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: 15NB45
# Created Mon Apr 28 01:10:31 2025
# Orbit generated from Bernstein formalism
# Fitting 11 observations of 11
# Arc: 7.01d
# First observation: 2015/07/15
# Last observation: 2015/07/22
Preliminary a, adot, b, bdot, g, gdot:
0.000000 0.033871 0.000000 0.004569 0.026250 0.000000
# WARNING MRQMIN stopped after 13 iterations -- oscilliatory solution
# WARNING Fitting with energy constraint
# WARNING MRQMIN stopped after 13 iterations -- oscilliatory solution
# Chi-squared of fit: 3.99 DOF: 17 RMS: 0.11
# Min/Max residuals: -0.28 0.24
# Exact a, adot, b, bdot, g, gdot:
1.672578E-05 2.550933E-02 3.964811E-06 5.821019E-03 2.432251E-02 -1.149037E-03
# Covariance matrix:
1.2826E-11 1.9521E-08 -1.9816E-12 -2.9731E-09 4.4192E-09 8.8219E-09
1.9521E-08 3.0584E-05 -3.1013E-09 -4.6531E-06 6.9162E-06 1.3643E-05
-1.9816E-12 -3.1013E-09 6.5542E-13 4.5236E-10 -7.0138E-10 -1.3806E-09
-2.9731E-09 -4.6531E-06 4.5236E-10 7.0982E-07 -1.0523E-06 -2.0191E-06
4.4192E-09 6.9162E-06 -7.0138E-10 -1.0523E-06 1.5642E-06 3.1928E-06
8.8219E-09 1.3643E-05 -1.3806E-09 -2.0191E-06 3.1928E-06 3.3845E-04
# lat0 lon0 xBary yBary zBary JD0
8.934340 -19.795691 0.751257 0.106686 -0.678024 2457218.941809
# Heliocentric elements and errors
Epoch: 2457210.5000 = 2015/07/07
Mean Anomaly: 348.21349 +/- 124.873
Argument of Peri: 53.58626 +/- 206.102
Long of Asc Node: 305.77153 +/- 9.454
Inclination: 15.69021 +/- 3.727
Eccentricity: 0.23027757 +/- 0.3550
Semi-Major Axis: 53.73536068 +/- 17.9856
Time of Perihelion: 2461921.0481 +/- 49850.3
Perihelion: 41.36131250 +/- 23.5716
Aphelion: 66.10940886 +/- 29.2161
Period (y) 393.9113 +/- 197.77
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 38.60334787 +/- 1.9650
Ecliptic Y -14.69402512 +/- 0.7074
Ecliptic Z 6.38535441 +/- 0.3284
Ecliptic XDOT 0.00075422 +/- 0.0020
Ecliptic YDOT 0.00277321 +/- 0.0008
Ecliptic ZDOT 0.00062726 +/- 0.0003
# Distances at JD0 (AU)
Heliocenter to KBO 41.79599972 +/- 1.8325
Geocenter to KBO 41.11417334 +/- 2.1141
# Hcoef: 8.86
The following table shows the complete astrometric record for 15NB45. 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 (15NB45) followed by the observatory code and reference code for the source of the astrometry.
2015 07 15.44102 22 33 26.85 +00 32 20.5 25.6r 15NB45 T09 C~8ncf 2015 07 15.46513 22 33 26.77 +00 32 20.4 25.1r 15NB45 T09 C~8ncf 2015 07 15.46726 22 33 26.77 +00 32 20.4 24.9r 15NB45 T09 C~8ncf 2015 07 15.50197 22 33 26.67 +00 32 20.4 25.1r 15NB45 T09 C~8ncf 2015 07 21.45179 22 33 07.84 +00 31 47.1 25.5i 15NB45 T09 C~8ncf 2015 07 21.48446 22 33 07.73 +00 31 46.8 24.9i 15NB45 T09 C~8ncf 2015 07 21.50079 22 33 07.69 +00 31 46.8 24.7i 15NB45 T09 C~8ncf 2015 07 21.54156 22 33 07.54 +00 31 46.4 24.7i 15NB45 T09 C~8ncf 2015 07 22.41440 22 33 04.60 +00 31 40.1 24.3z 15NB45 T09 C~8ncf 2015 07 22.43553 22 33 04.53 +00 31 39.7 24.6z 15NB45 T09 C~8ncf 2015 07 22.45169 22 33 04.46 +00 31 39.4 25.0z 15NB45 T09 C~8ncf
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 -0.04
2 0.0001 -1.15 -0.12 0.36 -0.00
3 0.0001 -1.15 -0.03 0.36 -0.03
4 0.0002 -2.54 0.11 0.92 0.06
5 0.0165 -276.91 -0.02 75.75 0.06
6 0.0165 -278.55 -0.02 76.09 -0.01
7 0.0166 -279.11 0.24 76.32 0.01
8 0.0167 -281.35 0.06 76.79 -0.04
9 0.0191 -324.60 0.03 87.45 0.18
10 0.0191 -325.72 -0.02 87.47 -0.06
11 0.0192 -326.81 -0.28 87.59 -0.14
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.
15NB45 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