Orbit Fit and Astrometric record for 15VC164

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: 15VC164   
# Created Fri Dec  3 02:13:35 2021
# Orbit generated from Bernstein formalism
# Fitting     29 observations of     29
# Arc:   2.19y
# First observation: 2015/10/07
#  Last observation: 2017/12/16
Preliminary a, adot, b, bdot, g, gdot:
  -0.000081   0.023705   0.000009   0.011391   0.025154   0.000000
# Chi-squared of fit:    15.54 DOF:     52 RMS:  0.13
# Min/Max residuals:    -0.34    0.28
# Exact a, adot, b, bdot, g, gdot:
  1.482919E-05  2.380244E-02  6.129700E-06  1.146333E-02  2.538617E-02  2.714461E-03
# Covariance matrix:
  1.9580E-13 -5.4354E-14 -8.2638E-15  3.8865E-14  1.3749E-13  1.9695E-12
 -5.4354E-14  3.4184E-13 -3.4554E-14  1.6206E-13  1.8699E-13  8.2186E-12
 -8.2638E-15 -3.4554E-14  1.3242E-13 -1.3160E-13 -3.1943E-14 -1.4215E-12
  3.8865E-14  1.6206E-13 -1.3160E-13  2.7349E-13  1.4998E-13  6.6668E-12
  1.3749E-13  1.8699E-13 -3.1943E-14  1.4998E-13  3.2104E-13  7.6040E-12
  1.9695E-12  8.2186E-12 -1.4215E-12  6.6668E-12  7.6040E-12  3.3810E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.420299   51.245241    0.611051   -0.005668   -0.795690  2457303.039329
# Heliocentric elements and errors
Epoch:              2457300.5000  =  2015/10/05
Mean Anomaly:           32.67258 +/-     0.151
Argument of Peri:      316.18467 +/-     0.224
Long of Asc Node:       51.23348 +/-     0.000
Inclination:            25.70080 +/-     0.001
Eccentricity:         0.14110390 +/-    0.0005
Semi-Major Axis:     45.24616178 +/-    0.0077
Time of Perihelion: 2447211.4104 +/-      46.6
Perihelion:          38.86175190 +/-    0.0250
Aphelion:            51.63057166 +/-    0.0257
Period (y)              304.3553 +/-      0.08
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           25.62851035 +/-    0.0006
Ecliptic Y           30.95551623 +/-    0.0007
Ecliptic Z           -0.28872700 +/-    0.0000
Ecliptic XDOT        -0.00181460 +/-    0.0000
Ecliptic YDOT         0.00183577 +/-    0.0000
Ecliptic ZDOT         0.00123417 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.18890259 +/-    0.0006
Geocenter to KBO     39.39152691 +/-    0.0009
# Hcoef:  9.36

The following table shows the complete astrometric record for 15VC164. 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 (15VC164) followed by the observatory code and reference code for the source of the astrometry.

2015 10  07.53854  03 15 43.746  +17 39 56.15  26.0w 15VC164   568  C~2fCN      
2015 10  07.59790  03 15 43.485  +17 39 55.34  25.7w 15VC164   568  C~2fCN      
2015 11  07.33264  03 13 14.286  +17 33 33.52  25.3r 15VC164   568  C~2fCO      
2015 11  07.37479  03 13 14.062  +17 33 33.21  24.9r 15VC164   568  C~2fCO      
2015 11  07.41697  03 13 13.826  +17 33 32.71  24.8r 15VC164   568  C~2fCO      
2015 11  10.49950  03 12 57.305  +17 32 48.15  25.0w 15VC164   568  C~2fCO      
2015 11  17.36965  03 12 20.423  +17 31 09.40  24.9w 15VC164   568  C~2fCO      
2015 11  17.41626  03 12 20.151  +17 31 08.75  25.6w 15VC164   568  C~2fCO      
2015 12  06.37850  03 10 42.307  +17 26 51.38  25.6w 15VC164   568  C~2fCO      
2015 12  13.31287  03 10 09.887  +17 25 30.63  25.1w 15VC164   568  C~2fCO      
2015 12  13.37141  03 10 09.603  +17 25 29.95  25.9w 15VC164   568  C~2fCO      
2016 02  04.28927  03 08 05.254  +17 23 21.30  27.2w 15VC164   568  C~2fCO      
2016 02  10.27908  03 08 08.389  +17 24 15.04  25.2w 15VC164   568  C~2fCO      
2016 09  07.57363  03 21 56.384  +18 40 48.51        15VC164   568  C~2fCO      
2016 09  27.51061  03 21 06.804  +18 40 00.90  26.1w 15VC164   568  C~2fCO      
2016 10  07.49247  03 20 29.601  +18 38 50.50  25.9w 15VC164   568  C~2fCO      
2016 10  07.58817  03 20 29.182  +18 38 49.80  25.3w 15VC164   568  C~2fCO      
2016 10  09.49252  03 20 21.277  +18 38 33.32  25.7w 15VC164   568  C~2fCO      
2016 10  09.56525  03 20 20.945  +18 38 32.76  25.6w 15VC164   568  C~2fCO      
2016 11  02.53154  03 18 25.216  +18 33 59.91  25.6w 15VC164   568  C~2fCO      
2016 11  02.53733  03 18 25.175  +18 33 59.94  25.8w 15VC164   568  C~2fCO      
2016 11  04.40663  03 18 15.300  +18 33 35.13  26.0w 15VC164   568  C~2fCO      
2016 12  24.30698  03 14 07.894  +18 23 10.51  26.3w 15VC164   568  C~2fCO      
2016 12  24.32550  03 14 07.826  +18 23 10.24  25.4w 15VC164   568  C~2fCO      
2017 01  02.40920  03 13 36.402  +18 22 04.33  25.8w 15VC164   568  C~2fCO      
2017 01  02.42780  03 13 36.351  +18 22 04.17  25.5w 15VC164   568  C~2fCO      
2017 01  26.29981  03 12 49.510  +18 21 24.80  25.7w 15VC164   568  C~2fCO      
2017 09  15.60695  03 26 29.797  +19 38 27.74  25.5w 15VC164   568  C~2fCO      
2017 12  16.36391  03 19 30.383  +19 23 21.82  25.1w 15VC164   568  C~2fCO      

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    -0.00       0.00     0.21
     2   0.0002     -3.81    -0.24       0.19     0.03
     3   0.0843  -2162.31     0.11     192.64    -0.09
     4   0.0844  -2165.48     0.25     193.19     0.16
     5   0.0845  -2168.87     0.18     193.60     0.28
     6   0.0930  -2408.55     0.01     213.17    -0.09
     7   0.1118  -2943.46     0.16     257.89    -0.06
     8   0.1119  -2947.39    -0.08     258.30     0.02
     9   0.1638  -4365.64    -0.18     383.59    -0.17
    10   0.1828  -4834.50     0.14     430.18    -0.04
    11   0.1830  -4838.60    -0.08     430.62    -0.01
    12   0.3279  -6588.53    -0.15     786.96     0.04
    13   0.3443  -6530.72    -0.19     826.55    -0.18
    14   0.9200   6073.55    -0.01    2163.74     0.03
    15   0.9746   5379.42     0.09    2296.40    -0.10
    16   1.0019   4849.85     0.17    2362.92    -0.19
    17   1.0022   4843.91    -0.07    2363.76    -0.02
    18   1.0074   4731.01    -0.11    2376.48     0.05
    19   1.0076   4726.30    -0.34    2377.14     0.20
    20   1.0732   3065.44     0.05    2535.34    -0.16
    21   1.0732   3064.89    -0.06    2535.52    -0.02
    22   1.0784   2922.78     0.19    2547.75     0.02
    23   1.2150   -638.69     0.04    2862.37     0.06
    24   1.2150   -639.70     0.07    2862.36    -0.06
    25   1.2399  -1088.62     0.01    2916.79     0.05
    26   1.2399  -1089.36     0.10    2916.83    -0.02
    27   1.3053  -1742.95    -0.03    3055.38    -0.09
    28   1.9413  10698.56    -0.05    4548.87    -0.07
    29   2.1925   4721.45     0.00    5161.86     0.22

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.

15VC164    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        45.739    45.767    45.712
ecceobj         0.151     0.152     0.149
incobj         25.609    25.609    25.608
qmin           38.061    38.009    38.065
qmax           53.077    53.133    52.912
amean          45.364    45.392    45.338
amin           44.994    45.018    44.959
amax           45.784    45.817    45.753
emean           0.144     0.145     0.143
emin            0.131     0.132     0.130
emax            0.159     0.160     0.157
imean          24.663    24.664    24.662
imin           24.290    24.294    24.294
imax           24.991    25.003    24.984
excite_mean     0.441     0.442     0.441
fracstop        1.000     1.000     1.000
cjmean          2.872     2.872     2.872

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       170.1     170.3     170.4
kozaiamp        180.0     180.0     179.9