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: 15DQ249 # Created Wed Nov 27 02:10:13 2024 # Orbit generated from Bernstein formalism # Fitting 23 observations of 23 # Arc: 7.03d # First observation: 2015/02/17 # Last observation: 2015/02/24 Preliminary a, adot, b, bdot, g, gdot: 0.000001 0.081279 0.000001 0.061956 0.059122 0.000000 # WARNING MRQMIN stopped after 13 iterations -- oscilliatory solution # WARNING Fitting with energy constraint # WARNING MRQMIN stopped after 13 iterations -- oscilliatory solution # WARNING MRQMIN stopped after 13 iterations -- oscilliatory solution # Chi-squared of fit: 19.52 DOF: 41 RMS: 0.16 # Min/Max residuals: -0.26 0.28 # Exact a, adot, b, bdot, g, gdot: 2.038940E-05 7.557301E-02 1.793747E-05 6.165538E-02 5.815178E-02 -2.124897E-02 # Covariance matrix: 8.9568E-12 3.2069E-08 1.4021E-12 1.2975E-09 5.1489E-09 5.6534E-08 3.2069E-08 1.1796E-04 5.2012E-09 4.7395E-06 1.8908E-05 1.7805E-04 1.4021E-12 5.2012E-09 3.6697E-13 1.9671E-10 8.3284E-10 6.8069E-09 1.2975E-09 4.7395E-06 1.9671E-10 1.9292E-07 7.6030E-07 7.8758E-06 5.1489E-09 1.8908E-05 8.3284E-10 7.6030E-07 3.0312E-06 2.9109E-05 5.6534E-08 1.7805E-04 6.8069E-09 7.8758E-06 2.9109E-05 9.5225E-04 # lat0 lon0 xBary yBary zBary JD0 -15.235430 159.000837 0.190056 -0.253855 -0.932785 2457070.660168 # Heliocentric elements and errors Epoch: 2457070.5000 = 2015/02/17 Mean Anomaly: 342.31307 +/- 17.052 Argument of Peri: 21.34191 +/- 49.675 Long of Asc Node: 175.36016 +/- 2.250 Inclination: 41.38604 +/- 3.730 Eccentricity: 0.40756505 +/- 0.2486 Semi-Major Axis: 28.17835425 +/- 6.6554 Time of Perihelion: 2459754.7435 +/- 2406.7 Perihelion: 16.69384190 +/- 8.0388 Aphelion: 39.66286659 +/- 11.6975 Period (y) 149.5828 +/- 52.99 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -16.32767302 +/- 0.4637 Ecliptic Y 6.46997512 +/- 0.1781 Ecliptic Z -4.51871514 +/- 0.1353 Ecliptic XDOT -0.00108970 +/- 0.0014 Ecliptic YDOT -0.00339987 +/- 0.0004 Ecliptic ZDOT 0.00306377 +/- 0.0004 # Distances at JD0 (AU) Heliocenter to KBO 18.13483584 +/- 0.4237 Geocenter to KBO 17.19637854 +/- 0.5149 # Hcoef: 10.98
The following table shows the complete astrometric record for 15DQ249. 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 (15DQ249) followed by the observatory code and reference code for the source of the astrometry.
2015 02 17.15939 10 19 38.44 -05 56 40.4 24.0g 15DQ249 W84 C~2iOW 2015 02 17.24529 10 19 37.61 -05 56 33.0 23.7g 15DQ249 W84 C~2iOW 2015 02 17.31416 10 19 36.96 -05 56 27.4 23.9g 15DQ249 W84 C~2iOW 2015 02 17.36113 10 19 36.50 -05 56 23.7 23.8g 15DQ249 W84 C~2iOW 2015 02 18.08845 10 19 29.67 -05 55 23.1 24.3g 15DQ249 W84 C~2iOW 2015 02 18.15593 10 19 29.00 -05 55 17.7 24.0g 15DQ249 W84 C~2iOW 2015 02 18.15643 10 19 28.99 -05 55 17.2 24.0g 15DQ249 W84 C~2y2b 2015 02 18.22410 10 19 28.33 -05 55 11.8 23.8g 15DQ249 W84 C~2iOW 2015 02 18.22459 10 19 28.33 -05 55 11.5 15DQ249 W84 C~2y2b 2015 02 18.29439 10 19 27.66 -05 55 06.1 23.8g 15DQ249 W84 C~2iOW 2015 02 18.29489 10 19 27.65 -05 55 05.6 15DQ249 W84 C~2y2b 2015 02 18.36322 10 19 26.99 -05 55 00.4 24.2g 15DQ249 W84 C~2iOW 2015 02 19.08521 10 19 20.16 -05 53 59.5 24.0g 15DQ249 W84 C~2iOW 2015 02 19.22231 10 19 18.85 -05 53 47.8 15DQ249 W84 C~2iOW 2015 02 19.29123 10 19 18.20 -05 53 41.8 15DQ249 W84 C~2iOW 2015 02 19.36031 10 19 17.53 -05 53 36.1 15DQ249 W84 C~2iOW 2015 02 22.07772 10 18 51.70 -05 49 41.5 15DQ249 W84 C~2iOW 2015 02 22.14502 10 18 51.05 -05 49 35.2 15DQ249 W84 C~2iOW 2015 02 22.21347 10 18 50.36 -05 49 29.2 15DQ249 W84 C~2iOW 2015 02 22.28233 10 18 49.71 -05 49 23.2 15DQ249 W84 C~2iOW 2015 02 22.35085 10 18 49.04 -05 49 17.5 15DQ249 W84 C~2iOW 2015 02 24.12978 10 18 32.11 -05 46 38.9 15DQ249 W84 C~2iOW 2015 02 24.19143 10 18 31.53 -05 46 33.2 15DQ249 W84 C~2iOW
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 -0.24
2 0.0002 -14.25 -0.10 2.24 0.06
3 0.0004 -25.34 0.13 3.82 0.05
4 0.0006 -33.09 0.08 4.69 -0.17
5 0.0025 -150.24 0.28 22.85 0.16
6 0.0027 -161.53 0.10 24.13 -0.16
7 0.0027 -161.86 -0.15 24.54 0.24
8 0.0029 -173.01 -0.13 25.87 -0.02
9 0.0029 -173.12 -0.16 26.15 0.24
10 0.0031 -184.41 0.08 27.42 -0.14
11 0.0031 -184.74 -0.17 27.83 0.26
12 0.0033 -195.81 0.01 28.98 -0.25
13 0.0053 -313.09 -0.26 47.41 -0.21
14 0.0056 -335.59 -0.08 50.96 -0.02
15 0.0058 -346.83 0.11 52.91 0.22
16 0.0060 -358.23 0.13 54.46 0.04
17 0.0135 -803.40 0.25 128.08 -0.12
18 0.0136 -814.75 0.13 130.30 0.25
19 0.0138 -826.54 -0.21 132.02 0.10
20 0.0140 -837.78 0.07 133.96 0.14
21 0.0142 -849.19 0.10 135.51 -0.23
22 0.0191 -1142.81 -0.19 188.18 -0.19
23 0.0193 -1152.97 0.00 190.23 0.06
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.
15DQ249 quality flag:0 Type: ERR2LARGE ERR2LARGE ERR2LARGE axisobj 0.000 0.000 0.000 ecceobj -1.000 -1.000 -1.000 incobj -1.000 -1.000 -1.000 qmin 0.000 0.000 0.000 qmax 0.000 0.000 0.000 amean 0.000 0.000 0.000 amin 0.000 0.000 0.000 amax 0.000 0.000 0.000 emean 0.000 0.000 0.000 emin 0.000 0.000 0.000 emax 0.000 0.000 0.000 imean 0.000 0.000 0.000 imin 0.000 0.000 0.000 imax 0.000 0.000 0.000 excite_mean 0.000 0.000 0.000 fracstop 0.000 0.000 0.000 cjmean 0.000 0.000 0.000 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 0.0 0.0 0.0 kozaiamp 0.0 0.0 0.0