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: 15VL170 # Created Tue Apr 23 01:17:40 2024 # Orbit generated from Bernstein formalism # Fitting 34 observations of 34 # Arc: 2.32y # First observation: 2015/08/20 # Last observation: 2017/12/13 Preliminary a, adot, b, bdot, g, gdot: -0.000132 0.025456 -0.000007 0.012859 0.026884 0.000000 # Chi-squared of fit: 6.46 DOF: 62 RMS: 0.08 # Min/Max residuals: -0.18 0.19 # Exact a, adot, b, bdot, g, gdot: 1.500996E-05 2.501564E-02 8.043210E-06 1.263932E-02 2.659144E-02 6.253078E-04 # Covariance matrix: 1.7506E-13 -4.0946E-14 -4.8371E-15 2.3514E-14 1.0753E-13 9.0641E-13 -4.0946E-14 2.8919E-13 -4.6083E-14 1.7442E-13 1.4411E-13 6.5264E-12 -4.8371E-15 -4.6083E-14 1.0577E-13 -1.0904E-13 -3.1329E-14 -1.5018E-12 2.3514E-14 1.7442E-13 -1.0904E-13 2.4083E-13 1.2456E-13 5.6839E-12 1.0753E-13 1.4411E-13 -3.1329E-14 1.2456E-13 2.0422E-13 4.6914E-12 9.0641E-13 6.5264E-12 -1.5018E-12 5.6839E-12 4.6914E-12 2.1268E-10 # lat0 lon0 xBary yBary zBary JD0 -1.589851 53.457974 1.012502 -0.001677 -0.065167 2457255.056669 # Heliocentric elements and errors Epoch: 2457250.5000 = 2015/08/16 Mean Anomaly: 356.59190 +/- 0.471 Argument of Peri: 0.30825 +/- 0.531 Long of Asc Node: 55.06233 +/- 0.000 Inclination: 26.81823 +/- 0.001 Eccentricity: 0.05948309 +/- 0.0000 Semi-Major Axis: 40.06045226 +/- 0.0024 Time of Perihelion: 2458127.2618 +/- 121.1 Perihelion: 37.67753276 +/- 0.0029 Aphelion: 42.44337176 +/- 0.0031 Period (y) 253.5607 +/- 0.02 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 23.23079497 +/- 0.0004 Ecliptic Y 29.65120537 +/- 0.0005 Ecliptic Z -1.04303901 +/- 0.0000 Ecliptic XDOT -0.00201147 +/- 0.0000 Ecliptic YDOT 0.00160789 +/- 0.0000 Ecliptic ZDOT 0.00129911 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 37.68224708 +/- 0.0005 Geocenter to KBO 37.60608457 +/- 0.0006 # Hcoef: 8.47
The following table shows the complete astrometric record for 15VL170. 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 (15VL170) followed by the observatory code and reference code for the source of the astrometry.
2015 08 20.55588 03 25 56.673 +17 05 52.18 24.5w 15VL170 568 C~2nw5 2015 09 07.60452 03 25 46.771 +17 06 42.85 24.6w 15VL170 568 C~2nw5 2015 09 12.45550 03 25 38.321 +17 06 36.20 24.7w 15VL170 568 C~2nw5 2015 10 07.50351 03 24 19.186 +17 04 00.53 24.4w 15VL170 568 C~2nw5 2015 10 07.56195 03 24 18.932 +17 03 59.91 24.5w 15VL170 568 C~2nw5 2015 10 09.54258 03 24 10.437 +17 03 40.15 24.5w 15VL170 568 C~2nw5 2015 11 06.33883 03 21 47.889 +16 57 50.27 24.1r 15VL170 568 C~2nw5 2015 11 06.40946 03 21 47.493 +16 57 49.51 24.4r 15VL170 568 C~2nw5 2015 11 06.47899 03 21 47.085 +16 57 48.54 24.0r 15VL170 568 C~2nw5 2015 11 07.49597 03 21 41.316 +16 57 33.92 24.4w 15VL170 568 C~2nw5 2015 11 17.47779 03 20 44.157 +16 55 12.97 24.3w 15VL170 568 C~2nw5 2015 11 17.56554 03 20 43.640 +16 55 11.78 24.2w 15VL170 568 C~2nw5 2015 12 06.34344 03 18 59.154 +16 51 06.72 24.4w 15VL170 568 C~2nw5 2015 12 06.48092 03 18 58.428 +16 51 05.14 24.3w 15VL170 568 C~2nw5 2015 12 31.35875 03 17 05.975 +16 47 34.94 24.3w 15VL170 568 C~2nw5 2016 01 07.39390 03 16 42.884 +16 47 11.34 24.3w 15VL170 568 C~2nw5 2016 01 08.24465 03 16 40.414 +16 47 09.69 24.5w 15VL170 568 C~2nw5 2016 02 04.37827 03 16 00.728 +16 48 54.24 24.4w 15VL170 568 C~2nw5 2016 02 11.24103 03 16 03.465 +16 50 10.36 24.6w 15VL170 568 C~2nw5 2016 09 07.59099 03 30 52.990 +18 10 20.77 24.5w 15VL170 568 C~2nw5 2016 09 27.52301 03 30 04.212 +18 09 32.39 24.5w 15VL170 568 C~2nw5 2016 10 05.50531 03 29 34.409 +18 08 38.48 24.8w 15VL170 568 C~2nw5 2016 10 07.50982 03 29 26.135 +18 08 22.05 24.3w 15VL170 568 C~2nw5 2016 10 07.60551 03 29 25.713 +18 08 21.06 24.5w 15VL170 568 C~2nw5 2016 10 09.51019 03 29 17.546 +18 08 04.74 24.4w 15VL170 568 C~2nw5 2016 10 09.58259 03 29 17.227 +18 08 04.09 24.4w 15VL170 568 C~2nw5 2016 11 02.47946 03 27 16.192 +18 03 35.47 24.6w 15VL170 568 C~2nw5 2016 11 04.45547 03 27 05.093 +18 03 09.61 24.6w 15VL170 568 C~2nw5 2016 12 28.44773 03 22 20.380 +17 52 47.27 24.4w 15VL170 568 C~2nw5 2017 01 27.29772 03 21 05.863 +17 52 17.03 24.5w 15VL170 568 C~2nw5 2017 09 15.55809 03 35 50.266 +19 13 33.84 15VL170 568 C~2nw5 2017 09 20.60688 03 35 38.251 +19 13 29.76 24.4w 15VL170 568 C~2nw5 2017 12 13.36234 03 28 41.066 +18 59 39.99 24.7w 15VL170 568 C~2nw5 2017 12 13.40466 03 28 40.842 +18 59 39.46 24.4w 15VL170 568 C~2nw5
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 -0.11
2 0.0494 -124.97 -0.13 84.28 -0.01
3 0.0627 -243.97 -0.08 107.89 0.12
4 0.1313 -1381.64 -0.01 239.64 0.03
5 0.1314 -1385.32 -0.05 239.95 -0.01
6 0.1369 -1508.22 0.04 251.26 -0.02
7 0.2130 -3575.48 -0.02 426.80 -0.02
8 0.2132 -3581.18 0.17 427.50 0.15
9 0.2133 -3587.09 0.06 428.05 0.19
10 0.2161 -3670.89 -0.06 434.84 -0.08
11 0.2435 -4500.33 -0.10 506.57 -0.04
12 0.2437 -4507.81 -0.18 507.31 0.05
13 0.2951 -6021.40 0.00 653.36 -0.06
14 0.2955 -6031.89 0.17 654.50 -0.06
15 0.3636 -7647.98 -0.00 867.43 -0.03
16 0.3829 -7974.86 0.07 930.56 -0.02
17 0.3852 -8009.60 0.01 938.17 -0.07
18 0.4595 -8533.67 0.03 1187.34 -0.10
19 0.4783 -8475.84 -0.03 1250.68 0.01
20 1.0514 5054.86 0.12 2715.37 -0.01
21 1.1060 4368.21 0.03 2836.60 -0.00
22 1.1279 3942.83 -0.04 2887.42 0.19
23 1.1333 3824.38 0.18 2900.16 0.01
24 1.1336 3818.30 0.01 2900.66 -0.13
25 1.1388 3701.37 -0.01 2913.16 0.04
26 1.1390 3696.80 0.04 2913.64 0.03
27 1.2044 1957.33 -0.05 3075.54 0.04
28 1.2099 1797.52 0.06 3089.44 -0.02
29 1.3577 -2292.45 0.03 3499.93 -0.03
30 1.4394 -3329.63 -0.12 3740.20 -0.04
31 2.0726 10069.26 -0.01 5398.33 -0.00
32 2.0864 9902.47 -0.03 5434.29 -0.01
33 2.3157 3953.87 0.00 6043.59 0.03
34 2.3158 3950.65 -0.07 6043.85 -0.03
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.
15VL170 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 40.409 40.419 40.399 ecceobj 0.067 0.067 0.066 incobj 26.731 26.731 26.732 qmin 36.901 36.991 36.945 qmax 43.432 43.489 43.487 amean 40.123 40.115 40.111 amin 39.813 39.802 39.785 amax 40.446 40.447 40.442 emean 0.062 0.063 0.063 emin 0.050 0.051 0.050 emax 0.075 0.076 0.076 imean 25.508 25.502 25.503 imin 25.061 25.058 25.057 imax 26.010 25.997 25.999 excite_mean 0.435 0.435 0.435 fracstop 1.000 1.000 1.000 cjmean 2.831 2.831 2.831 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 169.3 169.3 169.4 kozaiamp 180.0 179.9 180.0