Orbit Fit and Astrometric record for 15VJ171

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: 15VJ171   
# Created Sat Dec  4 02:13:43 2021
# Orbit generated from Bernstein formalism
# Fitting     31 observations of     31
# Arc:   2.04y
# First observation: 2015/09/07
#  Last observation: 2017/09/20
Preliminary a, adot, b, bdot, g, gdot:
  -0.000101   0.026884   0.000018   0.010641   0.026359   0.000000
# Chi-squared of fit:    13.20 DOF:     56 RMS:  0.12
# Min/Max residuals:    -0.28    0.39
# Exact a, adot, b, bdot, g, gdot:
  1.549776E-05  2.662669E-02  5.890024E-06  1.059054E-02  2.620367E-02  5.130466E-04
# Covariance matrix:
  2.2842E-13 -4.1217E-14 -7.3729E-15  3.8725E-14  1.5983E-13  2.1561E-12
 -4.1217E-14  2.9828E-13 -2.2683E-14  1.0789E-13  1.5799E-13  5.9322E-12
 -7.3729E-15 -2.2683E-14  1.2261E-13 -1.1226E-13 -2.1064E-14 -8.0233E-13
  3.8725E-14  1.0789E-13 -1.1226E-13  2.0018E-13  1.0453E-13  3.8226E-12
  1.5983E-13  1.5799E-13 -2.1064E-14  1.0453E-13  2.7542E-13  5.7793E-12
  2.1561E-12  5.9322E-12 -8.0233E-13  3.8226E-12  5.7793E-12  2.1023E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.180513   52.060323    0.934076   -0.007823   -0.386860  2457273.133899
# Heliocentric elements and errors
Epoch:              2457270.5000  =  2015/09/05
Mean Anomaly:          358.14990 +/-     0.143
Argument of Peri:      359.45510 +/-     0.203
Long of Asc Node:       53.61253 +/-     0.000
Inclination:            21.70509 +/-     0.001
Eccentricity:         0.16665907 +/-    0.0001
Semi-Major Axis:     46.26228818 +/-    0.0036
Time of Perihelion: 2457861.1516 +/-      45.6
Perihelion:          38.55225823 +/-    0.0040
Aphelion:            53.97231813 +/-    0.0050
Period (y)              314.6653 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           24.42911314 +/-    0.0005
Ecliptic Y           29.82146002 +/-    0.0006
Ecliptic Z           -0.78600824 +/-    0.0000
Ecliptic XDOT        -0.00214899 +/-    0.0000
Ecliptic YDOT         0.00176432 +/-    0.0000
Ecliptic ZDOT         0.00110525 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.55799340 +/-    0.0006
Geocenter to KBO     38.16258934 +/-    0.0008
# Hcoef:  8.88

The following table shows the complete astrometric record for 15VJ171. 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 (15VJ171) followed by the observatory code and reference code for the source of the astrometry.

2015 09  07.63311  03 19 51.208  +17 08 31.32  25.1w 15VJ171   568  C~2nw9      
2015 09  12.49674  03 19 42.656  +17 08 20.17  24.8w 15VJ171   568  C~2nw9      
2015 10  07.54436  03 18 24.582  +17 05 21.76  24.9w 15VJ171   568  C~2nw9      
2015 10  09.58362  03 18 16.030  +17 04 59.48  25.1w 15VJ171   568  C~2nw9      
2015 11  07.33788  03 15 52.674  +16 58 28.17  24.3r 15VJ171   568  C~2nw9      
2015 11  07.38006  03 15 52.432  +16 58 27.59  24.4r 15VJ171   568  C~2nw9      
2015 11  07.42224  03 15 52.203  +16 58 26.97  24.5r 15VJ171   568  C~2nw9      
2015 11  10.50536  03 15 35.295  +16 57 40.16  24.7w 15VJ171   568  C~2nw9      
2015 11  17.35218  03 14 57.641  +16 55 56.70  24.8w 15VJ171   568  C~2nw9      
2015 11  17.39878  03 14 57.381  +16 55 55.97  24.9w 15VJ171   568  C~2nw9      
2015 12  06.36096  03 13 16.908  +16 51 29.70  24.9w 15VJ171   568  C~2nw9      
2015 12  06.49848  03 13 16.190  +16 51 27.88  25.2w 15VJ171   568  C~2nw9      
2016 01  01.34872  03 11 27.983  +16 47 28.39  24.9w 15VJ171   568  C~2nw9      
2016 01  07.41130  03 11 10.118  +16 47 03.46  24.7w 15VJ171   568  C~2nw9      
2016 01  08.25624  03 11 07.942  +16 47 01.03  25.2w 15VJ171   568  C~2nw9      
2016 09  07.57363  03 25 22.808  +18 06 47.86        15VJ171   568  C~2nw9      
2016 09  27.51061  03 24 34.568  +18 05 38.93  25.3w 15VJ171   568  C~2nw9      
2016 09  29.48481  03 24 27.839  +18 05 25.24  25.1w 15VJ171   568  C~2nw9      
2016 10  05.48792  03 24 05.455  +18 04 36.40  25.2w 15VJ171   568  C~2nw9      
2016 10  07.58817  03 23 56.931  +18 04 17.10  25.1w 15VJ171   568  C~2nw9      
2016 10  09.49252  03 23 48.983  +18 03 58.70  25.1w 15VJ171   568  C~2nw9      
2016 10  09.56525  03 23 48.690  +18 03 57.98  24.8w 15VJ171   568  C~2nw9      
2016 11  02.52573  03 21 51.085  +17 59 03.06  25.0w 15VJ171   568  C~2nw9      
2016 11  04.40084  03 21 40.942  +17 58 36.77  24.9w 15VJ171   568  C~2nw9      
2016 12  25.28177  03 17 22.335  +17 47 46.92  24.4w 15VJ171   568  C~2nw9      
2016 12  28.42845  03 17 10.494  +17 47 22.51  25.0w 15VJ171   568  C~2nw9      
2017 01  02.42780  03 16 53.438  +17 46 51.04  25.0w 15VJ171   568  C~2nw9      
2017 01  26.34230  03 16 04.816  +17 46 24.75  25.2w 15VJ171   568  C~2nw9      
2017 01  27.27995  03 16 04.122  +17 46 28.44  25.3w 15VJ171   568  C~2nw9      
2017 09  15.56413  03 30 45.390  +19 04 26.35  25.1w 15VJ171   568  C~2nw9      
2017 09  20.61305  03 30 33.541  +19 04 16.16  25.0w 15VJ171   568  C~2nw9      

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     0.12       0.00     0.10
     2   0.0133   -121.35    -0.03      20.61    -0.05
     3   0.0819  -1248.89    -0.03     135.75    -0.03
     4   0.0875  -1373.11     0.01     145.83    -0.03
     5   0.1662  -3460.61     0.18     301.24     0.04
     6   0.1663  -3464.11     0.08     301.59     0.12
     7   0.1664  -3467.45     0.16     301.84     0.11
     8   0.1749  -3713.91    -0.02     319.98    -0.00
     9   0.1936  -4262.65    -0.00     361.48    -0.01
    10   0.1937  -4266.45    -0.01     361.75    -0.05
    11   0.2457  -5728.62     0.09     484.20    -0.01
    12   0.2460  -5739.05    -0.22     485.16     0.01
    13   0.3168  -7302.16    -0.07     666.35    -0.09
    14   0.3334  -7556.41    -0.28     710.72     0.05
    15   0.3357  -7587.22     0.08     716.71    -0.12
    16   1.0019   5470.98    -0.09    2187.24     0.03
    17   1.0565   4787.30    -0.05    2291.96    -0.04
    18   1.0619   4690.92    -0.03    2302.68     0.03
    19   1.0783   4369.51     0.18    2335.25    -0.17
    20   1.0841   4246.94    -0.24    2347.02    -0.02
    21   1.0893   4132.55    -0.14    2357.62     0.06
    22   1.0895   4128.33     0.18    2357.97    -0.02
    23   1.1551   2430.13    -0.20    2495.42    -0.13
    24   1.1602   2283.45    -0.12    2506.66     0.02
    25   1.2995  -1451.82     0.39    2824.88    -0.01
    26   1.3081  -1621.51     0.02    2845.15    -0.15
    27   1.3218  -1864.99     0.10    2878.00     0.24
    28   1.3873  -2542.57    -0.09    3033.41     0.00
    29   1.3899  -2551.18    -0.05    3039.56     0.07
    30   2.0231  10775.20     0.02    4419.34     0.06
    31   2.0369  10609.27     0.05    4450.02    -0.02

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.

15VJ171    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        46.765    46.778    46.752
ecceobj         0.175     0.175     0.175
incobj         21.634    21.634    21.634
qmin           37.546    37.530    37.494
qmax           55.576    55.576    55.564
amean          46.355    46.368    46.332
amin           45.950    45.971    45.936
amax           46.810    46.804    46.802
emean           0.173     0.173     0.172
emin            0.159     0.159     0.159
emax            0.188     0.187     0.187
imean          20.481    20.482    20.479
imin           20.062    20.063    20.040
imax           20.885    20.883    20.880
excite_mean     0.390     0.390     0.390
fracstop        1.000     1.000     1.000
cjmean          2.939     2.939     2.939

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       175.4     175.8     175.9
kozaiamp        180.0     179.9     180.0