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: 09JD19 # Created Wed May 21 01:09:08 2025 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 23 observations of 23 # Arc: 17.14y # First observation: 2008/03/02 # Last observation: 2025/04/23 # Chi-squared of fit: 3.51 DOF: 40 RMS: 0.07 # Min/Max residuals: -0.18 0.15 # Exact a, adot, b, bdot, g, gdot: 1.617005E-05 2.955618E-02 5.367968E-06 8.192608E-03 2.816003E-02 -3.326171E-03 # Covariance matrix: 4.0113E-13 -5.3199E-14 4.2440E-14 -1.2718E-14 2.2058E-13 -7.1786E-14 -5.3199E-14 2.1051E-14 -1.0445E-14 5.6651E-15 -1.2497E-14 3.4432E-14 4.2440E-14 -1.0445E-14 1.1547E-13 -1.1642E-14 2.5359E-14 -1.7753E-14 -1.2718E-14 5.6651E-15 -1.1642E-14 3.1627E-15 -3.4162E-15 9.9941E-15 2.2058E-13 -1.2497E-14 2.5359E-14 -3.4162E-15 2.0077E-13 -1.5227E-14 -7.1786E-14 3.4432E-14 -1.7753E-14 9.9941E-15 -1.5227E-14 6.0939E-14 # lat0 lon0 xBary yBary zBary JD0 14.544569 -174.795118 0.391580 0.229226 -0.883341 2454528.075486 # Heliocentric elements and errors Epoch: 2454528.5000 = 2008/03/03 Mean Anomaly: 318.64699 +/- 0.011 Argument of Peri: 98.78204 +/- 0.015 Long of Asc Node: 143.40691 +/- 0.000 Inclination: 21.00191 +/- 0.000 Eccentricity: 0.16204147 +/- 0.0000 Semi-Major Axis: 40.79660757 +/- 0.0031 Time of Perihelion: 2465461.4954 +/- 10.2 Perihelion: 34.18586537 +/- 0.0030 Aphelion: 47.40734977 +/- 0.0039 Period (y) 260.5819 +/- 0.03 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -35.17556009 +/- 0.0005 Ecliptic Y -2.81662071 +/- 0.0000 Ecliptic Z 8.91827044 +/- 0.0001 Ecliptic XDOT 0.00077810 +/- 0.0000 Ecliptic YDOT -0.00281523 +/- 0.0000 Ecliptic ZDOT 0.00068967 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 36.39772464 +/- 0.0005 Geocenter to KBO 35.51142296 +/- 0.0006 # Hcoef: 7.62
The following table shows the complete astrometric record for 09JD19. 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 (09JD19) followed by the observatory code and reference code for the source of the astrometry.
2008 03 02.574732 12 42 24.81 +11 16 22.2 23.0r 09JD19 T14 C~7udm 2008 03 02.583653 12 42 24.76 +11 16 22.8 23.0r 09JD19 T14 C~7udm 2009 05 15.469579 12 43 48.652 +11 37 30.56 23.1i 09JD19 568 C~0aRU 2009 05 20.259695 12 43 33.098 +11 37 52.39 23.1i 09JD19 568 C~0aRU 2009 05 20.297904 12 43 32.979 +11 37 52.50 23.0i 09JD19 568 C~0aRU 2009 05 20.331223 12 43 32.876 +11 37 52.55 22.7i 09JD19 568 C~0aRU 2009 05 20.364003 12 43 32.770 +11 37 52.72 22.8i 09JD19 568 C~0aRU 2009 05 25.324834 12 43 18.612 +11 37 55.86 24.0g 09JD19 568 C~0aRU 2009 05 25.372759 12 43 18.478 +11 37 55.76 24.1g 09JD19 568 C~0aRU 2009 05 26.266896 12 43 16.163 +11 37 54.25 24.1g 09JD19 568 C~0aRU 2009 05 26.314666 12 43 16.036 +11 37 54.15 24.0g 09JD19 568 C~0aRU 2009 05 26.362558 12 43 15.908 +11 37 54.05 23.9g 09JD19 568 C~0aRU 2009 05 26.442171 12 43 15.695 +11 37 53.77 09JD19 568 C~0aRU 2009 06 16.365819 12 42 42.300 +11 34 21.96 09JD19 568 C~0aRU 2009 06 28.335955 12 42 42.350 +11 29 59.70 09JD19 568 C~0aRU 2016 02 12.529503 13 40 59.09 +08 37 31.4 23.1r 09JD19 T14 C~7udm 2016 02 12.577879 13 40 59.01 +08 37 33.4 23.0r 09JD19 T14 C~7udm 2016 06 08.316530 13 32 56.61 +09 33 25.9 22.8r 09JD19 T14 C~7udm 2016 06 08.366607 13 32 56.48 +09 33 25.5 09JD19 T14 C~7udm 2019 03 06.281482 14 02 14.69 +07 48 16.5 22.9r 09JD19 W84 C~7udm 2025 04 23.386040 14 43 48.723 +05 56 10.05 22.8G 09JD19 G37 C~8ssG 2025 04 23.421620 14 43 48.529 +05 56 11.16 09JD19 G37 C~8ssG 2025 04 23.464950 14 43 48.308 +05 56 12.35 09JD19 G37 C~8ssG
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 0.02 0.00 -0.18
2 0.0000 0.00 -0.15 0.00 0.03
3 1.2016 0.00 0.10 0.00 0.07
4 1.2147 0.00 -0.01 0.00 0.03
5 1.2148 0.00 0.02 0.00 0.04
6 1.2149 0.00 0.05 0.00 -0.00
7 1.2150 0.00 0.01 0.00 0.09
8 1.2286 0.00 0.00 0.00 -0.01
9 1.2287 0.00 -0.04 0.00 -0.04
10 1.2312 0.00 0.03 0.00 -0.04
11 1.2313 0.00 0.03 0.00 -0.04
12 1.2315 0.00 0.02 0.00 -0.04
13 1.2317 0.00 -0.04 0.00 -0.13
14 1.2890 0.00 -0.05 0.00 0.08
15 1.3217 0.00 0.08 0.00 0.15
16 7.9479 0.00 -0.01 0.00 -0.00
17 7.9480 0.00 -0.01 0.00 -0.04
18 8.2676 0.00 -0.10 0.00 -0.01
19 8.2677 0.00 0.01 0.00 0.01
20 11.0081 0.00 0.05 0.00 0.02
21 17.1412 0.00 -0.04 0.00 0.08
22 17.1413 0.00 -0.07 0.00 0.05
23 17.1414 0.00 0.12 0.00 -0.14
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.
09JD19 quality flag:2 Type: SCATNEAR SCATEXTD SCATNEAR axisobj 40.483 40.483 40.484 ecceobj 0.155 0.155 0.155 incobj 21.006 21.006 21.006 qmin 33.701 33.735 33.211 qmax 48.167 48.037 48.685 amean 40.701 40.697 40.693 amin 40.301 40.309 40.296 amax 41.116 41.107 41.139 emean 0.147 0.145 0.152 emin 0.129 0.127 0.128 emax 0.172 0.170 0.184 imean 20.318 20.406 20.236 imin 19.307 19.317 19.042 imax 21.172 21.330 21.213 excite_mean 0.377 0.378 0.378 fracstop 1.000 1.000 1.000 cjmean 2.897 2.896 2.896 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 181.8 182.1 183.0 kozaiamp 180.0 180.0 179.9