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: 16OT17
# Created Mon Jul 7 01:11:10 2025
# Orbit generated from Bernstein formalism
# Fitting 27 observations of 27
# Arc: 1.05y
# First observation: 2015/07/15
# Last observation: 2016/08/01
Preliminary a, adot, b, bdot, g, gdot:
-0.000075 0.039513 0.000005 -0.003720 0.027717 0.000000
# Chi-squared of fit: 11.65 DOF: 48 RMS: 0.12
# Min/Max residuals: -0.25 0.24
# Exact a, adot, b, bdot, g, gdot:
2.154013E-05 3.937375E-02 -2.429247E-06 -3.705381E-03 2.917593E-02 -2.212034E-03
# Covariance matrix:
4.8368E-13 3.0065E-11 -2.1109E-15 -2.8976E-12 1.4007E-11 7.7886E-10
3.0065E-11 3.5164E-09 -1.7695E-13 -3.3653E-10 1.5995E-09 9.0443E-08
-2.1109E-15 -1.7695E-13 2.1400E-13 -1.9722E-13 -9.5711E-14 -4.5539E-12
-2.8976E-12 -3.3653E-10 -1.9722E-13 3.2497E-11 -1.5308E-10 -8.6563E-09
1.4007E-11 1.5995E-09 -9.5711E-14 -1.5308E-10 7.3368E-10 4.1144E-08
7.7886E-10 9.0443E-08 -4.5539E-12 -8.6563E-09 4.1144E-08 2.3264E-06
# lat0 lon0 xBary yBary zBary JD0
2.588796 -8.944219 0.865808 0.024251 -0.534085 2457219.077659
# Heliocentric elements and errors
Epoch: 2457210.5000 = 2015/07/07
Mean Anomaly: 357.77945 +/- 1.017
Argument of Peri: 166.51053 +/- 5.687
Long of Asc Node: 195.10394 +/- 0.026
Inclination: 5.90797 +/- 0.006
Eccentricity: 0.62310463 +/- 0.0096
Semi-Major Axis: 91.58825462 +/- 1.6854
Time of Perihelion: 2459185.2676 +/- 903.0
Perihelion: 34.51918955 +/- 1.0878
Aphelion: 148.65731970 +/- 2.8746
Period (y) 876.5322 +/- 24.19
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 34.21367867 +/- 0.0314
Ecliptic Y -6.26132897 +/- 0.0050
Ecliptic Z 1.54807983 +/- 0.0014
Ecliptic XDOT 0.00038284 +/- 0.0001
Ecliptic YDOT 0.00367339 +/- 0.0000
Ecliptic ZDOT -0.00035667 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 34.81632663 +/- 0.0309
Geocenter to KBO 34.27482975 +/- 0.0318
# Hcoef: 9.67
The following table shows the complete astrometric record for 16OT17. 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 (16OT17) followed by the observatory code and reference code for the source of the astrometry.
2015 07 15.57687 23 23 03.41 -01 09 55.7 24.9r 16OT17 T09 C~8vIA 2015 07 15.59767 23 23 03.36 -01 09 55.9 26.2r 16OT17 T09 C~8vIA 2015 07 22.55368 23 22 47.54 -01 11 24.7 24.2z 16OT17 T09 C~8vIA 2015 07 22.56825 23 22 47.50 -01 11 25.1 25.0z 16OT17 T09 C~8vIA 2015 07 22.58281 23 22 47.46 -01 11 25.3 24.9z 16OT17 T09 C~8vIA 2015 07 22.59732 23 22 47.42 -01 11 25.4 24.6z 16OT17 T09 C~8vIA 2015 07 22.61179 23 22 47.38 -01 11 25.8 24.5z 16OT17 T09 C~8vIA 2016 07 03.57331 23 31 55.17 -00 27 17.2 25.8r 16OT17 T09 C~8vIA 2016 07 03.58369 23 31 55.19 -00 27 17.4 26.0r 16OT17 T09 C~8vIA 2016 07 03.58897 23 31 55.17 -00 27 17.2 25.3r 16OT17 T09 C~8vIA 2016 07 03.59409 23 31 55.17 -00 27 17.4 25.7r 16OT17 T09 C~8vIA 2016 07 03.60455 23 31 55.16 -00 27 17.4 26.0r 16OT17 T09 C~8vIA 2016 07 07.53078 23 31 51.81 -00 27 31.5 26.4g 16OT17 T09 C~8vIA 2016 07 07.54078 23 31 51.80 -00 27 31.5 26.7g 16OT17 T09 C~8vIA 2016 07 07.54583 23 31 51.78 -00 27 31.6 26.2g 16OT17 T09 C~8vIA 2016 07 07.56088 23 31 51.76 -00 27 31.5 26.1g 16OT17 T09 C~8vIA 2016 07 12.55404 23 31 45.31 -00 28 03.9 24.4z 16OT17 T09 C~8vIA 2016 07 12.56833 23 31 45.29 -00 28 04.1 24.5z 16OT17 T09 C~8vIA 2016 07 12.58266 23 31 45.27 -00 28 04.2 24.3z 16OT17 T09 C~8vIA 2016 07 12.59705 23 31 45.24 -00 28 04.2 24.4z 16OT17 T09 C~8vIA 2016 07 29.56202 23 31 06.31 -00 31 51.4 24.3z 16OT17 T09 C~8vIA 2016 07 29.57647 23 31 06.25 -00 31 51.9 24.4z 16OT17 T09 C~8vIA 2016 07 29.59087 23 31 06.21 -00 31 52.1 24.0z 16OT17 T09 C~8vIA 2016 08 01.51133 23 30 57.08 -00 32 48.3 24.5z 16OT17 T09 C~8vIA 2016 08 01.53573 23 30 57.02 -00 32 48.7 25.1z 16OT17 T09 C~8vIA 2016 08 01.55739 23 30 56.95 -00 32 49.0 24.4z 16OT17 T09 C~8vIA 2016 08 01.56009 23 30 56.95 -00 32 49.2 24.9z 16OT17 T09 C~8vIA
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 -0.04 0.00 0.09
2 0.0001 -0.77 -0.13 0.11 0.15
3 0.0191 -253.83 0.11 11.70 0.05
4 0.0191 -254.54 0.03 11.57 -0.11
5 0.0192 -255.17 0.02 11.62 -0.09
6 0.0192 -255.76 0.05 11.76 0.02
7 0.0193 -256.47 -0.04 11.63 -0.14
8 0.9692 8343.64 -0.08 -784.99 0.23
9 0.9692 8343.84 0.24 -785.30 -0.09
10 0.9692 8343.64 0.10 -784.99 0.19
11 0.9692 8343.56 0.08 -785.18 -0.00
12 0.9693 8343.42 0.06 -785.12 0.03
13 0.9800 8291.59 -0.01 -778.30 -0.14
14 0.9801 8291.46 0.02 -778.24 -0.10
15 0.9801 8291.14 -0.20 -778.21 -0.09
16 0.9801 8290.90 -0.17 -778.00 0.09
17 0.9938 8189.05 -0.01 -769.70 0.08
18 0.9938 8188.69 0.00 -769.77 -0.01
19 0.9939 8188.38 0.06 -769.74 -0.02
20 0.9939 8187.96 0.01 -769.56 0.13
21 1.0403 7560.82 0.05 -748.59 0.07
22 1.0404 7559.80 -0.25 -748.70 -0.06
23 1.0404 7559.17 -0.16 -748.65 -0.03
24 1.0484 7410.96 -0.24 -746.41 -0.04
25 1.0485 7409.97 0.09 -746.43 -0.08
26 1.0485 7408.89 0.18 -746.29 0.03
27 1.0486 7408.81 0.24 -746.47 -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.
16OT17 quality flag:2 Type: SCATNEAR 6:1EEEEE SCATNEAR axisobj 93.964 100.606 93.497 ecceobj 0.633 0.658 0.632 incobj 5.889 5.871 5.892 qmin 33.455 33.602 33.466 qmax 168.106 171.771 159.546 amean 94.939 99.419 91.294 amin 88.258 97.075 87.800 amax 101.212 103.130 96.978 emean 0.636 0.652 0.623 emin 0.606 0.642 0.605 emax 0.661 0.666 0.645 imean 5.917 6.463 5.251 imin 5.102 6.008 4.537 imax 6.686 6.743 6.290 excite_mean 0.645 0.662 0.630 fracstop 1.000 1.000 1.000 cjmean 3.041 3.039 3.042 libcent 0 -180.0 181.0 -180.0 libamp 0 -180.0 175.4 -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 199.1 246.0 194.4 kozaiamp 180.0 180.0 180.0