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: 16AY401 # Created Mon Apr 28 01:10:45 2025 # Orbit generated from Bernstein formalism # Fitting 16 observations of 16 # Arc: 64.85d # First observation: 2015/11/08 # Last observation: 2016/01/12 Preliminary a, adot, b, bdot, g, gdot: -0.000000 0.030123 0.000001 -0.002197 0.027127 0.000000 # WARNING Fitting with energy constraint # Chi-squared of fit: 9.34 DOF: 27 RMS: 0.14 # Min/Max residuals: -0.23 0.25 # Exact a, adot, b, bdot, g, gdot: 1.740836E-05 2.887266E-02 -4.042162E-07 -2.383967E-03 2.628505E-02 1.323878E-03 # Covariance matrix: 2.9597E-13 7.8013E-12 3.0926E-15 2.5802E-12 5.2524E-12 6.5865E-10 7.8013E-12 2.2636E-08 7.3454E-12 6.7928E-09 1.1877E-08 1.3338E-06 3.0926E-15 7.3454E-12 2.9414E-13 5.0523E-13 3.8697E-12 4.3792E-10 2.5802E-12 6.7928E-09 5.0523E-13 2.3538E-09 3.2643E-09 2.8978E-07 5.2524E-12 1.1877E-08 3.8697E-12 3.2643E-09 6.5400E-09 8.1173E-07 6.5865E-10 1.3338E-06 4.3792E-10 2.8978E-07 8.1173E-07 1.1949E-04 # lat0 lon0 xBary yBary zBary JD0 -13.138909 141.538296 0.988638 0.023981 0.101896 2457335.063619 # Heliocentric elements and errors Epoch: 2457330.5000 = 2015/11/04 Mean Anomaly: 4.95064 +/- 97.382 Argument of Peri: 242.13170 +/- 141.175 Long of Asc Node: 251.27016 +/- 0.621 Inclination: 14.09413 +/- 0.057 Eccentricity: 0.17611293 +/- 0.0777 Semi-Major Axis: 46.01687887 +/- 2.0529 Time of Perihelion: 2455762.5460 +/- 30842.5 Perihelion: 37.91271147 +/- 3.9556 Aphelion: 54.12104627 +/- 4.3145 Period (y) 312.1648 +/- 20.89 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -28.31706144 +/- 0.0893 Ecliptic Y 23.75130718 +/- 0.0709 Ecliptic Z -8.64802881 +/- 0.0266 Ecliptic XDOT -0.00193291 +/- 0.0009 Ecliptic YDOT -0.00231312 +/- 0.0007 Ecliptic ZDOT -0.00027312 +/- 0.0003 # Distances at JD0 (AU) Heliocenter to KBO 37.95746255 +/- 0.0802 Geocenter to KBO 38.04443387 +/- 0.1170 # Hcoef: 8.55
The following table shows the complete astrometric record for 16AY401. 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 (16AY401) followed by the observatory code and reference code for the source of the astrometry.
2015 11 08.56283 09 18 53.48 +01 51 20.4 25.0r 16AY401 T09 C~8ndh 2015 11 08.57416 09 18 53.50 +01 51 20.3 25.2r 16AY401 T09 C~8ndh 2015 11 08.59753 09 18 53.52 +01 51 19.8 24.9r 16AY401 T09 C~8ndh 2015 11 08.61461 09 18 53.53 +01 51 18.9 24.5r 16AY401 T09 C~8ndh 2015 11 08.64630 09 18 53.58 +01 51 18.3 24.9r 16AY401 T09 C~8ndh 2016 01 09.47880 09 16 55.44 +01 39 01.0 23.9y 16AY401 T09 C~8ndh 2016 01 09.48417 09 16 55.42 +01 39 01.0 24.5y 16AY401 T09 C~8ndh 2016 01 09.50073 09 16 55.31 +01 39 01.0 23.4y 16AY401 T09 C~8ndh 2016 01 09.53104 09 16 55.19 +01 39 01.3 24.4y 16AY401 T09 C~8ndh 2016 01 09.55275 09 16 55.08 +01 39 01.5 23.8y 16AY401 T09 C~8ndh 2016 01 09.57999 09 16 54.97 +01 39 01.5 23.9y 16AY401 T09 C~8ndh 2016 01 12.36098 09 16 42.54 +01 39 24.1 23.8z 16AY401 T09 C~8ndh 2016 01 12.37254 09 16 42.49 +01 39 23.9 24.1z 16AY401 T09 C~8ndh 2016 01 12.38073 09 16 42.44 +01 39 23.9 23.8z 16AY401 T09 C~8ndh 2016 01 12.39231 09 16 42.40 +01 39 24.1 23.8z 16AY401 T09 C~8ndh 2016 01 12.40929 09 16 42.31 +01 39 24.4 23.6z 16AY401 T09 C~8ndh
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 -0.01 0.00 -0.21
2 0.0000 0.32 0.04 -0.00 0.05
3 0.0001 0.76 -0.08 -0.38 0.20
4 0.0001 1.18 -0.06 -1.19 -0.21
5 0.0002 2.08 0.10 -1.53 0.18
6 0.1695 -1451.43 0.17 -1253.94 0.14
7 0.1695 -1451.71 0.25 -1254.03 0.13
8 0.1696 -1453.28 -0.23 -1254.55 -0.15
9 0.1697 -1455.09 -0.02 -1254.82 0.01
10 0.1697 -1456.71 -0.21 -1255.15 -0.01
11 0.1698 -1458.28 0.03 -1255.66 -0.14
12 0.1774 -1642.44 -0.04 -1292.22 0.22
13 0.1774 -1643.09 0.10 -1292.64 -0.05
14 0.1775 -1643.80 -0.05 -1292.88 -0.18
15 0.1775 -1644.44 0.11 -1292.87 -0.03
16 0.1775 -1645.81 -0.10 -1293.01 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.
16AY401 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