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: 15NC44
# Created Tue Apr 1 01:10:30 2025
# Orbit generated from Bernstein formalism
# Fitting 13 observations of 13
# Arc: 7.07d
# First observation: 2015/07/15
# Last observation: 2015/07/22
Preliminary a, adot, b, bdot, g, gdot:
-0.000000 0.021638 0.000001 0.000518 0.023731 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: 11.80 DOF: 21 RMS: 0.17
# Min/Max residuals: -0.37 0.33
# Exact a, adot, b, bdot, g, gdot:
1.479494E-05 2.269444E-02 1.028789E-06 3.562853E-04 2.393528E-02 8.391331E-03
# Covariance matrix:
1.2717E-11 1.9151E-08 -1.9159E-12 -2.8143E-09 4.2919E-09 -1.8536E-08
1.9151E-08 2.9696E-05 -2.9676E-09 -4.3592E-06 6.6479E-06 -2.8911E-05
-1.9159E-12 -2.9676E-09 6.3686E-13 4.1649E-10 -6.6438E-10 2.8811E-09
-2.8143E-09 -4.3592E-06 4.1649E-10 6.4157E-07 -9.7593E-07 4.2569E-06
4.2919E-09 6.6479E-06 -6.6438E-10 -9.7593E-07 1.4883E-06 -6.4053E-06
-1.8536E-08 -2.8911E-05 2.8811E-09 4.2569E-06 -6.4053E-06 2.2566E-04
# lat0 lon0 xBary yBary zBary JD0
8.758950 -20.188383 0.746535 0.105392 -0.683420 2457218.941809
# Heliocentric elements and errors
Epoch: 2457210.5000 = 2015/07/07
Mean Anomaly: 55.08040 +/- 55.677
Argument of Peri: 348.52798 +/- 64.508
Long of Asc Node: 256.10908 +/- 14.898
Inclination: 8.68597 +/- 0.292
Eccentricity: 0.34279690 +/- 0.6425
Semi-Major Axis: 46.90212711 +/- 23.2988
Time of Perihelion: 2439259.7812 +/- 12261.3
Perihelion: 30.82422313 +/- 33.8009
Aphelion: 62.98003109 +/- 43.4376
Period (y) 321.2159 +/- 239.35
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 39.14335130 +/- 1.9753
Ecliptic Y -15.18924441 +/- 0.7264
Ecliptic Z 6.36216589 +/- 0.3243
Ecliptic XDOT 0.00177814 +/- 0.0016
Ecliptic YDOT 0.00210490 +/- 0.0009
Ecliptic ZDOT 0.00018650 +/- 0.0003
# Distances at JD0 (AU)
Heliocenter to KBO 42.46636613 +/- 1.8398
Geocenter to KBO 41.77932910 +/- 2.1295
# Hcoef: 9.17
The following table shows the complete astrometric record for 15NC44. 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 (15NC44) followed by the observatory code and reference code for the source of the astrometry.
2015 07 15.44102 22 32 16.21 +00 13 52.7 25.7r 15NC44 T09 C~8ibh 2015 07 15.46302 22 32 16.14 +00 13 52.9 25.9r 15NC44 T09 C~8ibh 2015 07 15.48255 22 32 16.08 +00 13 52.4 25.5r 15NC44 T09 C~8ibh 2015 07 15.50197 22 32 16.01 +00 13 52.4 25.7r 15NC44 T09 C~8ibh 2015 07 21.45179 22 31 57.33 +00 12 57.9 25.0i 15NC44 T09 C~8ibh 2015 07 21.49810 22 31 57.17 +00 12 57.3 25.7i 15NC44 T09 C~8ibh 2015 07 21.50079 22 31 57.17 +00 12 57.3 25.7i 15NC44 T09 C~8ibh 2015 07 21.53078 22 31 57.06 +00 12 57.4 25.8i 15NC44 T09 C~8ibh 2015 07 22.41440 22 31 54.11 +00 12 47.2 24.4z 15NC44 T09 C~8ibh 2015 07 22.43006 22 31 54.06 +00 12 47.2 24.8z 15NC44 T09 C~8ibh 2015 07 22.44899 22 31 54.01 +00 12 47.4 25.4z 15NC44 T09 C~8ibh 2015 07 22.49224 22 31 53.87 +00 12 46.7 24.7z 15NC44 T09 C~8ibh 2015 07 22.51114 22 31 53.80 +00 12 46.0 24.9z 15NC44 T09 C~8ibh
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 -0.16
2 0.0001 -0.90 0.13 0.58 0.20
3 0.0001 -1.92 -0.01 0.45 -0.13
4 0.0002 -2.90 -0.11 0.84 0.07
5 0.0165 -283.18 -0.07 54.89 -0.00
6 0.0166 -285.63 -0.15 55.23 -0.08
7 0.0166 -285.63 -0.02 55.23 -0.11
8 0.0167 -287.12 0.03 55.94 0.33
9 0.0191 -331.98 -0.24 63.00 -0.13
10 0.0191 -332.68 -0.13 63.28 0.01
11 0.0192 -333.30 0.23 63.74 0.31
12 0.0193 -335.51 0.28 63.88 0.06
13 0.0194 -336.74 0.03 63.62 -0.37
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.
15NC44 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