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: 17BC230 # Created Sun Apr 27 01:11:01 2025 # Orbit generated from Bernstein formalism # Fitting 62 observations of 63 # Arc: 2.26y # First observation: 2016/11/28 # Last observation: 2019/03/03 Preliminary a, adot, b, bdot, g, gdot: 0.000006 0.029526 0.000019 -0.002420 0.027625 0.000000 # Chi-squared of fit: 56.93 DOF: 118 RMS: 0.17 # Min/Max residuals: -0.54 0.43 # Exact a, adot, b, bdot, g, gdot: 1.534455E-05 2.864404E-02 -9.868916E-07 -2.316702E-03 2.691498E-02 -5.129026E-03 # Covariance matrix: 7.8165E-14 -1.6108E-13 1.7058E-15 3.9005E-14 4.6100E-14 -4.2699E-12 -1.6108E-13 4.5479E-12 2.1721E-13 -9.4920E-13 1.4173E-12 1.1898E-10 1.7058E-15 2.1721E-13 4.3903E-14 -8.8323E-14 8.5852E-14 5.7753E-12 3.9005E-14 -9.4920E-13 -8.8323E-14 4.2151E-13 -2.8430E-13 -2.6349E-11 4.6100E-14 1.4173E-12 8.5852E-14 -2.8430E-13 6.2859E-13 3.6847E-11 -4.2699E-12 1.1898E-10 5.7753E-12 -2.6349E-11 3.6847E-11 3.2880E-09 # lat0 lon0 xBary yBary zBary JD0 -9.290199 151.915053 0.988179 -0.012473 -0.077467 2457721.092239 # Heliocentric elements and errors Epoch: 2457720.5000 = 2016/11/28 Mean Anomaly: 311.06348 +/- 0.067 Argument of Peri: 315.23404 +/- 0.203 Long of Asc Node: 268.41535 +/- 0.005 Inclination: 10.47323 +/- 0.000 Eccentricity: 0.23168686 +/- 0.0020 Semi-Major Axis: 42.04451055 +/- 0.0342 Time of Perihelion: 2471256.5810 +/- 8.6 Perihelion: 32.30334975 +/- 0.0870 Aphelion: 51.78567136 +/- 0.0930 Period (y) 272.6291 +/- 0.33 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -31.95695853 +/- 0.0010 Ecliptic Y 18.16649571 +/- 0.0005 Ecliptic Z -5.99803705 +/- 0.0002 Ecliptic XDOT -0.00088155 +/- 0.0000 Ecliptic YDOT -0.00283769 +/- 0.0000 Ecliptic ZDOT -0.00014839 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 37.24574088 +/- 0.0009 Geocenter to KBO 37.15403667 +/- 0.0011 # Hcoef: 9.75
The following table shows the complete astrometric record for 17BC230. 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 (17BC230) followed by the observatory code and reference code for the source of the astrometry.
2016 11 28.59145 10 02 25.44 +02 06 10.7 25.7r 17BC230 T09 C~7uj9 2016 11 28.59529 10 02 25.41 +02 06 10.7 25.8r 17BC230 T09 C~7uj9 2016 11 28.59911 10 02 25.41 +02 06 10.7 25.9r 17BC230 T09 C~7uj9 2016 11 28.60294 10 02 25.44 +02 06 10.7 25.7r 17BC230 T09 C~7uj9 2016 11 28.60679 10 02 25.41 +02 06 10.5 25.7r 17BC230 T09 C~7uj9 2016 11 28.61062 10 02 25.43 +02 06 10.5 26.3r 17BC230 T09 C~7uj9 2016 11 29.54660 10 02 25.43 +02 05 54.1 25.2i 17BC230 T09 C~7uj9 2016 11 29.55428 10 02 25.45 +02 05 53.7 25.8i 17BC230 T09 C~7uj9 2016 11 29.55811 10 02 25.45 +02 05 53.4 25.8i 17BC230 T09 C~7uj9 2016 11 29.56198 10 02 25.44 +02 05 53.1 25.6i 17BC230 T09 C~7uj9 2016 12 25.52138 10 01 50.43 +02 01 42.5 26.4r 17BC230 T09 C~7uj9 2016 12 25.53531 10 01 50.38 +02 01 41.8 26.4r 17BC230 T09 C~7uj9 2016 12 25.57554 10 01 50.26 +02 01 41.3 25.6i 17BC230 T09 C~7uj9 2016 12 25.60159 10 01 50.18 +02 01 41.7 25.7i 17BC230 T09 C~7uj9 2016 12 25.61625 10 01 50.15 +02 01 41.0 25.9i 17BC230 T09 C~7uj9 2017 01 02.50463 10 01 26.86 +02 01 51.8 25.0i 17BC230 T09 C~7uj9 2017 01 02.50845 10 01 26.83 +02 01 51.9 25.4i 17BC230 T09 C~7uj9 2017 01 02.51228 10 01 26.83 +02 01 51.6 25.4i 17BC230 T09 C~7uj9 2017 01 02.58611 10 01 26.58 +02 01 51.9 26.0g 17BC230 T09 C~7uj9 2017 01 21.48947 10 00 11.70 +02 04 54.0 25.4z 17BC230 T09 C~7uj9 2017 01 21.49330 10 00 11.70 +02 04 54.0 25.2z 17BC230 T09 C~7uj9 2017 01 21.51563 10 00 11.57 +02 04 54.2 25.4z 17BC230 T09 C~7uj9 2017 01 21.54162 10 00 11.45 +02 04 54.7 25.2z 17BC230 T09 C~7uj9 2017 01 21.54547 10 00 11.43 +02 04 54.9 24.7z 17BC230 T09 C~7uj9 2017 01 23.35198 10 00 03.18 +02 05 23.1 25.0r 17BC230 T09 C~7uj9 2017 01 23.39955 10 00 02.96 +02 05 23.9 25.9r 17BC230 T09 C~7uj9 2017 01 23.41253 10 00 02.89 +02 05 23.9 24.7r 17BC230 T09 C~7uj9 2017 01 23.41887 10 00 02.86 +02 05 24.1 25.7r 17BC230 T09 C~7uj9 2017 01 23.43372 10 00 02.80 +02 05 24.4 25.3r 17BC230 T09 C~7uj9 2017 01 23.44310 10 00 02.75 +02 05 24.4 25.0r 17BC230 T09 C~7uj9 2017 01 23.45235 10 00 02.73 +02 05 24.6 25.0r 17BC230 T09 C~7uj9 2017 01 23.45653 10 00 02.68 +02 05 24.7 24.5r 17BC230 T09 C~7uj9 2017 01 23.50600 10 00 02.44 +02 05 25.4 25.5i 17BC230 T09 C~7uj9 2017 01 23.53190 10 00 02.33 +02 05 25.9 25.2i 17BC230 T09 C~7uj9 2017 01 23.53459 10 00 02.32 +02 05 25.9 25.5i 17BC230 T09 C~7uj9 2017 01 23.54715 10 00 02.25 +02 05 26.1 25.3i 17BC230 T09 C~7uj9 2017 01 23.56544 10 00 02.20 +02 05 26.6 25.1i 17BC230 T09 C~7uj9 2017 01 23.59562 10 00 02.03 +02 05 27.1 25.2i 17BC230 T09 C~7uj9 2017 01 23.59947 10 00 02.02 +02 05 26.9 25.2i 17BC230 T09 C~7uj9 2017 01 30.39870 09 59 29.44 +02 07 29.3 25.3i 17BC230 T09 C~7uj9 2017 01 30.42076 09 59 29.32 +02 07 29.8 24.7i 17BC230 T09 C~7uj9 2017 01 30.42459 09 59 29.32 +02 07 29.6 24.8i 17BC230 T09 C~7uj9 2017 01 30.44278 09 59 29.22 +02 07 30.1 24.5i 17BC230 T09 C~7uj9 2017 01 30.50920 09 59 28.88 +02 07 31.1 24.8z 17BC230 T09 C~7uj9 2017 01 30.57591 09 59 28.56 +02 07 32.5 24.3z 17BC230 T09 C~7uj9 2017 01 30.59058 09 59 28.47 +02 07 32.7 24.5z 17BC230 T09 C~7uj9 2017 01 30.60170 09 59 28.39 +02 07 33.3 24.2z 17BC230 T09 C~7uj9 2017 02 02.42933 09 59 14.37 +02 08 30.9 25.8r 17BC230 T09 C~7uj9 2017 02 02.43804 09 59 14.33 +02 08 31.1 25.1r 17BC230 T09 C~7uj9 2017 02 02.44397 09 59 14.32 +02 08 31.2 25.1r 17BC230 T09 C~7uj9 2017 02 02.47353 09 59 14.15 +02 08 31.7 25.0r 17BC230 T09 C~7uj9 2017 02 23.32550 09 57 26.55 +02 17 12.0 25.6g 17BC230 T09 C~7uj9 2017 02 23.35667 09 57 26.37 +02 17 12.6 26.0g 17BC230 T09 C~7uj9 2017 02 23.47596 09 57 25.74 +02 17 16.2 25.9r 17BC230 T09 C~7uj9 2017 02 23.48959 09 57 25.67 +02 17 16.7 26.1r 17BC230 T09 C~7uj9 2017 02 23.50705 09 57 25.60 +02 17 17.0 25.2r 17BC230 T09 C~7uj9 2017 03 04.31098 09 56 40.96 +02 21 32.1 25.0z 17BC230 T09 C~7uj9 2017 03 04.33650 09 56 40.84 +02 21 32.8 24.7z 17BC230 T09 C~7uj9 2017 03 04.47080 09 56 40.16 +02 21 36.8 25.1i 17BC230 T09 C~7uj9 2017 03 04.49253 09 56 40.04 +02 21 37.1 25.5i 17BC230 T09 C~7uj9 2018 01 17.461210 10 06 37.59 +01 20 39.1 17BC230 T09 C~83Ep 2018 01 17.545345 10 06 37.24 +01 20 40.2 17BC230 T09 C~83Ep 2019 03 03.317002 10 09 07.55 +00 53 32.8 17BC230 T09 C~83Ep
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 0.31 0.00 -0.08
2 0.0000 -0.42 -0.14 -0.16 -0.17
3 0.0000 -0.42 -0.16 -0.16 -0.10
4 0.0000 0.00 0.23 0.00 0.12
5 0.0000 -0.35 -0.14 -0.35 -0.16
6 0.0001 -0.07 0.12 -0.24 0.01
7 0.0026 5.69 -0.39 -15.60 0.43
8 0.0026 6.11 -0.01 -15.86 0.29
9 0.0026 6.22 0.08 -16.15 0.08
10 0.0027 6.18 0.03 -16.48 -0.19
11 0.0737 -397.22 ( 0.01) -435.40 ( 0.89)
12 0.0738 -397.68 0.07 -436.32 0.18
13 0.0739 -399.18 0.07 -437.42 -0.29
14 0.0739 -400.45 -0.22 -437.47 0.06
15 0.0740 -400.62 0.16 -438.28 -0.53
16 0.0956 -731.33 0.01 -550.73 0.16
17 0.0956 -731.78 -0.26 -550.80 0.15
18 0.0956 -731.68 0.03 -551.08 -0.08
19 0.0958 -735.29 0.02 -552.11 -0.06
20 0.1476 -1850.34 -0.13 -775.53 0.02
21 0.1476 -1850.34 0.14 -775.53 0.06
22 0.1476 -1852.23 -0.18 -776.03 -0.21
23 0.1477 -1854.09 -0.21 -776.19 -0.11
24 0.1477 -1854.45 -0.29 -776.11 0.01
25 0.1527 -1980.16 0.05 -793.09 0.14
26 0.1528 -1983.53 0.09 -793.50 0.19
27 0.1528 -1984.51 0.04 -793.87 -0.05
28 0.1528 -1985.00 0.01 -793.84 0.04
29 0.1529 -1985.95 0.13 -793.87 0.15
30 0.1529 -1986.65 0.10 -794.14 -0.03
31 0.1529 -1987.00 0.42 -794.06 0.15
32 0.1530 -1987.74 -0.02 -794.23 0.02
33 0.1531 -1991.35 -0.07 -794.83 -0.11
34 0.1532 -1993.07 0.08 -794.94 0.04
35 0.1532 -1993.21 0.14 -794.99 0.01
36 0.1532 -1994.27 -0.01 -795.18 -0.05
37 0.1532 -1995.14 0.43 -794.97 0.33
38 0.1533 -1997.71 0.04 -795.40 0.20
39 0.1533 -1997.78 0.25 -795.64 -0.00
40 0.1720 -2498.11 -0.09 -852.34 0.13
41 0.1720 -2499.97 -0.25 -852.50 0.14
42 0.1720 -2499.90 0.11 -852.69 -0.02
43 0.1721 -2501.48 -0.06 -852.74 0.07
44 0.1723 -2506.61 -0.04 -853.60 -0.25
45 0.1724 -2511.59 0.13 -853.97 -0.09
46 0.1725 -2512.93 -0.07 -854.25 -0.26
47 0.1725 -2514.26 -0.54 -854.11 -0.04
48 0.1803 -2731.30 -0.11 -873.88 0.06
49 0.1803 -2731.94 -0.05 -873.90 0.10
50 0.1803 -2732.11 0.24 -873.86 0.19
51 0.1804 -2734.67 0.02 -874.29 -0.03
52 0.2375 -4428.06 0.06 -952.44 0.08
53 0.2376 -4430.80 -0.07 -952.83 -0.27
54 0.2379 -4440.91 -0.20 -952.76 -0.05
55 0.2379 -4442.06 -0.22 -952.66 0.06
56 0.2380 -4443.15 0.15 -952.75 -0.00
57 0.2621 -5159.57 -0.03 -948.24 -0.03
58 0.2621 -5161.50 0.12 -948.21 -0.03
59 0.2625 -5172.45 0.07 -948.04 -0.03
60 0.2626 -5174.24 0.04 -948.39 -0.41
61 1.1359 4500.13 -0.10 -1228.88 -0.06
62 1.1361 4494.83 0.07 -1229.69 0.09
63 2.2580 7179.81 0.01 -1960.68 0.02
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.
17BC230 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 41.755 41.815 41.699 ecceobj 0.225 0.230 0.220 incobj 10.453 10.452 10.453 qmin 31.545 31.079 31.816 qmax 53.887 54.142 52.440 amean 42.127 41.786 41.809 amin 40.596 40.671 41.004 amax 43.111 43.049 42.453 emean 0.208 0.221 0.198 emin 0.180 0.187 0.160 emax 0.250 0.258 0.235 imean 16.180 16.645 14.675 imin 11.601 11.669 11.921 imax 18.183 19.601 17.286 excite_mean 0.348 0.363 0.322 fracstop 1.000 1.000 1.000 cjmean 2.937 2.922 2.955 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 178.3 186.3 183.8 kozaiamp 180.0 180.0 180.0