Orbit Fit and Astrometric record for 15VR167

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: 15VR167   
# Created Sun Apr 21 01:10:13 2019
# Orbit generated from Bernstein formalism
# Fitting   32 observations of   33
# Arc:   2.35y
# First observation: 2015/08/11
#  Last observation: 2017/12/16
Preliminary a, adot, b, bdot, g, gdot:
  -0.000023   0.021570  -0.000041   0.005512   0.022553   0.000000
# Chi-squared of fit:    13.06 DOF:   58 RMS:  0.11
# Min/Max residuals:    -0.41    0.32
# Exact a, adot, b, bdot, g, gdot:
  1.602687E-05  2.091910E-02  3.808391E-06  5.290077E-03  2.204345E-02 -1.027330E-02
# Covariance matrix:
  1.9024E-13  9.2609E-15 -4.9329E-15  2.6157E-14  1.3692E-13  2.1964E-12
  9.2609E-15  2.9947E-13 -2.4741E-14  9.9059E-14  2.0303E-13  8.2058E-12
 -4.9329E-15 -2.4741E-14  9.9049E-14 -7.3816E-14 -1.9328E-14 -9.2157E-13
  2.6157E-14  9.9059E-14 -7.3816E-14  1.1885E-13  8.3875E-14  3.6509E-12
  1.3692E-13  2.0303E-13 -1.9328E-14  8.3875E-14  2.5629E-13  6.9780E-12
  2.1964E-12  8.2058E-12 -9.2157E-13  3.6509E-12  6.9780E-12  3.0226E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.560574   52.049436    1.013968    0.001826    0.062563  2457246.064839
# Heliocentric elements and errors
Epoch:              2457240.5000  =  2015/08/06
Mean Anomaly:          333.81023 +/-     0.055
Argument of Peri:       75.87065 +/-     0.016
Long of Asc Node:       56.86636 +/-     0.000
Inclination:            14.40374 +/-     0.001
Eccentricity:         0.54868281 +/-    0.0009
Semi-Major Axis:     69.67811834 +/-    0.0947
Time of Perihelion: 2472695.6170 +/-       7.7
Perihelion:          31.44693250 +/-    0.0742
Aphelion:           107.90930417 +/-    0.1588
Period (y)              581.6381 +/-      1.19
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           28.64521530 +/-    0.0007
Ecliptic Y           35.08594058 +/-    0.0008
Ecliptic Z           -1.23525291 +/-    0.0000
Ecliptic XDOT        -0.00282425 +/-    0.0000
Ecliptic YDOT         0.00059983 +/-    0.0000
Ecliptic ZDOT         0.00069160 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   45.31111824 +/-    0.0008
Geocenter to KBO     45.36493985 +/-    0.0010
# Hcoef:  8.35

The following table shows the complete astrometric record for 15VR167. 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 (15VR167) followed by the observatory code and reference code for the source of the astrometry.

2015 08  11.56405  03 20 12.953  +16 46 18.57  24.6w 15VR167   568  C~2lVj      
2015 09  07.63311  03 20 09.527  +16 46 32.37  25.1w 15VR167   568  C~2lVj      
2015 09  12.50083  03 20 02.211  +16 46 09.74  24.9w 15VR167   568  C~2lVj      
2015 10  07.54436  03 18 55.635  +16 42 32.95  25.1w 15VR167   568  C~2lVj      
2015 10  07.60373  03 18 55.419  +16 42 32.26  25.0w 15VR167   568  C~2lVj      
2015 10  09.58362  03 18 48.349  +16 42 08.91  24.8w 15VR167   568  C~2lVj      
2015 11  07.33788  03 16 46.215  +16 35 27.62  24.6r 15VR167   568  C~2lVj      
2015 11  07.38006  03 16 46.025  +16 35 27.10  24.9r 15VR167   568  C~2lVj      
2015 11  07.42224  03 16 45.806  +16 35 26.37  24.6r 15VR167   568  C~2lVj      
2015 11  10.50536  03 16 31.400  +16 34 39.74  24.8w 15VR167   568  C~2lVj      
2015 11  17.35218  03 15 59.259  +16 32 56.94  25.1w 15VR167   568  C~2lVj      
2015 11  17.39878  03 15 59.043  +16 32 56.25  24.9w 15VR167   568  C~2lVj      
2015 12  06.36096  03 14 33.066  +16 28 30.84  25.0w 15VR167   568  C~2lVj      
2015 12  06.49848  03 14 32.495  +16 28 28.65  24.7w 15VR167   568  C~2lVj      
2016 01  01.34872  03 12 59.175  +16 24 16.87  24.9w 15VR167   568  C~2lVj      
2016 01  07.41130  03 12 43.591  +16 23 44.89  25.4w 15VR167   568  C~2lVj      
2016 01  07.42868  03 12 43.617  +16 23 44.68  25.0w 15VR167   568  C~2lVj      
2016 01  08.25624  03 12 41.697  +16 23 41.36  25.4w 15VR167   568  C~2lVj      
2016 02  05.28768  03 12 12.414  +16 24 08.14  25.0w 15VR167   568  C~2lVj      
2016 02  10.30807  03 12 14.718  +16 24 43.40  25.2w 15VR167   568  C~2lVj      
2016 09  07.62568  03 24 45.963  +17 23 00.53        15VR167   568  C~2lVj      
2016 09  26.58416  03 24 06.858  +17 21 08.40  25.1w 15VR167   568  C~2lVj      
2016 10  09.54522  03 23 24.781  +17 18 58.73  24.9w 15VR167   568  C~2lVj      
2016 10  09.61729  03 23 24.514  +17 18 57.68  24.9w 15VR167   568  C~2lVj      
2016 12  24.31334  03 17 55.464  +17 02 26.10  24.8w 15VR167   568  C~2lVj      
2017 01  02.41556  03 17 27.167  +17 01 18.04  25.4w 15VR167   568  C~2lVj      
2017 01  26.32908  03 16 44.469  +17 00 25.65  24.6w 15VR167   568  C~2lVj      
2017 01  27.28684  03 16 43.816  +17 00 27.74  25.2w 15VR167   568  C~2lVj      
2017 09  15.58856  03 29 19.252  +17 59 26.82  24.8w 15VR167   568  C~2lVj      
2017 09  22.57478  03 29 04.289  +17 58 48.47  25.3w 15VR167   568  C~2lVj      
2017 12  13.39064  03 23 20.608  +17 42 04.10  24.4w 15VR167   568  C~2lVj      
2017 12  13.42791  03 23 20.451  +17 42 03.45  24.8w 15VR167   568  C~2lVj      
2017 12  16.34929  03 23 08.478  +17 41 30.58  25.1w 15VR167   568  C~2lVj      

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    -0.21       0.00    -0.00
  2   0.0741    -44.04    -0.02      25.91     0.32
  3   0.0874   -151.41     0.03      30.90    -0.05
  4   0.1560  -1131.36     0.04      66.54    -0.06
  5   0.1562  -1134.54     0.01      66.67    -0.04
  6   0.1616  -1238.70     0.06      70.23    -0.01
  7   0.2403  -3038.22     0.09     136.19    -0.03
  8   0.2404  -3040.99     0.24     136.40     0.05
  9   0.2405  -3044.22    -0.05     136.51     0.02
 10   0.2490  -3256.37     0.00     145.29    -0.09
 11   0.2677  -3729.45    -0.05     166.32     0.02
 12   0.2679  -3732.63     0.04     166.47    -0.01
 13   0.3198  -4996.05    -0.08     233.61     0.10
 14   0.3201  -5004.55     0.18     233.65    -0.41
 15   0.3909  -6367.09     0.01     344.28     0.02
 16   0.4075  -6592.04    -0.32     372.73     0.19
 17   0.4076  -6591.74 (   0.59)    372.43 (  -0.20)
 18   0.4098  -6619.29     0.16     376.54     0.02
 19   0.4866  -7018.97     0.04     514.05    -0.02
 20   0.5003  -6977.61    -0.18     539.27     0.16
 21   1.0761   4344.62     0.11    1141.50    -0.03
 22   1.1280   3774.31    -0.07    1173.02    -0.04
 23   1.1635   3158.38    -0.04    1198.76    -0.00
 24   1.1637   3154.42    -0.06    1198.71    -0.22
 25   1.3710  -1658.49    -0.00    1442.02    -0.04
 26   1.3959  -2068.17    -0.00    1481.24     0.02
 27   1.4614  -2673.35     0.04    1589.49    -0.01
 28   1.4640  -2681.85     0.03    1593.95     0.02
 29   2.0973   8673.87    -0.06    2296.89    -0.02
 30   2.1164   8457.10     0.03    2311.79     0.12
 31   2.3404   3449.30     0.05    2554.91     0.15
 32   2.3405   3446.96     0.02    2554.84    -0.07
 33   2.3485   3273.04    -0.05    2566.09    -0.05

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.

15VR167    quality flag:3

Type:       7:2EEEEE  7:2EEEEE  7:2EEEEE

axisobj        70.283    70.542    70.027
ecceobj         0.548     0.550     0.545
incobj         14.347    14.347    14.347
qmin           30.732    30.802    30.767
qmax          110.581   111.071   110.580
amean          69.408    69.409    69.408
amin           68.304    68.123    68.297
amax           71.026    71.241    71.070
emean           0.547     0.546     0.546
emin            0.536     0.535     0.535
emax            0.558     0.559     0.557
imean          13.148    13.435    13.142
imin           12.822    13.052    12.761
imax           13.502    13.746    13.503
excite_mean     0.592     0.594     0.591
fracstop        1.000     1.000     1.000
cjmean          2.910     2.908     2.911

libcent 0       179.5     180.0     179.8
libamp  0        84.3     154.4      89.0
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       162.2     177.9     165.9
kozaiamp         90.1     180.0      94.2