Orbit Fit and Astrometric record for 15VM168

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: 15VM168   
# Created Tue Dec  7 02:13:46 2021
# Orbit generated from Bernstein formalism
# Fitting     32 observations of     32
# Arc:   3.07y
# First observation: 2014/11/19
#  Last observation: 2017/12/13
Preliminary a, adot, b, bdot, g, gdot:
  -0.000130   0.032288   0.000019  -0.007792   0.027172   0.000000
# Chi-squared of fit:     9.81 DOF:     58 RMS:  0.10
# Min/Max residuals:    -0.19    0.26
# Exact a, adot, b, bdot, g, gdot:
  1.847020E-05  3.237298E-02 -4.866643E-06 -7.822253E-03  2.735373E-02 -1.616965E-04
# Covariance matrix:
  8.9345E-13 -1.0665E-12 -1.3481E-13  2.1017E-13 -3.8231E-13 -8.4762E-12
 -1.0665E-12  1.4310E-12  1.9517E-13 -3.0379E-13  5.2072E-13  1.2256E-11
 -1.3481E-13  1.9517E-13  2.8370E-13 -1.9516E-13  7.4687E-14  1.8097E-12
  2.1017E-13 -3.0379E-13 -1.9516E-13  1.7819E-13 -1.1806E-13 -2.8159E-12
 -3.8231E-13  5.2072E-13  7.4687E-14 -1.1806E-13  3.2497E-13  4.7500E-12
 -8.4762E-12  1.2256E-11  1.8097E-12 -2.8159E-12  4.7500E-12  1.1361E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.967889   48.221614   -0.142178   -0.033458   -0.978130  2456980.788268
# Heliocentric elements and errors
Epoch:              2456980.5000  =  2014/11/19
Mean Anomaly:          359.75374 +/-     0.024
Argument of Peri:      188.75607 +/-     0.063
Long of Asc Node:      220.55894 +/-     0.000
Inclination:            13.71066 +/-     0.001
Eccentricity:         0.40951784 +/-    0.0001
Semi-Major Axis:     63.56643214 +/-    0.0073
Time of Perihelion: 2457107.1264 +/-      12.4
Perihelion:          37.53484426 +/-    0.0059
Aphelion:            89.59802003 +/-    0.0111
Period (y)              506.8156 +/-      0.09
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           24.88536443 +/-    0.0005
Ecliptic Y           28.07237482 +/-    0.0006
Ecliptic Z           -1.25557711 +/-    0.0000
Ecliptic XDOT        -0.00244928 +/-    0.0000
Ecliptic YDOT         0.00212172 +/-    0.0000
Ecliptic ZDOT        -0.00078181 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.53553069 +/-    0.0005
Geocenter to KBO     36.55808236 +/-    0.0008
# Hcoef:  9.57

The following table shows the complete astrometric record for 15VM168. 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 (15VM168) followed by the observatory code and reference code for the source of the astrometry.

2014 11  19.28749  03 05 18.567  +15 21 50.89  24.9r 15VM168   568  C~2lVm      
2015 08  11.56405  03 17 55.455  +15 55 55.15  25.1w 15VM168   568  C~2lVm      
2015 09  06.61072  03 18 01.203  +15 52 44.61  25.8w 15VM168   568  C~2lVm      
2015 09  12.50083  03 17 52.770  +15 51 25.06  26.7w 15VM168   568  C~2lVm      
2015 10  07.42237  03 16 41.683  +15 43 42.14  25.4w 15VM168   568  C~2lVm      
2015 10  08.49327  03 16 37.502  +15 43 18.53  25.4w 15VM168   568  C~2lVm      
2015 11  07.34843  03 14 16.858  +15 31 08.92  25.1r 15VM168   568  C~2lVm      
2015 11  07.39058  03 14 16.638  +15 31 07.83  25.3r 15VM168   568  C~2lVm      
2015 11  07.43274  03 14 16.419  +15 31 06.76  25.0r 15VM168   568  C~2lVm      
2015 11  10.51713  03 14 00.295  +15 29 48.27  25.2w 15VM168   568  C~2lVm      
2015 11  10.54648  03 14 00.144  +15 29 47.91  25.8w 15VM168   568  C~2lVm      
2015 11  17.36382  03 13 24.403  +15 26 55.92  25.5w 15VM168   568  C~2lVm      
2015 11  17.41043  03 13 24.164  +15 26 54.64  24.9w 15VM168   568  C~2lVm      
2015 12  06.37266  03 11 48.875  +15 19 29.39  25.7w 15VM168   568  C~2lVm      
2015 12  13.30706  03 11 17.521  +15 17 06.17  25.4w 15VM168   568  C~2lVm      
2015 12  13.36559  03 11 17.266  +15 17 05.02  25.4w 15VM168   568  C~2lVm      
2016 01  01.36029  03 10 08.024  +15 11 53.86  25.5w 15VM168   568  C~2lVm      
2016 01  07.30705  03 09 52.510  +15 10 44.98  25.3w 15VM168   568  C~2lVm      
2016 02  04.34036  03 09 27.990  +15 08 52.53  26.0w 15VM168   568  C~2lVm      
2016 02  11.22942  03 09 35.011  +15 09 19.27  25.8w 15VM168   568  C~2lVm      
2016 09  07.56785  03 25 46.870  +15 54 47.61  25.6w 15VM168   568  C~2lVm      
2016 09  27.50655  03 25 05.099  +15 49 25.63  25.8w 15VM168   568  C~2lVm      
2016 10  10.44325  03 24 19.427  +15 44 56.88  25.4w 15VM168   568  C~2lVn      
2016 10  10.50202  03 24 19.177  +15 44 55.62  25.6w 15VM168   568  C~2lVn      
2016 10  10.51973  03 24 19.097  +15 44 55.27  25.2w 15VM168   568  C~2lVn      
2016 11  02.51417  03 22 32.335  +15 35 47.74  25.5w 15VM168   568  C~2lVn      
2016 11  04.38927  03 22 22.717  +15 35 01.30  25.1w 15VM168   568  C~2lVn      
2016 12  24.33677  03 18 21.671  +15 17 03.70  25.9w 15VM168   568  C~2lVn      
2016 12  28.44224  03 18 07.287  +15 16 04.11  25.5w 15VM168   568  C~2lVn      
2017 01  26.34976  03 17 10.414  +15 12 19.80  25.9w 15VM168   568  C~2lVn      
2017 09  23.53642  03 33 06.444  +15 52 09.96  25.9w 15VM168   568  C~2lVn      
2017 12  13.36708  03 26 58.917  +15 22 33.53  25.3w 15VM168   568  C~2lVn      

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     0.05       0.00     0.07
     2   0.7263  11091.32    -0.06    -958.36    -0.16
     3   0.7976  11121.86    -0.00   -1164.23     0.01
     4   0.8137  10983.27    -0.05   -1209.38     0.21
     5   0.8820   9869.07    -0.06   -1388.15    -0.05
     6   0.8849   9804.47     0.01   -1395.11    -0.01
     7   0.9666   7648.39    -0.10   -1563.51    -0.12
     8   0.9667   7645.03    -0.06   -1563.72    -0.16
     9   0.9669   7641.69     0.00   -1563.91    -0.17
    10   0.9753   7395.84    -0.01   -1577.82    -0.16
    11   0.9754   7393.63     0.16   -1577.59     0.20
    12   0.9940   6849.17    -0.04   -1606.19     0.04
    13   0.9942   6845.49     0.06   -1606.51    -0.11
    14   1.0461   5397.24     0.06   -1667.94     0.03
    15   1.0651   4921.51    -0.06   -1684.35     0.01
    16   1.0652   4917.64    -0.01   -1684.47    -0.00
    17   1.1172   3868.28     0.01   -1714.67     0.01
    18   1.1335   3633.35    -0.10   -1720.42     0.01
    19   1.2103   3261.07     0.26   -1732.81     0.26
    20   1.2291   3366.20    -0.19   -1734.54     0.03
    21   1.8023  17680.53     0.07   -2771.65    -0.02
    22   1.8569  17011.48    -0.13   -2931.56     0.04
    23   1.8923  16301.08     0.20   -3024.75    -0.06
    24   1.8924  16297.24     0.09   -3025.05     0.01
    25   1.8925  16296.03     0.00   -3025.10     0.08
    26   1.9554  14656.28     0.02   -3161.80    -0.03
    27   1.9606  14509.32     0.00   -3171.13    -0.02
    28   2.0973  10849.75     0.02   -3311.53     0.10
    29   2.1086  10632.66    -0.06   -3314.76     0.15
    30   2.1877   9777.34    -0.01   -3315.99    -0.05
    31   2.8453  23850.76    -0.08   -4508.34    -0.09
    32   3.0666  18207.94    -0.00   -4914.33    -0.03

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.

15VM168    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        64.406    64.436    64.377
ecceobj         0.417     0.417     0.417
incobj         13.670    13.670    13.670
qmin           36.319    36.347    36.317
qmax           91.989    92.363    92.106
amean          63.450    63.608    63.479
amin           62.633    62.756    62.525
amax           64.538    64.718    64.559
emean           0.413     0.414     0.413
emin            0.400     0.400     0.399
emax            0.427     0.428     0.427
imean          14.049    14.059    14.063
imin           13.449    13.497    13.506
imax           14.816    14.813    14.848
excite_mean     0.479     0.480     0.480
fracstop        1.000     1.000     1.000
cjmean          3.040     3.040     3.039

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       181.8     182.0     181.0
kozaiamp        180.0     180.0     180.0