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: 01FU172
# Created Sun Dec 22 02:08:14 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 31 observations of 31
# Arc: 5.18y
# First observation: 2001/03/22
# Last observation: 2006/05/26
# Chi-squared of fit: 62.28 DOF: 56 RMS: 0.25
# Min/Max residuals: -0.47 0.82
# Exact a, adot, b, bdot, g, gdot:
1.861752E-05 3.869350E-02 -7.981101E-06 -1.781328E-02 3.402471E-02 6.636131E-03
# Covariance matrix:
1.0729E-13 -8.2803E-14 -8.1713E-15 4.2026E-14 8.7488E-14 -4.9583E-13
-8.2803E-14 3.2361E-13 3.3435E-14 -1.7029E-13 -1.7706E-14 2.0062E-12
-8.1713E-15 3.3435E-14 7.0911E-14 -3.6529E-14 -5.1754E-15 2.2297E-13
4.2026E-14 -1.7029E-13 -3.6529E-14 1.1576E-13 2.7669E-14 -1.1366E-12
8.7488E-14 -1.7706E-14 -5.1754E-15 2.7669E-14 2.6922E-13 -3.2826E-13
-4.9583E-13 2.0062E-12 2.2297E-13 -1.1366E-12 -3.2826E-13 1.3393E-11
# lat0 lon0 xBary yBary zBary JD0
2.494795 -151.983104 0.436425 0.039026 -0.899726 2451990.954023
# Heliocentric elements and errors
Epoch: 2451990.5000 = 2001/03/22
Mean Anomaly: 23.45489 +/- 0.007
Argument of Peri: 133.56004 +/- 0.012
Long of Asc Node: 32.44031 +/- 0.000
Inclination: 24.77917 +/- 0.000
Eccentricity: 0.26755313 +/- 0.0001
Semi-Major Axis: 39.24419022 +/- 0.0052
Time of Perihelion: 2446140.0088 +/- 2.1
Perihelion: 28.74428430 +/- 0.0059
Aphelion: 49.74409614 +/- 0.0080
Period (y) 245.8506 +/- 0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -26.91734532 +/- 0.0004
Ecliptic Y -13.82556289 +/- 0.0002
Ecliptic Z 1.27912460 +/- 0.0000
Ecliptic XDOT 0.00092814 +/- 0.0000
Ecliptic YDOT -0.00302563 +/- 0.0000
Ecliptic ZDOT -0.00140858 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 30.28730332 +/- 0.0004
Geocenter to KBO 29.39033916 +/- 0.0004
# Hcoef: 8.26
The following table shows the complete astrometric record for 01FU172. 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 (01FU172) followed by the observatory code and reference code for the source of the astrometry.
2001 03 22.45328 13 47 41.29 -08 26 15.9 22.6R 01FU172 695 Cc9631 2001 03 22.46138 13 47 41.24 -08 26 15.6 22.6R 01FU172 695 Cc9631 2001 03 22.49623 13 47 41.05 -08 26 15.0 22.7R 01FU172 695 Cc9631 2001 03 23.46237 13 47 35.59 -08 25 51.9 22.6R 01FU172 695 Cc9631 2001 03 23.46890 13 47 35.56 -08 25 51.8 22.5R 01FU172 695 Cc9631 2001 03 23.47545 13 47 35.52 -08 25 51.7 22.5R 01FU172 695 Cc9631 2001 03 29.45718 13 47 00.63 -08 23 25.8 01FU172 695 Cc9631 2001 03 29.46496 13 47 00.57 -08 23 25.7 01FU172 695 Cc9631 2001 03 29.47257 13 47 00.51 -08 23 25.6 22.9R 01FU172 695 Cc9631 2001 03 30.45616 13 46 54.59 -08 23 01.3 22.6R 01FU172 695 Cc9631 2001 03 30.46279 13 46 54.56 -08 23 00.9 22.8R 01FU172 695 Cc9631 2001 03 30.46947 13 46 54.52 -08 23 00.9 22.8R 01FU172 695 Cc9631 2001 04 26.44933 13 44 03.27 -08 11 27.8 23.0R 01FU172 568 Cd0861 2001 04 26.49586 13 44 02.99 -08 11 26.5 01FU172 568 Cd0861 2001 04 27.45444 13 43 56.89 -08 11 02.9 01FU172 568 Cd0861 2001 05 19.30284 13 41 47.52 -08 03 19.4 23.1R 01FU172 568 Ce6595 2001 05 19.50451 13 41 46.42 -08 03 15.4 01FU172 568 Ce6595 2001 05 20.47154 13 41 41.34 -08 02 59.7 01FU172 568 Ce6595 2001 06 26.98957 13 39 28.01 -07 59 14.9 01FU172 304 Cd2352 2001 06 27.15085 13 39 27.72 -07 59 15.8 01FU172 304 Cd2352 2002 03 08.53854 13 55 44.98 -10 14 07.6 22.7R 01FU172 568 Cf2334 2002 03 08.59688 13 55 44.73 -10 14 06.6 01FU172 568 Cf2334 2002 03 13.39408 13 55 22.82 -10 12 45.9 01FU172 696 Cf2334 2002 03 13.45266 13 55 22.53 -10 12 44.9 01FU172 696 Cf2334 2002 03 14.38400 13 55 18.07 -10 12 28.2 01FU172 696 Cf2334 2002 03 14.40296 13 55 17.94 -10 12 27.4 01FU172 696 Cf2334 2004 04 22.39709 14 05 12.04 -13 19 54.0 22.9R 01FU172 568 Ck9562 2004 04 22.46108 14 05 11.61 -13 19 52.5 01FU172 568 Ck9562 2006 05 26.237865 14 15 35.60 -16 22 11.0 01FU172 645 C~1SKo 2006 05 26.238695 14 15 35.59 -16 22 11.0 01FU172 645 C~1SKo 2006 05 26.241183 14 15 35.58 -16 22 10.9 01FU172 645 C~1SKo
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 -0.15 0.00 -0.01
2 0.0000 0.00 -0.20 0.00 0.10
3 0.0001 0.00 -0.07 0.00 -0.12
4 0.0028 0.00 -0.28 0.00 0.24
5 0.0028 0.00 -0.17 0.00 0.19
6 0.0028 0.00 -0.20 0.00 0.13
7 0.0192 0.00 0.30 0.00 0.33
8 0.0192 0.00 0.10 0.00 0.24
9 0.0192 0.00 -0.10 0.00 0.15
10 0.0219 0.00 -0.18 0.00 -0.19
11 0.0219 0.00 -0.02 0.00 0.04
12 0.0219 0.00 -0.00 0.00 -0.13
13 0.0958 0.00 -0.20 0.00 -0.47
14 0.0959 0.00 0.12 0.00 -0.32
15 0.0986 0.00 -0.02 0.00 -0.27
16 0.1584 0.00 0.01 0.00 -0.38
17 0.1589 0.00 -0.07 0.00 0.16
18 0.1616 0.00 0.36 0.00 -0.37
19 0.2643 0.00 -0.02 0.00 -0.28
20 0.2647 0.00 -0.37 0.00 -0.22
21 0.9612 0.00 -0.18 0.00 -0.23
22 0.9614 0.00 -0.02 0.00 -0.14
23 0.9745 0.00 0.37 0.00 0.35
24 0.9747 0.00 0.33 0.00 0.30
25 0.9772 0.00 0.82 0.00 0.23
26 0.9773 0.00 0.29 0.00 0.69
27 3.0854 0.00 0.05 0.00 0.11
28 3.0856 0.00 -0.08 0.00 0.09
29 5.1767 0.00 -0.07 0.00 -0.10
30 5.1767 0.00 -0.15 0.00 -0.12
31 5.1767 0.00 -0.09 0.00 -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.
01FU172 quality flag:3 Type: 3:2E 3:2E 3:2E Type: 6:4II 6:4II 6:4II axisobj 39.130 39.130 39.130 ecceobj 0.265 0.265 0.265 incobj 24.796 24.796 24.796 qmin 25.870 25.869 25.871 qmax 53.604 53.609 53.599 amean 39.454 39.454 39.454 amin 39.083 39.084 39.082 amax 39.936 39.938 39.933 emean 0.264 0.264 0.264 emin 0.171 0.171 0.171 emax 0.344 0.344 0.344 imean 24.117 24.117 24.117 imin 21.213 21.212 21.213 imax 26.796 26.797 26.796 excite_mean 0.490 0.490 0.490 fracstop 1.000 1.000 1.000 cjmean 2.774 2.774 2.774 libcent 0 180.7 180.6 180.7 libamp 0 45.9 45.7 46.0 libcent 1 179.9 179.4 179.9 libamp 1 170.0 169.4 171.0 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 87.7 87.7 87.7 kozaiamp 56.4 56.4 56.4