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: 99DA
# Created Thu Apr 25 01:09:49 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 48 observations of 48
# Arc: 25.07y
# First observation: 1999/02/16
# Last observation: 2024/03/13
# Chi-squared of fit: 202.09 DOF: 90 RMS: 0.36
# Min/Max residuals: -0.77 0.80
# Exact a, adot, b, bdot, g, gdot:
1.573045E-05 1.968160E-02 -7.721723E-07 6.989968E-05 2.207910E-02 -3.938931E-04
# Covariance matrix:
8.0235E-14 3.9979E-16 1.0419E-15 5.2210E-17 1.1402E-13 1.3692E-15
3.9979E-16 6.9289E-15 2.2935E-16 2.9942E-17 2.7613E-14 1.4332E-14
1.0419E-15 2.2935E-16 4.4813E-14 -2.6253E-15 3.7543E-15 3.6133E-16
5.2210E-17 2.9942E-17 -2.6253E-15 4.5547E-16 2.4120E-16 6.0302E-17
1.1402E-13 2.7613E-14 3.7543E-15 2.4120E-16 4.1807E-13 4.5292E-14
1.3692E-15 1.4332E-14 3.6133E-16 6.0302E-17 4.5292E-14 3.2564E-14
# lat0 lon0 xBary yBary zBary JD0
2.844376 139.848876 -0.132001 0.048709 -0.984853 2451225.833693
# Heliocentric elements and errors
Epoch: 2451226.5000 = 1999/02/17
Mean Anomaly: 191.97937 +/- 0.030
Argument of Peri: 255.79910 +/- 0.015
Long of Asc Node: 53.85078 +/- 0.001
Inclination: 2.79038 +/- 0.000
Eccentricity: 0.07413251 +/- 0.0001
Semi-Major Axis: 43.13333634 +/- 0.0043
Time of Perihelion: 2499518.8253 +/- 12.1
Perihelion: 39.93575382 +/- 0.0052
Aphelion: 46.33091886 +/- 0.0057
Period (y) 283.2877 +/- 0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -35.40688425 +/- 0.0010
Ecliptic Y 29.70287810 +/- 0.0009
Ecliptic Z 2.24749144 +/- 0.0001
Ecliptic XDOT -0.00153783 +/- 0.0000
Ecliptic YDOT -0.00188817 +/- 0.0000
Ecliptic ZDOT 0.00000624 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 46.27051418 +/- 0.0009
Geocenter to KBO 45.29175376 +/- 0.0013
# Hcoef: 7.81
The following table shows the complete astrometric record for 99DA. 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 (99DA) followed by the observatory code and reference code for the source of the astrometry.
1999 02 16.33295 09 32 47.65 +17 33 35.4 24.3R 99DA 568 Ca4507 1999 02 16.37498 09 32 47.48 +17 33 36.0 24.1R 99DA 568 Ca4013 1999 02 16.38828 09 32 47.40 +17 33 36.6 99DA 568 Ca4507 1999 02 16.41302 09 32 47.31 +17 33 36.8 24.2R 99DA 568 Ca4013 1999 02 16.42551 09 32 47.23 +17 33 37.1 99DA 568 Ca4013 1999 02 16.42622 09 32 47.22 +17 33 37.4 99DA 568 Ca4507 1999 02 16.45233 09 32 47.12 +17 33 37.7 24.1R 99DA 568 Ca4013 1999 02 16.45887 09 32 47.08 +17 33 38.1 99DA 568 Ca4507 1999 02 16.48792 09 32 46.95 +17 33 38.5 24.1R 99DA 568 Ca4013 1999 02 17.31904 09 32 43.26 +17 33 56.3 99DA 568 Ca4013 1999 02 17.35801 09 32 43.05 +17 33 56.8 99DA 568 Ca4013 1999 02 17.39170 09 32 42.94 +17 33 57.5 99DA 568 Ca4013 1999 02 17.40529 09 32 42.86 +17 33 58.2 99DA 568 Ca4013 1999 03 23.25284 09 30 28.43 +17 43 45.4 24.0R 99DA 568 Ca4209 1999 03 23.25958 09 30 28.39 +17 43 45.6 99DA 568 Ca4209 1999 03 23.27248 09 30 28.35 +17 43 45.7 99DA 568 Ca4209 1999 03 23.33771 09 30 28.16 +17 43 46.6 99DA 568 Ca4209 1999 03 23.35067 09 30 28.11 +17 43 46.7 99DA 568 Ca4209 1999 05 09.98889 09 29 21.33 +17 46 19.4 24.4R 99DA 807 Ca6741 1999 05 10.99861 09 29 21.87 +17 46 12.8 24.5R 99DA 807 Ca6741 2000 03 30.26309 09 34 32.69 +17 24 02.9 99DA 568 Cc6423 2000 03 30.27631 09 34 32.66 +17 24 03.1 99DA 568 Cc6423 2000 03 30.28290 09 34 32.67 +17 24 03.3 99DA 568 Cc6423 2000 03 30.29589 09 34 32.64 +17 24 03.3 99DA 568 Cc6423 2000 03 30.31016 09 34 32.59 +17 24 03.4 99DA 568 Cc6423 2000 03 30.31661 09 34 32.55 +17 24 03.8 99DA 568 Cc6423 2000 03 30.32306 09 34 32.54 +17 24 03.7 99DA 568 Cc6423 2000 03 30.32958 09 34 32.52 +17 24 03.7 24.3R 99DA 568 Cc6423 2000 03 30.33607 09 34 32.50 +17 24 03.7 24.1R 99DA 568 Cc6423 2001 02 23.16458 09 41 11.76 +16 52 45.5 24.1R 99DA 309 Cc6423 2001 02 23.17162 09 41 11.72 +16 52 45.9 23.9R 99DA 309 Cc6423 2001 02 24.13751 09 41 07.49 +16 53 06.0 99DA 309 Cc6423 2001 02 24.16626 09 41 07.37 +16 53 07.0 24. R 99DA 309 Cc7487 2001 02 24.19459 09 41 07.26 +16 53 07.5 99DA 309 Cc7487 2001 02 24.21656 09 41 07.14 +16 53 07.6 99DA 309 Cc6423 2015 03 23.15082 10 40 38.95 +11 21 00.1 23.9R 99DA 695 C~1Q39 2015 03 23.15697 10 40 38.90 +11 21 00.2 99DA 695 C~1Q39 2015 03 23.21731 10 40 38.67 +11 21 01.7 99DA 695 C~1Q39 2015 03 23.22247 10 40 38.64 +11 21 01.7 99DA 695 C~1Q39 2015 03 23.27719 10 40 38.43 +11 21 03.0 99DA 695 C~1Q39 2015 03 23.28187 10 40 38.41 +11 21 03.1 99DA 695 C~1Q39 2015 04 15.19942 10 39 21.05 +11 27 45.2 24.0R 99DA 695 C~1RHL 2015 04 15.27604 10 39 20.83 +11 27 46.5 99DA 695 C~1RHL 2015 04 15.34908 10 39 20.64 +11 27 47.5 99DA 695 C~1RHL 2015 04 24.18878 10 38 58.93 +11 29 27.4 23.9R 99DA G37 C~1Re8 2015 04 24.29550 10 38 58.71 +11 29 27.5 99DA G37 C~1Re8 2024 03 13.290430 11 19 55.701 +07 08 38.16 24.2G 99DA G37 C~7wJW 2024 03 13.332830 11 19 55.524 +07 08 39.77 99DA G37 C~7wJW
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 -0.28 0.00 0.27
2 0.0001 0.00 0.05 0.00 -0.03
3 0.0002 0.00 -0.24 0.00 0.29
4 0.0002 0.00 0.11 0.00 -0.04
5 0.0003 0.00 -0.23 0.00 -0.00
6 0.0003 0.00 -0.33 0.00 0.28
7 0.0003 0.00 -0.04 0.00 0.03
8 0.0003 0.00 -0.19 0.00 0.29
9 0.0004 0.00 -0.15 0.00 0.08
10 0.0027 0.00 0.28 0.00 0.34
11 0.0028 0.00 -0.20 0.00 0.02
12 0.0029 0.00 0.45 0.00 0.00
13 0.0029 0.00 0.18 0.00 0.42
14 0.0956 0.00 0.67 0.00 0.01
15 0.0956 0.00 0.40 0.00 0.12
16 0.0957 0.00 0.43 0.00 0.06
17 0.0958 0.00 0.77 0.00 0.14
18 0.0959 0.00 0.65 0.00 0.08
19 0.2263 0.00 0.70 0.00 0.61
20 0.2291 0.00 -0.35 0.00 0.80
21 1.1169 0.00 -0.77 0.00 -0.70
22 1.1169 0.00 -0.66 0.00 -0.64
23 1.1169 0.00 -0.23 0.00 -0.50
24 1.1169 0.00 -0.13 0.00 -0.64
25 1.1170 0.00 -0.27 0.00 -0.69
26 1.1170 0.00 -0.60 0.00 -0.35
27 1.1170 0.00 -0.48 0.00 -0.52
28 1.1170 0.00 -0.50 0.00 -0.58
29 1.1171 0.00 -0.53 0.00 -0.65
30 2.0201 0.00 0.29 0.00 -0.11
31 2.0201 0.00 0.16 0.00 0.14
32 2.0227 0.00 0.11 0.00 0.06
33 2.0228 0.00 0.23 0.00 0.46
34 2.0229 0.00 0.47 0.00 0.37
35 2.0230 0.00 0.14 0.00 0.01
36 16.0953 0.00 0.31 0.00 -0.06
37 16.0953 0.00 -0.08 0.00 -0.09
38 16.0955 0.00 0.06 0.00 0.11
39 16.0955 0.00 -0.08 0.00 0.00
40 16.0957 0.00 0.03 0.00 0.13
41 16.0957 0.00 0.01 0.00 0.13
42 16.1584 0.00 0.18 0.00 -0.13
43 16.1586 0.00 0.12 0.00 0.17
44 16.1588 0.00 0.33 0.00 0.21
45 16.1830 0.00 -0.36 0.00 0.72
46 16.1833 0.00 -0.13 0.00 -0.16
47 25.0704 0.00 -0.17 0.00 -0.50
48 25.0705 0.00 -0.08 0.00 -0.01
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.
99DA quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.240 43.240 43.240 ecceobj 0.071 0.071 0.071 incobj 2.790 2.790 2.790 qmin 39.549 39.548 39.550 qmax 47.371 47.374 47.368 amean 43.332 43.332 43.332 amin 42.998 42.998 42.997 amax 43.695 43.693 43.698 emean 0.066 0.066 0.066 emin 0.046 0.046 0.046 emax 0.085 0.085 0.085 imean 1.286 1.286 1.286 imin 0.127 0.127 0.127 imax 2.280 2.280 2.280 excite_mean 0.071 0.071 0.071 fracstop 1.000 1.000 1.000 cjmean 3.088 3.088 3.088 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 204.0 204.0 204.1 kozaiamp 180.0 180.0 180.0