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: 19JA145 # Created Sun Apr 27 01:11:15 2025 # Orbit generated from Bernstein formalism # Fitting 21 observations of 21 # Arc: 2.18y # First observation: 2017/03/25 # Last observation: 2019/05/31 Preliminary a, adot, b, bdot, g, gdot: 0.000010 0.020895 -0.000003 -0.004494 0.025102 0.000000 # Chi-squared of fit: 14.81 DOF: 36 RMS: 0.15 # Min/Max residuals: -0.35 0.39 # Exact a, adot, b, bdot, g, gdot: 1.371276E-05 2.067583E-02 -2.393919E-06 -4.477271E-03 2.362115E-02 -3.247981E-03 # Covariance matrix: 5.0665E-13 3.5666E-12 1.7110E-15 -8.5029E-13 3.4197E-12 9.2446E-11 3.5666E-12 8.1970E-10 4.3587E-13 -1.8308E-10 7.4930E-10 1.9875E-08 1.7110E-15 4.3587E-13 4.8772E-13 -3.3059E-13 4.0905E-13 1.0513E-11 -8.5029E-13 -1.8308E-10 -3.3059E-13 4.1029E-11 -1.6733E-10 -4.4400E-09 3.4197E-12 7.4930E-10 4.0905E-13 -1.6733E-10 6.8691E-10 1.8161E-08 9.2446E-11 1.9875E-08 1.0513E-11 -4.4400E-09 1.8161E-08 4.8202E-07 # lat0 lon0 xBary yBary zBary JD0 -4.908825 158.285505 -0.433332 -0.076363 -0.891133 2457837.585901 # Heliocentric elements and errors Epoch: 2457830.5000 = 2017/03/18 Mean Anomaly: 244.18659 +/- 7.572 Argument of Peri: 333.72016 +/- 6.697 Long of Asc Node: 317.55966 +/- 0.014 Inclination: 13.02950 +/- 0.007 Eccentricity: 0.17317212 +/- 0.0211 Semi-Major Axis: 39.41208662 +/- 0.3849 Time of Perihelion: 2486904.1075 +/- 1852.5 Perihelion: 32.58701193 +/- 0.8895 Aphelion: 46.23716130 +/- 0.9454 Period (y) 247.4300 +/- 3.62 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -40.18114552 +/- 0.0435 Ecliptic Y 15.52900225 +/- 0.0173 Ecliptic Z -3.62273837 +/- 0.0040 Ecliptic XDOT -0.00049345 +/- 0.0001 Ecliptic YDOT -0.00238820 +/- 0.0000 Ecliptic ZDOT -0.00048490 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 43.22960328 +/- 0.0409 Geocenter to KBO 42.33493978 +/- 0.0470 # Hcoef: 8.11
The following table shows the complete astrometric record for 19JA145. 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 (19JA145) followed by the observatory code and reference code for the source of the astrometry.
2017 03 25.08510 10 32 22.17 +03 54 21.9 24.6V 19JA145 W84 C~83GK 2017 03 25.17804 10 32 21.79 +03 54 24.3 19JA145 W84 C~83GK 2017 03 26.08868 10 32 18.20 +03 54 46.5 19JA145 W84 C~83GK 2019 04 07.30645 10 39 40.45 +02 37 32.5 24.8g 19JA145 T09 C~83GK 2019 04 07.32324 10 39 40.39 +02 37 33.1 25.2g 19JA145 T09 C~83GK 2019 04 07.33864 10 39 40.33 +02 37 33.1 25.1g 19JA145 T09 C~83GK 2019 04 07.36014 10 39 40.26 +02 37 34.0 25.2g 19JA145 T09 C~83GK 2019 04 07.39191 10 39 40.16 +02 37 34.6 25.1g 19JA145 T09 C~83GK 2019 04 08.24482 10 39 37.26 +02 37 54.5 23.7y 19JA145 T09 C~83GK 2019 04 08.27248 10 39 37.13 +02 37 54.8 23.6y 19JA145 T09 C~83GK 2019 04 08.30540 10 39 37.02 +02 37 55.3 24.0y 19JA145 T09 C~83GK 2019 04 08.33583 10 39 36.93 +02 37 56.2 24.0y 19JA145 T09 C~83GK 2019 04 08.37648 10 39 36.79 +02 37 56.8 23.9y 19JA145 T09 C~83GK 2019 05 08.33595 10 38 25.94 +02 47 01.3 24.1i 19JA145 T09 C~83GK 2019 05 08.36272 10 38 25.89 +02 47 01.6 24.1i 19JA145 T09 C~83GK 2019 05 08.36539 10 38 25.90 +02 47 01.6 24.1i 19JA145 T09 C~83GK 2019 05 08.39491 10 38 25.85 +02 47 01.9 24.2i 19JA145 T09 C~83GK 2019 05 31.27995 10 38 20.16 +02 49 38.7 24.8r 19JA145 T09 C~83GK 2019 05 31.28833 10 38 20.19 +02 49 38.9 25.0r 19JA145 T09 C~83GK 2019 05 31.34382 10 38 20.20 +02 49 38.9 25.0r 19JA145 T09 C~83GK 2019 05 31.34592 10 38 20.21 +02 49 38.9 24.5r 19JA145 T09 C~83GK
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 -0.12
2 0.0003 -6.17 -0.07 0.12 -0.01
3 0.0027 -64.30 0.04 0.84 0.15
4 2.0348 7809.61 -0.03 -1843.75 -0.03
5 2.0349 7808.55 -0.12 -1843.53 0.16
6 2.0349 7807.72 -0.06 -1843.86 -0.20
7 2.0350 7806.41 -0.13 -1843.42 0.21
8 2.0351 7804.79 0.09 -1843.42 0.15
9 2.0374 7756.98 0.14 -1841.11 0.39
10 2.0375 7755.06 -0.21 -1841.55 -0.11
11 2.0376 7753.34 -0.05 -1841.70 -0.32
12 2.0376 7751.75 0.10 -1841.37 -0.05
13 2.0378 7749.58 0.24 -1841.59 -0.35
14 2.1198 6560.16 0.08 -1730.77 0.10
15 2.1199 6559.35 -0.12 -1730.77 -0.01
16 2.1199 6559.49 0.08 -1730.72 0.03
17 2.1199 6558.68 -0.07 -1730.72 -0.09
18 2.1826 6421.09 -0.04 -1616.78 -0.11
19 2.1826 6421.43 0.23 -1616.42 0.20
20 2.1828 6421.57 -0.13 -1616.37 -0.01
21 2.1828 6421.71 -0.01 -1616.31 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.
19JA145 quality flag:2 Type: SCATNEAR CENTAURR SCATNEAR axisobj 39.180 40.341 38.518 ecceobj 0.174 0.235 0.129 incobj 13.050 13.027 13.072 qmin 31.132 29.292 32.722 qmax 48.517 50.764 45.114 amean 39.486 37.858 38.704 amin 38.908 34.399 38.314 amax 40.083 40.848 39.260 emean 0.145 0.184 0.135 emin 0.040 0.101 0.109 emax 0.212 0.250 0.153 imean 14.887 15.229 16.449 imin 13.180 12.593 12.707 imax 17.187 18.079 18.479 excite_mean 0.300 0.322 0.314 fracstop 1.000 0.617 1.000 cjmean 2.947 2.923 2.927 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 177.2 171.4 177.0 kozaiamp 179.8 179.9 180.0