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: 19AU138 # Created Fri Nov 22 02:10:56 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 60 observations of 60 # Arc: 18.15y # First observation: 2002/01/09 # Last observation: 2020/03/05 # Chi-squared of fit: 25.81 DOF: 114 RMS: 0.12 # Min/Max residuals: -0.32 0.38 # Exact a, adot, b, bdot, g, gdot: 1.676545E-05 3.587100E-02 -5.980527E-06 -1.192295E-02 3.336899E-02 8.347240E-04 # Covariance matrix: 1.5722E-13 -2.5320E-14 -1.3858E-14 5.5865E-15 -2.8317E-14 -2.2527E-14 -2.5320E-14 9.5354E-15 6.7708E-15 -2.8434E-15 2.0738E-14 1.1368E-14 -1.3858E-14 6.7708E-15 1.2427E-13 -1.0313E-14 1.4006E-14 8.7454E-15 5.5865E-15 -2.8434E-15 -1.0313E-14 1.5632E-15 -6.4350E-15 -3.6477E-15 -2.8317E-14 2.0738E-14 1.4006E-14 -6.4350E-15 7.6403E-14 2.5273E-14 -2.2527E-14 1.1368E-14 8.7454E-15 -3.6477E-15 2.5273E-14 1.4604E-14 # lat0 lon0 xBary yBary zBary JD0 -0.302102 111.452681 0.041168 -0.005238 -0.977768 2452283.830057 # Heliocentric elements and errors Epoch: 2452284.5000 = 2002/01/10 Mean Anomaly: 60.53267 +/- 0.001 Argument of Peri: 117.92929 +/- 0.001 Long of Asc Node: 290.48751 +/- 0.000 Inclination: 18.33730 +/- 0.000 Eccentricity: 0.02442066 +/- 0.0000 Semi-Major Axis: 31.31220231 +/- 0.0154 Time of Perihelion: 2441523.4128 +/- 7.9 Perihelion: 30.54753753 +/- 0.0150 Aphelion: 32.07686710 +/- 0.0158 Period (y) 175.2180 +/- 0.13 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -11.27839432 +/- 0.0002 Ecliptic Y 28.82187578 +/- 0.0004 Ecliptic Z -0.15818756 +/- 0.0000 Ecliptic XDOT -0.00277094 +/- 0.0000 Ecliptic YDOT -0.00101782 +/- 0.0000 Ecliptic ZDOT -0.00097839 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 30.95039598 +/- 0.0003 Geocenter to KBO 29.96797157 +/- 0.0004 # Hcoef: 7.76
The following table shows the complete astrometric record for 19AU138. 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 (19AU138) followed by the observatory code and reference code for the source of the astrometry.
2002 01 09.329314 07 32 32.30 +21 25 50.7 19AU138 645 C~81DY 2002 01 09.330143 07 32 32.31 +21 25 50.8 19AU138 645 C~81DY 2002 01 14.191655 07 31 57.52 +21 26 34.2 19AU138 645 C~81DY 2002 01 14.192485 07 31 57.51 +21 26 33.9 19AU138 645 C~81DY 2002 01 14.194972 07 31 57.48 +21 26 34.0 19AU138 645 C~81DY 2002 11 07.388945 07 46 02.14 +20 20 33.4 19AU138 645 C~81DY 2002 11 07.389774 07 46 02.13 +20 20 33.2 19AU138 645 C~81DY 2002 11 07.392262 07 46 02.12 +20 20 33.6 19AU138 645 C~81DY 2002 12 31.263088 07 41 50.82 +20 23 49.6 22.2r 19AU138 645 C~81DY 2002 12 31.263917 07 41 50.80 +20 23 49.5 22.4i 19AU138 645 C~81DY 2002 12 31.266405 07 41 50.81 +20 23 49.6 22.8g 19AU138 645 C~81DY 2013 03 26.014377 08 49 50.53 +09 51 34.0 22.1r 19AU138 W84 C~81DY 2013 03 31.025289 08 49 35.736 +09 53 08.91 22.2z 19AU138 W84 C~85K5 2013 03 31.025289 08 49 35.76 +09 53 09.1 21.7z 19AU138 W84 C~81DY 2013 04 01.088895 08 49 32.963 +09 53 28.23 22.1z 19AU138 W84 C~85K5 2014 03 30.009344 08 56 48.496 +08 44 18.11 22.8R 19AU138 W84 C~85K5 2014 03 30.011398 08 56 48.485 +08 44 18.12 22.9R 19AU138 W84 C~85K5 2014 03 30.012080 08 56 48.482 +08 44 18.09 22.7R 19AU138 W84 C~85K5 2014 03 30.012748 08 56 48.483 +08 44 18.13 22.5R 19AU138 W84 C~85K5 2014 03 30.014092 08 56 48.478 +08 44 18.14 22.8R 19AU138 W84 C~85K5 2014 03 30.014769 08 56 48.472 +08 44 18.01 22.5R 19AU138 W84 C~85K5 2014 03 30.015422 08 56 48.468 +08 44 18.20 22.4R 19AU138 W84 C~85K5 2014 03 30.016119 08 56 48.471 +08 44 18.19 22.7R 19AU138 W84 C~85K5 2014 03 30.017520 08 56 48.472 +08 44 18.25 22.6R 19AU138 W84 C~85K5 2014 03 30.018208 08 56 48.464 +08 44 18.29 22.7R 19AU138 W84 C~85K5 2014 03 30.018874 08 56 48.465 +08 44 18.24 22.8R 19AU138 W84 C~85K5 2014 03 30.020083 08 56 48.469 +08 44 18.33 22.6R 19AU138 W84 C~85K5 2014 03 30.021452 08 56 48.472 +08 44 18.38 22.7R 19AU138 W84 C~85K5 2014 03 30.022802 08 56 48.464 +08 44 18.12 22.7R 19AU138 W84 C~85K5 2014 03 30.023482 08 56 48.451 +08 44 18.29 22.5R 19AU138 W84 C~85K5 2014 03 30.024170 08 56 48.453 +08 44 18.31 22.6R 19AU138 W84 C~85K5 2014 03 30.024825 08 56 48.450 +08 44 18.45 22.5R 19AU138 W84 C~85K5 2014 03 30.025495 08 56 48.436 +08 44 18.33 22.5R 19AU138 W84 C~85K5 2014 03 30.026851 08 56 48.446 +08 44 18.46 22.4R 19AU138 W84 C~85K5 2014 03 30.027510 08 56 48.436 +08 44 18.40 23.0R 19AU138 W84 C~85K5 2014 03 30.028184 08 56 48.440 +08 44 18.48 22.5R 19AU138 W84 C~85K5 2014 03 30.028872 08 56 48.435 +08 44 18.41 22.7R 19AU138 W84 C~85K5 2014 03 30.029541 08 56 48.427 +08 44 18.40 22.7R 19AU138 W84 C~85K5 2014 03 30.030227 08 56 48.424 +08 44 18.40 22.7R 19AU138 W84 C~85K5 2014 03 30.031569 08 56 48.423 +08 44 18.44 22.5R 19AU138 W84 C~85K5 2016 01 10.258872 09 18 23.506 +05 54 43.39 22.9r 19AU138 W84 C~85K5 2016 01 10.259951 09 18 23.503 +05 54 43.44 22.9g 19AU138 W84 C~85K5 2018 02 05.260794 09 29 48.317 +03 40 39.84 22.5i 19AU138 W84 C~85K5 2018 11 15.54315 09 41 26.99 +02 35 42.0 22.7z 19AU138 T09 C~7n6l 2018 11 15.55808 09 41 27.00 +02 35 41.6 22.5z 19AU138 T09 C~7n6l 2018 11 15.59379 09 41 27.01 +02 35 40.4 22.6z 19AU138 T09 C~7n6l 2018 11 15.61997 09 41 27.05 +02 35 39.8 22.5z 19AU138 T09 C~7n6l 2018 12 12.223920 09 41 10.491 +02 24 51.10 23.2g 19AU138 W84 C~85K5 2019 01 06.45953 09 39 39.78 +02 22 35.8 23.3g 19AU138 T09 C~7n6l 2019 01 06.56568 09 39 39.25 +02 22 36.3 23.3g 19AU138 T09 C~7n6l 2019 01 06.58698 09 39 39.15 +02 22 36.7 23.3g 19AU138 T09 C~7n6l 2019 01 06.61913 09 39 38.99 +02 22 36.7 23.5g 19AU138 T09 C~7n6l 2019 03 08.26245 09 33 39.81 +02 44 14.0 22.8r 19AU138 T09 C~7n6l 2019 03 08.29600 09 33 39.63 +02 44 15.0 22.6r 19AU138 T09 C~7n6l 2019 03 08.32553 09 33 39.46 +02 44 16.2 22.6r 19AU138 T09 C~7n6l 2019 03 08.33611 09 33 39.40 +02 44 16.4 22.7r 19AU138 T09 C~7n6l 2019 03 15.28996 09 33 02.21 +02 47 58.4 22.2y 19AU138 T09 C~7n6l 2019 03 15.31422 09 33 02.08 +02 47 59.4 22.3y 19AU138 T09 C~7n6l 2019 03 15.31689 09 33 02.07 +02 47 59.4 22.2y 19AU138 T09 C~7n6l 2020 03 05.151328 09 40 50.68 +01 32 07.6 21.9i 19AU138 W84 C~81DY
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 0.06 0.00 0.06
2 0.0000 0.00 0.30 0.00 0.15
3 0.0133 0.00 -0.03 0.00 0.13
4 0.0133 0.00 -0.09 0.00 -0.18
5 0.0133 0.00 -0.27 0.00 -0.10
6 0.8270 0.00 0.08 0.00 0.17
7 0.8270 0.00 -0.05 0.00 -0.03
8 0.8270 0.00 -0.14 0.00 0.38
9 0.9745 0.00 0.04 0.00 -0.10
10 0.9745 0.00 -0.18 0.00 -0.21
11 0.9745 0.00 0.23 0.00 -0.13
12 11.2079 0.00 0.01 0.00 -0.18
13 11.2216 0.00 0.25 0.00 0.06
14 11.2216 0.00 -0.11 0.00 -0.13
15 11.2245 0.00 -0.03 0.00 0.12
16 12.2182 0.00 -0.01 0.00 0.06
17 12.2182 0.00 -0.08 0.00 0.03
18 12.2182 0.00 -0.09 0.00 -0.01
19 12.2182 0.00 -0.04 0.00 0.01
20 12.2182 0.00 -0.06 0.00 -0.00
21 12.2182 0.00 -0.11 0.00 -0.15
22 12.2182 0.00 -0.14 0.00 0.03
23 12.2182 0.00 -0.07 0.00 0.00
24 12.2182 0.00 0.01 0.00 0.04
25 12.2182 0.00 -0.07 0.00 0.06
26 12.2182 0.00 -0.03 0.00 -0.00
27 12.2182 0.00 0.09 0.00 0.06
28 12.2182 0.00 0.20 0.00 0.08
29 12.2182 0.00 0.14 0.00 -0.20
30 12.2182 0.00 -0.02 0.00 -0.05
31 12.2182 0.00 0.04 0.00 -0.04
32 12.2182 0.00 0.02 0.00 0.08
33 12.2182 0.00 -0.16 0.00 -0.05
34 12.2182 0.00 0.06 0.00 0.05
35 12.2182 0.00 -0.06 0.00 -0.02
36 12.2182 0.00 0.03 0.00 0.04
37 12.2182 0.00 -0.01 0.00 -0.04
38 12.2182 0.00 -0.10 0.00 -0.06
39 12.2182 0.00 -0.12 0.00 -0.08
40 12.2182 0.00 -0.07 0.00 -0.07
41 14.0012 0.00 0.06 0.00 0.08
42 14.0012 0.00 0.10 0.00 0.12
43 16.0737 0.00 0.11 0.00 -0.09
44 16.8493 0.00 0.10 0.00 -0.12
45 16.8494 0.00 0.04 0.00 -0.03
46 16.8495 0.00 -0.32 0.00 -0.04
47 16.8495 0.00 -0.09 0.00 0.23
48 16.9224 0.00 0.16 0.00 -0.18
49 16.9915 0.00 0.06 0.00 -0.13
50 16.9917 0.00 -0.06 0.00 -0.07
51 16.9918 0.00 0.01 0.00 0.24
52 16.9919 0.00 -0.02 0.00 0.10
53 17.1579 0.00 -0.04 0.00 0.00
54 17.1580 0.00 0.12 0.00 -0.07
55 17.1581 0.00 0.08 0.00 0.19
56 17.1581 0.00 0.08 0.00 0.06
57 17.1772 0.00 -0.03 0.00 -0.11
58 17.1772 0.00 -0.09 0.00 0.11
59 17.1772 0.00 -0.03 0.00 0.02
60 18.1515 0.00 0.10 0.00 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.
19AU138 quality flag:2 Type: CENTAURR REMOVED REMOVED axisobj 31.209 31.209 31.209 ecceobj 0.025 0.025 0.025 incobj 18.372 18.372 18.372 qmin 30.069 30.309 30.217 qmax 35.075 38.387 34.439 amean 32.087 33.385 31.853 amin 31.146 31.146 31.146 amax 32.972 34.542 32.680 emean 0.041 0.078 0.031 emin 0.010 0.021 0.005 emax 0.064 0.112 0.054 imean 20.286 20.011 20.089 imin 19.906 19.838 19.914 imax 20.617 20.255 20.321 excite_mean 0.349 0.351 0.345 fracstop 0.028 0.022 0.013 cjmean 2.876 2.876 2.877 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 192.4 111.1 86.8 kozaiamp 144.5 73.0 175.0