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: 15VA171 # Created Mon Apr 28 01:10:42 2025 # Orbit generated from Bernstein formalism # Fitting 30 observations of 30 # Arc: 3.07y # First observation: 2014/11/19 # Last observation: 2017/12/16 Preliminary a, adot, b, bdot, g, gdot: 0.000048 0.023333 -0.000001 -0.000379 0.024012 0.000000 # Chi-squared of fit: 10.76 DOF: 54 RMS: 0.11 # Min/Max residuals: -0.37 0.20 # Exact a, adot, b, bdot, g, gdot: 1.516778E-05 2.353880E-02 -1.872223E-07 -3.817492E-04 2.419468E-02 7.549984E-04 # Covariance matrix: 5.3715E-13 -5.6088E-13 -3.3296E-15 6.2792E-15 -2.4091E-13 -5.2737E-12 -5.6088E-13 7.3555E-13 4.9672E-15 -9.2934E-15 3.4488E-13 7.8131E-12 -3.3296E-15 4.9672E-15 2.3380E-13 -1.1087E-13 2.3481E-15 5.7633E-14 6.2792E-15 -9.2934E-15 -1.1087E-13 6.6831E-14 -5.2172E-15 -1.0934E-13 -2.4091E-13 3.4488E-13 2.3481E-15 -5.2172E-15 3.2406E-13 4.2968E-12 -5.2737E-12 7.8131E-12 5.7633E-14 -1.0934E-13 4.2968E-12 9.1759E-11 # lat0 lon0 xBary yBary zBary JD0 -0.791633 48.933370 -0.130120 -0.013395 -0.980286 2456980.794628 # Heliocentric elements and errors Epoch: 2456980.5000 = 2014/11/19 Mean Anomaly: 62.67658 +/- 0.211 Argument of Peri: 153.39110 +/- 0.256 Long of Asc Node: 189.28457 +/- 0.020 Inclination: 1.20728 +/- 0.000 Eccentricity: 0.03625913 +/- 0.0004 Semi-Major Axis: 42.98056399 +/- 0.0031 Time of Perihelion: 2439061.6802 +/- 60.2 Perihelion: 41.42212621 +/- 0.0167 Aphelion: 44.53900177 +/- 0.0168 Period (y) 281.7840 +/- 0.03 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 27.69230671 +/- 0.0006 Ecliptic Y 31.98479182 +/- 0.0007 Ecliptic Z -0.57106642 +/- 0.0000 Ecliptic XDOT -0.00195677 +/- 0.0000 Ecliptic YDOT 0.00180881 +/- 0.0000 Ecliptic ZDOT -0.00004427 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 42.31095456 +/- 0.0007 Geocenter to KBO 41.33139873 +/- 0.0010 # Hcoef: 8.91
The following table shows the complete astrometric record for 15VA171. 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 (15VA171) followed by the observatory code and reference code for the source of the astrometry.
2014 11 19.29385 03 06 49.029 +16 41 24.97 25.3r 15VA171 568 C~2nw8 2014 11 23.39737 03 06 29.190 +16 40 04.19 26.0r 15VA171 568 C~2nw8 2015 09 07.63311 03 16 51.370 +17 20 49.27 25.8w 15VA171 568 C~2nw8 2015 09 12.49674 03 16 43.557 +17 20 12.92 25.1w 15VA171 568 C~2nw8 2015 10 07.54436 03 15 32.718 +17 15 10.56 25.0w 15VA171 568 C~2nw8 2015 10 09.58362 03 15 24.997 +17 14 38.60 25.0w 15VA171 568 C~2nw8 2015 11 07.33788 03 13 15.863 +17 05 55.18 24.8r 15VA171 568 C~2nw8 2015 11 07.38006 03 13 15.660 +17 05 54.44 24.9r 15VA171 568 C~2nw8 2015 11 07.42224 03 13 15.441 +17 05 53.58 25.1r 15VA171 568 C~2nw8 2015 12 06.36096 03 10 56.546 +16 56 43.34 24.9w 15VA171 568 C~2nw8 2016 01 01.34872 03 09 20.177 +16 50 32.12 25.4w 15VA171 568 C~2nw8 2016 01 08.25624 03 09 02.694 +16 49 27.33 25.4w 15VA171 568 C~2nw8 2016 02 05.28768 03 08 36.617 +16 48 09.03 25.2w 15VA171 568 C~2nw8 2016 02 10.30807 03 08 40.009 +16 48 27.75 24.8w 15VA171 568 C~2nw8 2016 09 07.62568 03 22 13.705 +17 39 54.47 15VA171 568 C~2nw8 2016 09 26.58416 03 21 32.696 +17 36 57.20 25.9w 15VA171 568 C~2nw8 2016 10 09.54522 03 20 48.574 +17 33 58.06 25.3w 15VA171 568 C~2nw8 2016 10 09.61729 03 20 48.294 +17 33 57.06 25.0w 15VA171 568 C~2nw8 2016 11 02.52573 03 19 02.866 +17 27 01.08 25.4w 15VA171 568 C~2nw8 2016 11 04.40084 03 18 53.789 +17 26 25.54 25.2w 15VA171 568 C~2nw8 2016 12 24.31334 03 15 07.243 +17 12 00.47 25.1w 15VA171 568 C~2nw8 2017 01 02.41556 03 14 38.693 +17 10 15.74 25.4w 15VA171 568 C~2nw8 2017 01 26.32908 03 13 57.303 +17 07 56.06 26.0w 15VA171 568 C~2nw8 2017 09 15.58856 03 27 25.108 +17 57 33.87 25.4w 15VA171 568 C~2nw8 2017 09 17.60038 03 27 21.057 +17 57 16.71 25.4w 15VA171 568 C~2nw8 2017 09 22.57478 03 27 09.590 +17 56 28.87 25.1w 15VA171 568 C~2nw8 2017 09 23.57901 03 27 07.059 +17 56 18.47 15VA171 568 C~2nw8 2017 09 23.58734 03 27 07.038 +17 56 18.48 15VA171 568 C~2nw8 2017 09 24.59522 03 27 04.375 +17 56 07.53 25.7w 15VA171 568 C~2nw8 2017 12 16.39181 03 21 03.596 +17 33 21.58 27.0w 15VA171 568 C~2nw8
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 0.04 0.00 -0.01
2 0.0112 -296.29 -0.06 0.11 0.03
3 0.8004 8962.62 0.02 -25.26 -0.02
4 0.8137 8844.92 -0.11 -31.21 0.10
5 0.8823 7784.90 -0.18 -57.92 0.13
6 0.8879 7669.62 0.00 -59.77 0.05
7 0.9666 5744.39 -0.00 -76.85 -0.14
8 0.9667 5741.38 0.12 -76.79 -0.09
9 0.9668 5738.12 -0.01 -76.79 -0.10
10 1.0460 3670.28 0.11 -76.49 -0.19
11 1.1172 2237.95 0.19 -62.28 0.02
12 1.1361 1978.74 0.04 -56.91 0.01
13 1.2129 1597.06 0.04 -31.06 0.07
14 1.2266 1649.02 -0.25 -26.22 0.04
15 1.8024 13727.70 0.16 -104.02 -0.05
16 1.8543 13113.10 0.10 -126.56 -0.12
17 1.8898 12454.88 -0.06 -138.92 0.06
18 1.8900 12450.73 -0.00 -138.87 0.17
19 1.9555 10881.32 -0.09 -153.94 0.16
20 1.9606 10746.29 -0.01 -154.79 0.03
21 2.0972 7382.29 -0.01 -145.65 0.02
22 2.1222 6959.50 0.12 -139.12 -0.05
23 2.1876 6349.79 -0.12 -117.43 0.04
24 2.8235 18326.21 0.20 -191.86 -0.08
25 2.8290 18265.49 -0.09 -194.22 0.02
26 2.8427 18093.78 -0.37 -200.15 -0.03
27 2.8454 18055.93 0.09 -201.30 -0.03
28 2.8454 18055.64 0.14 -201.21 0.06
29 2.8482 18015.80 -0.01 -202.42 -0.02
30 3.0749 12654.01 0.00 -229.21 -0.04
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.
15VA171 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.316 43.326 43.306 ecceobj 0.044 0.044 0.043 incobj 1.202 1.202 1.202 qmin 40.240 40.254 40.261 qmax 45.909 45.938 45.909 amean 42.988 42.998 42.978 amin 42.657 42.660 42.645 amax 43.334 43.337 43.322 emean 0.043 0.044 0.043 emin 0.022 0.022 0.021 emax 0.060 0.060 0.060 imean 2.892 2.888 2.895 imin 1.786 1.788 1.786 imax 3.647 3.643 3.650 excite_mean 0.067 0.067 0.066 fracstop 1.000 1.000 1.000 cjmean 3.084 3.084 3.084 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 179.5 180.0 179.7 kozaiamp 179.9 180.0 180.0