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: 19QT109 # Created Mon Apr 28 01:11:16 2025 # Orbit generated from Bernstein formalism # Fitting 10 observations of 10 # Arc: 2.10y # First observation: 2019/08/28 # Last observation: 2021/10/04 Preliminary a, adot, b, bdot, g, gdot: 0.000022 0.025818 -0.000001 0.000874 0.025062 0.000000 # Chi-squared of fit: 1.03 DOF: 14 RMS: 0.06 # Min/Max residuals: -0.09 0.10 # Exact a, adot, b, bdot, g, gdot: 1.625754E-05 2.575267E-02 9.706266E-07 8.717859E-04 2.494709E-02 -6.945739E-04 # Covariance matrix: 6.6205E-13 5.8927E-13 -3.6651E-15 2.8491E-14 1.2781E-12 1.5592E-11 5.8927E-13 4.7055E-12 -2.2334E-14 1.7369E-13 4.7019E-12 9.5173E-11 -3.6651E-15 -2.2334E-14 3.5320E-13 -1.9297E-13 -2.2689E-14 -4.7048E-13 2.8491E-14 1.7369E-13 -1.9297E-13 1.8548E-13 1.7642E-13 3.6590E-12 1.2781E-12 4.7019E-12 -2.2689E-14 1.7642E-13 6.1337E-12 9.6616E-11 1.5592E-11 9.5173E-11 -4.7048E-13 3.6590E-12 9.6616E-11 2.0050E-09 # lat0 lon0 xBary yBary zBary JD0 -0.059678 -7.392372 0.309197 -0.000992 -0.955852 2458723.711696 # Heliocentric elements and errors Epoch: 2458720.5000 = 2019/08/25 Mean Anomaly: 345.98205 +/- 0.705 Argument of Peri: 16.00280 +/- 0.902 Long of Asc Node: 353.89122 +/- 0.001 Inclination: 1.93422 +/- 0.001 Eccentricity: 0.11553767 +/- 0.0007 Semi-Major Axis: 46.17915548 +/- 0.0174 Time of Perihelion: 2463183.7311 +/- 224.3 Perihelion: 40.84372360 +/- 0.0348 Aphelion: 51.51458736 +/- 0.0367 Period (y) 313.8175 +/- 0.18 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 40.66259393 +/- 0.0039 Ecliptic Y -5.59402202 +/- 0.0005 Ecliptic Z -0.04171055 +/- 0.0000 Ecliptic XDOT 0.00029660 +/- 0.0000 Ecliptic YDOT 0.00281313 +/- 0.0000 Ecliptic ZDOT 0.00009553 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 41.04560107 +/- 0.0039 Geocenter to KBO 40.08484320 +/- 0.0040 # Hcoef: 8.97
The following table shows the complete astrometric record for 19QT109. 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 (19QT109) followed by the observatory code and reference code for the source of the astrometry.
2019 08 28.210895 23 32 56.470 -02 59 18.50 24.9r 19QT109 W84 C~7XLg 2019 08 28.388381 23 32 55.696 -02 59 23.17 24.9r 19QT109 W84 C~7XLg 2019 09 29.013696 23 30 34.981 -03 14 11.84 25.0r 19QT109 W84 C~7XLg 2019 09 29.177510 23 30 34.242 -03 14 16.46 25.0r 19QT109 W84 C~7XLg 2020 10 21.004397 23 34 24.902 -02 46 03.66 25.2r 19QT109 W84 C~7XLg 2020 10 21.174149 23 34 24.288 -02 46 07.46 25.2r 19QT109 W84 C~7XLg 2021 09 06.108763 23 42 59.754 -01 47 43.84 25.0r 19QT109 W84 C~7XLg 2021 09 06.196686 23 42 59.355 -01 47 46.19 25.0r 19QT109 W84 C~7XLg 2021 10 04.002582 23 40 55.156 -02 00 55.70 24.9r 19QT109 W84 C~7XLg 2021 10 04.175328 23 40 54.403 -02 01 00.35 24.9r 19QT109 W84 C~7XLg
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 -0.09
2 0.0005 -12.50 -0.05 0.29 0.04
3 0.0871 -2299.84 0.10 15.78 0.06
4 0.0875 -2311.83 -0.08 15.90 0.03
5 1.1493 1531.10 0.03 206.65 -0.05
6 1.1498 1521.15 0.01 206.79 -0.06
7 2.0257 10010.61 0.05 364.42 -0.03
8 2.0260 10004.17 0.02 364.64 0.10
9 2.1021 7977.93 -0.09 378.14 -0.03
10 2.1026 7965.71 0.00 378.35 0.02
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.
19QT109 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 46.269 46.302 46.237 ecceobj 0.119 0.120 0.118 incobj 1.937 1.937 1.937 qmin 40.040 39.985 40.029 qmax 52.544 52.587 52.419 amean 46.102 46.134 46.071 amin 45.716 45.754 45.699 amax 46.534 46.559 46.497 emean 0.116 0.117 0.115 emin 0.102 0.103 0.101 emax 0.130 0.129 0.128 imean 2.710 2.709 2.711 imin 2.151 2.151 2.153 imax 3.216 3.215 3.219 excite_mean 0.125 0.126 0.125 fracstop 1.000 1.000 1.000 cjmean 3.108 3.108 3.108 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 176.6 176.8 176.8 kozaiamp 180.0 180.0 180.0