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: 14YZ91 # Created Sun Dec 22 02:10:14 2024 # Orbit generated from Bernstein formalism # Fitting 24 observations of 24 # Arc: 3.96y # First observation: 2014/12/16 # Last observation: 2018/12/02 Preliminary a, adot, b, bdot, g, gdot: 0.000227 0.029248 0.000066 -0.005265 0.028085 0.000000 # Chi-squared of fit: 7.21 DOF: 42 RMS: 0.10 # Min/Max residuals: -0.18 0.25 # Exact a, adot, b, bdot, g, gdot: 1.691840E-05 2.955684E-02 -3.241639E-06 -5.332217E-03 2.678642E-02 4.352477E-03 # Covariance matrix: 5.2940E-13 -4.4977E-13 -7.6876E-14 7.2048E-14 -2.3792E-13 -2.8156E-12 -4.4977E-13 5.1276E-13 8.3115E-14 -9.3013E-14 2.0449E-13 3.5005E-12 -7.6876E-14 8.3115E-14 2.5022E-13 -9.8087E-14 9.4291E-14 6.8232E-13 7.2048E-14 -9.3013E-14 -9.8087E-14 5.8897E-14 -3.8389E-14 -6.8737E-13 -2.3792E-13 2.0449E-13 9.4291E-14 -3.8389E-14 4.6619E-13 1.9446E-12 -2.8156E-12 3.5005E-12 6.8232E-13 -6.8737E-13 1.9446E-12 2.6436E-11 # lat0 lon0 xBary yBary zBary JD0 -28.756912 5.401824 -0.962819 -0.096612 -0.176454 2457007.542018 # Heliocentric elements and errors Epoch: 2457000.5000 = 2014/12/09 Mean Anomaly: 27.65616 +/- 0.015 Argument of Peri: 205.42093 +/- 0.031 Long of Asc Node: 116.42299 +/- 0.001 Inclination: 30.02182 +/- 0.000 Eccentricity: 0.27066944 +/- 0.0002 Semi-Major Axis: 47.86364889 +/- 0.0070 Time of Perihelion: 2447708.7714 +/- 4.6 Perihelion: 34.90842194 +/- 0.0091 Aphelion: 60.81887585 +/- 0.0117 Period (y) 331.1440 +/- 0.07 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 32.68949980 +/- 0.0008 Ecliptic Y 4.06006615 +/- 0.0001 Ecliptic Z -17.96055311 +/- 0.0005 Ecliptic XDOT -0.00016124 +/- 0.0000 Ecliptic YDOT 0.00301449 +/- 0.0000 Ecliptic ZDOT -0.00069172 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 37.51891526 +/- 0.0008 Geocenter to KBO 37.33234785 +/- 0.0010 # Hcoef: 7.99
The following table shows the complete astrometric record for 14YZ91. 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 (14YZ91) followed by the observatory code and reference code for the source of the astrometry.
2014 12 16.04124 01 08 03.654 -24 06 53.50 23.4i 14YZ91 W84 C~55TQ 2015 01 13.06627 01 08 04.592 -23 44 46.98 24.1g 14YZ91 W84 C~55TQ 2015 11 07.25971 01 17 29.042 -23 50 23.48 23.8i 14YZ91 W84 C~55TQ 2015 11 07.26106 01 17 29.033 -23 50 23.51 23.8r 14YZ91 W84 C~55TQ 2015 11 14.16438 01 16 57.251 -23 50 14.49 24.2g 14YZ91 W84 C~55TQ 2015 11 14.20162 01 16 57.076 -23 50 14.24 23.2i 14YZ91 W84 C~55TQ 2015 11 16.10915 01 16 48.807 -23 50 02.89 23.2r 14YZ91 W84 C~55TQ 2015 11 18.18727 01 16 40.015 -23 49 46.17 23.3i 14YZ91 W84 C~55TQ 2015 12 01.04874 01 15 52.796 -23 46 24.72 23.9r 14YZ91 W84 C~55TQ 2016 10 05.23354 01 27 26.422 -23 10 15.47 23.4i 14YZ91 W84 C~55TQ 2016 10 05.23492 01 27 26.413 -23 10 15.77 24.0g 14YZ91 W84 C~55TQ 2016 11 05.25898 01 24 44.765 -23 20 34.21 23.5i 14YZ91 W84 C~55TQ 2016 11 05.26035 01 24 44.757 -23 20 34.22 23.6r 14YZ91 W84 C~55TQ 2016 12 02.05486 01 22 54.117 -23 16 33.66 23.2i 14YZ91 W84 C~55TQ 2016 12 02.05624 01 22 54.128 -23 16 33.85 23.5r 14YZ91 W84 C~55TQ 2017 09 26.26159 01 35 14.070 -22 33 17.16 23.9r 14YZ91 W84 C~55TQ 2017 11 23.20649 01 30 26.751 -22 49 00.66 24.6i 14YZ91 W84 C~55TQ 2017 12 07.05538 01 29 38.768 -22 44 36.23 24.3r 14YZ91 W84 C~55TQ 2017 12 11.11363 01 29 27.760 -22 42 43.70 24.8g 14YZ91 W84 C~55TQ 2018 09 09.40404 01 43 19.646 -21 48 13.68 23.8i 14YZ91 W84 C~55TQ 2018 09 10.24758 01 43 16.537 -21 48 54.88 23.9r 14YZ91 W84 C~55TQ 2018 09 10.24896 01 43 16.551 -21 48 54.70 24.5g 14YZ91 W84 C~55TQ 2018 12 02.08595 01 36 47.308 -22 15 40.88 23.7r 14YZ91 W84 C~55TQ 2018 12 02.08733 01 36 47.308 -22 15 40.62 24.2g 14YZ91 W84 C~55TQ
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 0.11 0.00 0.02
2 0.0767 587.16 -0.11 1189.59 -0.07
3 0.8931 7393.66 0.06 -2533.26 -0.10
4 0.8931 7393.54 0.02 -2533.23 -0.11
5 0.9120 7007.29 -0.03 -2329.38 0.05
6 0.9121 7005.25 -0.09 -2328.08 0.15
7 0.9174 6908.77 0.12 -2267.06 0.06
8 0.9231 6808.26 -0.07 -2198.04 0.17
9 0.9583 6317.99 -0.06 -1727.83 -0.09
10 1.8048 15833.30 0.09 -4149.75 0.06
11 1.8048 15833.04 -0.05 -4149.96 -0.16
12 1.8897 13559.47 0.03 -3665.95 -0.05
13 1.8897 13559.37 0.02 -3665.91 -0.05
14 1.9631 12309.82 -0.01 -2750.49 0.20
15 1.9631 12309.86 0.08 -2750.73 -0.10
16 2.7795 22643.23 -0.02 -5242.15 -0.07
17 2.9382 18650.65 -0.12 -4185.94 0.15
18 2.9761 18183.70 0.03 -3638.96 0.03
19 2.9872 18100.84 -0.03 -3467.54 0.00
20 3.7327 29978.55 -0.18 -6141.17 -0.07
21 3.7350 29919.45 -0.11 -6156.09 -0.02
22 3.7350 29919.72 0.25 -6156.03 0.06
23 3.9618 24304.71 -0.04 -4930.26 -0.10
24 3.9618 24304.83 0.13 -4930.03 0.07
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.
14YZ91 quality flag:2 Type: 2:1E SCATNEAR SCATNEAR axisobj 48.392 48.415 48.369 ecceobj 0.278 0.278 0.278 incobj 30.010 30.010 30.010 qmin 34.541 34.497 34.416 qmax 62.005 62.324 62.461 amean 47.796 47.795 47.843 amin 47.133 47.090 47.071 amax 48.607 48.652 48.674 emean 0.258 0.259 0.247 emin 0.235 0.230 0.208 emax 0.279 0.281 0.284 imean 28.781 28.577 28.989 imin 28.316 28.061 28.090 imax 29.324 29.146 29.727 excite_mean 0.546 0.544 0.544 fracstop 1.000 1.000 1.000 cjmean 2.763 2.767 2.766 libcent 0 180.7 -180.0 -180.0 libamp 0 170.9 -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 211.2 184.3 197.9 kozaiamp 180.0 180.0 180.0