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: 13JW63 # Created Wed Apr 24 01:14:34 2024 # Orbit generated from Bernstein formalism # Fitting 20 observations of 20 # Arc: 4.97y # First observation: 2013/05/08 # Last observation: 2018/04/28 Preliminary a, adot, b, bdot, g, gdot: -0.000189 0.021886 -0.000004 0.001039 0.022597 0.000000 # Chi-squared of fit: 12.17 DOF: 34 RMS: 0.14 # Min/Max residuals: -0.29 0.35 # Exact a, adot, b, bdot, g, gdot: 1.321710E-05 2.157035E-02 1.294349E-06 1.028431E-03 2.285256E-02 -2.051676E-03 # Covariance matrix: 2.6286E-13 -2.1984E-13 2.0443E-15 -8.1206E-15 6.3711E-14 -1.5372E-12 -2.1984E-13 4.3302E-13 -7.1282E-15 1.9674E-14 -2.8102E-14 3.6581E-12 2.0443E-15 -7.1282E-15 1.8323E-13 -4.3120E-14 -1.0514E-14 -6.6531E-14 -8.1206E-15 1.9674E-14 -4.3120E-14 1.7498E-14 1.4153E-15 1.7379E-13 6.3711E-14 -2.8102E-14 -1.0514E-14 1.4153E-15 5.7845E-13 -4.1255E-14 -1.5372E-12 3.6581E-12 -6.6531E-14 1.7379E-13 -4.1255E-14 3.2204E-11 # lat0 lon0 xBary yBary zBary JD0 -7.415706 -119.705543 0.220339 -0.127387 -0.979056 2456420.759308 # Heliocentric elements and errors Epoch: 2456420.5000 = 2013/05/08 Mean Anomaly: 285.17913 +/- 0.049 Argument of Peri: 16.65500 +/- 0.075 Long of Asc Node: 309.33050 +/- 0.002 Inclination: 7.74630 +/- 0.000 Eccentricity: 0.09974838 +/- 0.0003 Semi-Major Axis: 45.48843425 +/- 0.0063 Time of Perihelion: 2479710.5374 +/- 14.4 Perihelion: 40.95103654 +/- 0.0130 Aphelion: 50.02583196 +/- 0.0136 Period (y) 306.8031 +/- 0.06 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -22.18261853 +/- 0.0007 Ecliptic Y -38.43637032 +/- 0.0013 Ecliptic Z -5.64776040 +/- 0.0002 Ecliptic XDOT 0.00235120 +/- 0.0000 Ecliptic YDOT -0.00108265 +/- 0.0000 Ecliptic ZDOT 0.00015405 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 44.73611880 +/- 0.0011 Geocenter to KBO 43.75877810 +/- 0.0015 # Hcoef: 5.02
The following table shows the complete astrometric record for 13JW63. 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 (13JW63) followed by the observatory code and reference code for the source of the astrometry.
2013 05 08.25853 15 45 29.920 -27 27 12.91 13JW63 807 C~143e 2013 05 08.31411 15 45 29.621 -27 27 11.91 21.6r 13JW63 807 C~143e 2013 05 08.36487 15 45 29.369 -27 27 11.37 13JW63 807 C~143e 2013 07 08.01509 15 41 02.695 -27 09 59.39 13JW63 304 C~143e 2013 07 08.03924 15 41 02.623 -27 09 58.87 13JW63 304 C~143e 2014 03 27.368994 15 53 44.43 -27 43 56.0 21.8V 13JW63 W84 C~3ssL 2014 03 27.407719 15 53 44.34 -27 43 56.0 21.9V 13JW63 W84 C~3ssL 2014 05 01.31171 15 51 34.438 -27 41 09.09 13JW63 304 C~143e 2014 05 02.35072 15 51 29.556 -27 40 58.20 21.5r 13JW63 304 C~143e 2014 05 02.39372 15 51 29.365 -27 40 57.74 13JW63 304 C~143e 2017 05 17.244600 16 07 04.45 -28 11 24.6 21.0y 13JW63 W84 C~3ssL 2017 05 17.252885 16 07 04.39 -28 11 24.5 21.1y 13JW63 W84 C~3ssL 2017 05 17.255319 16 07 04.39 -28 11 24.5 20.9y 13JW63 W84 C~3ssL 2017 05 17.257403 16 07 04.36 -28 11 24.6 21.2y 13JW63 W84 C~3ssL 2018 04 28.347534 16 14 17.32 -28 23 47.4 21.4z 13JW63 W84 C~3ssL 2018 04 28.348563 16 14 17.30 -28 23 47.3 21.6z 13JW63 W84 C~3ssL 2018 04 28.349608 16 14 17.30 -28 23 47.5 21.0z 13JW63 W84 C~3ssL 2018 04 28.350635 16 14 17.29 -28 23 47.6 21.2z 13JW63 W84 C~3ssL 2018 04 28.351652 16 14 17.29 -28 23 47.4 21.1z 13JW63 W84 C~3ssL 2018 04 28.352682 16 14 17.28 -28 23 47.4 21.3z 13JW63 W84 C~3ssL
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 0.35 0.00 -0.12
2 0.0002 -4.10 -0.02 0.09 0.07
3 0.0003 -7.49 -0.02 -0.13 -0.06
4 0.1663 -3703.50 -0.12 200.04 -0.27
5 0.1664 -3704.55 -0.13 200.33 -0.16
6 0.8846 6638.55 -0.29 427.24 0.11
7 0.8847 6637.38 -0.17 427.00 0.17
8 0.9803 4913.95 0.28 231.31 0.06
9 0.9831 4848.23 -0.04 228.32 0.13
10 0.9833 4845.65 0.13 228.24 0.16
11 4.0246 17395.59 0.16 851.88 0.08
12 4.0246 17394.79 -0.08 851.84 0.04
13 4.0246 17394.79 0.09 851.84 0.04
14 4.0246 17394.41 -0.14 851.67 -0.13
15 4.9722 23211.80 0.15 1104.51 0.05
16 4.9722 23211.52 -0.07 1104.56 0.11
17 4.9722 23211.56 0.02 1104.36 -0.08
18 4.9722 23211.44 -0.03 1104.24 -0.20
19 4.9722 23211.41 -0.00 1104.44 0.00
20 4.9722 23211.28 -0.07 1104.42 -0.02
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.
13JW63 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 45.372 45.391 45.354 ecceobj 0.103 0.103 0.103 incobj 7.741 7.741 7.741 qmin 40.326 40.380 40.336 qmax 51.347 51.326 51.373 amean 45.700 45.719 45.682 amin 45.338 45.343 45.319 amax 46.113 46.121 46.081 emean 0.102 0.102 0.102 emin 0.090 0.090 0.089 emax 0.114 0.113 0.115 imean 9.140 9.140 9.140 imin 8.703 8.706 8.702 imax 9.553 9.556 9.556 excite_mean 0.189 0.189 0.189 fracstop 1.000 1.000 1.000 cjmean 3.078 3.079 3.078 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 175.4 175.2 175.5 kozaiamp 179.9 180.0 180.0