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: 19AP142 # Created Sat Feb 22 02:11:11 2025 # Orbit generated from Bernstein formalism # Fitting 16 observations of 16 # Arc: 1.05y # First observation: 2018/02/18 # Last observation: 2019/03/08 Preliminary a, adot, b, bdot, g, gdot: -0.000238 0.059759 0.000181 -0.016482 0.047369 0.000000 # Chi-squared of fit: 6.87 DOF: 26 RMS: 0.12 # Min/Max residuals: -0.26 0.22 # Exact a, adot, b, bdot, g, gdot: 1.914087E-05 6.061845E-02 -5.264282E-06 -1.669838E-02 5.022960E-02 1.182911E-02 # Covariance matrix: 7.3102E-13 -9.9513E-13 6.3729E-16 7.5324E-14 -2.9400E-13 -4.4514E-12 -9.9513E-13 2.4697E-11 6.6473E-13 -6.8197E-12 1.2925E-11 4.0585E-10 6.3729E-16 6.6473E-13 6.7666E-13 -9.0447E-13 3.4415E-13 1.1383E-11 7.5324E-14 -6.8197E-12 -9.0447E-13 2.8624E-12 -3.6941E-12 -1.1637E-10 -2.9400E-13 1.2925E-11 3.4415E-13 -3.6941E-12 7.3027E-12 2.1978E-10 -4.4514E-12 4.0585E-10 1.1383E-11 -1.1637E-10 2.1978E-10 6.9255E-09 # lat0 lon0 xBary yBary zBary JD0 -9.667813 142.645411 -0.108065 -0.165175 -0.970500 2458167.740348 # Heliocentric elements and errors Epoch: 2458160.5000 = 2018/02/11 Mean Anomaly: 117.12706 +/- 0.222 Argument of Peri: 73.60737 +/- 0.196 Long of Asc Node: 292.90723 +/- 0.002 Inclination: 17.94899 +/- 0.001 Eccentricity: 0.23272364 +/- 0.0007 Semi-Major Axis: 18.27327919 +/- 0.0057 Time of Perihelion: 2448877.7233 +/- 17.0 Perihelion: 14.02065517 +/- 0.0141 Aphelion: 22.52590322 +/- 0.0151 Period (y) 78.1147 +/- 0.04 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -16.45033062 +/- 0.0008 Ecliptic Y 12.41263518 +/- 0.0006 Ecliptic Z -3.34350257 +/- 0.0002 Ecliptic XDOT -0.00238231 +/- 0.0000 Ecliptic YDOT -0.00233818 +/- 0.0000 Ecliptic ZDOT -0.00100567 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 20.87740164 +/- 0.0008 Geocenter to KBO 19.90857966 +/- 0.0011 # Hcoef: 9.91
The following table shows the complete astrometric record for 19AP142. 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 (19AP142) followed by the observatory code and reference code for the source of the astrometry.
2018 02 18.239547 09 27 23.539 +04 48 34.42 22.9r 19AP142 W84 C~8eYm 2018 02 19.231934 09 27 14.290 +04 49 14.48 23.3g 19AP142 W84 C~8eYm 2018 11 15.56153 09 47 42.02 +02 51 37.2 23.2z 19AP142 T09 C~870S 2018 11 15.57003 09 47 42.05 +02 51 36.9 23.0z 19AP142 T09 C~870S 2018 11 15.61124 09 47 42.12 +02 51 34.8 23.0z 19AP142 T09 C~870S 2018 11 15.62300 09 47 42.14 +02 51 34.2 22.8z 19AP142 T09 C~870S 2019 01 06.56778 09 45 23.29 +02 31 00.7 23.6g 19AP142 T09 C~870S 2019 01 06.59117 09 45 23.12 +02 31 00.7 23.7g 19AP142 T09 C~870S 2019 01 06.60179 09 45 23.06 +02 31 00.7 23.7g 19AP142 T09 C~870S 2019 01 06.62123 09 45 22.91 +02 31 00.7 23.8g 19AP142 T09 C~870S 2019 01 06.62334 09 45 22.90 +02 31 00.7 23.7g 19AP142 T09 C~870S 2019 03 08.26245 09 36 35.50 +03 01 55.7 23.3r 19AP142 T09 C~870S 2019 03 08.29600 09 36 35.20 +03 01 57.2 23.3r 19AP142 T09 C~870S 2019 03 08.29809 09 36 35.20 +03 01 57.3 23.3r 19AP142 T09 C~870S 2019 03 08.31706 09 36 35.05 +03 01 58.0 23.0r 19AP142 T09 C~870S 2019 03 08.33820 09 36 34.86 +03 01 59.0 23.2r 19AP142 T09 C~870S
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 -0.01 0.00 0.00
2 0.0027 -143.81 0.02 -5.87 0.13
3 0.7401 19580.93 -0.12 -807.94 -0.15
4 0.7401 19581.46 0.04 -808.08 0.04
5 0.7402 19583.14 -0.05 -809.74 -0.01
6 0.7403 19583.63 -0.07 -810.21 -0.03
7 0.8825 17999.71 0.00 -2655.90 0.03
8 0.8826 17997.28 -0.04 -2656.73 -0.10
9 0.8826 17996.42 0.19 -2657.02 -0.08
10 0.8826 17994.28 0.03 -2657.74 -0.23
11 0.8826 17994.13 0.10 -2657.79 -0.22
12 1.0487 9876.75 -0.02 -3435.54 0.22
13 1.0488 9872.01 -0.26 -3435.56 0.09
14 1.0488 9871.97 -0.01 -3435.46 0.18
15 1.0488 9869.62 0.18 -3435.52 0.07
16 1.0489 9866.59 0.00 -3435.48 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.
19AP142 quality flag:3 Type: CENTAURR CENTAURR CENTAURR axisobj 18.409 18.541 18.280 ecceobj 0.240 0.240 0.239 incobj 17.914 17.918 17.910 qmin 13.348 13.911 13.340 qmax 23.443 23.103 23.775 amean 18.223 18.442 18.408 amin 18.069 18.253 18.102 amax 18.527 18.574 18.620 emean 0.254 0.239 0.260 emin 0.237 0.232 0.234 emax 0.270 0.245 0.277 imean 19.079 19.446 19.056 imin 18.691 19.298 18.548 imax 19.787 19.557 19.797 excite_mean 0.414 0.410 0.417 fracstop 0.011 0.002 0.011 cjmean 3.078 3.066 3.066 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 155.4 89.8 152.7 kozaiamp 84.1 14.4 79.2