Orbit Fit and Astrometric record for 15VD164

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: 15VD164   
# Created Sat Dec  4 02:13:36 2021
# Orbit generated from Bernstein formalism
# Fitting     29 observations of     29
# Arc:   2.27y
# First observation: 2015/09/07
#  Last observation: 2017/12/16
Preliminary a, adot, b, bdot, g, gdot:
  -0.000116   0.020578  -0.000003  -0.010886   0.023508   0.000000
# Chi-squared of fit:     7.78 DOF:     52 RMS:  0.09
# Min/Max residuals:    -0.20    0.28
# Exact a, adot, b, bdot, g, gdot:
  1.408891E-05  2.043628E-02 -7.130336E-06 -1.081852E-02  2.345685E-02  1.314168E-03
# Covariance matrix:
  2.4263E-13  2.8107E-14  1.8482E-14 -7.9598E-14  1.9871E-13  3.3493E-12
  2.8107E-14  2.6085E-13  4.0939E-14 -1.8260E-13  1.8827E-13  7.6425E-12
  1.8482E-14  4.0939E-14  1.0606E-13 -1.0467E-13  4.0956E-14  1.7730E-12
 -7.9598E-14 -1.8260E-13 -1.0467E-13  2.7246E-13 -1.7975E-13 -7.9229E-12
  1.9871E-13  1.8827E-13  4.0956E-14 -1.7975E-13  3.0532E-13  7.5418E-12
  3.3493E-12  7.6425E-12  1.7730E-12 -7.9229E-12  7.5418E-12  3.3151E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.722682   52.271776    0.935498   -0.004688   -0.383461  2457273.133899
# Heliocentric elements and errors
Epoch:              2457270.5000  =  2015/09/05
Mean Anomaly:           28.20037 +/-     0.476
Argument of Peri:      149.21778 +/-     0.564
Long of Asc Node:      229.67739 +/-     0.000
Inclination:            27.91878 +/-     0.001
Eccentricity:         0.07000362 +/-    0.0005
Semi-Major Axis:     45.79208995 +/-    0.0047
Time of Perihelion: 2448404.3217 +/-     149.6
Perihelion:          42.58647811 +/-    0.0220
Aphelion:            48.99770179 +/-    0.0222
Period (y)              309.8803 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           27.05535322 +/-    0.0006
Ecliptic Y           33.44609006 +/-    0.0008
Ecliptic Z           -0.53800102 +/-    0.0000
Ecliptic XDOT        -0.00180434 +/-    0.0000
Ecliptic YDOT         0.00156189 +/-    0.0000
Ecliptic ZDOT        -0.00126450 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.02234911 +/-    0.0007
Geocenter to KBO     42.63147179 +/-    0.0010
# Hcoef:  8.45

The following table shows the complete astrometric record for 15VD164. 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 (15VD164) followed by the observatory code and reference code for the source of the astrometry.

2015 09  07.63311  03 20 13.174  +17 38 19.33  24.9w 15VD164   568  C~2fCO      
2015 09  12.49674  03 20 05.907  +17 37 16.32  24.8w 15VD164   568  C~2fCO      
2015 10  07.54436  03 18 58.021  +17 29 58.20  25.0w 15VD164   568  C~2fCO      
2015 10  07.60373  03 18 57.817  +17 29 56.80  25.2w 15VD164   568  C~2fCO      
2015 10  09.58362  03 18 50.526  +17 29 15.34  25.1w 15VD164   568  C~2fCO      
2015 11  07.33788  03 16 44.548  +17 17 55.96  24.4r 15VD164   568  C~2fCO      
2015 11  07.38006  03 16 44.344  +17 17 54.73  24.8r 15VD164   568  C~2fCO      
2015 11  07.42224  03 16 44.125  +17 17 53.75  24.9r 15VD164   568  C~2fCO      
2015 11  10.50536  03 16 29.250  +17 16 36.23  24.8w 15VD164   568  C~2fCO      
2015 11  17.35218  03 15 56.098  +17 13 44.05  25.0w 15VD164   568  C~2fCO      
2015 11  17.39878  03 15 55.872  +17 13 42.91  25.1w 15VD164   568  C~2fCO      
2015 12  06.36096  03 14 27.339  +17 06 02.78  25.0w 15VD164   568  C~2fCO      
2015 12  06.49848  03 14 26.722  +17 05 59.66  25.2w 15VD164   568  C~2fCO      
2016 01  01.34872  03 12 51.494  +16 57 21.80  24.4w 15VD164   568  C~2fCO      
2016 01  07.41130  03 12 35.851  +16 55 48.36  25.3w 15VD164   568  C~2fCO      
2016 01  07.42868  03 12 35.828  +16 55 48.39  25.7w 15VD164   568  C~2fCO      
2016 01  08.25624  03 12 33.931  +16 55 36.27  25.0w 15VD164   568  C~2fCO      
2016 02  05.28768  03 12 06.533  +16 51 28.71  24.9w 15VD164   568  C~2fCO      
2016 09  26.58416  03 24 57.161  +17 14 57.87  25.4w 15VD164   568  C~2fCO      
2016 11  02.51995  03 22 31.999  +17 01 24.97        15VD164   568  C~2fCO      
2016 11  04.39506  03 22 23.135  +17 00 39.01        15VD164   568  C~2fCO      
2016 12  24.33186  03 18 40.109  +16 41 46.49  25.2w 15VD164   568  C~2fCO      
2017 01  02.43457  03 18 11.646  +16 39 14.96  24.9w 15VD164   568  C~2fCO      
2017 01  27.28684  03 17 29.050  +16 34 46.37  24.9w 15VD164   568  C~2fCO      
2017 09  15.58250  03 30 46.299  +16 59 16.13        15VD164   568  C~2fCO      
2017 09  22.56874  03 30 31.667  +16 57 22.76  25.0w 15VD164   568  C~2fCO      
2017 12  13.39528  03 24 47.827  +16 27 02.88  24.6w 15VD164   568  C~2fCO      
2017 12  13.43255  03 24 47.663  +16 27 02.21  25.0w 15VD164   568  C~2fCO      
2017 12  16.37785  03 24 35.566  +16 26 03.47  24.8w 15VD164   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    -0.06       0.00    -0.03
     2   0.0133   -116.54    -0.12     -34.38    -0.03
     3   0.0819  -1167.25    -0.01    -209.05     0.00
     4   0.0821  -1170.43     0.16    -209.65    -0.20
     5   0.0875  -1281.89    -0.02    -222.90     0.11
     6   0.1662  -3199.73     0.08    -413.09     0.07
     7   0.1663  -3202.87     0.05    -413.52    -0.11
     8   0.1664  -3206.15    -0.10    -413.65     0.01
     9   0.1749  -3432.08    -0.08    -433.12    -0.04
    10   0.1936  -3935.61     0.06    -475.67    -0.07
    11   0.1937  -3939.03     0.12    -475.93    -0.06
    12   0.2457  -5284.77    -0.05    -587.96    -0.01
    13   0.2460  -5294.13    -0.07    -588.65     0.07
    14   0.3168  -6749.40    -0.07    -728.21     0.06
    15   0.3334  -6990.86    -0.08    -758.91     0.07
    16   0.3335  -6991.17     0.25    -758.79     0.28
    17   0.3357  -7020.66    -0.01    -763.27    -0.03
    18   0.4125  -7466.05    -0.06    -897.76     0.07
    19   1.0539   3579.07     0.16   -2382.18    -0.06
    20   1.1551   1360.41    -0.13   -2646.76    -0.01
    21   1.1602   1225.77    -0.05   -2659.11    -0.02
    22   1.2969  -2159.29    -0.01   -2937.77    -0.03
    23   1.3218  -2593.62     0.01   -2978.86    -0.03
    24   1.3899  -3254.70     0.04   -3080.24    -0.07
    25   2.0231   8204.30     0.12   -4527.83    -0.14
    26   2.0423   7972.78    -0.12   -4586.94    -0.01
    27   2.2663   2731.79     0.07   -5133.90     0.01
    28   2.2664   2729.33     0.02   -5133.96     0.12
    29   2.2745   2546.06    -0.11   -5147.33     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.

15VD164    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        46.229    46.247    46.211
ecceobj         0.079     0.081     0.078
incobj         27.808    27.808    27.808
qmin           41.940    41.902    41.944
qmax           50.070    50.177    49.990
amean          45.885    45.902    45.868
amin           45.521    45.546    45.505
amax           46.251    46.294    46.243
emean           0.072     0.073     0.070
emin            0.061     0.062     0.060
emax            0.083     0.084     0.081
imean          28.878    28.879    28.877
imin           28.647    28.641    28.653
imax           29.079    29.085    29.081
excite_mean     0.488     0.488     0.488
fracstop        1.000     1.000     1.000
cjmean          2.812     2.812     2.812

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       178.9     178.5     178.8
kozaiamp        180.0     180.0     180.0