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: 16GA399 # Created Sun Oct 19 01:11:28 2025 # Orbit generated from Bernstein formalism # Fitting 16 observations of 16 # Arc: 25.99d # First observation: 2016/03/09 # Last observation: 2016/04/04 Preliminary a, adot, b, bdot, g, gdot: 0.000001 0.036433 -0.000003 -0.002731 0.030389 0.000000 # WARNING Fitting with energy constraint # Chi-squared of fit: 11.04 DOF: 27 RMS: 0.15 # Min/Max residuals: -0.41 0.24 # Exact a, adot, b, bdot, g, gdot: 1.774051E-05 3.344724E-02 -8.888814E-07 -2.089620E-03 2.957642E-02 -2.358087E-03 # Covariance matrix: 2.8467E-13 1.7844E-11 -7.3496E-14 -3.2235E-12 9.8449E-12 3.3248E-09 1.7844E-11 1.8438E-07 -1.7440E-10 -4.1277E-08 4.4314E-08 3.9014E-06 -7.3496E-14 -1.7440E-10 3.3681E-13 3.5589E-11 -4.3922E-11 -4.8659E-09 -3.2235E-12 -4.1277E-08 3.5589E-11 9.4072E-09 -9.8760E-09 -8.4303E-07 9.8449E-12 4.4314E-08 -4.3922E-11 -9.8760E-09 1.0837E-08 1.0441E-06 3.3248E-09 3.9014E-06 -4.8659E-09 -8.4303E-07 1.0441E-06 1.4545E-04 # lat0 lon0 xBary yBary zBary JD0 16.716551 -138.826733 0.780747 0.175104 -0.582559 2457457.114669 # Heliocentric elements and errors Epoch: 2457450.5000 = 2016/03/03 Mean Anomaly: 329.99630 +/- 78.717 Argument of Peri: 141.54159 +/- 118.672 Long of Asc Node: 118.50285 +/- 0.337 Inclination: 16.72617 +/- 0.019 Eccentricity: 0.15662941 +/- 0.2391 Semi-Major Axis: 39.46060537 +/- 2.1377 Time of Perihelion: 2464996.4934 +/- 19788.0 Perihelion: 33.27991412 +/- 9.6048 Aphelion: 45.64129662 +/- 9.7527 Period (y) 247.8870 +/- 20.14 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -25.34980834 +/- 0.0858 Ecliptic Y -21.13334379 +/- 0.0750 Ecliptic Z 9.72521643 +/- 0.0342 Ecliptic XDOT 0.00215369 +/- 0.0008 Ecliptic YDOT -0.00223653 +/- 0.0007 Ecliptic ZDOT -0.00024804 +/- 0.0003 # Distances at JD0 (AU) Heliocenter to KBO 34.40655225 +/- 0.0788 Geocenter to KBO 33.81072254 +/- 0.1190 # Hcoef: 9.23
The following table shows the complete astrometric record for 16GA399. 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 (16GA399) followed by the observatory code and reference code for the source of the astrometry.
2016 03 09.61388 14 55 27.62 +00 45 01.5 25.0r 16GA399 T09 C~94se 2016 03 09.62107 14 55 27.59 +00 45 01.8 24.8r 16GA399 T09 C~94se 2016 03 09.62752 14 55 27.57 +00 45 02.2 25.0r 16GA399 T09 C~94se 2016 03 09.65573 14 55 27.53 +00 45 03.0 25.2r 16GA399 T09 C~94se 2016 03 12.61090 14 55 19.98 +00 46 48.5 24.4z 16GA399 T09 C~94se 2016 03 12.61360 14 55 19.97 +00 46 48.5 24.8z 16GA399 T09 C~94se 2016 03 12.62712 14 55 19.93 +00 46 49.0 24.4z 16GA399 T09 C~94se 2016 03 12.64332 14 55 19.88 +00 46 49.3 24.5z 16GA399 T09 C~94se 2016 03 15.55566 14 55 11.62 +00 48 34.2 23.8y 16GA399 T09 C~94se 2016 03 15.57262 14 55 11.57 +00 48 34.7 23.8y 16GA399 T09 C~94se 2016 03 15.58344 14 55 11.54 +00 48 35.2 24.4y 16GA399 T09 C~94se 2016 03 15.62125 14 55 11.40 +00 48 36.9 23.9y 16GA399 T09 C~94se 2016 03 15.62394 14 55 11.38 +00 48 37.0 23.7y 16GA399 T09 C~94se 2016 04 04.57957 14 53 55.30 +01 00 32.7 25.3g 16GA399 T09 C~94se 2016 04 04.59302 14 53 55.23 +01 00 33.2 25.3g 16GA399 T09 C~94se 2016 04 04.60590 14 53 55.18 +01 00 33.5 25.2g 16GA399 T09 C~94se
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 -0.05
2 0.0000 -0.52 -0.16 0.15 -0.06
3 0.0000 -0.93 -0.26 0.44 0.09
4 0.0001 -1.74 0.24 1.03 0.04
5 0.0082 -141.37 0.10 67.78 0.15
6 0.0082 -141.51 0.10 67.73 0.04
7 0.0082 -142.24 0.06 68.03 0.05
8 0.0083 -143.04 0.08 68.09 -0.24
9 0.0163 -292.66 0.11 131.08 -0.08
10 0.0163 -293.52 0.18 131.34 -0.17
11 0.0163 -294.10 0.19 131.68 -0.05
12 0.0164 -296.61 -0.25 132.67 0.16
13 0.0165 -296.93 -0.41 132.68 0.11
14 0.0711 -1599.95 0.02 473.94 0.04
15 0.0711 -1601.10 -0.10 474.11 0.03
16 0.0712 -1601.91 0.08 474.17 -0.06
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.
16GA399 quality flag:0 Type: ERR2LARGE ERR2LARGE ERR2LARGE axisobj 0.000 0.000 0.000 ecceobj -1.000 -1.000 -1.000 incobj -1.000 -1.000 -1.000 qmin 0.000 0.000 0.000 qmax 0.000 0.000 0.000 amean 0.000 0.000 0.000 amin 0.000 0.000 0.000 amax 0.000 0.000 0.000 emean 0.000 0.000 0.000 emin 0.000 0.000 0.000 emax 0.000 0.000 0.000 imean 0.000 0.000 0.000 imin 0.000 0.000 0.000 imax 0.000 0.000 0.000 excite_mean 0.000 0.000 0.000 fracstop 0.000 0.000 0.000 cjmean 0.000 0.000 0.000 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 0.0 0.0 0.0 kozaiamp 0.0 0.0 0.0