Orbit Fit and Astrometric record for 15VP167

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: 15VP167   
# Created Fri Dec  3 02:13:38 2021
# Orbit generated from Bernstein formalism
# Fitting     38 observations of     38
# Arc:   2.35y
# First observation: 2015/08/12
#  Last observation: 2017/12/16
Preliminary a, adot, b, bdot, g, gdot:
  -0.000138   0.027859   0.000001   0.011032   0.027573   0.000000
# Chi-squared of fit:     6.09 DOF:     70 RMS:  0.07
# Min/Max residuals:    -0.29    0.15
# Exact a, adot, b, bdot, g, gdot:
  1.600764E-05  2.739217E-02  6.192835E-06  1.087093E-02  2.724205E-02  2.737642E-03
# Covariance matrix:
  1.5280E-13  3.8303E-15 -3.8893E-15  2.9853E-14  1.1283E-13  1.3761E-12
  3.8303E-15  2.7557E-13 -2.7549E-14  1.2824E-13  1.7786E-13  5.8082E-12
 -3.8893E-15 -2.7549E-14  8.4004E-14 -7.5859E-14 -1.9779E-14 -8.4142E-13
  2.9853E-14  1.2824E-13 -7.5859E-14  1.6177E-13  1.0465E-13  3.8274E-12
  1.1283E-13  1.7786E-13 -1.9779E-14  1.0465E-13  2.2169E-13  4.7658E-12
  1.3761E-12  5.8082E-12 -8.4142E-13  3.8274E-12  4.7658E-12  1.7317E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -3.032306   49.429901    1.015769    0.000065   -0.001110  2457247.082569
# Heliocentric elements and errors
Epoch:              2457240.5000  =  2015/08/06
Mean Anomaly:           30.30906 +/-     0.136
Argument of Peri:      313.84828 +/-     0.184
Long of Asc Node:       55.48039 +/-     0.000
Inclination:            21.73287 +/-     0.001
Eccentricity:         0.11551537 +/-    0.0003
Semi-Major Axis:     40.60743616 +/-    0.0038
Time of Perihelion: 2449282.9982 +/-      35.6
Perihelion:          35.91665303 +/-    0.0132
Aphelion:            45.29821929 +/-    0.0135
Period (y)              258.7716 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           24.60895979 +/-    0.0004
Ecliptic Y           27.18484763 +/-    0.0005
Ecliptic Z           -1.94155660 +/-    0.0000
Ecliptic XDOT        -0.00187693 +/-    0.0000
Ecliptic YDOT         0.00203670 +/-    0.0000
Ecliptic ZDOT         0.00107651 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   36.72038241 +/-    0.0005
Geocenter to KBO     36.70795301 +/-    0.0006
# Hcoef:  8.43

The following table shows the complete astrometric record for 15VP167. 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 (15VP167) followed by the observatory code and reference code for the source of the astrometry.

2015 08  12.58178  03 11 18.998  +14 40 00.79  24.2w 15VP167   568  C~2lVj      
2015 08  12.58594  03 11 19.004  +14 40 00.50  24.2w 15VP167   568  C~2lVj      
2015 09  07.54100  03 11 07.731  +14 39 49.60  24.3w 15VP167   568  C~2lVj      
2015 09  12.53775  03 10 57.478  +14 39 17.19  24.4w 15VP167   568  C~2lVj      
2015 10  07.48475  03 09 32.038  +14 34 36.31  24.5w 15VP167   568  C~2lVj      
2015 10  08.48746  03 09 27.574  +14 34 21.63  24.3w 15VP167   568  C~2lVj      
2015 10  08.54568  03 09 27.298  +14 34 20.91  24.0w 15VP167   568  C~2lVj      
2015 10  08.55734  03 09 27.238  +14 34 20.59  24.1w 15VP167   568  C~2lVj      
2015 10  08.57055  03 09 27.183  +14 34 20.24  24.1w 15VP167   568  C~2lVj      
2015 11  06.30199  03 06 57.267  +14 26 24.78  24.0r 15VP167   568  C~2lVj      
2015 11  06.36535  03 06 56.913  +14 26 23.79  24.1r 15VP167   568  C~2lVj      
2015 11  06.43596  03 06 56.507  +14 26 22.55  23.9r 15VP167   568  C~2lVj      
2015 11  06.50529  03 06 56.102  +14 26 21.24  24.0r 15VP167   568  C~2lVj      
2015 11  07.52528  03 06 50.311  +14 26 03.72  24.2w 15VP167   568  C~2lVj      
2015 11  17.29127  03 05 54.706  +14 23 19.40  24.2w 15VP167   568  C~2lVj      
2015 11  17.34053  03 05 54.419  +14 23 18.66  24.2w 15VP167   568  C~2lVj      
2015 12  06.41938  03 04 10.926  +14 18 41.46  24.3w 15VP167   568  C~2lVj      
2015 12  13.35388  03 03 37.207  +14 17 23.75  24.4w 15VP167   568  C~2lVj      
2015 12  13.41241  03 03 36.938  +14 17 23.16  24.5w 15VP167   568  C~2lVj      
2016 01  01.40713  03 02 22.303  +14 15 19.72  24.5w 15VP167   568  C~2lVj      
2016 01  07.35336  03 02 05.427  +14 15 11.94  24.3w 15VP167   568  C~2lVj      
2016 02  04.27768  03 01 35.868  +14 18 17.52  24.2w 15VP167   568  C~2lVj      
2016 02  10.26747  03 01 40.802  +14 19 45.35  24.6w 15VP167   568  C~2lVj      
2016 09  06.61716  03 16 45.989  +15 41 17.72        15VP167   568  C~2lVj      
2016 09  26.60468  03 15 53.430  +15 38 52.04  24.6w 15VP167   568  C~2lVj      
2016 10  10.41386  03 14 56.783  +15 36 02.71  24.4w 15VP167   568  C~2lVj      
2016 10  10.47261  03 14 56.506  +15 36 01.87  24.5w 15VP167   568  C~2lVj      
2016 10  27.50838  03 13 29.993  +15 31 42.43  24.3w 15VP167   568  C~2lVj      
2016 11  03.53341  03 12 50.891  +15 29 47.15  24.2w 15VP167   568  C~2lVj      
2016 12  28.40571  03 08 10.720  +15 18 09.06  24.4w 15VP167   568  C~2lVj      
2016 12  29.36323  03 08 07.356  +15 18 04.38  23.5w 15VP167   568  C~2lVj      
2017 01  01.26044  03 07 57.683  +15 17 52.41  24.2w 15VP167   568  C~2lVj      
2017 01  02.37026  03 07 54.160  +15 17 48.78  24.6w 15VP167   568  C~2lVj      
2017 01  26.26424  03 07 09.063  +15 18 41.17  24.4w 15VP167   568  C~2lVj      
2017 09  16.60944  03 22 05.876  +16 41 14.16  24.5w 15VP167   568  C~2lVj      
2017 09  23.54857  03 21 46.229  +16 40 27.34        15VP167   568  C~2lVj      
2017 12  16.38250  03 14 41.814  +16 21 42.78  24.3w 15VP167   568  C~2lVj      
2017 12  16.38715  03 14 41.794  +16 21 42.69  24.6w 15VP167   568  C~2lVj      

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    -0.02       0.00     0.02
     2   0.0000      0.01    -0.07      -0.30    -0.29
     3   0.0711   -160.53     0.04      32.96     0.01
     4   0.0848   -312.57     0.00      41.56     0.08
     5   0.1531  -1582.60     0.01     104.05     0.03
     6   0.1558  -1648.97     0.13     107.37    -0.02
     7   0.1560  -1653.02     0.05     107.75     0.15
     8   0.1560  -1653.95    -0.08     107.68     0.03
     9   0.1560  -1654.81    -0.04     107.56    -0.14
    10   0.2347  -3879.71    -0.14     239.23     0.06
    11   0.2349  -3884.93     0.03     239.68     0.11
    12   0.2351  -3890.94     0.04     240.09     0.07
    13   0.2352  -3896.96    -0.06     240.43    -0.01
    14   0.2380  -3982.71     0.01     246.46     0.00
    15   0.2648  -4805.11     0.07     308.63    -0.02
    16   0.2649  -4809.32     0.04     309.06     0.05
    17   0.3171  -6332.80     0.13     454.68    -0.02
    18   0.3361  -6825.88    -0.06     514.90     0.03
    19   0.3363  -6829.80     0.07     515.41     0.00
    20   0.3883  -7908.06    -0.12     696.56     0.00
    21   0.4046  -8146.33     0.02     757.10    -0.10
    22   0.4810  -8508.31    -0.04    1054.85    -0.01
    23   0.4974  -8414.88    -0.04    1119.37    -0.09
    24   1.0706   5539.11    -0.11    2294.82     0.14
    25   1.1253   4767.84    -0.08    2352.95    -0.03
    26   1.1631   3933.38     0.06    2404.64     0.04
    27   1.1633   3929.29     0.04    2404.88     0.01
    28   1.2099   2654.65     0.06    2484.88    -0.03
    29   1.2292   2079.05     0.07    2523.69     0.02
    30   1.3794  -2011.87    -0.10    2938.31     0.00
    31   1.3820  -2060.00    -0.05    2947.00    -0.00
    32   1.3899  -2197.99     0.09    2973.42    -0.06
    33   1.3930  -2248.05     0.02    2983.75     0.00
    34   1.4584  -2861.96     0.03    3211.46    -0.02
    35   2.0973  10930.16     0.03    4583.28    -0.00
    36   2.1163  10644.43    -0.00    4609.97    -0.11
    37   2.3458   4448.03    -0.03    5106.32     0.07
    38   2.3458   4447.73    -0.01    5106.31     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.

15VP167    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        41.020    41.036    41.004
ecceobj         0.125     0.126     0.124
incobj         21.669    21.669    21.669
qmin           34.369    34.198    34.522
qmax           47.363    47.427    47.205
amean          40.698    40.698    40.698
amin           40.343    40.354    40.325
amax           41.071    41.081    41.076
emean           0.125     0.127     0.123
emin            0.093     0.092     0.098
emax            0.154     0.157     0.151
imean          20.128    20.089    20.179
imin           19.134    19.140    19.352
imax           21.009    21.086    21.031
excite_mean     0.366     0.367     0.366
fracstop        1.000     1.000     1.000
cjmean          2.905     2.905     2.905

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       180.9     186.2     172.6
kozaiamp        180.0     180.0     180.0