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: 15QL14 # Created Tue Jan 21 02:10:38 2025 # Orbit generated from Bernstein formalism # Fitting 16 observations of 16 # Arc: 2.27y # First observation: 2015/08/16 # Last observation: 2017/11/23 Preliminary a, adot, b, bdot, g, gdot: 0.000065 0.023738 0.000017 0.000822 0.024144 0.000000 # Chi-squared of fit: 52.56 DOF: 26 RMS: 0.32 # Min/Max residuals: -0.61 0.59 # Exact a, adot, b, bdot, g, gdot: 1.730737E-05 2.425979E-02 3.493282E-06 8.602726E-04 2.455779E-02 -2.800616E-03 # Covariance matrix: 2.3698E-13 -2.3148E-13 4.0620E-15 -1.1605E-14 -3.4780E-14 -1.9225E-12 -2.3148E-13 1.2112E-12 -5.8627E-14 1.1285E-13 6.8605E-13 2.3172E-11 4.0620E-15 -5.8627E-14 2.2981E-13 -1.4598E-13 -4.5850E-14 -1.3006E-12 -1.1605E-14 1.1285E-13 -1.4598E-13 1.6239E-13 5.6989E-14 2.4194E-12 -3.4780E-14 6.8605E-13 -4.5850E-14 5.6989E-14 6.4188E-13 1.5504E-11 -1.9225E-12 2.3172E-11 -1.3006E-12 2.4194E-12 1.5504E-11 5.0702E-10 # lat0 lon0 xBary yBary zBary JD0 -12.291411 -53.757728 -0.291623 -0.206891 -0.950258 2457250.675709 # Heliocentric elements and errors Epoch: 2457250.5000 = 2015/08/16 Mean Anomaly: 297.04711 +/- 0.048 Argument of Peri: 355.36417 +/- 0.122 Long of Asc Node: 26.32908 +/- 0.004 Inclination: 12.19828 +/- 0.000 Eccentricity: 0.11381367 +/- 0.0009 Semi-Major Axis: 43.43872559 +/- 0.0116 Time of Perihelion: 2475536.8580 +/- 12.0 Perihelion: 38.49480472 +/- 0.0418 Aphelion: 48.38264647 +/- 0.0425 Period (y) 286.3016 +/- 0.11 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 24.32923810 +/- 0.0008 Ecliptic Y -32.70112248 +/- 0.0010 Ecliptic Z -8.66854242 +/- 0.0003 Ecliptic XDOT 0.00201104 +/- 0.0000 Ecliptic YDOT 0.00182220 +/- 0.0000 Ecliptic ZDOT 0.00016023 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 41.67035956 +/- 0.0009 Geocenter to KBO 40.72027146 +/- 0.0013 # Hcoef: 6.97
The following table shows the complete astrometric record for 15QL14. 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 (15QL14) followed by the observatory code and reference code for the source of the astrometry.
2015 08 16.17492 20 48 34.362 -30 34 57.41 23.2r 15QL14 807 C~2Z6n 2015 08 18.04935 20 48 24.646 -30 35 20.54 23.2r 15QL14 807 C~2Z6n 2015 08 18.11161 20 48 24.332 -30 35 21.56 23.1r 15QL14 807 C~2Z6n 2015 08 18.17929 20 48 23.958 -30 35 21.97 23.1r 15QL14 807 C~2Z6n 2015 10 16.07056 20 45 06.631 -30 33 35.05 15QL14 304 C~2Z6n 2015 10 16.14502 20 45 06.581 -30 33 33.11 15QL14 304 C~2Z6n 2016 05 10.37493 21 00 28.109 -29 33 08.21 23.2r 15QL14 304 C~2Z6n 2016 09 25.00291 20 51 47.837 -30 11 54.57 15QL14 304 C~2Z6n 2016 09 25.08750 20 51 47.585 -30 11 54.21 15QL14 304 C~2Z6n 2016 09 26.01104 20 51 44.946 -30 11 49.15 15QL14 304 C~2Z6n 2016 11 02.06076 20 51 09.432 -30 02 42.93 15QL14 304 C~2Z6n 2017 04 22.42292 21 05 59.532 -29 01 33.25 23.0r 15QL14 304 C~2Z6n 2017 04 23.42145 21 06 01.804 -29 01 41.28 23.1r 15QL14 304 C~2Z6n 2017 04 26.41798 21 06 07.967 -29 02 09.18 15QL14 304 C~2Z6n 2017 11 22.03564 20 57 45.608 -29 27 57.64 23.2r 15QL14 304 C~2Z6n 2017 11 23.02673 20 57 48.600 -29 27 28.79 23.2r 15QL14 304 C~2Z6n
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 -0.35 0.00 -0.61
2 0.0051 -127.01 0.22 12.00 -0.19
3 0.0053 -131.19 0.32 12.12 -0.46
4 0.0055 -135.95 0.22 13.05 0.00
5 0.1667 -2561.55 -0.30 802.29 -0.07
6 0.1669 -2561.65 0.02 804.33 0.59
7 0.7343 9946.38 -0.38 907.78 0.16
8 1.1111 2788.35 0.16 636.51 0.36
9 1.1113 2785.32 0.14 637.77 0.27
10 1.1139 2753.88 -0.04 652.21 0.18
11 1.2153 2463.95 -0.20 1305.44 0.33
12 1.6845 14669.99 0.39 1398.00 0.26
13 1.6872 14695.97 0.36 1381.11 0.35
14 1.6954 14764.53 -0.55 1329.44 -0.21
15 2.2693 8007.74 -0.03 1831.46 -0.42
16 2.2720 8053.62 0.00 1847.65 -0.56
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.
15QL14 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 43.563 43.591 43.535 ecceobj 0.119 0.121 0.117 incobj 12.202 12.202 12.202 qmin 36.516 37.742 34.743 qmax 51.464 50.191 53.389 amean 43.686 43.726 43.685 amin 43.235 43.313 43.207 amax 44.250 44.205 44.312 emean 0.131 0.117 0.168 emin 0.096 0.096 0.108 emax 0.165 0.135 0.206 imean 11.320 11.632 11.299 imin 10.262 10.867 10.226 imax 12.320 12.450 12.539 excite_mean 0.236 0.233 0.259 fracstop 1.000 1.000 1.000 cjmean 3.030 3.032 3.017 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 176.3 180.6 177.9 kozaiamp 179.9 180.0 180.0