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: 97QH4 # Created Wed Dec 25 02:07:52 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 30 observations of 30 # Arc: 17.08y # First observation: 1997/08/27 # Last observation: 2014/09/27 # Chi-squared of fit: 131.16 DOF: 54 RMS: 0.37 # Min/Max residuals: -0.93 1.00 # Exact a, adot, b, bdot, g, gdot: 1.432894E-05 2.377793E-02 2.145692E-06 5.567508E-03 2.469513E-02 -1.689143E-03 # Covariance matrix: 8.1686E-14 -2.5333E-14 3.9530E-15 -4.9706E-15 2.3661E-14 -4.8957E-14 -2.5333E-14 3.2338E-14 -5.6024E-15 7.1446E-15 2.2576E-14 7.0552E-14 3.9530E-15 -5.6024E-15 6.2312E-14 -6.7385E-15 -2.8873E-15 -1.3199E-14 -4.9706E-15 7.1446E-15 -6.7385E-15 3.9196E-15 4.0584E-15 1.6811E-14 2.3661E-14 2.2576E-14 -2.8873E-15 4.0584E-15 2.2283E-13 4.0751E-14 -4.8957E-14 7.0552E-14 -1.3199E-14 1.6811E-14 4.0751E-14 1.6596E-13 # lat0 lon0 xBary yBary zBary JD0 -0.062123 -4.020474 0.369618 -0.001206 -0.930917 2450687.988791 # Heliocentric elements and errors Epoch: 2450688.5000 = 1997/08/28 Mean Anomaly: 300.20833 +/- 0.029 Argument of Peri: 68.32890 +/- 0.035 Long of Asc Node: 355.72304 +/- 0.000 Inclination: 13.14601 +/- 0.000 Eccentricity: 0.08450006 +/- 0.0000 Semi-Major Axis: 43.01913367 +/- 0.0033 Time of Perihelion: 2467805.5566 +/- 13.0 Perihelion: 39.38401425 +/- 0.0033 Aphelion: 46.65425309 +/- 0.0038 Period (y) 282.1634 +/- 0.03 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 41.30437163 +/- 0.0008 Ecliptic Y -3.27706546 +/- 0.0001 Ecliptic Z -0.04380340 +/- 0.0000 Ecliptic XDOT 0.00000320 +/- 0.0000 Ecliptic YDOT 0.00265024 +/- 0.0000 Ecliptic ZDOT 0.00061731 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 41.43423938 +/- 0.0008 Geocenter to KBO 40.49389987 +/- 0.0008 # Hcoef: 7.10
The following table shows the complete astrometric record for 97QH4. 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 (97QH4) followed by the observatory code and reference code for the source of the astrometry.
1997 08 27.48806 23 45 20.40 -01 39 18.6 22.5R 97QH4 568 C30562 1997 08 27.54196 23 45 20.12 -01 39 20.0 97QH4 568 C30562 1997 08 27.57699 23 45 20.01 -01 39 21.2 97QH4 568 C30562 1997 08 28.46564 23 45 16.22 -01 39 42.5 97QH4 568 C30562 1997 08 28.52310 23 45 15.95 -01 39 43.9 97QH4 568 C30562 1997 08 28.57356 23 45 15.73 -01 39 45.1 97QH4 568 C30562 1997 09 01.37881 23 44 59.42 -01 41 18.6 97QH4 568 C30562 1997 09 01.43322 23 44 59.15 -01 41 20.1 97QH4 568 C30562 1997 09 01.48345 23 44 58.93 -01 41 21.2 97QH4 568 C30562 1997 09 23.26736 23 43 19.95 -01 50 47.8 97QH4 568 Ca0017 1997 09 23.29155 23 43 19.87 -01 50 48.8 97QH4 568 Ca0017 1997 09 23.37704 23 43 19.46 -01 50 50.8 97QH4 568 Ca0017 1997 09 24.29769 23 43 15.24 -01 51 15.0 97QH4 568 Ca0017 1997 09 24.34213 23 43 15.00 -01 51 16.4 97QH4 568 Ca0017 1997 10 05.17260 23 42 26.46 -01 55 54.4 97QH4 675 Ca0017 1997 10 05.23823 23 42 26.16 -01 55 56.2 23.0R 97QH4 675 Ca0017 1997 10 05.30509 23 42 25.86 -01 55 57.8 97QH4 675 Ca0017 1998 06 29.53722 23 52 14.06 -00 37 18.8 97QH4 568 Ca1697 1998 06 30.57255 23 52 13.86 -00 37 16.2 97QH4 568 Ca1697 1998 07 01.51000 23 52 13.62 -00 37 14.2 97QH4 568 Ca1697 2000 08 08.32651 00 00 05.27 +00 58 01.3 23.0R 97QH4 809 Cc2106 2000 08 08.37515 00 00 05.10 +00 58 00.4 23.1R 97QH4 809 Cc2106 2000 08 08.40854 00 00 05.00 +00 57 59.9 23.2R 97QH4 809 Cc2106 2000 08 27.32153 23 58 56.23 +00 51 53.2 22.4R 97QH4 807 Cc0673 2000 08 27.39603 23 58 55.93 +00 51 51.8 97QH4 807 Cc0673 2001 11 18.196678 23 57 58.46 +01 10 44.2 97QH4 645 C~1cF1 2001 11 18.197507 23 57 58.45 +01 10 44.2 97QH4 645 C~1cF1 2001 11 18.199995 23 57 58.45 +01 10 44.2 97QH4 645 C~1cF1 2014 09 27.41910 01 03 04.00 +12 34 50.7 23.2R 97QH4 695 C~1LJ1 2014 09 27.47242 01 03 03.75 +12 34 49.2 97QH4 695 C~1LJ1
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 0.05 0.00 0.34
2 0.0001 0.00 -0.67 0.00 0.23
3 0.0002 0.00 -0.06 0.00 -0.13
4 0.0027 0.00 -0.60 0.00 -0.04
5 0.0028 0.00 -0.91 0.00 -0.05
6 0.0030 0.00 -0.93 0.00 -0.03
7 0.0134 0.00 0.44 0.00 -0.01
8 0.0135 0.00 0.02 0.00 -0.15
9 0.0137 0.00 0.07 0.00 -0.00
10 0.0733 0.00 -0.39 0.00 0.32
11 0.0734 0.00 0.09 0.00 -0.04
12 0.0736 0.00 -0.08 0.00 0.21
13 0.0761 0.00 -0.20 0.00 0.17
14 0.0763 0.00 -0.70 0.00 -0.06
15 0.1059 0.00 1.00 0.00 -0.11
16 0.1061 0.00 0.87 0.00 -0.27
17 0.1063 0.00 0.83 0.00 -0.21
18 0.8379 0.00 0.61 0.00 -0.36
19 0.8408 0.00 0.52 0.00 -0.34
20 0.8433 0.00 0.65 0.00 -0.17
21 2.9482 0.00 -0.06 0.00 0.23
22 2.9484 0.00 -0.29 0.00 0.10
23 2.9484 0.00 -0.20 0.00 0.12
24 3.0002 0.00 -0.06 0.00 -0.05
25 3.0004 0.00 0.09 0.00 0.24
26 4.2264 0.00 -0.05 0.00 -0.01
27 4.2264 0.00 -0.18 0.00 -0.00
28 4.2265 0.00 -0.09 0.00 0.03
29 17.0840 0.00 -0.01 0.00 0.09
30 17.0841 0.00 0.08 0.00 -0.16
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.
97QH4 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.028 43.028 43.028 ecceobj 0.088 0.088 0.088 incobj 13.155 13.155 13.155 qmin 38.418 38.417 38.419 qmax 47.281 47.250 47.291 amean 42.751 42.751 42.751 amin 42.419 42.419 42.413 amax 43.106 43.112 43.104 emean 0.082 0.082 0.082 emin 0.068 0.068 0.068 emax 0.098 0.098 0.098 imean 13.418 13.418 13.418 imin 12.700 12.701 12.700 imax 14.065 14.065 14.065 excite_mean 0.246 0.246 0.246 fracstop 1.000 1.000 1.000 cjmean 3.014 3.014 3.014 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 180.0 180.1 180.2 kozaiamp 180.0 180.0 180.0