Orbit Fit and Astrometric record for 15QV33

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: 15QV33    
# Created Wed Dec  8 02:13:28 2021
# Orbit generated from Bernstein formalism
# Fitting      8 observations of      8
# Arc:   4.16y
# First observation: 2014/10/03
#  Last observation: 2018/11/30
Preliminary a, adot, b, bdot, g, gdot:
  -0.000254   0.029762   0.000088  -0.010162   0.027192   0.000000
# Chi-squared of fit:     3.09 DOF:     10 RMS:  0.11
# Min/Max residuals:    -0.16    0.20
# Exact a, adot, b, bdot, g, gdot:
  1.778302E-05  2.948388E-02 -5.683710E-06 -1.004911E-02  2.710130E-02 -3.994189E-03
# Covariance matrix:
  1.0241E-12 -1.0942E-12 -1.9579E-13  3.3674E-13 -4.4413E-13 -8.0485E-12
 -1.0942E-12  1.7978E-12  3.4226E-13 -6.0544E-13  1.0655E-12  1.4280E-11
 -1.9579E-13  3.4226E-13  5.8801E-13 -3.0737E-13  1.3692E-13  3.0916E-12
  3.3674E-13 -6.0544E-13 -3.0737E-13  3.1884E-13 -3.0647E-13 -5.2884E-12
 -4.4413E-13  1.0655E-12  1.3692E-13 -3.0647E-13  1.5325E-12  6.5176E-12
 -8.0485E-12  1.4280E-11  3.0916E-12 -5.2884E-12  6.5176E-12  1.2673E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
  -16.696461   19.338394    0.168389   -0.283883   -0.947025  2456933.763058
# Heliocentric elements and errors
Epoch:              2456930.5000  =  2014/09/30
Mean Anomaly:          343.01690 +/-     0.035
Argument of Peri:      255.36522 +/-     0.074
Long of Asc Node:      159.78137 +/-     0.001
Inclination:            24.73792 +/-     0.000
Eccentricity:         0.31417998 +/-    0.0003
Semi-Major Axis:     53.01066674 +/-    0.0143
Time of Perihelion: 2463581.0519 +/-      13.3
Perihelion:          36.35577665 +/-    0.0166
Aphelion:            69.66555682 +/-    0.0230
Period (y)              385.9696 +/-      0.16
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           34.33479714 +/-    0.0015
Ecliptic Y           11.87410989 +/-    0.0005
Ecliptic Z          -10.60125760 +/-    0.0005
Ecliptic XDOT        -0.00163082 +/-    0.0000
Ecliptic YDOT         0.00258127 +/-    0.0000
Ecliptic ZDOT        -0.00085635 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.84520369 +/-    0.0014
Geocenter to KBO     36.89860014 +/-    0.0017
# Hcoef:  8.16

The following table shows the complete astrometric record for 15QV33. 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 (15QV33) followed by the observatory code and reference code for the source of the astrometry.

2014 10  03.26228  01 36 36.744  -07 53 55.85  23.4i 15QV33    W84  C~55Wc      
2015 08  18.40912  01 46 20.830  -07 15 13.62  24.0r 15QV33    W84  C~55Wc      
2015 10  17.18514  01 42 44.333  -07 55 40.59  24.0r 15QV33    W84  C~55Wc      
2015 11  15.18103  01 40 27.035  -08 07 47.26  23.1i 15QV33    W84  C~55Wc      
2015 11  15.18241  01 40 27.041  -08 07 47.13  24.3r 15QV33    W84  C~55Wc      
2017 11  16.12483  01 54 51.659  -07 54 06.86  24.0r 15QV33    W84  C~55Wc      
2017 12  22.11777  01 52 51.852  -07 54 38.71  23.5r 15QV33    W84  C~55Wc      
2018 11  30.11232  02 01 13.526  -07 48 37.02  24.3r 15QV33    W84  C~55Wc      

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    -0.12       0.00    -0.04
     2   0.8738   8919.41     0.02   -1167.92     0.18
     3   1.0374   5011.54     0.01   -2176.11     0.08
     4   1.1168   2848.36    -0.02   -2069.09    -0.16
     5   1.1168   2848.49     0.20   -2069.01    -0.09
     6   3.1208  15047.61    -0.09   -6269.83    -0.10
     7   3.2193  13385.83    -0.07   -5603.89     0.18
     8   4.1584  20445.72     0.07   -8201.15    -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.

15QV33    quality flag:3

Type:        7:3EEEE   7:3EEEE   7:3EEEE

axisobj        53.568    53.604    53.533
ecceobj         0.320     0.320     0.319
incobj         24.663    24.664    24.663
qmin           32.421    33.492    32.010
qmax           74.724    73.208    74.745
amean          52.968    52.968    52.969
amin           52.343    52.331    52.377
amax           53.818    53.742    53.751
emean           0.339     0.329     0.316
emin            0.279     0.294     0.253
emax            0.388     0.366     0.394
imean          22.245    22.889    23.317
imin           19.873    21.204    19.357
imax           24.910    24.257    25.708
excite_mean     0.510     0.510     0.509
fracstop        1.000     1.000     1.000
cjmean          2.876     2.875     2.876

libcent 0       180.8     180.9     175.3
libamp  0        97.0     119.1      96.1
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       230.6     183.1     284.9
kozaiamp        179.9     180.0      39.4