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: NI09
# Created Wed Jun 4 01:12:16 2025
# Orbit generated from Bernstein formalism
# Fitting 12 observations of 12
# Arc: 1.15y
# First observation: 2004/06/09
# Last observation: 2005/08/03
Preliminary a, adot, b, bdot, g, gdot:
-0.000001 0.020548 -0.000001 -0.000893 0.022166 0.000000
# Chi-squared of fit: 3.46 DOF: 18 RMS: 0.09
# Min/Max residuals: -0.22 0.19
# Exact a, adot, b, bdot, g, gdot:
1.454068E-05 2.059704E-02 -1.542779E-06 -8.985329E-04 2.220389E-02 2.668581E-05
# Covariance matrix:
3.5100E-13 5.8600E-12 3.4483E-14 -9.9221E-13 3.1120E-12 8.2648E-10
5.8600E-12 9.0960E-10 5.4488E-12 -1.5857E-10 4.0493E-10 1.3164E-07
3.4483E-14 5.4488E-12 2.2956E-13 -1.1334E-12 2.4205E-12 7.8968E-10
-9.9221E-13 -1.5857E-10 -1.1334E-12 2.8139E-11 -7.0399E-11 -2.2986E-08
3.1120E-12 4.0493E-10 2.4205E-12 -7.0399E-11 1.8191E-10 5.8453E-08
8.2648E-10 1.3164E-07 7.8968E-10 -2.2986E-08 5.8453E-08 1.9081E-05
# lat0 lon0 xBary yBary zBary JD0
1.815893 -90.522839 0.183742 0.031713 -0.998960 2453165.895673
# Heliocentric elements and errors
Epoch: 2453160.5000 = 2004/06/04
Mean Anomaly: 0.34283 +/- 277.372
Argument of Peri: 144.17142 +/- 301.688
Long of Asc Node: 124.67185 +/- 0.021
Inclination: 3.06270 +/- 0.002
Eccentricity: 0.00344223 +/- 0.0042
Semi-Major Axis: 46.19379830 +/- 0.1066
Time of Perihelion: 2453051.2945 +/- 1120442.9
Perihelion: 46.03478848 +/- 0.2219
Aphelion: 46.35280812 +/- 0.2222
Period (y) 313.9668 +/- 1.09
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -0.60693067 +/- 0.0003
Ecliptic Y -46.00866262 +/- 0.0273
Ecliptic Z 1.42710895 +/- 0.0009
Ecliptic XDOT 0.00253704 +/- 0.0000
Ecliptic YDOT -0.00003695 +/- 0.0005
Ecliptic ZDOT -0.00011051 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 46.03479164 +/- 0.0273
Geocenter to KBO 45.03715828 +/- 0.0274
# Hcoef: 6.90
The following table shows the complete astrometric record for NI09. 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 (NI09) followed by the observatory code and reference code for the source of the astrometry.
2004 06 09.39493 17 57 45.088 -21 37 20.56 23.0R NI09 568 2004 06 10.36840 17 57 40.579 -21 37 20.76 23.0R NI09 568 2004 06 10.44383 17 57 40.213 -21 37 20.35 23.0R NI09 568 2004 06 11.38378 17 57 35.850 -21 37 20.26 23.1R NI09 568 2004 06 11.46896 17 57 35.444 -21 37 20.39 23.3R NI09 568 2004 07 14.39628 17 55 03.759 -21 37 33.62 23.0R NI09 568 2004 07 16.28349 17 54 55.804 -21 37 35.53 23.1R NI09 568 2004 07 16.37752 17 54 55.408 -21 37 35.68 23.1R NI09 568 2005 08 02.29890 17 58 55.724 -21 41 28.06 23.4R NI09 568 2005 08 02.41965 17 58 55.312 -21 41 28.40 23.7R NI09 568 2005 08 03.29572 17 58 52.384 -21 41 30.09 23.3R NI09 568 2005 08 03.38840 17 58 52.070 -21 41 30.21 23.2R NI09 568
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 0.19
2 0.0027 -62.87 0.06 -0.45 -0.22
3 0.0029 -67.98 -0.08 -0.06 0.19
4 0.0054 -128.82 0.01 -0.22 0.11
5 0.0057 -134.48 -0.02 -0.37 -0.02
6 0.0958 -2249.59 -0.06 -26.71 -0.06
7 0.1010 -2360.51 -0.00 -29.54 -0.09
8 0.1013 -2366.03 0.07 -29.74 -0.13
9 1.1469 985.48 0.05 -244.59 0.05
10 1.1472 979.74 0.11 -244.94 -0.06
11 1.1496 938.93 -0.08 -246.71 -0.01
12 1.1499 934.56 -0.08 -246.84 0.04
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.
NI09 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