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: NI500
# Created Wed Jun 4 01:12:16 2025
# Orbit generated from Bernstein formalism
# Fitting 10 observations of 10
# Arc: 3.78h
# First observation: 2014/06/26
# Last observation: 2014/06/26
# WARNING Fitting with energy constraint
# WARNING and with gdot fixed = 0
# Chi-squared of fit: 0.07 DOF: 16 RMS: 0.01
# Min/Max residuals: -0.03 0.03
# Exact a, adot, b, bdot, g, gdot:
1.514081E-05 2.272944E-02 -3.782691E-07 -4.904624E-04 2.356924E-02 0.000000E+00
# Covariance matrix:
3.1289E-11 4.5688E-08 -8.6759E-14 -9.9611E-11 7.8004E-09 0.0000E+00
4.5688E-08 6.7461E-05 -1.2387E-10 -1.4039E-07 1.1294E-05 0.0000E+00
-8.6759E-14 -1.2387E-10 1.0550E-12 1.9930E-09 -2.2904E-11 0.0000E+00
-9.9611E-11 -1.4039E-07 1.9930E-09 4.3747E-06 -2.6925E-08 0.0000E+00
7.8004E-09 1.1294E-05 -2.2904E-11 -2.6925E-08 2.0053E-06 0.0000E+00
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 1.7229E-04
# lat0 lon0 xBary yBary zBary JD0
2.142348 -79.448896 0.105648 0.037945 -1.012184 2456834.870018
# Heliocentric elements and errors
Epoch: 2456830.5000 = 2014/06/22
Mean Anomaly: 356.04323 +/- 234.971
Argument of Peri: 124.59909 +/- 306.059
Long of Asc Node: 159.88755 +/- 107.695
Inclination: 2.42876 +/- 2.689
Eccentricity: 0.01940265 +/- 0.5624
Semi-Major Axis: 44.29579860 +/- 22.9509
Time of Perihelion: 2458014.0346 +/- 501009.8
Perihelion: 43.43634285 +/- 33.5738
Aphelion: 45.15525434 +/- 34.1772
Period (y) 294.8166 +/- 229.13
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 7.84396836 +/- 0.4663
Ecliptic Y -42.69491885 +/- 2.5043
Ecliptic Z 1.58608235 +/- 0.0953
Ecliptic XDOT 0.00259091 +/- 0.0008
Ecliptic YDOT 0.00047754 +/- 0.0015
Ecliptic ZDOT -0.00005681 +/- 0.0002
# Distances at JD0 (AU)
Heliocenter to KBO 43.43845753 +/- 2.4629
Geocenter to KBO 42.42817290 +/- 2.5492
# Hcoef: 11.01
The following table shows the complete astrometric record for NI500. 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 (NI500) followed by the observatory code and reference code for the source of the astrometry.
2014 06 26.36924 18 45 10.6717 -20 53 03.179 26.8R NI500 500 2014 06 26.37538 18 45 10.6411 -20 53 03.216 26.9R NI500 500 2014 06 26.38153 18 45 10.6087 -20 53 03.262 26.9R NI500 500 2014 06 26.38767 18 45 10.5783 -20 53 03.283 NI500 500 2014 06 26.39382 18 45 10.5477 -20 53 03.321 26.8R NI500 500 2014 06 26.50197 18 45 10.0207 -20 53 03.889 NI500 500 2014 06 26.50811 18 45 09.9883 -20 53 03.924 26.9R NI500 500 2014 06 26.51426 18 45 09.9573 -20 53 03.963 27.1R NI500 500 2014 06 26.52040 18 45 09.9266 -20 53 03.987 27.3R NI500 500 2014 06 26.52655 18 45 09.8978 -20 53 04.037 27.2R NI500 500
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 0.01
2 0.0000 -0.42 0.02 -0.01 0.00
3 0.0000 -0.89 -0.02 -0.02 -0.01
4 0.0001 -1.31 -0.01 -0.01 0.00
5 0.0001 -1.74 -0.03 -0.01 -0.01
6 0.0004 -9.15 0.03 0.00 0.01
7 0.0004 -9.60 0.01 -0.00 0.00
8 0.0004 -10.04 -0.01 -0.01 -0.00
9 0.0004 -10.47 -0.02 0.01 0.01
10 0.0004 -10.88 -0.00 -0.01 -0.01
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.
NI500 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