Orbit Fit and Astrometric record for 15VM167

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: 15VM167   
# Created Wed Feb 20 02:10:39 2019
# Orbit generated from Bernstein formalism
# Fitting   25 observations of   25
# Arc:   2.27y
# First observation: 2015/09/07
#  Last observation: 2017/12/16
Preliminary a, adot, b, bdot, g, gdot:
  -0.000262   0.042260  -0.000017  -0.002761   0.034014   0.000000
# Chi-squared of fit:     3.60 DOF:   44 RMS:  0.07
# Min/Max residuals:    -0.14    0.14
# Exact a, adot, b, bdot, g, gdot:
  1.962461E-05  4.211196E-02 -1.340768E-06 -2.769273E-03  3.404375E-02  5.710069E-03
# Covariance matrix:
  2.3620E-13  7.8000E-14  6.1758E-15 -1.3791E-14  2.2309E-13  2.1552E-12
  7.8000E-14  7.8399E-13  2.1822E-14 -6.4152E-14  5.7898E-13  1.0260E-11
  6.1758E-15  2.1822E-14  1.3739E-13 -8.8278E-14  1.9702E-14  3.2006E-13
 -1.3791E-14 -6.4152E-14 -8.8278E-14  1.0054E-13 -5.1766E-14 -9.6179E-13
  2.2309E-13  5.7898E-13  1.9702E-14 -5.1766E-14  6.0625E-13  8.2077E-12
  2.1552E-12  1.0260E-11  3.2006E-13 -9.6179E-13  8.2077E-12  1.5406E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.120048   49.176518    0.914171   -0.015838   -0.431676  2457273.037699
# Heliocentric elements and errors
Epoch:              2457270.5000  =  2015/09/05
Mean Anomaly:           23.46405 +/-     0.045
Argument of Peri:      173.05617 +/-     0.077
Long of Asc Node:      198.81424 +/-     0.003
Inclination:             4.35531 +/-     0.000
Eccentricity:         0.20571484 +/-    0.0002
Semi-Major Axis:     36.34054750 +/-    0.0032
Time of Perihelion: 2452055.1187 +/-      10.0
Perihelion:          28.86475766 +/-    0.0077
Aphelion:            43.81633735 +/-    0.0082
Period (y)              219.0763 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           20.15967960 +/-    0.0004
Ecliptic Y           21.94186695 +/-    0.0005
Ecliptic Z           -1.08666707 +/-    0.0000
Ecliptic XDOT        -0.00227007 +/-    0.0000
Ecliptic YDOT         0.00254860 +/-    0.0000
Ecliptic ZDOT        -0.00023949 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   29.81675791 +/-    0.0005
Geocenter to KBO     29.37396839 +/-    0.0007
# Hcoef:  9.94

The following table shows the complete astrometric record for 15VM167. 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 (15VM167) followed by the observatory code and reference code for the source of the astrometry.

2015 09  07.53691  03 09 17.488  +15 28 39.44  24.8w 15VM167   568  C~2lVj      
2015 09  12.53366  03 09 06.849  +15 27 27.93  24.9w 15VM167   568  C~2lVj      
2015 10  07.47747  03 07 31.417  +15 18 53.58  24.6w 15VM167   568  C~2lVj      
2015 10  08.48165  03 07 26.293  +15 18 28.33  24.7w 15VM167   568  C~2lVj      
2015 11  06.29678  03 04 32.705  +15 05 00.53  24.4r 15VM167   568  C~2lVj      
2015 11  06.36009  03 04 32.266  +15 04 58.85  24.3r 15VM167   568  C~2lVj      
2015 11  06.43072  03 04 31.795  +15 04 56.79  24.5r 15VM167   568  C~2lVj      
2015 11  06.50005  03 04 31.347  +15 04 54.66  24.4r 15VM167   568  C~2lVj      
2015 11  07.51946  03 04 24.629  +15 04 24.77  24.4w 15VM167   568  C~2lVj      
2015 11  17.28542  03 03 20.307  +14 59 42.09  24.4w 15VM167   568  C~2lVj      
2015 11  17.33469  03 03 19.980  +14 59 40.69  24.7w 15VM167   568  C~2lVj      
2016 09  06.59240  03 19 04.661  +15 57 34.45        15VM167   568  C~2lVj      
2016 09  26.58845  03 18 10.258  +15 52 11.15  25.1w 15VM167   568  C~2lVj      
2016 11  02.54892  03 14 49.762  +15 36 43.70  24.6w 15VM167   568  C~2lVj      
2016 11  04.42405  03 14 37.579  +15 35 51.37  25.0w 15VM167   568  C~2lVj      
2016 12  28.40571  03 09 22.044  +15 14 57.45  25.2w 15VM167   568  C~2lVj      
2016 12  29.36323  03 09 18.313  +15 14 44.32  25.0w 15VM167   568  C~2lVj      
2017 01  01.26044  03 09 07.635  +15 14 08.02  25.3w 15VM167   568  C~2lVj      
2017 01  02.37026  03 09 03.790  +15 13 55.25  25.0w 15VM167   568  C~2lVj      
2017 01  26.26424  03 08 18.502  +15 12 03.19  24.9w 15VM167   568  C~2lVj      
2017 09  16.63393  03 28 29.654  +16 22 24.00  24.8w 15VM167   568  C~2lVj      
2017 09  17.59434  03 28 27.265  +16 22 09.49  24.8w 15VM167   568  C~2lVj      
2017 09  23.57295  03 28 09.840  +16 20 31.36  24.5w 15VM167   568  C~2lVj      
2017 12  16.35462  03 20 08.790  +15 47 19.37  25.0w 15VM167   568  C~2lVj      
2017 12  16.35926  03 20 08.757  +15 47 19.36  24.7w 15VM167   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    -0.01       0.00     0.01
  2   0.0137   -167.40     0.06     -27.34     0.01
  3   0.0820  -1635.34     0.01    -148.55    -0.07
  4   0.0847  -1713.55     0.03    -152.70    -0.04
  5   0.1636  -4352.06     0.05    -242.52    -0.08
  6   0.1638  -4358.63    -0.14    -242.39     0.14
  7   0.1640  -4365.76    -0.11    -242.49     0.14
  8   0.1642  -4372.59     0.08    -242.75    -0.01
  9   0.1670  -4474.41    -0.05    -244.72    -0.01
 10   0.1937  -5448.60     0.05    -259.45    -0.00
 11   0.1938  -5453.54     0.05    -259.49    -0.01
 12   0.9995   8640.31     0.04    -567.62    -0.00
 13   1.0542   7797.23    -0.07    -676.50    -0.14
 14   1.1554   4757.87    -0.08    -814.11    -0.08
 15   1.1605   4574.20     0.11    -818.17     0.02
 16   1.3083   -158.30    -0.06    -809.29     0.07
 17   1.3110   -213.84    -0.06    -807.37    -0.10
 18   1.3189   -372.44    -0.05    -800.61     0.03
 19   1.3219   -429.47     0.07    -797.88     0.05
 20   1.3873  -1090.86     0.04    -728.45     0.03
 21   2.0263  16924.90     0.02   -1189.66     0.01
 22   2.0289  16887.75     0.05   -1195.21    -0.07
 23   2.0453  16618.69    -0.10   -1228.17    -0.01
 24   2.2747   9376.97     0.07   -1401.55    -0.01
 25   2.2747   9376.51    -0.01   -1401.44     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.

15VM167    quality flag:3

Type:           4:3E      4:3E      4:3E

axisobj        36.746    36.764    36.729
ecceobj         0.215     0.216     0.214
incobj          4.338     4.338     4.338
qmin           28.204    28.173    28.242
qmax           45.058    45.055    45.062
amean          36.476    36.476    36.476
amin           36.153    36.162    36.141
amax           36.841    36.841    36.875
emean           0.196     0.197     0.196
emin            0.162     0.162     0.163
emax            0.225     0.225     0.224
imean           7.079     7.038     7.155
imin            4.152     4.153     3.904
imax            9.960     9.919    10.024
excite_mean     0.233     0.233     0.233
fracstop        1.000     1.000     1.000
cjmean          2.966     2.966     2.966

libcent 0       179.6     179.7     179.5
libamp  0        36.1      27.5      47.0
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        87.3      87.3      87.7
kozaiamp         77.1      76.7      74.1