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: 16UL273 # Created Fri Apr 26 01:18:07 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 12 observations of 12 # Arc: 8.94y # First observation: 2013/12/20 # Last observation: 2022/11/28 # Chi-squared of fit: 2.74 DOF: 18 RMS: 0.08 # Min/Max residuals: -0.18 0.16 # Exact a, adot, b, bdot, g, gdot: 1.648204E-05 2.761970E-02 6.340526E-06 1.114698E-02 2.738548E-02 -1.870899E-03 # Covariance matrix: 1.0982E-12 -3.8665E-13 1.8171E-13 -1.2445E-13 -4.0671E-13 -1.0492E-12 -3.8665E-13 2.5288E-13 -1.6269E-13 9.5361E-14 -4.8266E-14 7.9220E-13 1.8171E-13 -1.6269E-13 4.5272E-13 -1.1857E-13 1.0321E-13 -5.4421E-13 -1.2445E-13 9.5361E-14 -1.1857E-13 5.0728E-14 -3.1992E-14 3.1588E-13 -4.0671E-13 -4.8266E-14 1.0321E-13 -3.1992E-14 7.6225E-13 -2.4142E-13 -1.0492E-12 7.9220E-13 -5.4421E-13 3.1588E-13 -2.4142E-13 2.6214E-12 # lat0 lon0 xBary yBary zBary JD0 -11.503478 26.016982 -0.867601 -0.091400 -0.449868 2456646.628978 # Heliocentric elements and errors Epoch: 2456646.5000 = 2013/12/20 Mean Anomaly: 342.05742 +/- 0.031 Argument of Peri: 354.89323 +/- 0.040 Long of Asc Node: 53.14815 +/- 0.000 Inclination: 24.81043 +/- 0.000 Eccentricity: 0.12026538 +/- 0.0001 Semi-Major Axis: 41.67583416 +/- 0.0066 Time of Perihelion: 2461544.3705 +/- 23.8 Perihelion: 36.66367426 +/- 0.0072 Aphelion: 46.68799406 +/- 0.0085 Period (y) 269.0510 +/- 0.06 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 32.18701739 +/- 0.0010 Ecliptic Y 16.67932310 +/- 0.0005 Ecliptic Z -7.28206596 +/- 0.0002 Ecliptic XDOT -0.00118228 +/- 0.0000 Ecliptic YDOT 0.00249635 +/- 0.0000 Ecliptic ZDOT 0.00112947 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 36.97613207 +/- 0.0009 Geocenter to KBO 36.51578613 +/- 0.0012 # Hcoef: 8.05
The following table shows the complete astrometric record for 16UL273. 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 (16UL273) followed by the observatory code and reference code for the source of the astrometry.
2013 12 20.12820 01 53 06.247 -00 41 14.40 23.3i 16UL273 W84 C~52ag 2014 10 01.34562 02 04 18.509 +00 45 31.67 23.6r 16UL273 W84 C~52ag 2016 10 29.20198 02 12 02.352 +02 55 59.47 23.5i 16UL273 W84 C~52ag 2016 10 29.20336 02 12 02.351 +02 55 59.40 23.4r 16UL273 W84 C~52ag 2016 11 03.22984 02 11 35.125 +02 54 20.59 24.4r 16UL273 W84 C~52ag 2016 11 27.12462 02 09 34.290 +02 48 57.11 23.7r 16UL273 W84 C~52ag 2016 11 27.12599 02 09 34.287 +02 48 57.25 23.6i 16UL273 W84 C~52ag 2016 11 28.12309 02 09 29.793 +02 48 50.05 23.7g 16UL273 W84 C~52ag 2017 09 18.31069 02 20 30.425 +04 22 57.48 23.5r 16UL273 W84 C~52ag 2022 11 28.259720 02 40 34.616 +09 53 25.52 23.6G 16UL273 G37 C~67D6 2022 11 28.309620 02 40 34.361 +09 53 24.86 16UL273 G37 C~67D6 2022 11 28.359320 02 40 34.110 +09 53 24.40 16UL273 G37 C~67D6
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 -0.11 0.00 -0.02
2 0.7809 0.00 0.16 0.00 0.04
3 2.8585 0.00 -0.01 0.00 -0.00
4 2.8585 0.00 0.09 0.00 -0.05
5 2.8723 0.00 -0.11 0.00 0.05
6 2.9377 0.00 -0.02 0.00 -0.13
7 2.9377 0.00 0.03 0.00 0.02
8 2.9404 0.00 0.16 0.00 0.03
9 3.7459 0.00 -0.18 0.00 0.07
10 8.9394 0.00 -0.03 0.00 -0.02
11 8.9396 0.00 -0.01 0.00 -0.07
12 8.9397 0.00 0.04 0.00 0.08
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.
16UL273 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 41.925 41.925 41.925 ecceobj 0.124 0.124 0.124 incobj 24.787 24.787 24.787 qmin 35.481 35.513 35.425 qmax 48.123 48.161 48.150 amean 41.656 41.658 41.615 amin 41.305 41.326 41.243 amax 42.033 42.036 42.032 emean 0.127 0.127 0.127 emin 0.109 0.109 0.107 emax 0.146 0.146 0.146 imean 23.485 23.489 23.466 imin 22.923 22.920 22.920 imax 24.098 24.105 24.089 excite_mean 0.418 0.418 0.418 fracstop 1.000 1.000 1.000 cjmean 2.864 2.864 2.864 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 170.3 170.6 169.8 kozaiamp 179.9 180.0 180.0