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: 19UW173 # Created Sun Dec 22 02:11:10 2024 # Orbit generated from Bernstein formalism # Fitting 38 observations of 39 # Arc: 3.06y # First observation: 2016/11/29 # Last observation: 2019/12/22 Preliminary a, adot, b, bdot, g, gdot: -0.000417 0.028655 0.000010 0.005792 0.027668 0.000000 # Chi-squared of fit: 27.25 DOF: 70 RMS: 0.15 # Min/Max residuals: -0.51 0.26 # Exact a, adot, b, bdot, g, gdot: 1.686513E-05 2.863606E-02 3.605241E-06 5.810887E-03 2.711933E-02 2.164622E-03 # Covariance matrix: 7.3077E-13 -6.1456E-13 2.4780E-14 -8.2271E-14 -3.2401E-13 -4.3445E-12 -6.1456E-13 1.3372E-12 -6.9589E-14 2.3759E-13 5.2431E-13 1.2815E-11 2.4780E-14 -6.9589E-14 4.7445E-13 -1.7430E-13 -2.8687E-14 -6.9822E-13 -8.2271E-14 2.3759E-13 -1.7430E-13 1.0452E-13 9.4702E-14 2.3886E-12 -3.2401E-13 5.2431E-13 -2.8687E-14 9.4702E-14 4.0690E-13 4.9788E-12 -4.3445E-12 1.2815E-11 -6.9822E-13 2.3886E-12 4.9788E-12 1.2903E-10 # lat0 lon0 xBary yBary zBary JD0 -18.217304 26.518376 -0.647493 -0.234407 -0.712862 2457721.939465 # Heliocentric elements and errors Epoch: 2457720.5000 = 2016/11/28 Mean Anomaly: 35.45862 +/- 0.076 Argument of Peri: 256.16130 +/- 0.117 Long of Asc Node: 83.29066 +/- 0.001 Inclination: 21.29865 +/- 0.000 Eccentricity: 0.13999299 +/- 0.0003 Semi-Major Axis: 42.05220874 +/- 0.0051 Time of Perihelion: 2447909.7780 +/- 21.0 Perihelion: 36.16519421 +/- 0.0143 Aphelion: 47.93922328 +/- 0.0148 Period (y) 272.7039 +/- 0.05 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 31.71948229 +/- 0.0007 Ecliptic Y 16.54978686 +/- 0.0004 Ecliptic Z -11.52755080 +/- 0.0003 Ecliptic XDOT -0.00093858 +/- 0.0000 Ecliptic YDOT 0.00275464 +/- 0.0000 Ecliptic ZDOT 0.00048887 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 37.58863431 +/- 0.0006 Geocenter to KBO 36.87406317 +/- 0.0009 # Hcoef: 9.65
The following table shows the complete astrometric record for 19UW173. 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 (19UW173) followed by the observatory code and reference code for the source of the astrometry.
2016 11 29.438676 02 04 32.84 -06 47 02.1 19UW173 T09 C~83Gd 2016 11 29.444225 02 04 32.82 -06 47 02.0 19UW173 T09 C~83Gd 2017 08 28.563653 02 16 58.09 -05 15 50.9 19UW173 T09 C~83Gd 2017 08 28.617559 02 16 57.98 -05 15 52.6 19UW173 T09 C~83Gd 2019 09 29.44283 02 26 24.44 -03 45 18.5 25.6r 19UW173 T09 C~7ulL 2019 09 29.46532 02 26 24.34 -03 45 19.0 25.8r 19UW173 T09 C~7ulL 2019 09 29.54579 02 26 23.97 -03 45 21.7 25.9i 19UW173 T09 C~7ulL 2019 09 29.60928 02 26 23.71 -03 45 23.2 25.1z 19UW173 T09 C~7ulL 2019 10 23.53309 02 24 29.84 -03 56 49.2 24.3z 19UW173 T09 C~7ulL 2019 10 23.55512 02 24 29.73 -03 56 49.7 24.4z 19UW173 T09 C~7ulL 2019 10 23.55861 02 24 29.71 -03 56 50.2 24.6z 19UW173 T09 C~7ulL 2019 10 27.29097 02 24 10.46 -03 58 18.3 25.7r 19UW173 T09 C~7ulL 2019 10 27.30213 02 24 10.39 -03 58 18.7 25.3r 19UW173 T09 C~7ulL 2019 10 27.31332 02 24 10.33 -03 58 18.9 25.6r 19UW173 T09 C~7ulL 2019 10 27.31576 02 24 10.32 -03 58 19.2 25.5r 19UW173 T09 C~7ulL 2019 10 27.42875 02 24 09.73 -03 58 21.4 24.9i 19UW173 T09 C~7ulL 2019 10 27.44703 02 24 09.62 -03 58 21.9 24.8i 19UW173 T09 C~7ulL 2019 10 31.49580 02 23 48.57 -03 59 49.9 25.2z 19UW173 T09 C~7ulL 2019 10 31.53991 02 23 48.32 -03 59 50.9 25.7z 19UW173 T09 C~7ulL 2019 10 31.55809 02 23 48.24 -03 59 51.2 25.1z 19UW173 T09 C~7ulL 2019 11 01.35808 02 23 44.06 -04 00 07.8 25.8g 19UW173 T09 C~7ulL 2019 11 01.36928 02 23 44.03 -04 00 07.5 26.1g 19UW173 T09 C~7ulL 2019 11 01.44979 02 23 43.59 -04 00 09.4 26.3g 19UW173 T09 C~7ulL 2019 11 01.52871 02 23 43.18 -04 00 10.9 26.1g 19UW173 T09 C~7ulL 2019 11 01.57346 02 23 42.95 -04 00 11.7 26.1g 19UW173 T09 C~7ulL 2019 11 27.25481 02 21 35.18 -04 05 29.3 25.1z 19UW173 T09 C~7ulL 2019 11 27.32148 02 21 34.89 -04 05 29.5 24.9i 19UW173 T09 C~7ulL 2019 11 27.34361 02 21 34.76 -04 05 29.5 25.4i 19UW173 T09 C~7ulL 2019 11 27.36574 02 21 34.67 -04 05 29.6 25.0i 19UW173 T09 C~7ulL 2019 11 27.45540 02 21 34.27 -04 05 30.1 25.5r 19UW173 T09 C~7ulL 2019 12 04.32949 02 21 04.44 -04 05 39.0 25.0z 19UW173 T09 C~7ulL 2019 12 04.35162 02 21 04.36 -04 05 38.8 25.5z 19UW173 T09 C~7ulL 2019 12 04.39987 02 21 04.15 -04 05 38.3 24.8i 19UW173 T09 C~7ulL 2019 12 04.42190 02 21 04.07 -04 05 38.3 25.1i 19UW173 T09 C~7ulL 2019 12 04.44386 02 21 03.97 -04 05 38.2 25.3i 19UW173 T09 C~7ulL 2019 12 22.27977 02 20 01.65 -04 03 18.2 25.9r 19UW173 T09 C~7ulL 2019 12 22.29498 02 20 01.61 -04 03 18.1 25.6r 19UW173 T09 C~7ulL 2019 12 22.30453 02 20 01.57 -04 03 17.7 25.4r 19UW173 T09 C~7ulL 2019 12 22.36184 02 20 01.43 -04 03 17.2 24.9i 19UW173 T09 C~7ulL
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 0.0000 -0.24 0.04 0.20 0.02
3 0.7450 12357.23 -0.05 1087.74 -0.01
4 0.7452 12355.08 0.03 1086.75 0.01
5 2.8309 22297.93 0.19 3063.18 0.01
6 2.8310 22296.33 0.22 3063.26 0.23
7 2.8312 22290.12 -0.17 3062.77 0.22
8 2.8314 22285.90 ( 0.21) 3062.80 ( 0.62)
9 2.8969 20428.95 0.13 3047.28 0.14
10 2.8970 20427.22 0.21 3047.41 0.15
11 2.8970 20426.76 0.03 3047.05 -0.22
12 2.9072 20123.52 0.15 3070.39 0.00
13 2.9072 20122.39 -0.06 3070.40 -0.07
14 2.9073 20121.47 -0.06 3070.54 -0.01
15 2.9073 20121.22 -0.11 3070.32 -0.25
16 2.9076 20112.11 0.11 3071.50 0.07
17 2.9076 20110.38 -0.11 3071.63 0.06
18 2.9187 19781.98 0.03 3104.90 -0.06
19 2.9188 19778.10 -0.24 3105.34 -0.05
20 2.9189 19776.86 0.01 3105.50 -0.07
21 2.9211 19711.99 -0.51 3112.92 -0.13
22 2.9211 19711.68 0.09 3113.36 0.20
23 2.9213 19704.79 -0.19 3114.00 0.02
24 2.9215 19698.48 -0.05 3114.85 0.06
25 2.9217 19694.95 0.06 3115.36 0.12
26 2.9920 17783.71 -0.09 3518.65 -0.05
27 2.9922 17779.57 0.19 3520.05 -0.09
28 2.9922 17777.74 -0.17 3520.76 0.14
29 2.9923 17776.44 0.00 3521.16 0.05
30 2.9925 17770.65 0.13 3522.88 -0.18
31 3.0113 17348.88 -0.28 3677.75 -0.39
32 3.0114 17347.84 -0.03 3678.38 -0.30
33 3.0115 17345.07 0.04 3679.99 0.14
34 3.0116 17343.95 0.21 3680.43 0.04
35 3.0117 17342.59 0.13 3681.07 0.15
36 3.0605 16520.09 0.00 4152.51 0.08
37 3.0605 16519.57 0.01 4152.83 -0.05
38 3.0605 16519.15 -0.06 4153.42 0.26
39 3.0607 16517.37 0.16 4154.65 -0.18
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.
19UW173 quality flag:2 Type: 5:3EE 5:3EE SCATEXTD axisobj 42.595 42.614 42.576 ecceobj 0.149 0.150 0.149 incobj 21.279 21.279 21.280 qmin 35.697 35.600 35.741 qmax 49.318 49.435 49.378 amean 42.327 42.327 42.327 amin 41.954 41.993 41.958 amax 42.730 42.696 42.750 emean 0.089 0.099 0.076 emin 0.012 0.034 0.002 emax 0.156 0.159 0.155 imean 20.464 20.390 20.504 imin 19.242 19.357 19.179 imax 21.521 21.358 21.392 excite_mean 0.363 0.364 0.361 fracstop 1.000 1.000 1.000 cjmean 2.923 2.922 2.924 libcent 0 185.0 182.1 -180.0 libamp 0 92.8 67.9 -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 177.2 176.1 181.0 kozaiamp 180.0 180.0 164.0