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: 15FG561 # Created Mon Jun 30 01:10:23 2025 # Orbit generated from Bernstein formalism # Fitting 16 observations of 16 # Arc: 1.01y # First observation: 2014/03/25 # Last observation: 2015/03/29 Preliminary a, adot, b, bdot, g, gdot: -0.000005 0.027925 0.000001 0.010411 0.026240 0.000000 # Chi-squared of fit: 3.33 DOF: 26 RMS: 0.08 # Min/Max residuals: -0.18 0.17 # Exact a, adot, b, bdot, g, gdot: 1.762307E-05 2.808504E-02 6.019051E-06 1.047107E-02 2.653202E-02 6.511764E-03 # Covariance matrix: 3.6899E-13 1.2261E-11 -4.5310E-14 4.7865E-12 9.9687E-12 4.5207E-10 1.2261E-11 1.3517E-09 -3.9790E-12 5.2143E-10 7.5221E-10 4.9217E-08 -4.5310E-14 -3.9790E-12 1.9761E-13 -1.7179E-12 -2.5937E-12 -1.4477E-10 4.7865E-12 5.2143E-10 -1.7179E-12 2.0157E-10 2.8956E-10 1.8991E-08 9.9687E-12 7.5221E-10 -2.5937E-12 2.8956E-10 5.5166E-10 2.7344E-08 4.5207E-10 4.9217E-08 -1.4477E-10 1.8991E-08 2.7344E-08 1.7925E-06 # lat0 lon0 xBary yBary zBary JD0 14.257340 -147.862801 0.458037 0.217900 -0.857215 2456742.074658 # Heliocentric elements and errors Epoch: 2456740.5000 = 2014/03/24 Mean Anomaly: 21.11433 +/- 2.239 Argument of Peri: 349.63026 +/- 5.985 Long of Asc Node: 178.80174 +/- 0.006 Inclination: 24.70580 +/- 0.003 Eccentricity: 0.36078265 +/- 0.0411 Semi-Major Axis: 55.51816410 +/- 1.9394 Time of Perihelion: 2447878.6196 +/- 816.8 Perihelion: 35.48817382 +/- 2.5961 Aphelion: 75.54815438 +/- 3.4882 Period (y) 413.6765 +/- 21.68 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -31.92595034 +/- 0.0274 Ecliptic Y -19.51290043 +/- 0.0172 Ecliptic Z 9.28252314 +/- 0.0082 Ecliptic XDOT 0.00120991 +/- 0.0001 Ecliptic YDOT -0.00266211 +/- 0.0001 Ecliptic ZDOT 0.00121285 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 38.55106775 +/- 0.0244 Geocenter to KBO 37.69031319 +/- 0.0334 # Hcoef: 8.27
The following table shows the complete astrometric record for 15FG561. 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 (15FG561) followed by the observatory code and reference code for the source of the astrometry.
2014 03 25.57388 14 19 18.62 +01 11 46.2 23.5y 15FG561 T09 C~8uZK 2014 03 25.58653 14 19 18.58 +01 11 46.5 23.1y 15FG561 T09 C~8uZK 2014 03 25.60695 14 19 18.51 +01 11 47.5 24.0y 15FG561 T09 C~8uZK 2014 03 25.62268 14 19 18.45 +01 11 48.0 24.3y 15FG561 T09 C~8uZK 2014 03 28.52816 14 19 07.07 +01 13 39.8 23.7i 15FG561 T09 C~8uZK 2014 03 28.54778 14 19 06.98 +01 13 40.6 24.0i 15FG561 T09 C~8uZK 2014 03 28.56347 14 19 06.91 +01 13 41.1 23.9i 15FG561 T09 C~8uZK 2014 03 28.58431 14 19 06.84 +01 13 41.9 23.7i 15FG561 T09 C~8uZK 2015 03 25.57140 14 26 09.26 +01 12 52.2 25.7g 15FG561 T09 C~8uZK 2015 03 25.58579 14 26 09.20 +01 12 52.7 25.5g 15FG561 T09 C~8uZK 2015 03 25.58794 14 26 09.19 +01 12 52.8 25.3g 15FG561 T09 C~8uZK 2015 03 29.42794 14 25 54.54 +01 15 19.7 23.4y 15FG561 T09 C~8uZK 2015 03 29.44155 14 25 54.47 +01 15 20.2 23.4y 15FG561 T09 C~8uZK 2015 03 29.55581 14 25 54.02 +01 15 24.6 23.6z 15FG561 T09 C~8uZK 2015 03 29.58485 14 25 53.90 +01 15 25.7 23.8z 15FG561 T09 C~8uZK 2015 03 29.59846 14 25 53.84 +01 15 26.2 23.7z 15FG561 T09 C~8uZK
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 -0.18 0.00 0.05
2 0.0000 -0.67 0.02 0.08 -0.08
3 0.0001 -1.99 0.09 0.67 0.17
4 0.0001 -3.01 0.14 0.84 0.07
5 0.0081 -201.36 0.07 48.61 -0.00
6 0.0081 -202.90 -0.08 48.90 -0.01
7 0.0082 -204.05 -0.13 49.02 -0.13
8 0.0082 -205.31 0.08 49.42 -0.06
9 0.9993 5777.04 0.04 2139.31 0.04
10 0.9993 5776.02 -0.02 2139.48 -0.03
11 0.9994 5775.84 -0.05 2139.52 -0.03
12 1.0099 5519.26 0.14 2203.65 0.04
13 1.0099 5518.10 -0.07 2203.77 -0.06
14 1.0102 5510.26 0.04 2205.63 0.04
15 1.0103 5508.19 -0.00 2206.06 0.02
16 1.0103 5507.18 -0.07 2206.22 -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.
15FG561 quality flag:1 Type: 5:2EEE SCATNEAR SCATNEAR Type: 5:2EII axisobj 54.985 63.142 50.804 ecceobj 0.354 0.481 0.251 incobj 24.778 24.785 24.771 qmin 32.710 30.622 36.614 qmax 79.258 102.673 66.377 amean 55.461 64.898 51.194 amin 54.836 62.687 50.722 amax 56.294 66.991 51.772 emean 0.386 0.504 0.265 emin 0.352 0.471 0.249 emax 0.409 0.533 0.282 imean 22.681 23.191 23.954 imin 21.633 21.616 23.538 imax 24.358 24.827 24.348 excite_mean 0.546 0.640 0.485 fracstop 1.000 1.000 1.000 cjmean 2.852 2.794 2.886 libcent 0 180.1 -180.0 -180.0 libamp 0 61.0 -180.0 -180.0 libcent 1 159.1 -180.0 -180.0 libamp 1 86.2 -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 316.0 153.7 177.6 kozaiamp 180.0 180.0 179.9