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: 19EA5 # Created Tue Apr 1 01:11:11 2025 # Orbit generated from Bernstein formalism # Fitting 9 observations of 9 # Arc: 1.87y # First observation: 2019/03/06 # Last observation: 2021/01/16 Preliminary a, adot, b, bdot, g, gdot: -0.000014 0.011239 0.000001 0.005584 0.016300 0.000000 # Chi-squared of fit: 6.79 DOF: 12 RMS: 0.15 # Min/Max residuals: -0.20 0.33 # Exact a, adot, b, bdot, g, gdot: 1.182974E-05 1.134952E-02 5.610967E-06 5.652550E-03 1.652606E-02 6.060601E-03 # Covariance matrix: 5.1888E-13 -1.9707E-12 9.3378E-14 -5.1867E-13 -1.4184E-14 -4.8812E-11 -1.9707E-12 3.4529E-11 -1.6419E-12 9.8665E-12 -3.4720E-12 9.2962E-10 9.3378E-14 -1.6419E-12 4.6070E-13 -7.6044E-13 1.2665E-13 -4.5283E-11 -5.1867E-13 9.8665E-12 -7.6044E-13 3.2331E-12 -9.0213E-13 2.7000E-10 -1.4184E-14 -3.4720E-12 1.2665E-13 -9.0213E-13 9.7085E-13 -8.5189E-11 -4.8812E-11 9.2962E-10 -4.5283E-11 2.7000E-10 -8.5189E-11 2.5436E-08 # lat0 lon0 xBary yBary zBary JD0 -7.756011 144.107391 -0.348823 -0.125711 -0.923556 2458548.665621 # Heliocentric elements and errors Epoch: 2458540.5000 = 2019/02/26 Mean Anomaly: 49.85693 +/- 1.204 Argument of Peri: 241.35627 +/- 0.409 Long of Asc Node: 159.33531 +/- 0.003 Inclination: 27.55592 +/- 0.005 Eccentricity: 0.44779801 +/- 0.0113 Semi-Major Axis: 69.71626553 +/- 0.9443 Time of Perihelion: 2429094.7493 +/- 384.9 Perihelion: 38.49746063 +/- 0.9427 Aphelion: 100.93507044 +/- 1.5767 Period (y) 582.1158 +/- 11.83 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -49.53091369 +/- 0.0029 Ecliptic Y 35.40658241 +/- 0.0021 Ecliptic Z -8.16588190 +/- 0.0005 Ecliptic XDOT -0.00200250 +/- 0.0000 Ecliptic YDOT -0.00086724 +/- 0.0000 Ecliptic ZDOT 0.00079217 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 61.42979014 +/- 0.0026 Geocenter to KBO 60.51048559 +/- 0.0036 # Hcoef: 6.63
The following table shows the complete astrometric record for 19EA5. 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 (19EA5) followed by the observatory code and reference code for the source of the astrometry.
2019 03 06.16482 09 35 21.382 +06 09 24.92 24.6r 19EA5 807 C~4Za0 2019 03 07.14937 09 35 18.454 +06 09 46.05 24.7r 19EA5 807 C~4Za0 2019 04 04.99755 09 34 08.428 +06 19 38.40 24.7r 19EA5 807 C~4Za0 2019 11 29.33013 09 42 13.817 +05 54 38.08 24.2r 19EA5 304 C~4Za0 2019 11 30.33204 09 42 13.360 +05 54 36.00 24.2r 19EA5 304 C~4Za0 2019 12 27.30457 09 41 38.430 +05 55 54.28 19EA5 304 C~4Za0 2019 12 27.35427 09 41 38.325 +05 55 54.69 19EA5 304 C~4Za0 2021 01 15.18390 09 43 39.042 +06 05 07.24 19EA5 304 C~4Za0 2021 01 16.17039 09 43 36.265 +06 05 21.01 19EA5 304 C~4Za0
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 -0.20 0.00 -0.04
2 0.0027 -48.16 -0.17 5.84 -0.10
3 0.0817 -1227.89 0.31 228.14 0.33
4 0.7342 6107.58 0.09 1165.12 -0.00
5 0.7369 6101.81 0.13 1160.92 0.05
6 0.8108 5583.27 -0.05 1064.42 -0.19
7 0.8109 5581.66 -0.07 1064.29 -0.17
8 1.8645 7104.05 -0.10 2176.60 0.14
9 1.8672 7060.35 0.05 2176.03 -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.
19EA5 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 70.589 73.589 67.990 ecceobj 0.455 0.487 0.424 incobj 27.587 27.574 27.601 qmin 37.555 36.849 38.270 qmax 104.584 111.301 98.762 amean 70.195 73.144 67.706 amin 69.356 72.192 66.893 amax 71.446 74.421 68.839 emean 0.448 0.480 0.418 emin 0.431 0.463 0.402 emax 0.464 0.496 0.435 imean 26.772 26.744 26.755 imin 26.220 26.204 26.221 imax 27.525 27.605 27.426 excite_mean 0.635 0.658 0.614 fracstop 1.000 1.000 1.000 cjmean 2.866 2.853 2.878 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 174.3 176.0 175.4 kozaiamp 179.9 180.0 180.0