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: 16QD135 # Created Sun Dec 22 02:10:45 2024 # Orbit generated from Bernstein formalism # Fitting 18 observations of 18 # Arc: 2.21y # First observation: 2016/08/31 # Last observation: 2018/11/15 Preliminary a, adot, b, bdot, g, gdot: 0.000001 0.024209 0.000006 -0.007853 0.024618 0.000000 # Chi-squared of fit: 5.05 DOF: 30 RMS: 0.09 # Min/Max residuals: -0.13 0.22 # Exact a, adot, b, bdot, g, gdot: 1.589851E-05 2.425718E-02 -5.281780E-06 -7.879841E-03 2.466218E-02 1.871997E-03 # Covariance matrix: 3.6841E-13 1.3374E-13 5.2476E-15 -7.7114E-14 4.1508E-13 4.4623E-12 1.3374E-13 9.1876E-13 5.2314E-14 -3.3946E-13 8.4396E-13 2.0789E-11 5.2476E-15 5.2314E-14 1.8854E-13 -1.3525E-13 3.9875E-14 1.5461E-12 -7.7114E-14 -3.3946E-13 -1.3525E-13 2.7044E-13 -3.2043E-13 -9.2909E-12 4.1508E-13 8.4396E-13 3.9875E-14 -3.2043E-13 1.1166E-12 1.9251E-11 4.4623E-12 2.0789E-11 1.5461E-12 -9.2909E-12 1.9251E-11 5.7348E-10 # lat0 lon0 xBary yBary zBary JD0 -21.290212 6.901401 0.484752 -0.322254 -0.827422 2457631.744859 # Heliocentric elements and errors Epoch: 2457630.5000 = 2016/08/30 Mean Anomaly: 22.69085 +/- 0.278 Argument of Peri: 200.71026 +/- 0.385 Long of Asc Node: 139.10100 +/- 0.002 Inclination: 27.47198 +/- 0.001 Eccentricity: 0.13546925 +/- 0.0005 Semi-Major Axis: 47.10580325 +/- 0.0077 Time of Perihelion: 2450187.3245 +/- 91.2 Perihelion: 40.72441532 +/- 0.0257 Aphelion: 53.48719117 +/- 0.0263 Period (y) 323.3105 +/- 0.08 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 38.44288253 +/- 0.0016 Ecliptic Y 4.16275351 +/- 0.0002 Ecliptic Z -14.72283301 +/- 0.0006 Ecliptic XDOT -0.00044508 +/- 0.0000 Ecliptic YDOT 0.00265153 +/- 0.0000 Ecliptic ZDOT -0.00089056 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 41.37566370 +/- 0.0015 Geocenter to KBO 40.54791262 +/- 0.0017 # Hcoef: 7.08
The following table shows the complete astrometric record for 16QD135. 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 (16QD135) followed by the observatory code and reference code for the source of the astrometry.
2016 08 31.24407 00 59 50.260 -16 46 25.92 23.2r 16QD135 W84 C~55Zd 2016 08 31.24639 00 59 50.250 -16 46 25.92 22.8i 16QD135 W84 C~55Zd 2016 08 31.24776 00 59 50.255 -16 46 26.22 23.9g 16QD135 W84 C~55Zd 2016 09 03.22440 00 59 39.783 -16 48 34.95 23.0z 16QD135 W84 C~55Zd 2016 10 27.13397 00 55 43.466 -17 17 37.66 23.4i 16QD135 W84 C~55Zd 2016 10 27.13534 00 55 43.450 -17 17 37.53 23.3r 16QD135 W84 C~55Zd 2016 10 27.13673 00 55 43.462 -17 17 37.41 23.6g 16QD135 W84 C~55Zd 2016 11 07.12473 00 54 58.112 -17 19 48.92 23.0z 16QD135 W84 C~55Zd 2017 11 18.14800 01 00 21.749 -17 11 02.30 22.8i 16QD135 W84 C~55Zd 2017 11 18.14937 01 00 21.747 -17 11 02.29 24.1g 16QD135 W84 C~55Zd 2017 11 22.18774 01 00 08.781 -17 10 53.12 23.1r 16QD135 W84 C~55Zd 2017 11 26.07878 00 59 57.373 -17 10 32.06 23.1z 16QD135 W84 C~55Zd 2017 11 27.04262 00 59 54.719 -17 10 24.91 23.1i 16QD135 W84 C~55Zd 2017 12 08.05399 00 59 29.612 -17 08 10.46 23.2r 16QD135 W84 C~55Zd 2018 10 18.29039 01 08 31.992 -16 54 35.36 23.2r 16QD135 W84 C~55Zd 2018 10 18.29174 01 08 31.994 -16 54 35.23 24.3g 16QD135 W84 C~55Zd 2018 10 20.07305 01 08 23.798 -16 55 17.13 22.2z 16QD135 W84 C~55Zd 2018 11 15.20378 01 06 33.735 -17 00 56.18 23.2i 16QD135 W84 C~55Zd
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 -0.07 0.00 0.05
2 0.0000 -0.13 -0.05 0.06 0.15
3 0.0000 -0.19 -0.02 -0.24 -0.13
4 0.0082 -190.27 0.15 -55.51 -0.13
5 0.1558 -3996.25 -0.01 -255.76 -0.09
6 0.1558 -3996.41 -0.08 -255.55 0.11
7 0.1558 -3996.20 0.22 -255.51 0.13
8 0.1858 -4643.19 -0.13 -111.14 -0.11
9 1.2153 -197.90 -0.04 -1531.24 0.09
10 1.2153 -197.93 -0.00 -1531.22 0.08
11 1.2264 -363.37 0.13 -1446.14 0.13
12 1.2371 -503.60 -0.01 -1359.48 -0.11
13 1.2397 -535.30 -0.05 -1337.28 -0.13
14 1.2698 -807.71 -0.02 -1066.42 -0.01
15 2.1302 6605.05 -0.07 -3573.06 -0.05
16 2.1302 6605.13 0.11 -3572.95 0.05
17 2.1351 6480.68 -0.07 -3561.21 -0.03
18 2.2066 4904.22 0.02 -3202.95 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.
16QD135 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 47.669 47.698 47.640 ecceobj 0.145 0.146 0.144 incobj 27.425 27.425 27.424 qmin 39.556 39.504 39.669 qmax 55.679 55.847 55.444 amean 47.406 47.436 47.370 amin 47.005 47.034 46.960 amax 47.881 47.896 47.813 emean 0.145 0.147 0.143 emin 0.130 0.131 0.127 emax 0.163 0.166 0.160 imean 26.049 26.040 26.055 imin 25.680 25.674 25.693 imax 26.369 26.356 26.380 excite_mean 0.463 0.463 0.462 fracstop 1.000 1.000 1.000 cjmean 2.866 2.865 2.866 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 195.1 197.0 192.4 kozaiamp 180.0 180.0 180.0