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: 20BF12 # Created Fri Nov 22 02:11:03 2024 # Orbit generated from Bernstein formalism # Fitting 32 observations of 32 # Arc: 4.42y # First observation: 2019/12/04 # Last observation: 2024/05/04 Preliminary a, adot, b, bdot, g, gdot: -0.318795 1.931504 0.054988 -0.144694 0.553985 0.000000 # WARNING MRQMIN stopped after 13 iterations -- oscilliatory solution # WARNING Fitting with energy constraint # WARNING MRQMIN stopped after 13 iterations -- oscilliatory solution # WARNING MRQMIN stopped after 13 iterations -- oscilliatory solution # Chi-squared of fit: 9999.99 DOF: 59 RMS: 99.99 # Min/Max residuals: -9999.99 9999.99 # Exact a, adot, b, bdot, g, gdot: -9.825853E-01 1.945725E+00 4.793376E-02 -1.468113E-01 -1.595391E-01 1.289767E-01 # Covariance matrix: 3.2448E-13 -3.1359E-13 2.3955E-15 2.1026E-14 2.5678E-13 -8.7451E-14 -3.1359E-13 4.5121E-13 1.3087E-15 -3.1520E-14 -2.4815E-13 1.0223E-13 2.3955E-15 1.3087E-15 7.5446E-14 -2.4315E-14 4.6940E-15 -8.0950E-16 2.1026E-14 -3.1520E-14 -2.4315E-14 2.5659E-14 1.7794E-14 -7.4311E-15 2.5678E-13 -2.4815E-13 4.6940E-15 1.7794E-14 2.9177E-13 -8.9717E-14 -8.7451E-14 1.0223E-13 -8.0950E-16 -7.4311E-15 -8.9717E-14 3.0689E-14 # lat0 lon0 xBary yBary zBary JD0 -5.870896 122.293425 0.762018 -0.064886 -0.631284 2458821.990237 # Heliocentric elements and errors Epoch: 2458820.5000 = 2019/12/03 Mean Anomaly: 353.65386 +/- 0.009 Argument of Peri: 58.64970 +/- 0.000 Long of Asc Node: 241.68016 +/- 0.000 Inclination: 8.59142 +/- 0.000 Eccentricity: 22.05653181 +/- 0.0002 Semi-Major Axis: -0.28155690 +/- 0.0000 Time of Perihelion: 2460636.0493 +/- 2.6 Perihelion: 5.92861188 +/- 0.0001 Aphelion: -6.49172568 +/- 0.0001 Period (y) 281.9752 +/- 0.00 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -1.54998758 +/- 0.0000 Ecliptic Y -7.65107144 +/- 0.0000 Ecliptic Z 0.34222346 +/- 0.0000 Ecliptic XDOT 0.02927288 +/- 0.0000 Ecliptic YDOT 0.01619745 +/- 0.0000 Ecliptic ZDOT 0.00273238 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 7.81399210 +/- 0.0000 Geocenter to KBO 8.79265687 +/- 0.0000 # Hcoef: NaN
The following table shows the complete astrometric record for 20BF12. 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 (20BF12) followed by the observatory code and reference code for the source of the astrometry.
2019 12 04.489436 08 12 47.667 +13 55 27.51 22.1G 20BF12 F51 C~3d4U 2019 12 04.501757 08 12 47.555 +13 55 27.01 22.3G 20BF12 F51 C~3d4U 2019 12 04.514120 08 12 47.443 +13 55 26.63 22.5G 20BF12 F51 C~3d4U 2019 12 04.526357 08 12 47.311 +13 55 26.25 22.5G 20BF12 F51 C~3d4U 2020 01 17.377041 07 59 21.927 +14 02 08.24 21.8G 20BF12 F51 C~3d4U 2020 01 21.375985 07 57 46.657 +14 05 20.62 20.1G 20BF12 F52 C~3d4U 2020 01 22.495535 07 57 19.984 +14 06 17.66 21.9G 20BF12 F52 C~3d4U 2020 01 22.507479 07 57 19.701 +14 06 18.41 22.1G 20BF12 F52 C~3d4U 2020 01 25.499858 07 56 08.953 +14 08 56.30 22.0w 20BF12 F51 C~3d4U 2020 01 25.513295 07 56 08.618 +14 08 56.97 22.0w 20BF12 F51 C~3d4U 2020 01 25.526676 07 56 08.323 +14 08 57.63 22.0w 20BF12 F51 C~3d4U 2020 01 26.17511 07 55 53.17 +14 09 32.6 22.3R 20BF12 691 C~3d4U 2020 01 26.18967 07 55 52.82 +14 09 33.2 21.9R 20BF12 691 C~3d4U 2020 01 26.20420 07 55 52.49 +14 09 34.0 21.8R 20BF12 691 C~3d4U 2020 01 28.32402 07 55 03.09 +14 11 30.8 21.4R 20BF12 291 C~3d4U 2020 01 28.33700 07 55 02.78 +14 11 32.2 20BF12 291 C~3d4U 2020 01 28.35000 07 55 02.46 +14 11 32.9 20BF12 291 C~3d4U 2020 01 29.32640 07 54 39.96 +14 12 28.0 20BF12 691 C~3d4U 2020 01 29.35270 07 54 39.27 +14 12 29.0 21.4R 20BF12 691 C~3d4U 2020 01 29.37900 07 54 38.70 +14 12 31.0 21.4R 20BF12 691 C~3d4U 2020 12 09.428020 09 50 37.542 +05 30 02.69 22.3G 20BF12 G37 C~4URS 2020 12 09.479120 09 50 37.564 +05 29 58.56 20BF12 G37 C~4URS 2021 02 13.326970 09 35 37.27 +05 53 05.9 21.6G 20BF12 V00 C~4Zgd 2021 02 13.331749 09 35 37.18 +05 53 07.1 21.1G 20BF12 V00 C~4Zgd 2021 02 13.336506 09 35 37.08 +05 53 07.3 20.9G 20BF12 V00 C~4Zgd 2021 02 13.341272 09 35 36.93 +05 53 07.5 21.6G 20BF12 V00 C~4Zgd 2022 03 02.260390 11 08 08.361 -03 05 06.57 22.1G 20BF12 G37 C~5SJB 2022 03 02.316950 11 08 07.166 -03 04 58.77 20BF12 G37 C~5SJB 2022 03 02.369550 11 08 06.067 -03 04 52.27 20BF12 G37 C~5SJB 2024 05 04.269970 13 30 06.733 -14 43 39.43 22.8G 20BF12 G37 C~82nf 2024 05 04.304010 13 30 06.140 -14 43 35.10 20BF12 G37 C~82nf 2024 05 04.336050 13 30 05.563 -14 43 30.84 20BF12 G37 C~82nf
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 0.00202732.21 0.00 -9891.44
2 0.0000 -1.48202706.32 -0.84 -9891.52
3 0.0001 -2.99202680.32 -1.57 -9891.48
4 0.0001 -4.78202654.30 -2.36 -9891.52
5 0.1202 -11558.76112315.50 -2097.51 -9040.13
6 0.1311 -12960.10104418.33 -2192.97 -8828.21
7 0.1342 -13353.26102223.71 -2216.16 -8763.86
8 0.1342 -13357.46102200.28 -2216.26 -8763.05
9 0.1424 -14402.04 96380.43 -2270.39 -8578.77
10 0.1424 -14406.97 96354.12 -2270.72 -8578.05
11 0.1425 -14411.33 96328.48 -2270.94 -8577.22
12 0.1442 -14635.37 95078.77 -2281.22 -8535.06
13 0.1443 -14640.50 95050.49 -2281.66 -8534.32
14 0.1443 -14645.39 95022.50 -2281.85 -8533.33
15 0.1501 -15376.55 90949.98 -2312.21 -8390.57
16 0.1502 -15381.28 90924.80 -2311.74 -8389.06
17 0.1502 -15386.00 90899.60 -2311.99 -8388.27
18 0.1529 -15719.51 89036.68 -2323.74 -8319.14
19 0.1529 -15729.60 88985.32 -2324.77 -8318.05
20 0.1530 -15738.17 88935.51 -2324.47 -8315.62
21 1.0156 98156.19-97256.44 -7251.85 11685.50
22 1.0157 98158.08-97308.48 -7256.14 11681.24
23 1.1960 82350.29********* -9862.65 12603.13
24 1.1960 82348.40********* -9861.80 12604.51
25 1.1960 82346.67********* -9862.03 12604.81
26 1.1960 82344.12********* -9862.48 12604.89
27 2.2417 217700.59********* -20642.46 31131.99
28 2.2418 217659.37********* -20638.01 31147.17
29 2.2420 217621.92********* -20634.87 31160.32
30 4.41561814388.99 4582.83 -136828.64 19.48
31 4.41561813646.06 3612.14 -136757.07 110.58
32 4.41571812922.74 2674.55 -136687.02 199.03
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.
20BF12 quality flag:3 Type: CENTAURR CENTAURR CENTAURR axisobj 10.438 10.438 10.438 ecceobj 0.352 0.352 0.352 incobj 6.999 6.999 6.999 qmin 6.767 6.767 6.767 qmax 14.110 14.110 14.110 amean 10.438 10.438 10.438 amin 10.438 10.438 10.438 amax 10.438 10.438 10.438 emean 0.352 0.352 0.352 emin 0.352 0.352 0.352 emax 0.352 0.352 0.352 imean 8.261 8.261 8.261 imin 8.261 8.261 8.261 imax 8.261 8.261 8.261 excite_mean 0.380 0.380 0.380 fracstop 0.000 0.000 0.000 cjmean 3.976 3.976 3.976 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 244.9 244.9 244.9 kozaiamp 0.0 0.0 0.0