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: 16SU56 # Created Tue Apr 1 01:10:58 2025 # Orbit generated from Bernstein formalism # Fitting 16 observations of 16 # Arc: 1.98y # First observation: 2015/12/17 # Last observation: 2017/12/11 Preliminary a, adot, b, bdot, g, gdot: -0.000298 0.028363 -0.000028 0.006335 0.025642 0.000000 # Chi-squared of fit: 8.53 DOF: 26 RMS: 0.13 # Min/Max residuals: -0.25 0.24 # Exact a, adot, b, bdot, g, gdot: 1.735429E-05 2.769475E-02 4.472874E-06 6.215438E-03 2.525710E-02 -5.159002E-03 # Covariance matrix: 1.4125E-12 -1.9301E-12 1.0920E-13 -2.7808E-13 -6.1827E-13 -2.0418E-11 -1.9301E-12 4.0190E-12 -3.0340E-13 6.5817E-13 7.2086E-13 4.9194E-11 1.0920E-13 -3.0340E-13 4.6238E-13 -3.6199E-13 -3.3602E-14 -4.0573E-12 -2.7808E-13 6.5817E-13 -3.6199E-13 3.8973E-13 1.1889E-13 8.6682E-12 -6.1827E-13 7.2086E-13 -3.3602E-14 1.1889E-13 4.8062E-13 8.4769E-12 -2.0418E-11 4.9194E-11 -4.0573E-12 8.6682E-12 8.4769E-12 6.4908E-10 # lat0 lon0 xBary yBary zBary JD0 -14.464879 29.129536 -0.810276 -0.140027 -0.543735 2457373.627409 # Heliocentric elements and errors Epoch: 2457370.5000 = 2015/12/14 Mean Anomaly: 343.50012 +/- 0.063 Argument of Peri: 347.30831 +/- 0.158 Long of Asc Node: 77.32436 +/- 0.002 Inclination: 19.16685 +/- 0.001 Eccentricity: 0.35642347 +/- 0.0006 Semi-Major Axis: 59.25318539 +/- 0.0285 Time of Perihelion: 2465006.1182 +/- 28.8 Perihelion: 38.13395937 +/- 0.0410 Aphelion: 80.37241142 +/- 0.0532 Period (y) 456.1165 +/- 0.33 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 33.58087236 +/- 0.0009 Ecliptic Y 19.64271292 +/- 0.0005 Ecliptic Z -9.88965037 +/- 0.0003 Ecliptic XDOT -0.00178840 +/- 0.0000 Ecliptic YDOT 0.00243387 +/- 0.0000 Ecliptic ZDOT 0.00079211 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 40.14120506 +/- 0.0008 Geocenter to KBO 39.59282336 +/- 0.0011 # Hcoef: 7.85
The following table shows the complete astrometric record for 16SU56. 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 (16SU56) followed by the observatory code and reference code for the source of the astrometry.
2015 12 17.12662 02 08 38.341 -02 23 19.68 23.8i 16SU56 W84 C~55Zx 2016 09 10.30630 02 20 50.440 -01 03 04.15 24.0r 16SU56 W84 C~55Zx 2016 09 24.26450 02 20 04.409 -01 09 31.06 23.5r 16SU56 W84 C~55Zx 2016 09 27.46348 02 19 52.12 -01 11 00.1 24.5g 16SU56 568 C~2eAI 2016 09 27.52408 02 19 51.87 -01 11 01.8 24.3g 16SU56 568 C~2eAI 2016 09 28.47270 02 19 48.12 -01 11 28.1 24.6g 16SU56 568 C~2eAI 2016 09 29.59118 02 19 43.62 -01 11 59.0 24.5g 16SU56 568 C~2eAI 2016 10 27.21542 02 17 37.795 -01 23 27.31 23.8r 16SU56 W84 C~55Zx 2016 11 29.17841 02 15 06.423 -01 30 30.97 23.7r 16SU56 W84 C~55Zx 2016 12 05.17833 02 14 43.382 -01 30 41.28 23.3i 16SU56 W84 C~55Zx 2016 12 05.17971 02 14 43.394 -01 30 41.28 24.0g 16SU56 W84 C~55Zx 2017 10 29.26760 02 23 04.030 -00 29 35.43 23.9r 16SU56 W84 C~55Zx 2017 10 29.26898 02 23 04.036 -00 29 35.28 23.6i 16SU56 W84 C~55Zx 2017 10 29.27036 02 23 04.036 -00 29 35.67 24.1g 16SU56 W84 C~55Zx 2017 11 27.19986 02 20 48.699 -00 36 07.63 23.3i 16SU56 W84 C~55Zx 2017 12 11.04046 02 19 55.614 -00 36 28.52 24.2r 16SU56 W84 C~55Zx
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 -0.00 0.00 -0.12
2 0.7342 11979.95 0.07 687.70 -0.18
3 0.7725 11195.48 -0.08 565.99 -0.00
4 0.7812 10991.10 0.03 546.87 0.18
5 0.7814 10986.98 -0.06 546.59 0.19
6 0.7840 10924.92 0.01 541.57 0.16
7 0.7870 10850.69 0.08 536.17 0.15
8 0.8627 8837.62 -0.18 549.74 -0.25
9 0.9529 6559.38 -0.11 944.61 0.06
10 0.9693 6231.66 -0.00 1055.43 -0.03
11 0.9693 6231.83 0.24 1055.37 -0.12
12 1.8676 14570.02 -0.11 1873.13 0.09
13 1.8676 14570.16 0.13 1873.24 0.19
14 1.8676 14570.02 0.10 1872.87 -0.18
15 1.9468 12522.16 -0.04 2214.48 -0.18
16 1.9847 11766.14 -0.08 2473.03 0.03
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.
16SU56 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 60.242 60.300 60.184 ecceobj 0.365 0.366 0.364 incobj 19.148 19.148 19.148 qmin 36.810 36.782 36.861 qmax 83.276 83.447 83.174 amean 59.511 59.591 59.469 amin 58.822 58.905 58.758 amax 60.391 60.432 60.322 emean 0.365 0.367 0.364 emin 0.350 0.351 0.349 emax 0.380 0.381 0.379 imean 17.218 17.246 17.215 imin 16.744 16.789 16.754 imax 17.918 17.920 17.912 excite_mean 0.470 0.472 0.469 fracstop 1.000 1.000 1.000 cjmean 3.006 3.005 3.006 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 169.4 167.9 170.1 kozaiamp 180.0 180.0 180.0