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: 15DO249 # Created Wed Nov 27 02:10:13 2024 # Orbit generated from Bernstein formalism # Fitting 18 observations of 18 # Arc: 7.03d # First observation: 2015/02/17 # Last observation: 2015/02/24 Preliminary a, adot, b, bdot, g, gdot: -0.000000 0.043836 0.000001 -0.008378 0.030955 0.000000 # WARNING Fitting with energy constraint # WARNING MRQMIN stopped after 13 iterations -- oscilliatory solution # Chi-squared of fit: 27.77 DOF: 31 RMS: 0.22 # Min/Max residuals: -0.46 0.49 # Exact a, adot, b, bdot, g, gdot: 1.763485E-05 3.270423E-02 -4.513925E-06 -8.627033E-03 2.918710E-02 -9.015424E-04 # Covariance matrix: 1.7394E-11 3.2129E-08 1.4940E-12 7.2555E-10 5.0873E-09 1.6066E-08 3.2129E-08 6.0019E-05 2.7863E-09 1.3560E-06 9.4965E-06 2.2974E-05 1.4940E-12 2.7863E-09 2.8723E-13 5.0273E-11 4.4100E-10 1.3738E-09 7.2555E-10 1.3560E-06 5.0273E-11 3.2751E-08 2.1452E-07 4.1340E-07 5.0873E-09 9.4965E-06 4.4100E-10 2.1452E-07 1.5027E-06 3.9016E-06 1.6066E-08 2.2974E-05 1.3738E-09 4.1340E-07 3.9016E-06 6.2033E-04 # lat0 lon0 xBary yBary zBary JD0 -14.678566 155.785386 0.135557 -0.247092 -0.944045 2457070.658818 # Heliocentric elements and errors Epoch: 2457070.5000 = 2015/02/17 Mean Anomaly: 353.08546 +/- 157.478 Argument of Peri: 235.61222 +/- 244.373 Long of Asc Node: 292.51201 +/- 7.249 Inclination: 20.44237 +/- 2.559 Eccentricity: 0.20566816 +/- 0.3867 Semi-Major Axis: 44.19472669 +/- 19.0660 Time of Perihelion: 2459131.6751 +/- 46924.2 Perihelion: 35.10527848 +/- 22.8363 Aphelion: 53.28417490 +/- 28.6452 Period (y) 293.8082 +/- 190.13 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -31.06500894 +/- 1.2695 Ecliptic Y 14.11790781 +/- 0.5711 Ecliptic Z -8.68198171 +/- 0.3647 Ecliptic XDOT -0.00100029 +/- 0.0021 Ecliptic YDOT -0.00292108 +/- 0.0010 Ecliptic ZDOT -0.00076131 +/- 0.0006 # Distances at JD0 (AU) Heliocenter to KBO 35.20975586 +/- 1.1468 Geocenter to KBO 34.26171561 +/- 1.4390 # Hcoef: 8.52
The following table shows the complete astrometric record for 15DO249. 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 (15DO249) followed by the observatory code and reference code for the source of the astrometry.
2015 02 17.15804 10 08 52.07 -04 16 54.2 15DO249 W84 C~2iOW 2015 02 17.24395 10 08 51.60 -04 16 52.2 24.1g 15DO249 W84 C~2iOW 2015 02 17.31277 10 08 51.18 -04 16 50.5 24.4g 15DO249 W84 C~2iOW 2015 02 17.35977 10 08 50.96 -04 16 49.5 25.3g 15DO249 W84 C~2iOW 2015 02 18.08711 10 08 46.95 -04 16 32.5 24.5g 15DO249 W84 C~2iOW 2015 02 18.15457 10 08 46.55 -04 16 31.1 24.0g 15DO249 W84 C~2iOW 2015 02 18.22275 10 08 46.17 -04 16 29.5 24.0g 15DO249 W84 C~2iOW 2015 02 18.29298 10 08 45.77 -04 16 28.1 24.1g 15DO249 W84 C~2iOW 2015 02 18.36188 10 08 45.42 -04 16 26.5 24.3g 15DO249 W84 C~2iOW 2015 02 19.08387 10 08 41.48 -04 16 09.1 24.5g 15DO249 W84 C~2iOW 2015 02 19.22097 10 08 40.68 -04 16 06.4 24.3g 15DO249 W84 C~2iOW 2015 02 19.28987 10 08 40.28 -04 16 04.4 15DO249 W84 C~2iOW 2015 02 19.35896 10 08 39.87 -04 16 03.1 24.6g 15DO249 W84 C~2iOW 2015 02 22.07638 10 08 24.92 -04 14 55.9 15DO249 W84 C~2iOW 2015 02 22.21208 10 08 24.14 -04 14 52.5 15DO249 W84 C~2iOW 2015 02 22.28094 10 08 23.76 -04 14 50.9 15DO249 W84 C~2iOW 2015 02 24.12845 10 08 13.62 -04 14 03.1 15DO249 W84 C~2iOW 2015 02 24.19009 10 08 13.24 -04 14 01.7 15DO249 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 0.02 0.00 -0.03
2 0.0002 -7.28 0.17 -0.69 0.07
3 0.0004 -13.75 -0.35 -1.40 0.00
4 0.0006 -17.18 0.27 -1.66 0.16
5 0.0025 -79.23 -0.04 -7.65 0.27
6 0.0027 -85.32 -0.28 -8.52 -0.00
7 0.0029 -91.19 -0.25 -9.10 0.02
8 0.0031 -97.27 -0.24 -9.97 -0.23
9 0.0033 -102.73 0.26 -10.39 -0.06
10 0.0053 -163.96 0.49 -15.62 0.43
11 0.0056 -176.09 0.26 -17.46 -0.26
12 0.0058 -182.39 -0.05 -17.78 -0.00
13 0.0060 -188.58 -0.25 -18.80 -0.46
14 0.0135 -421.33 0.09 -37.58 0.12
15 0.0138 -433.43 -0.17 -38.66 -0.01
16 0.0140 -439.31 -0.04 -39.24 -0.11
17 0.0191 -597.99 0.22 -49.93 0.26
18 0.0193 -603.79 -0.20 -50.69 -0.13
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.
15DO249 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