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: 15DT248 # Created Wed Apr 24 01:16:58 2024 # Orbit generated from Bernstein formalism # Fitting 20 observations of 20 # Arc: 10.10d # First observation: 2015/02/17 # Last observation: 2015/02/27 Preliminary a, adot, b, bdot, g, gdot: -0.000002 0.110557 0.000000 0.026398 0.065576 0.000000 # Chi-squared of fit: 16.83 DOF: 34 RMS: 0.16 # Min/Max residuals: -0.35 0.38 # Exact a, adot, b, bdot, g, gdot: 2.552791E-05 1.032953E-01 6.099061E-06 2.674040E-02 6.452193E-02 2.974040E-02 # Covariance matrix: 1.1600E-12 3.5550E-09 2.7216E-13 -1.3515E-10 5.6642E-10 9.9794E-11 3.5550E-09 1.3952E-05 1.1130E-09 -5.4288E-07 2.1962E-06 -1.6140E-05 2.7216E-13 1.1130E-09 2.3112E-13 -5.1485E-11 1.7459E-10 -1.7542E-09 -1.3515E-10 -5.4288E-07 -5.1485E-11 2.2136E-08 -8.5285E-08 7.6295E-07 5.6642E-10 2.1962E-06 1.7459E-10 -8.5285E-08 3.4602E-07 -2.3260E-06 9.9794E-11 -1.6140E-05 -1.7542E-09 7.6295E-07 -2.3260E-06 1.8192E-04 # lat0 lon0 xBary yBary zBary JD0 -18.226059 145.266934 -0.043044 -0.307655 -0.934923 2457070.555374 # Heliocentric elements and errors Epoch: 2457070.5000 = 2015/02/17 Mean Anomaly: 33.93071 +/- 6.198 Argument of Peri: 241.47956 +/- 12.674 Long of Asc Node: 194.67292 +/- 1.111 Inclination: 22.16543 +/- 0.345 Eccentricity: 0.35327389 +/- 0.1259 Semi-Major Axis: 21.36368458 +/- 2.1037 Time of Perihelion: 2453671.0934 +/- 365.4 Perihelion: 13.81645262 +/- 3.0145 Aphelion: 28.91091655 +/- 3.9168 Period (y) 98.7467 +/- 14.59 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -12.93463660 +/- 0.1103 Ecliptic Y 8.91306411 +/- 0.0765 Ecliptic Z -4.84741353 +/- 0.0442 Ecliptic XDOT -0.00377768 +/- 0.0004 Ecliptic YDOT -0.00272254 +/- 0.0004 Ecliptic ZDOT 0.00068314 +/- 0.0002 # Distances at JD0 (AU) Heliocenter to KBO 16.43912874 +/- 0.0971 Geocenter to KBO 15.49860612 +/- 0.1413 # Hcoef: 11.60
The following table shows the complete astrometric record for 15DT248. 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 (15DT248) followed by the observatory code and reference code for the source of the astrometry.
2015 02 17.054596 09 25 59.79 -04 06 40.5 23.6r 15DT248 W84 C~5PvV 2015 02 17.12194 09 25 59.08 -04 06 35.8 23.9g 15DT248 W84 C~2iOV 2015 02 17.20722 09 25 58.14 -04 06 29.5 23.8g 15DT248 W84 C~2iOV 2015 02 17.27585 09 25 57.41 -04 06 24.5 24.4g 15DT248 W84 C~2iOV 2015 02 18.05075 09 25 49.29 -04 05 26.9 24.0g 15DT248 W84 C~2iOV 2015 02 18.11851 09 25 48.57 -04 05 21.9 24.3g 15DT248 W84 C~2iOV 2015 02 18.18617 09 25 47.84 -04 05 16.9 24.5g 15DT248 W84 C~2iOV 2015 02 18.25467 09 25 47.11 -04 05 11.5 15DT248 W84 C~2iOV 2015 02 18.32507 09 25 46.37 -04 05 06.5 15DT248 W84 C~2iOV 2015 02 19.04743 09 25 38.85 -04 04 12.5 24.1g 15DT248 W84 C~2iOV 2015 02 19.18419 09 25 37.38 -04 04 01.9 24.1g 15DT248 W84 C~2iOV 2015 02 19.25293 09 25 36.67 -04 03 56.9 24.1g 15DT248 W84 C~2iOV 2015 02 19.32206 09 25 35.94 -04 03 51.9 24.3g 15DT248 W84 C~2iOV 2015 02 22.04005 09 25 07.77 -04 00 21.5 15DT248 W84 C~2iOV 2015 02 22.10764 09 25 07.08 -04 00 16.5 15DT248 W84 C~2iOV 2015 02 22.17516 09 25 06.37 -04 00 11.5 15DT248 W84 C~2iOV 2015 02 22.24395 09 25 05.66 -04 00 05.5 15DT248 W84 C~2iOV 2015 02 27.03560 09 24 17.37 -03 53 38.0 15DT248 W84 C~2iOV 2015 02 27.08376 09 24 16.90 -03 53 34.0 15DT248 W84 C~2iOV 2015 02 27.15145 09 24 16.19 -03 53 28.4 15DT248 W84 C~2iOV
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 -0.04 0.00 0.09
2 0.0002 -11.58 0.21 0.96 -0.06
3 0.0004 -26.93 -0.13 2.30 -0.14
4 0.0006 -38.89 -0.01 3.45 -0.15
5 0.0027 -172.54 -0.13 18.04 0.09
6 0.0029 -184.36 -0.07 19.24 0.08
7 0.0031 -196.32 -0.13 20.38 0.01
8 0.0033 -208.40 -0.18 21.90 0.30
9 0.0035 -220.50 0.06 22.99 0.10
10 0.0055 -344.50 0.16 37.13 -0.13
11 0.0058 -368.76 -0.13 39.93 0.06
12 0.0060 -380.43 0.25 41.17 -0.02
13 0.0062 -392.39 0.38 42.31 -0.24
14 0.0136 -859.59 -0.34 102.86 0.16
15 0.0138 -870.98 -0.01 104.19 -0.05
16 0.0140 -882.66 0.05 105.43 -0.35
17 0.0142 -894.66 0.01 107.61 0.25
18 0.0273 -1704.46 0.02 236.56 0.00
19 0.0275 -1712.42 0.21 238.03 0.08
20 0.0276 -1724.30 -0.18 239.83 -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.
15DT248 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