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: NI242
# Created Wed Jun 4 01:12:16 2025
# Orbit generated from Bernstein formalism
# Fitting 9 observations of 9
# Arc: 4.03d
# First observation: 2014/05/02
# Last observation: 2014/05/06
Preliminary a, adot, b, bdot, g, gdot:
0.000000 0.031057 0.000000 0.001011 0.026975 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: 1.58 DOF: 13 RMS: 0.07
# Min/Max residuals: -0.11 0.17
# Exact a, adot, b, bdot, g, gdot:
1.689620E-05 2.662839E-02 9.069033E-07 1.209162E-03 2.560146E-02 -8.278071E-04
# Covariance matrix:
1.0486E-11 1.8435E-08 -5.5756E-13 -8.4985E-10 5.6331E-09 1.3459E-08
1.8435E-08 3.5786E-05 -1.0757E-09 -1.6400E-06 1.0870E-05 2.3753E-05
-5.5756E-13 -1.0757E-09 9.1109E-13 -5.3383E-11 -3.2688E-10 -8.1232E-10
-8.4985E-10 -1.6400E-06 -5.3383E-11 8.9923E-08 -4.9833E-07 -1.0580E-06
5.6331E-09 1.0870E-05 -3.2688E-10 -4.9833E-07 3.3029E-06 7.4244E-06
1.3459E-08 2.3753E-05 -8.1232E-10 -1.0580E-06 7.4244E-06 1.1048E-03
# lat0 lon0 xBary yBary zBary JD0
1.632770 -78.909176 0.866346 0.014762 -0.514798 2456779.856298
# Heliocentric elements and errors
Epoch: 2456770.5000 = 2014/04/23
Mean Anomaly: 331.01959 +/- 175.325
Argument of Peri: 66.41941 +/- 315.261
Long of Asc Node: 248.49409 +/- 11.718
Inclination: 3.09568 +/- 1.033
Eccentricity: 0.09829194 +/- 0.7329
Semi-Major Axis: 43.18500259 +/- 9.3910
Time of Perihelion: 2465114.9909 +/- 154115.0
Perihelion: 38.94026504 +/- 32.7619
Aphelion: 47.42974013 +/- 33.2869
Period (y) 283.7969 +/- 92.57
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 6.75863928 +/- 0.5331
Ecliptic Y -38.98519525 +/- 2.7199
Ecliptic Z 1.11301516 +/- 0.0790
Ecliptic XDOT 0.00277136 +/- 0.0008
Ecliptic YDOT 0.00063480 +/- 0.0035
Ecliptic ZDOT 0.00012686 +/- 0.0001
# Distances at JD0 (AU)
Heliocenter to KBO 39.58236294 +/- 2.6804
Geocenter to KBO 39.06027043 +/- 2.7728
# Hcoef: 13.45
The following table shows the complete astrometric record for NI242. 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 (NI242) followed by the observatory code and reference code for the source of the astrometry.
2014 05 02.35552 18 47 39.503 -21 20 56.30 29.4R NI242 304 2014 05 04.36405 18 47 35.027 -21 20 55.50 28.8R NI242 304 2014 05 04.40415 18 47 34.936 -21 20 55.62 29.1R NI242 304 2014 05 05.28248 18 47 32.847 -21 20 55.41 29.5R NI242 304 2014 05 05.32113 18 47 32.748 -21 20 55.41 NI242 304 2014 05 05.41150 18 47 32.518 -21 20 55.57 NI242 304 2014 05 06.26334 18 47 30.435 -21 20 55.42 29.1R NI242 304 2014 05 06.34712 18 47 30.222 -21 20 55.44 NI242 304 2014 05 06.38240 18 47 30.125 -21 20 55.52 29.1R NI242 304
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 -0.09 0.00 -0.03
2 0.0055 -62.26 0.09 5.93 0.09
3 0.0056 -63.53 0.17 5.92 -0.04
4 0.0080 -92.60 -0.02 8.52 0.05
5 0.0081 -93.98 -0.05 8.63 0.06
6 0.0084 -97.20 -0.11 8.74 -0.10
7 0.0107 -126.19 -0.02 11.27 0.02
8 0.0109 -129.15 0.04 11.49 0.01
9 0.0110 -130.51 -0.04 11.53 -0.06
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.
NI242 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