Orbit Fit and Astrometric record for 15VC169

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: 15VC169   
# Created Tue Apr  1 01:10:40 2025
# Orbit generated from Bernstein formalism
# Fitting     33 observations of     33
# Arc:   2.85y
# First observation: 2014/11/17
#  Last observation: 2017/09/23
Preliminary a, adot, b, bdot, g, gdot:
  -0.000187   0.027052   0.000002  -0.000931   0.025944   0.000000
# Chi-squared of fit:     7.12 DOF:     60 RMS:  0.08
# Min/Max residuals:    -0.22    0.26
# Exact a, adot, b, bdot, g, gdot:
  1.661157E-05  2.685512E-02 -9.584499E-07 -9.264923E-04  2.598558E-02 -4.089240E-03
# Covariance matrix:
  2.5952E-13 -2.9863E-13 -2.3388E-15  6.0516E-15 -1.0696E-13 -2.5983E-12
 -2.9863E-13  4.9018E-13  4.7503E-15 -1.1944E-14  1.8200E-13  5.1647E-12
 -2.3388E-15  4.7503E-15  1.5678E-13 -9.5151E-14  1.8823E-15  5.9449E-14
  6.0516E-15 -1.1944E-14 -9.5151E-14  8.0842E-14 -6.5038E-15 -1.5285E-13
 -1.0696E-13  1.8200E-13  1.8823E-15 -6.5038E-15  2.5175E-13  2.6205E-12
 -2.5983E-12  5.1647E-12  5.9449E-14 -1.5285E-13  2.6205E-12  6.5730E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.593194   47.186316   -0.125544   -0.027140   -0.981102  2456978.792408
# Heliocentric elements and errors
Epoch:              2456970.5000  =  2014/11/09
Mean Anomaly:          310.85207 +/-     0.023
Argument of Peri:      284.98843 +/-     0.048
Long of Asc Node:      189.06267 +/-     0.009
Inclination:             2.50525 +/-     0.000
Eccentricity:         0.17617409 +/-    0.0003
Semi-Major Axis:     43.57095898 +/-    0.0059
Time of Perihelion: 2471312.0732 +/-       6.0
Perihelion:          35.89488507 +/-    0.0138
Aphelion:            51.24703289 +/-    0.0146
Period (y)              287.6099 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           26.71529472 +/-    0.0005
Ecliptic Y           29.02569436 +/-    0.0006
Ecliptic Z           -1.06998754 +/-    0.0000
Ecliptic XDOT        -0.00237442 +/-    0.0000
Ecliptic YDOT         0.00160006 +/-    0.0000
Ecliptic ZDOT        -0.00008550 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.46318257 +/-    0.0005
Geocenter to KBO     38.48287426 +/-    0.0007
# Hcoef:  8.52

The following table shows the complete astrometric record for 15VC169. 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 (15VC169) followed by the observatory code and reference code for the source of the astrometry.

2014 11  17.29163  03 00 45.196  +15 26 12.41  25.0r 15VC169   568  C~2nw0      
2014 11  17.40051  03 00 44.628  +15 26 10.01  24.4r 15VC169   568  C~2nw0      
2014 11  17.51464  03 00 44.036  +15 26 07.54  24.7r 15VC169   568  C~2nw0      
2014 11  19.30670  03 00 34.915  +15 25 28.66  24.4r 15VC169   568  C~2nw0      
2014 11  23.41007  03 00 14.203  +15 24 01.20  24.6r 15VC169   568  C~2nw0      
2015 08  11.62323  03 11 47.944  +16 11 42.09  24.6w 15VC169   568  C~2nw0      
2015 09  07.53281  03 11 42.685  +16 09 59.51  24.4w 15VC169   568  C~2nw0      
2015 09  12.52956  03 11 33.874  +16 09 10.19  24.8w 15VC169   568  C~2nw0      
2015 10  07.47166  03 10 17.743  +16 03 03.29  24.7w 15VC169   568  C~2nw0      
2015 10  08.47583  03 10 13.697  +16 02 45.12  24.7w 15VC169   568  C~2nw0      
2015 10  08.53403  03 10 13.462  +16 02 44.02  24.8w 15VC169   568  C~2nw0      
2015 11  06.29151  03 07 57.105  +15 52 51.11  24.6r 15VC169   568  C~2nw0      
2015 11  06.35485  03 07 56.766  +15 52 49.92  24.2r 15VC169   568  C~2nw0      
2015 11  06.42547  03 07 56.413  +15 52 48.64  24.6r 15VC169   568  C~2nw0      
2015 11  06.49480  03 07 56.049  +15 52 46.74  24.0r 15VC169   568  C~2nw0      
2015 11  07.51356  03 07 50.744  +15 52 24.64  24.5w 15VC169   568  C~2nw0      
2015 11  17.27960  03 06 59.954  +15 48 52.77  24.5w 15VC169   568  C~2nw0      
2015 11  17.32888  03 06 59.711  +15 48 51.72  24.5w 15VC169   568  C~2nw0      
2015 12  13.40075  03 04 54.080  +15 40 25.37  24.5w 15VC169   568  C~2nw0      
2016 01  01.39556  03 03 46.216  +15 36 09.32  24.7w 15VC169   568  C~2nw0      
2016 01  07.34177  03 03 31.013  +15 35 16.32  24.7w 15VC169   568  C~2nw0      
2016 02  04.27190  03 03 06.194  +15 34 29.83  24.7w 15VC169   568  C~2nw0      
2016 02  10.26162  03 03 11.466  +15 35 04.75  24.5w 15VC169   568  C~2nw0      
2016 09  06.59240  03 17 56.794  +16 31 18.31        15VC169   568  C~2nw0      
2016 09  26.58845  03 17 10.902  +16 27 25.57  24.9w 15VC169   568  C~2nw0      
2016 10  10.39070  03 16 20.021  +16 23 36.48  24.7w 15VC169   568  C~2nw0      
2016 10  10.44903  03 16 19.773  +16 23 35.33  24.6w 15VC169   568  C~2nw0      
2016 10  27.49679  03 15 01.124  +16 18 00.10  24.6w 15VC169   568  C~2nw0      
2016 11  02.60285  03 14 30.149  +16 15 51.68  24.5w 15VC169   568  C~2nw0      
2016 11  03.52184  03 14 25.426  +16 15 32.32  24.6w 15VC169   568  C~2nw0      
2017 01  26.26424  03 09 13.467  +15 56 07.24  24.6w 15VC169   568  C~2nw0      
2017 09  16.60944  03 23 57.805  +16 50 30.42  24.6w 15VC169   568  C~2nw0      
2017 09  23.54857  03 23 40.626  +16 49 06.89  24.5w 15VC169   568  C~2nw0      

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    -0.06       0.00     0.08
     2   0.0003     -8.56    -0.09      -0.00     0.05
     3   0.0006    -17.47    -0.05       0.03     0.07
     4   0.0055   -154.96     0.01      -0.29    -0.00
     5   0.0168   -466.98     0.04      -0.12    -0.00
     6   0.7319   9954.32    -0.01       2.45    -0.01
     7   0.8056   9853.62     0.15     -76.18    -0.06
     8   0.8193   9717.80     0.05     -89.69     0.03
     9   0.8876   8560.11    -0.04    -148.15    -0.13
    10   0.8903   8498.95    -0.03    -149.92     0.03
    11   0.8905   8495.38     0.05    -150.07    -0.03
    12   0.9692   6439.10    -0.03    -187.89    -0.21
    13   0.9694   6434.06    -0.07    -187.70    -0.01
    14   0.9696   6428.81     0.26    -187.54     0.16
    15   0.9698   6423.23     0.17    -187.94    -0.22
    16   0.9725   6343.49    -0.10    -188.36     0.01
    17   0.9993   5579.95    -0.15    -192.16     0.04
    18   0.9994   5576.29     0.08    -192.21    -0.03
    19   1.0708   3692.24    -0.01    -181.01    -0.03
    20   1.1228   2679.13    -0.03    -156.09     0.03
    21   1.1391   2453.36     0.05    -146.13     0.01
    22   1.2156   2095.90     0.06     -91.24     0.05
    23   1.2320   2178.79     0.08     -78.85     0.06
    24   1.8051  15406.04    -0.04    -266.36    -0.04
    25   1.8598  14704.39    -0.08    -318.84     0.13
    26   1.8976  13934.18    -0.05    -348.15     0.06
    27   1.8978  13930.42    -0.09    -348.33    -0.04
    28   1.9444  12745.11    -0.02    -373.66     0.01
    29   1.9612  12279.33    -0.16    -379.58    -0.03
    30   1.9637  12208.37    -0.01    -380.24     0.04
    31   2.1929   7553.81    -0.02    -298.37    -0.01
    32   2.8318  20756.27     0.04    -487.05     0.02
    33   2.8508  20493.91     0.12    -505.39     0.00

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.

15VC169    quality flag:2

Type:      CLASSICAL  SCATNEAR CLASSICAL

axisobj        43.872    43.886    43.858
ecceobj         0.175     0.176     0.175
incobj          2.495     2.495     2.495
qmin           35.421    35.689    34.958
qmax           52.178    52.372    52.497
amean          43.568    43.867    43.546
amin           43.177    43.274    43.150
amax           44.027    44.332    44.018
emean           0.148     0.138     0.156
emin            0.115     0.105     0.125
emax            0.186     0.188     0.194
imean           4.417     5.094     3.491
imin            2.741     2.731     0.127
imax            5.938     6.755     5.970
excite_mean     0.168     0.165     0.171
fracstop        1.000     1.000     1.000
cjmean          3.063     3.066     3.060

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       181.9     178.7     176.3
kozaiamp        179.9     180.0     180.0