 0.468 incobj 11.389 11.388 11.389 qmin 5.666 5.511 5.712 qmax 16.856 26.600 22.941 amean 10.743 13.775 12.464 amin 10.197 10.773 10.769 amax 11.261 16.489 14.353 emean 0.467 0.554 0.534 emin 0.436 0.468 0.468 emax 0.497 0.632 0.598 imean 10.183 9.354 10.077 imin 10.006 8.346 9.998 imax 10.295 10.480 10.226 excite_mean 0.499 0.577 0.562 fracstop 0.000 0.002 0.000 cjmean 3.842 3.319 3.509 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 60.5 147.3 62.5 kozaiamp 12.9 172.8 14.4