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: 15VT173 # Created Tue Apr 1 01:10:43 2025 # Orbit generated from Bernstein formalism # Fitting 24 observations of 24 # Arc: 2.28y # First observation: 2015/09/06 # Last observation: 2017/12/16 Preliminary a, adot, b, bdot, g, gdot: -0.000066 0.024100 -0.000004 -0.000261 0.024294 0.000000 # Chi-squared of fit: 14.49 DOF: 42 RMS: 0.14 # Min/Max residuals: -0.32 0.33 # Exact a, adot, b, bdot, g, gdot: 1.532478E-05 2.389382E-02 -1.768203E-07 -2.589093E-04 2.417121E-02 4.436921E-04 # Covariance matrix: 2.4693E-13 -3.7932E-14 4.4785E-15 -2.0084E-15 1.8096E-13 1.7939E-12 -3.7932E-14 4.7353E-13 6.5498E-15 -1.1321E-14 2.4559E-13 1.1322E-11 4.4785E-15 6.5498E-15 1.2873E-13 -9.2541E-14 9.0967E-15 2.1344E-13 -2.0084E-15 -1.1321E-14 -9.2541E-14 1.2497E-13 -8.2844E-15 -3.6741E-13 1.8096E-13 2.4559E-13 9.0967E-15 -8.2844E-15 3.5800E-13 8.0067E-12 1.7939E-12 1.1322E-11 2.1344E-13 -3.6741E-13 8.0067E-12 3.6739E-10 # lat0 lon0 xBary yBary zBary JD0 -3.427369 50.697364 0.931595 -0.023373 -0.392745 2457272.132469 # Heliocentric elements and errors Epoch: 2457270.5000 = 2015/09/05 Mean Anomaly: 349.97416 +/- 1.334 Argument of Peri: 268.99949 +/- 1.427 Long of Asc Node: 151.14701 +/- 0.014 Inclination: 3.46665 +/- 0.000 Eccentricity: 0.03292557 +/- 0.0001 Semi-Major Axis: 43.17008969 +/- 0.0035 Time of Perihelion: 2460155.7995 +/- 383.9 Perihelion: 41.74869003 +/- 0.0067 Aphelion: 44.59148934 +/- 0.0069 Period (y) 283.6499 +/- 0.03 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 27.12456873 +/- 0.0007 Ecliptic Y 31.67062899 +/- 0.0008 Ecliptic Z -2.47332221 +/- 0.0001 Ecliptic XDOT -0.00206547 +/- 0.0000 Ecliptic YDOT 0.00174535 +/- 0.0000 Ecliptic ZDOT -0.00003223 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 41.77186005 +/- 0.0007 Geocenter to KBO 41.37153868 +/- 0.0010 # Hcoef: 9.18
The following table shows the complete astrometric record for 15VT173. 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 (15VT173) followed by the observatory code and reference code for the source of the astrometry.
2015 09 06.63168 03 16 47.636 +14 37 11.29 25.5w 15VT173 568 C~2nwI 2015 09 12.52133 03 16 38.502 +14 36 06.72 25.4w 15VT173 568 C~2nwI 2015 10 07.45992 03 15 28.365 +14 29 48.32 25.5w 15VT173 568 C~2nwI 2015 10 08.46335 03 15 24.606 +14 29 30.27 25.7w 15VT173 568 C~2nwI 2015 10 08.52236 03 15 24.370 +14 29 29.10 25.7w 15VT173 568 C~2nwI 2015 11 07.36952 03 13 11.390 +14 19 42.25 24.5r 15VT173 568 C~2nwI 2015 11 07.41164 03 13 11.185 +14 19 41.38 25.0r 15VT173 568 C~2nwI 2015 11 07.45387 03 13 10.982 +14 19 40.60 24.8r 15VT173 568 C~2nwI 2015 11 10.54061 03 12 55.859 +14 18 38.09 25.5w 15VT173 568 C~2nwI 2015 12 06.39596 03 10 52.461 +14 10 46.36 25.7w 15VT173 568 C~2nwI 2016 01 01.38342 03 09 16.490 +14 05 39.36 25.8w 15VT173 568 C~2nwI 2016 01 02.34977 03 09 13.833 +14 05 32.30 25.8w 15VT173 568 C~2nwI 2016 01 07.33018 03 09 01.307 +14 05 02.69 25.1w 15VT173 568 C~2nwI 2016 09 25.60501 03 21 36.286 +14 53 22.20 25.5w 15VT173 568 C~2nwI 2016 10 10.53987 03 20 45.707 +14 49 14.46 27.1w 15VT173 568 C~2nwI 2016 10 10.58850 03 20 45.512 +14 49 13.67 26.0w 15VT173 568 C~2nwI 2016 11 02.50837 03 19 04.185 +14 41 54.28 15VT173 568 C~2nwI 2016 11 02.54312 03 19 04.020 +14 41 53.69 25.5w 15VT173 568 C~2nwI 2016 11 04.41826 03 18 54.953 +14 41 16.77 25.8w 15VT173 568 C~2nwI 2016 11 04.48449 03 18 54.615 +14 41 15.38 25.3w 15VT173 568 C~2nwI 2017 01 26.31474 03 13 59.416 +14 25 36.05 25.9w 15VT173 568 C~2nwI 2017 09 15.59463 03 27 31.797 +15 15 31.99 26.0w 15VT173 568 C~2nwI 2017 09 22.58081 03 27 16.415 +15 14 03.46 25.7w 15VT173 568 C~2nwI 2017 12 16.34460 03 21 11.340 +14 49 51.23 25.2w 15VT173 568 C~2nwI
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 0.06 0.00 0.00
2 0.0161 -144.82 -0.15 -27.81 -0.05
3 0.0844 -1226.64 0.07 -127.12 -0.05
4 0.0872 -1284.05 0.03 -130.25 0.03
5 0.0873 -1287.67 -0.11 -130.48 -0.04
6 0.1690 -3306.21 -0.09 -188.53 0.33
7 0.1691 -3309.31 -0.04 -188.59 0.29
8 0.1693 -3312.37 0.08 -188.56 0.33
9 0.1777 -3540.93 0.24 -190.75 -0.32
10 0.2485 -5396.73 0.08 -169.20 -0.02
11 0.3196 -6825.21 -0.10 -91.70 -0.06
12 0.3223 -6864.39 -0.05 -88.13 -0.25
13 0.3359 -7048.09 -0.05 -67.73 -0.07
14 1.0540 4296.36 -0.32 -141.40 0.01
15 1.0949 3523.79 0.04 -193.41 -0.01
16 1.0950 3520.85 0.03 -193.45 0.08
17 1.1578 1987.26 0.06 -240.26 -0.19
18 1.1579 1984.79 0.16 -240.22 -0.11
19 1.1630 1848.15 0.18 -241.94 -0.02
20 1.1632 1843.05 0.01 -242.01 -0.06
21 1.3900 -2539.62 -0.13 -31.31 -0.06
22 2.0259 9620.79 0.01 -152.08 0.10
23 2.0450 9382.65 -0.04 -182.46 -0.03
24 2.2771 3892.64 0.01 -253.00 0.13
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.
15VT173 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.597 43.610 43.585 ecceobj 0.041 0.042 0.041 incobj 3.461 3.461 3.461 qmin 40.383 40.474 40.444 qmax 46.255 46.322 46.244 amean 43.261 43.273 43.248 amin 42.925 42.943 42.912 amax 43.616 43.619 43.599 emean 0.045 0.045 0.045 emin 0.026 0.026 0.026 emax 0.061 0.062 0.061 imean 3.433 3.430 3.437 imin 2.480 2.480 2.479 imax 4.189 4.180 4.195 excite_mean 0.075 0.075 0.075 fracstop 1.000 1.000 1.000 cjmean 3.086 3.086 3.086 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 179.6 179.9 180.1 kozaiamp 179.9 180.0 180.0