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: 19EH7
# Created Sun Dec 22 02:11:05 2024
# Orbit generated from Bernstein formalism
# Fitting 24 observations of 24
# Arc: 1.96y
# First observation: 2017/03/24
# Last observation: 2019/03/08
Preliminary a, adot, b, bdot, g, gdot:
0.000037 0.018072 0.000041 0.010097 0.021764 0.000000
# Chi-squared of fit: 11.41 DOF: 42 RMS: 0.12
# Min/Max residuals: -0.27 0.30
# Exact a, adot, b, bdot, g, gdot:
1.296112E-05 1.824660E-02 7.515098E-06 1.021193E-02 2.204825E-02 4.486817E-03
# Covariance matrix:
1.2589E-12 -1.7064E-12 3.4989E-13 -6.9186E-13 -7.3404E-13 -2.7118E-11
-1.7064E-12 3.1144E-12 -7.9466E-13 1.5745E-12 2.2107E-12 6.1707E-11
3.4989E-13 -7.9466E-13 7.4650E-13 -7.7576E-13 -7.4451E-13 -1.8006E-11
-6.9186E-13 1.5745E-12 -7.7576E-13 1.1325E-12 1.4811E-12 3.5722E-11
-7.3404E-13 2.2107E-12 -7.4451E-13 1.4811E-12 3.1024E-12 5.8035E-11
-2.7118E-11 6.1707E-11 -1.8006E-11 3.5722E-11 5.8035E-11 1.3999E-09
# lat0 lon0 xBary yBary zBary JD0
1.685836 173.406949 -0.170183 0.028962 -0.978553 2457836.712690
# Heliocentric elements and errors
Epoch: 2457830.5000 = 2017/03/18
Mean Anomaly: 50.72544 +/- 0.068
Argument of Peri: 287.79932 +/- 0.128
Long of Asc Node: 170.67293 +/- 0.000
Inclination: 29.23442 +/- 0.001
Eccentricity: 0.23574994 +/- 0.0018
Semi-Major Axis: 51.94350231 +/- 0.0426
Time of Perihelion: 2438563.3004 +/- 10.1
Perihelion: 39.69782451 +/- 0.0988
Aphelion: 64.18918011 +/- 0.1071
Period (y) 374.3735 +/- 0.46
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -46.03085732 +/- 0.0036
Ecliptic Y 5.14354058 +/- 0.0004
Ecliptic Z 1.33463707 +/- 0.0001
Ecliptic XDOT -0.00077285 +/- 0.0000
Ecliptic YDOT -0.00219772 +/- 0.0000
Ecliptic ZDOT 0.00128384 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 46.33656322 +/- 0.0036
Geocenter to KBO 45.35506534 +/- 0.0036
# Hcoef: 7.62
The following table shows the complete astrometric record for 19EH7. 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 (19EH7) followed by the observatory code and reference code for the source of the astrometry.
2017 03 24.211889 11 38 27.674 +04 09 56.95 23.5V 19EH7 W84 C~8HR7 2018 03 18.47675 11 43 37.71 +04 14 00.7 24.0i 19EH7 T09 C~83G9 2018 03 18.57604 11 43 37.29 +04 14 03.9 23.7i 19EH7 T09 C~83G9 2018 03 18.58939 11 43 37.24 +04 14 04.1 23.8i 19EH7 T09 C~83G9 2018 03 18.60275 11 43 37.20 +04 14 04.9 23.9i 19EH7 T09 C~83G9 2018 03 18.60542 11 43 37.17 +04 14 04.9 23.7i 19EH7 T09 C~83G9 2018 04 12.109625 11 42 03.230 +04 26 24.50 24.0V 19EH7 W84 C~8HR7 2018 04 13.107344 11 41 59.750 +04 26 51.65 23.7V 19EH7 W84 C~8HR7 2018 04 24.36908 11 41 23.49 +04 31 34.7 24.1z 19EH7 T09 C~83G9 2018 04 24.37247 11 41 23.47 +04 31 34.8 24.3z 19EH7 T09 C~83G9 2018 04 24.41221 11 41 23.36 +04 31 35.8 23.7z 19EH7 T09 C~83G9 2018 04 24.45861 11 41 23.21 +04 31 36.8 24.3z 19EH7 T09 C~83G9 2019 02 05.47125 11 50 49.88 +03 59 50.9 24.2i 19EH7 T09 C~83G9 2019 02 05.48460 11 50 49.84 +03 59 51.6 23.8i 19EH7 T09 C~83G9 2019 02 05.52237 11 50 49.71 +03 59 52.3 24.2i 19EH7 T09 C~83G9 2019 02 05.52504 11 50 49.72 +03 59 52.3 24.5i 19EH7 T09 C~83G9 2019 03 02.44784 11 49 25.27 +04 12 21.3 24.1y 19EH7 T09 C~83G9 2019 03 02.54583 11 49 24.92 +04 12 24.5 24.7y 19EH7 T09 C~83G9 2019 03 02.57532 11 49 24.78 +04 12 25.4 23.9y 19EH7 T09 C~83G9 2019 03 02.58604 11 49 24.74 +04 12 25.7 24.0y 19EH7 T09 C~83G9 2019 03 08.37068 11 49 02.26 +04 15 32.6 24.9r 19EH7 T09 C~83G9 2019 03 08.38114 11 49 02.23 +04 15 32.8 24.4r 19EH7 T09 C~83G9 2019 03 08.41270 11 49 02.11 +04 15 34.0 24.5r 19EH7 T09 C~83G9 2019 03 08.41479 11 49 02.08 +04 15 34.0 24.6r 19EH7 T09 C~83G9
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 0.03 0.00 -0.04
2 0.9836 4160.94 0.09 2065.14 0.04
3 0.9839 4153.90 -0.11 2065.58 -0.03
4 0.9839 4153.13 0.04 2065.47 -0.21
5 0.9840 4152.27 0.09 2065.96 0.21
6 0.9840 4151.85 -0.14 2065.78 0.02
7 1.0511 2568.07 -0.01 2185.84 0.01
8 1.0538 2509.51 -0.02 2190.08 0.02
9 1.0846 1899.36 0.08 2234.46 -0.00
10 1.0846 1899.05 -0.06 2234.43 -0.04
11 1.0847 1897.14 0.04 2234.70 0.09
12 1.0849 1894.68 -0.07 2234.72 -0.03
13 1.8707 10438.88 0.14 3867.14 0.00
14 1.8707 10438.05 -0.01 3867.54 0.30
15 1.8708 10435.98 -0.17 3867.41 -0.12
16 1.8708 10436.11 0.10 3867.47 -0.08
17 1.9390 8975.16 -0.27 4048.85 -0.19
18 1.9393 8969.07 0.16 4049.69 0.06
19 1.9394 8966.79 -0.17 4049.67 -0.13
20 1.9394 8966.12 -0.13 4049.71 -0.16
21 1.9553 8582.43 -0.01 4086.65 0.06
22 1.9553 8581.93 0.21 4086.66 0.00
23 1.9554 8579.80 0.23 4087.04 0.20
24 1.9554 8579.39 -0.04 4086.86 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.
19EH7 quality flag:1 Type: 9:4EEEEE SCATNEAR SCATEXTD axisobj 51.627 51.750 51.505 ecceobj 0.237 0.241 0.232 incobj 29.361 29.361 29.361 qmin 33.218 38.744 39.018 qmax 70.922 65.458 64.721 amean 51.700 51.827 51.603 amin 51.199 51.350 51.141 amax 52.337 52.397 52.155 emean 0.299 0.233 0.224 emin 0.216 0.216 0.206 emax 0.355 0.250 0.242 imean 26.465 28.839 28.835 imin 24.353 28.487 28.481 imax 29.089 29.298 29.307 excite_mean 0.538 0.536 0.532 fracstop 1.000 1.000 1.000 cjmean 2.818 2.817 2.819 libcent 0 178.9 -180.0 -180.0 libamp 0 176.4 -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 174.4 170.8 169.5 kozaiamp 180.0 180.0 180.0