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: 99CY118
# Created Sat Apr 20 01:09:47 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 37 observations of 37
# Arc: 18.06y
# First observation: 1999/02/10
# Last observation: 2017/03/03
# Chi-squared of fit: 83.14 DOF: 68 RMS: 0.26
# Min/Max residuals: -0.89 0.51
# Exact a, adot, b, bdot, g, gdot:
2.116092E-05 3.548131E-02 9.412518E-06 1.696799E-02 2.929244E-02 -3.491384E-03
# Covariance matrix:
1.0637E-13 -1.7562E-14 7.5069E-15 -6.1798E-15 6.1236E-14 -1.7514E-14
-1.7562E-14 1.0828E-14 -5.8856E-15 4.9244E-15 -1.7240E-15 1.4141E-14
7.5069E-15 -5.8856E-15 6.9160E-14 -7.4126E-15 9.2427E-16 -8.1974E-15
-6.1798E-15 4.9244E-15 -7.4126E-15 3.0622E-15 -5.2425E-16 6.8611E-15
6.1236E-14 -1.7240E-15 9.2427E-16 -5.2425E-16 1.4567E-13 -9.3251E-16
-1.7514E-14 1.4141E-14 -8.1974E-15 6.8611E-15 -9.3251E-16 1.9709E-14
# lat0 lon0 xBary yBary zBary JD0
0.105120 163.963105 0.378824 0.001460 -0.918179 2451219.929933
# Heliocentric elements and errors
Epoch: 2451220.5000 = 1999/02/11
Mean Anomaly: 357.16505 +/- 0.001
Argument of Peri: 14.97225 +/- 0.001
Long of Asc Node: 163.12676 +/- 0.000
Inclination: 25.63945 +/- 0.000
Eccentricity: 0.61139104 +/- 0.0001
Semi-Major Axis: 89.07016243 +/- 0.0154
Time of Perihelion: 2453638.4086 +/- 79.2
Perihelion: 34.61346287 +/- 0.0082
Aphelion: 143.52686199 +/- 0.0255
Period (y) 840.6333 +/- 0.22
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -33.57961609 +/- 0.0004
Ecliptic Y 10.04806849 +/- 0.0001
Ecliptic Z 0.06295718 +/- 0.0000
Ecliptic XDOT -0.00060141 +/- 0.0000
Ecliptic YDOT -0.00326918 +/- 0.0000
Ecliptic ZDOT 0.00158533 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 35.05086579 +/- 0.0004
Geocenter to KBO 34.13859600 +/- 0.0004
# Hcoef: 8.66
The following table shows the complete astrometric record for 99CY118. 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 (99CY118) followed by the observatory code and reference code for the source of the astrometry.
1999 02 10.42919 11 01 04.04 +06 24 21.3 23.7R 99CY118 568 Ca4013 1999 02 10.47084 11 01 03.86 +06 24 23.0 23.7R 99CY118 568 Ca4013 1999 02 12.51626 11 00 54.55 +06 25 41.6 23.7R 99CY118 568 Ca4013 1999 02 12.62000 11 00 54.08 +06 25 46.1 23.7R 99CY118 568 Ca4013 1999 03 16.31767 10 58 18.26 +06 47 22.1 23.7R 99CY118 568 Ca4506 1999 03 16.37706 10 58 17.97 +06 47 24.6 23.7R 99CY118 568 Ca4506 1999 04 12.46594 10 56 20.86 +07 04 03.5 23.8R 99CY118 568 Ca4843 1999 04 13.39699 10 56 17.60 +07 04 32.8 23.8R 99CY118 568 Ca4843 1999 04 13.46932 10 56 17.36 +07 04 35.3 23.8R 99CY118 568 Ca4843 1999 05 06.35630 10 55 19.53 +07 14 17.0 23.9R 99CY118 568 Ca4843 1999 05 06.42368 10 55 19.42 +07 14 18.3 23.9R 99CY118 568 Ca4843 1999 05 07.29317 10 55 18.18 +07 14 34.3 23.9R 99CY118 568 Ca4843 2000 01 01.54824 11 12 05.91 +06 10 53.0 23.8R 99CY118 568 Ca8502 2000 01 01.58737 11 12 05.86 +06 10 53.8 23.7R 99CY118 568 Ca8502 2000 01 01.62923 11 12 05.81 +06 10 54.6 23.6R 99CY118 568 Ca8502 2000 01 02.52541 11 12 04.80 +06 11 12.5 99CY118 568 Ca8502 2000 01 02.56512 11 12 04.74 +06 11 12.8 99CY118 568 Ca8502 2000 01 02.62563 11 12 04.67 +06 11 14.3 99CY118 568 Ca8502 2000 04 06.44618 11 05 44.01 +07 08 18.5 24.1R 99CY118 568 Cb1942 2000 04 06.48453 11 05 43.84 +07 08 19.5 24.1R 99CY118 568 Cb1942 2002 03 14.27024 11 25 57.07 +07 05 09.0 99CY118 696 Cf4341 2002 03 14.30480 11 25 56.92 +07 05 09.7 99CY118 696 Cf4341 2003 04 01.232696 11 33 47.29 +07 22 04.8 99CY118 645 C~1cF1 2003 04 01.233525 11 33 47.28 +07 22 04.8 99CY118 645 C~1cF1 2003 04 01.236013 11 33 47.27 +07 22 04.9 99CY118 645 C~1cF1 2009 02 22.62236 12 32 34.61 +07 10 34.0 24.7g 99CY118 568 C~59cS 2009 02 23.51431 12 32 31.19 +07 11 14.1 24.3g 99CY118 568 C~59cS 2009 02 23.56980 12 32 30.98 +07 11 16.5 24.4g 99CY118 568 C~59cS 2009 02 23.62551 12 32 30.76 +07 11 18.9 24.5g 99CY118 568 C~59cS 2015 02 18.34490 13 26 52.09 +06 57 15.1 23.9R 99CY118 695 C~1M5z 2015 02 18.43833 13 26 51.89 +06 57 19.5 99CY118 695 C~1M5z 2015 02 18.52873 13 26 51.67 +06 57 23.4 99CY118 695 C~1M5z 2016 03 13.26996 13 34 22.31 +07 11 13.3 24.0R 99CY118 G37 C~1pPV 2016 03 13.31877 13 34 22.13 +07 11 15.6 99CY118 G37 C~1pPV 2016 03 13.49156 13 34 21.46 +07 11 23.4 99CY118 G37 C~1pPV 2017 03 03.326123 13 43 37.22 +06 58 56.8 99CY118 W84 C~3i8v 2017 03 03.327402 13 43 37.21 +06 58 56.7 99CY118 W84 C~3i8v
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 -0.40 0.00 0.11
2 0.0001 0.00 -0.23 0.00 0.21
3 0.0057 0.00 -0.18 0.00 -0.42
4 0.0060 0.00 0.07 0.00 0.04
5 0.0928 0.00 0.16 0.00 -0.11
6 0.0929 0.00 0.25 0.00 -0.02
7 0.1671 0.00 0.02 0.00 0.20
8 0.1697 0.00 0.13 0.00 0.01
9 0.1699 0.00 0.39 0.00 0.24
10 0.2325 0.00 0.33 0.00 0.34
11 0.2327 0.00 0.26 0.00 0.37
12 0.2351 0.00 0.32 0.00 0.22
13 0.8901 0.00 0.02 0.00 -0.34
14 0.8902 0.00 -0.03 0.00 -0.29
15 0.8903 0.00 -0.02 0.00 -0.28
16 0.8928 0.00 0.16 0.00 0.34
17 0.8929 0.00 0.03 0.00 -0.15
18 0.8931 0.00 0.17 0.00 0.17
19 1.1527 0.00 -0.71 0.00 0.05
20 1.1528 0.00 -0.89 0.00 -0.27
21 3.0879 0.00 0.09 0.00 0.16
22 3.0880 0.00 0.48 0.00 -0.60
23 4.1364 0.00 -0.06 0.00 -0.08
24 4.1364 0.00 -0.15 0.00 -0.11
25 4.1364 0.00 -0.12 0.00 -0.10
26 10.0348 0.00 0.01 0.00 0.07
27 10.0372 0.00 -0.18 0.00 0.14
28 10.0373 0.00 -0.03 0.00 0.04
29 10.0375 0.00 -0.02 0.00 -0.06
30 16.0217 0.00 0.24 0.00 -0.22
31 16.0219 0.00 0.51 0.00 0.08
32 16.0222 0.00 0.40 0.00 0.03
33 17.0865 0.00 -0.34 0.00 0.14
34 17.0866 0.00 -0.12 0.00 0.20
35 17.0871 0.00 0.22 0.00 0.12
36 18.0586 0.00 -0.30 0.00 -0.05
37 18.0586 0.00 -0.39 0.00 -0.20
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.
99CY118 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 89.471 89.471 89.472 ecceobj 0.613 0.613 0.613 incobj 25.623 25.623 25.623 qmin 32.526 32.233 32.551 qmax 154.306 158.178 153.675 amean 90.963 90.640 90.335 amin 88.599 87.711 87.558 amax 93.877 95.594 93.684 emean 0.626 0.626 0.622 emin 0.607 0.606 0.600 emax 0.644 0.655 0.643 imean 23.842 23.589 24.015 imin 22.757 22.119 22.721 imax 24.893 25.045 25.489 excite_mean 0.745 0.743 0.743 fracstop 1.000 1.000 1.000 cjmean 2.810 2.810 2.811 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 118.7 137.0 134.2 kozaiamp 89.3 123.8 122.3