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: VNH0023
# Created Wed Jun 4 01:12:16 2025
# Orbit generated from Bernstein formalism
# Fitting 18 observations of 18
# Arc: 2.08d
# First observation: 2012/04/17
# Last observation: 2012/04/19
Preliminary a, adot, b, bdot, g, gdot:
-0.000000 0.026251 -0.000000 -0.008962 0.026752 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: 1.41 DOF: 31 RMS: 0.05
# Min/Max residuals: -0.11 0.11
# Exact a, adot, b, bdot, g, gdot:
1.522836E-05 2.548884E-02 -5.405723E-06 -8.874058E-03 2.636154E-02 2.577600E-04
# Covariance matrix:
4.0982E-11 7.1254E-08 -4.6461E-12 -7.6774E-09 3.5501E-08 2.2318E-08
7.1254E-08 1.2481E-04 -8.1311E-09 -1.3436E-05 6.2131E-05 3.6937E-05
-4.6461E-12 -8.1311E-09 7.6857E-13 8.2467E-10 -4.0483E-09 -2.5615E-09
-7.6774E-09 -1.3436E-05 8.2467E-10 1.4631E-06 -6.6896E-06 -4.3607E-06
3.5501E-08 6.2131E-05 -4.0483E-09 -6.6896E-06 3.0933E-05 1.9283E-05
2.2318E-08 3.6937E-05 -2.5615E-09 -4.3607E-06 1.9283E-05 1.2038E-02
# lat0 lon0 xBary yBary zBary JD0
2.093258 -81.028112 0.954654 0.011735 -0.320972 2456034.841006
# Heliocentric elements and errors
Epoch: 2456030.5000 = 2012/04/13
Mean Anomaly: 311.25821 +/- 209.152
Argument of Peri: 224.19604 +/- 321.820
Long of Asc Node: 103.49220 +/- 1.645
Inclination: 19.27754 +/- 5.782
Eccentricity: 0.02018948 +/- 3.0563
Semi-Major Axis: 38.77281897 +/- 2.7068
Time of Perihelion: 2467970.0628 +/- 1814911.3
Perihelion: 37.99001580 +/- 118.5329
Aphelion: 39.55562214 +/- 118.5354
Period (y) 241.4345 +/- 25.28
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 5.02229104 +/- 1.2472
Ecliptic Y -37.90919958 +/- 7.9002
Ecliptic Z 1.38538709 +/- 0.2923
Ecliptic XDOT 0.00261929 +/- 0.0019
Ecliptic YDOT 0.00035684 +/- 0.0112
Ecliptic ZDOT -0.00091995 +/- 0.0004
# Distances at JD0 (AU)
Heliocenter to KBO 38.26552126 +/- 7.8283
Geocenter to KBO 37.93405444 +/- 8.0033
# Hcoef: 12.75
The following table shows the complete astrometric record for VNH0023. 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 (VNH0023) followed by the observatory code and reference code for the source of the astrometry.
2012 04 17.34024 18 38 27.033 -21 02 49.74 29.0R VNH0023 304 2012 04 17.34199 18 38 27.035 -21 02 49.72 VNH0023 304 2012 04 17.38720 18 38 26.980 -21 02 49.92 VNH0023 304 2012 04 17.41592 18 38 26.948 -21 02 49.93 VNH0023 304 2012 04 18.26755 18 38 26.081 -21 02 52.33 VNH0023 304 2012 04 18.31485 18 38 26.028 -21 02 52.52 VNH0023 304 2012 04 18.36265 18 38 25.972 -21 02 52.58 VNH0023 304 2012 04 18.40528 18 38 25.920 -21 02 52.66 25.0R VNH0023 304 2012 04 19.30535 18 38 24.902 -21 02 55.25 VNH0023 304 2012 04 19.30697 18 38 24.904 -21 02 55.27 28.2R VNH0023 304 2012 04 19.31726 18 38 24.891 -21 02 55.29 28.1R VNH0023 304 2012 04 19.33912 18 38 24.866 -21 02 55.47 28.8R VNH0023 304 2012 04 19.35214 18 38 24.840 -21 02 55.44 VNH0023 304 2012 04 19.36184 18 38 24.826 -21 02 55.45 28.7R VNH0023 304 2012 04 19.36529 18 38 24.821 -21 02 55.44 29.5R VNH0023 304 2012 04 19.39905 18 38 24.777 -21 02 55.50 VNH0023 304 2012 04 19.40424 18 38 24.766 -21 02 55.55 VNH0023 304 2012 04 19.41581 18 38 24.755 -21 02 55.53 29.5R VNH0023 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 0.01 0.00 0.02
2 0.0000 0.03 0.07 0.02 0.04
3 0.0001 -0.75 -0.03 -0.13 -0.03
4 0.0002 -1.20 -0.04 -0.11 0.04
5 0.0025 -13.47 -0.03 -1.70 -0.05
6 0.0027 -14.22 -0.01 -1.84 -0.09
7 0.0028 -15.01 -0.00 -1.85 -0.01
8 0.0029 -15.74 -0.02 -1.88 0.03
9 0.0054 -30.13 0.02 -3.52 0.01
10 0.0054 -30.11 0.08 -3.54 -0.00
11 0.0054 -30.29 0.08 -3.55 0.01
12 0.0055 -30.65 0.11 -3.70 -0.11
13 0.0055 -31.01 -0.01 -3.65 -0.03
14 0.0055 -31.21 -0.03 -3.64 -0.01
15 0.0055 -31.28 -0.04 -3.63 0.01
16 0.0056 -31.90 -0.04 -3.65 0.06
17 0.0057 -32.05 -0.10 -3.69 0.02
18 0.0057 -32.20 -0.04 -3.66 0.07
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.
VNH0023 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