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: 17BM239
# Created Wed Nov 27 02:10:46 2024
# Orbit generated from Bernstein formalism
# Fitting 11 observations of 11
# Arc: 23.98d
# First observation: 2017/01/30
# Last observation: 2017/02/23
Preliminary a, adot, b, bdot, g, gdot:
-0.000000 0.026710 0.000000 -0.002100 0.025081 0.000000
# WARNING Fitting with energy constraint
# Chi-squared of fit: 1.83 DOF: 17 RMS: 0.07
# Min/Max residuals: -0.16 0.13
# Exact a, adot, b, bdot, g, gdot:
1.569245E-05 2.440813E-02 -4.917835E-07 -1.925017E-03 2.442814E-02 -3.245645E-03
# Covariance matrix:
3.6635E-13 2.1127E-10 -3.5704E-14 -1.6381E-11 6.0312E-11 1.0212E-08
2.1127E-10 6.5495E-07 -8.6036E-11 -4.9955E-08 1.6455E-07 1.6096E-05
-3.5704E-14 -8.6036E-11 2.4135E-13 2.7986E-12 -2.2323E-11 -2.6665E-09
-1.6381E-11 -4.9955E-08 2.7986E-12 3.9578E-09 -1.2551E-08 -1.2261E-06
6.0312E-11 1.6455E-07 -2.2323E-11 -1.2551E-08 4.1941E-08 4.5094E-06
1.0212E-08 1.6096E-05 -2.6665E-09 -1.2261E-06 4.5094E-06 7.6044E-04
# lat0 lon0 xBary yBary zBary JD0
4.489182 -173.014344 0.823218 0.042664 -0.541376 2457784.138401
# Heliocentric elements and errors
Epoch: 2457780.5000 = 2017/01/27
Mean Anomaly: 306.55876 +/- 55.779
Argument of Peri: 206.02406 +/- 154.261
Long of Asc Node: 50.76771 +/- 1.116
Inclination: 6.26044 +/- 0.123
Eccentricity: 0.17060965 +/- 1.0955
Semi-Major Axis: 45.09371637 +/- 14.4769
Time of Perihelion: 2474199.4909 +/- 15204.1
Perihelion: 37.40029328 +/- 50.8380
Aphelion: 52.78713947 +/- 52.2257
Period (y) 302.8184 +/- 145.83
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -41.15022546 +/- 0.3396
Ecliptic Y -4.21715761 +/- 0.0416
Ecliptic Z 3.20410257 +/- 0.0269
Ecliptic XDOT 0.00067880 +/- 0.0031
Ecliptic YDOT -0.00267994 +/- 0.0004
Ecliptic ZDOT -0.00024362 +/- 0.0002
# Distances at JD0 (AU)
Heliocenter to KBO 41.48965831 +/- 0.3369
Geocenter to KBO 40.93639633 +/- 0.3432
# Hcoef: 8.54
The following table shows the complete astrometric record for 17BM239. 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 (17BM239) followed by the observatory code and reference code for the source of the astrometry.
2017 01 30.63760 12 32 45.05 +01 21 04.7 24.3z 17BM239 T09 C~85Ir 2017 01 30.64028 12 32 45.05 +01 21 04.9 24.1z 17BM239 T09 C~85Ir 2017 01 30.64296 12 32 45.04 +01 21 05.1 24.6z 17BM239 T09 C~85Ir 2017 01 30.64563 12 32 45.04 +01 21 05.1 24.3z 17BM239 T09 C~85Ir 2017 02 02.61643 12 32 38.77 +01 22 00.2 24.7i 17BM239 T09 C~85Ir 2017 02 02.63333 12 32 38.73 +01 22 00.5 24.5i 17BM239 T09 C~85Ir 2017 02 02.64170 12 32 38.71 +01 22 00.5 24.3i 17BM239 T09 C~85Ir 2017 02 23.55287 12 31 36.51 +01 30 04.1 25.2r 17BM239 T09 C~85Ir 2017 02 23.58469 12 31 36.39 +01 30 04.9 25.0r 17BM239 T09 C~85Ir 2017 02 23.58678 12 31 36.39 +01 30 04.9 24.6r 17BM239 T09 C~85Ir 2017 02 23.61866 12 31 36.27 +01 30 05.9 25.0r 17BM239 T09 C~85Ir
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 -0.16
2 0.0000 -0.08 0.04 0.18 0.02
3 0.0000 -0.30 -0.08 0.31 0.13
4 0.0000 -0.30 0.01 0.31 0.12
5 0.0082 -108.44 -0.01 13.80 0.03
6 0.0082 -109.11 -0.02 13.84 -0.00
7 0.0082 -109.38 0.04 13.72 -0.15
8 0.0655 -1157.27 -0.04 89.72 0.01
9 0.0656 -1159.24 -0.05 89.74 -0.04
10 0.0656 -1159.24 0.08 89.74 -0.04
11 0.0657 -1161.28 -0.00 89.95 0.09
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.