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: 15DB225
# Created Fri Apr 26 01:17:02 2024
# Orbit generated from Bernstein formalism
# Fitting 11 observations of 11
# Arc: 56.07d
# First observation: 2015/02/18
# Last observation: 2015/04/15
Preliminary a, adot, b, bdot, g, gdot:
-0.000001 0.030085 -0.000003 0.000368 0.024662 0.000000
# WARNING Fitting with energy constraint
# Chi-squared of fit: 15.46 DOF: 17 RMS: 0.21
# Min/Max residuals: -0.61 0.37
# Exact a, adot, b, bdot, g, gdot:
1.461080E-05 2.163424E-02 1.764930E-07 2.100004E-04 2.335262E-02 1.083382E-02
# Covariance matrix:
6.0373E-13 1.7476E-10 -7.0258E-14 3.3299E-12 2.6391E-11 -1.7533E-09
1.7476E-10 2.7126E-07 -1.0868E-10 5.0889E-09 3.8694E-08 -3.1894E-06
-7.0258E-14 -1.0868E-10 4.3284E-13 -5.2924E-12 -1.5495E-11 1.2818E-09
3.3299E-12 5.0889E-09 -5.2924E-12 1.3703E-10 7.2592E-10 -5.9879E-08
2.6391E-11 3.8694E-08 -1.5495E-11 7.2592E-10 5.5305E-09 -4.5156E-07
-1.7533E-09 -3.1894E-06 1.2818E-09 -5.9879E-08 -4.5156E-07 3.8690E-05
# lat0 lon0 xBary yBary zBary JD0
2.802054 155.051785 0.103833 0.048053 -0.978769 2457071.772568
# Heliocentric elements and errors
Epoch: 2457070.5000 = 2015/02/17
Mean Anomaly: 40.74930 +/- 20.672
Argument of Peri: 342.95395 +/- 1.780
Long of Asc Node: 77.13532 +/- 0.363
Inclination: 2.80258 +/- 0.004
Eccentricity: 0.47852889 +/- 0.2704
Semi-Major Axis: 54.51831583 +/- 16.4694
Time of Perihelion: 2440427.5706 +/- 3796.2
Perihelion: 28.42972682 +/- 17.0604
Aphelion: 80.60690485 +/- 28.4647
Period (y) 402.5519 +/- 182.41
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -39.62760990 +/- 0.1235
Ecliptic Y 18.54808810 +/- 0.0575
Ecliptic Z 2.09336800 +/- 0.0067
Ecliptic XDOT -0.00222266 +/- 0.0006
Ecliptic YDOT -0.00177069 +/- 0.0004
Ecliptic ZDOT 0.00008678 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 43.80366684 +/- 0.1143
Geocenter to KBO 42.82175492 +/- 0.1364
# Hcoef: 7.47
The following table shows the complete astrometric record for 15DB225. 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 (15DB225) followed by the observatory code and reference code for the source of the astrometry.
2015 02 18.27179 10 31 44.39 +12 15 53.9 23.3R 15DB225 695 C~1zPy 2015 02 18.36258 10 31 43.98 +12 15 56.3 15DB225 695 C~1zPy 2015 02 18.45491 10 31 43.55 +12 15 58.8 15DB225 695 C~1zPy 2015 03 16.15381 10 29 49.15 +12 26 53.3 23.8R 15DB225 G37 C~1zPy 2015 03 16.22217 10 29 48.94 +12 26 55.3 15DB225 G37 C~1zPy 2015 03 23.14543 10 29 20.51 +12 29 28.7 23.6R 15DB225 695 C~1zPy 2015 03 23.21118 10 29 20.23 +12 29 30.1 15DB225 695 C~1zPy 2015 03 23.27204 10 29 20.00 +12 29 31.4 15DB225 695 C~1zPy 2015 04 15.19178 10 28 02.88 +12 35 59.3 23.5R 15DB225 695 C~1zPy 2015 04 15.27027 10 28 02.67 +12 36 00.2 15DB225 695 C~1zPy 2015 04 15.34305 10 28 02.47 +12 36 01.0 15DB225 695 C~1zPy
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 -0.01
2 0.0002 -6.47 0.08 0.01 -0.01
3 0.0005 -13.25 -0.06 0.01 -0.03
4 0.0709 -1812.77 -0.61 -8.75 -0.46
5 0.0710 -1816.36 0.37 -8.03 0.37
6 0.0900 -2260.04 0.14 -18.24 0.10
7 0.0902 -2264.36 -0.06 -18.45 0.02
8 0.0903 -2267.98 0.15 -18.47 0.12
9 0.1531 -3460.99 -0.06 -71.32 0.01
10 0.1533 -3464.18 0.02 -71.61 -0.01
11 0.1535 -3467.20 0.01 -71.93 -0.10
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.
15DB225 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