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: 15VO169 # Created Mon Apr 28 01:10:42 2025 # Orbit generated from Bernstein formalism # Fitting 23 observations of 23 # Arc: 1.37y # First observation: 2015/09/12 # Last observation: 2017/01/26 Preliminary a, adot, b, bdot, g, gdot: -0.000155 0.023526 -0.000005 0.000749 0.023681 0.000000 # Chi-squared of fit: 2.80 DOF: 40 RMS: 0.06 # Min/Max residuals: -0.20 0.11 # Exact a, adot, b, bdot, g, gdot: 1.577884E-05 2.336076E-02 6.971635E-07 7.461517E-04 2.370441E-02 2.742737E-03 # Covariance matrix: 6.5844E-13 1.8100E-13 8.2485E-15 2.1666E-14 7.4765E-13 3.4857E-11 1.8100E-13 5.6097E-13 4.5750E-15 2.0665E-14 5.3404E-13 3.1222E-11 8.2485E-15 4.5750E-15 1.5065E-13 -1.5333E-13 1.1632E-14 4.6482E-13 2.1666E-14 2.0665E-14 -1.5333E-13 2.7197E-13 3.5678E-14 2.2403E-12 7.4765E-13 5.3404E-13 1.1632E-14 3.5678E-14 1.1251E-12 5.6201E-11 3.4857E-11 3.1222E-11 4.6482E-13 2.2403E-12 5.6201E-11 3.3656E-09 # lat0 lon0 xBary yBary zBary JD0 -3.392363 49.440546 0.875748 -0.029619 -0.502169 2457278.038539 # Heliocentric elements and errors Epoch: 2457270.5000 = 2015/09/05 Mean Anomaly: 50.67126 +/- 0.371 Argument of Peri: 235.85386 +/- 0.617 Long of Asc Node: 110.70850 +/- 0.017 Inclination: 3.77969 +/- 0.001 Eccentricity: 0.11324535 +/- 0.0023 Semi-Major Axis: 45.57460484 +/- 0.0238 Time of Perihelion: 2441452.8496 +/- 115.1 Perihelion: 40.41349260 +/- 0.1072 Aphelion: 50.73571708 +/- 0.1084 Period (y) 307.6753 +/- 0.24 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 28.37131577 +/- 0.0012 Ecliptic Y 31.80655976 +/- 0.0014 Ecliptic Z -2.49626157 +/- 0.0001 Ecliptic XDOT -0.00184277 +/- 0.0000 Ecliptic YDOT 0.00199213 +/- 0.0000 Ecliptic ZDOT 0.00006734 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 42.69449759 +/- 0.0013 Geocenter to KBO 42.18623547 +/- 0.0019 # Hcoef: 8.04
The following table shows the complete astrometric record for 15VO169. 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 (15VO169) followed by the observatory code and reference code for the source of the astrometry.
2015 09 12.53775 03 11 45.384 +14 19 21.93 24.9w 15VO169 568 C~2nw2 2015 10 08.48746 03 10 30.653 +14 12 54.78 24.3w 15VO169 568 C~2nw2 2015 11 06.30199 03 08 24.441 +14 03 43.70 24.4r 15VO169 568 C~2nw2 2015 11 06.36535 03 08 24.135 +14 03 42.52 24.6r 15VO169 568 C~2nw2 2015 11 06.43596 03 08 23.785 +14 03 40.98 24.5r 15VO169 568 C~2nw2 2015 11 06.50529 03 08 23.449 +14 03 39.76 24.4r 15VO169 568 C~2nw2 2015 11 07.52528 03 08 18.569 +14 03 19.74 24.2w 15VO169 568 C~2nw2 2015 11 17.29127 03 07 31.704 +14 00 12.80 24.6w 15VO169 568 C~2nw2 2015 11 17.34053 03 07 31.462 +14 00 11.90 24.5w 15VO169 568 C~2nw2 2015 12 13.35388 03 05 35.574 +13 53 10.08 24.5w 15VO169 568 C~2nw2 2015 12 13.41241 03 05 35.342 +13 53 09.27 24.4w 15VO169 568 C~2nw2 2016 01 01.40713 03 04 32.173 +13 50 01.74 24.4w 15VO169 568 C~2nw2 2016 01 07.35336 03 04 17.896 +13 49 30.23 24.4w 15VO169 568 C~2nw2 2016 02 04.28349 03 03 53.208 +13 50 14.70 24.4w 15VO169 568 C~2nw2 2016 09 07.54470 03 17 08.116 +14 43 40.86 15VO169 568 C~2nw2 2016 09 26.60873 03 16 26.044 +14 39 45.78 24.4w 15VO169 568 C~2nw2 2016 10 10.41976 03 15 38.785 +14 36 01.52 24.8w 15VO169 568 C~2nw2 2016 10 10.47844 03 15 38.549 +14 36 00.65 24.6w 15VO169 568 C~2nw2 2016 10 27.51997 03 14 26.066 +14 30 46.68 24.4w 15VO169 568 C~2nw2 2016 11 03.54499 03 13 53.252 +14 28 32.31 24.7w 15VO169 568 C~2nw2 2016 12 29.38526 03 09 54.679 +14 14 35.33 24.9w 15VO169 568 C~2nw2 2017 01 02.39267 03 09 43.570 +14 14 08.12 24.3w 15VO169 568 C~2nw2 2017 01 26.25843 03 09 05.852 +14 13 34.65 24.4w 15VO169 568 C~2nw2
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 -0.04
2 0.0710 -1150.37 -0.12 -82.32 0.02
3 0.1499 -3067.00 0.08 -118.62 0.03
4 0.1501 -3071.61 0.11 -118.56 0.08
5 0.1503 -3076.93 -0.03 -118.66 -0.05
6 0.1505 -3081.97 0.02 -118.51 0.08
7 0.1533 -3155.76 0.01 -118.58 -0.02
8 0.1800 -3863.11 0.06 -113.78 -0.02
9 0.1802 -3866.75 0.03 -113.69 -0.00
10 0.2514 -5605.87 0.05 -60.21 -0.01
11 0.2515 -5609.35 0.08 -60.07 -0.06
12 0.3035 -6546.30 -0.20 11.47 -0.03
13 0.3198 -6755.13 -0.01 38.26 0.02
14 0.3963 -7089.03 -0.05 179.90 -0.03
15 0.9884 4906.08 0.04 169.41 0.05
16 1.0406 4255.08 -0.01 102.22 0.05
17 1.0784 3534.11 -0.01 65.82 -0.11
18 1.0786 3530.58 -0.05 65.88 0.06
19 1.1252 2432.46 0.00 40.29 0.03
20 1.1444 1937.29 -0.02 36.72 0.07
21 1.2973 -1627.24 -0.04 155.00 -0.14
22 1.3083 -1790.13 0.03 172.24 -0.01
23 1.3736 -2327.34 0.05 287.74 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.
15VO169 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 46.091 46.175 46.012 ecceobj 0.122 0.129 0.116 incobj 3.781 3.781 3.781 qmin 39.589 39.474 39.806 qmax 52.133 52.463 51.751 amean 45.705 45.783 45.627 amin 45.324 45.401 45.254 amax 46.117 46.223 46.030 emean 0.117 0.122 0.111 emin 0.103 0.109 0.097 emax 0.131 0.135 0.124 imean 2.271 2.204 2.271 imin 1.754 1.732 1.757 imax 2.811 2.723 2.804 excite_mean 0.124 0.129 0.118 fracstop 1.000 1.000 1.000 cjmean 3.104 3.103 3.104 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 172.6 188.2 172.9 kozaiamp 179.9 180.0 179.9