Orbit Fit and Astrometric record for 15VA167

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: 15VA167   
# Created Thu Mar 28 01:18:26 2024
# Orbit generated from Bernstein formalism
# Fitting     36 observations of     36
# Arc:   2.83y
# First observation: 2014/11/17
#  Last observation: 2017/09/16
Preliminary a, adot, b, bdot, g, gdot:
  -0.000020   0.025442   0.000004  -0.005092   0.025340   0.000000
# Chi-squared of fit:     3.44 DOF:     66 RMS:  0.05
# Min/Max residuals:    -0.17    0.15
# Exact a, adot, b, bdot, g, gdot:
  1.599230E-05  2.550136E-02 -3.277656E-06 -5.108927E-03  2.538553E-02 -1.546405E-03
# Covariance matrix:
  2.5240E-13 -2.9680E-13 -1.4846E-14  3.6476E-14 -1.1906E-13 -2.9409E-12
 -2.9680E-13  5.0980E-13  3.2393E-14 -7.9495E-14  2.4863E-13  6.4133E-12
 -1.4846E-14  3.2393E-14  1.6589E-13 -1.0909E-13  1.9222E-14  4.9117E-13
  3.6476E-14 -7.9495E-14 -1.0909E-13  1.0170E-13 -4.8216E-14 -1.2060E-12
 -1.1906E-13  2.4863E-13  1.9222E-14 -4.8216E-14  2.7346E-13  3.8454E-12
 -2.9409E-12  6.4133E-12  4.9117E-13 -1.2060E-12  3.8454E-12  9.7267E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.276665   48.112756   -0.109393   -0.021764   -0.983169  2456978.777218
# Heliocentric elements and errors
Epoch:              2456970.5000  =  2014/11/09
Mean Anomaly:          326.13321 +/-     0.143
Argument of Peri:      227.04925 +/-     0.184
Long of Asc Node:      222.07579 +/-     0.000
Inclination:            11.39023 +/-     0.001
Eccentricity:         0.09735136 +/-    0.0003
Semi-Major Axis:     43.76828988 +/-    0.0041
Time of Perihelion: 2466920.1841 +/-      42.1
Perihelion:          39.50738745 +/-    0.0122
Aphelion:            48.02919231 +/-    0.0125
Period (y)              289.5660 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           26.86657766 +/-    0.0005
Ecliptic Y           30.12553760 +/-    0.0006
Ecliptic Z           -0.87781475 +/-    0.0000
Ecliptic XDOT        -0.00217132 +/-    0.0000
Ecliptic YDOT         0.00169808 +/-    0.0000
Ecliptic ZDOT        -0.00054705 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.37488786 +/-    0.0006
Geocenter to KBO     39.39252531 +/-    0.0008
# Hcoef:  7.53

The following table shows the complete astrometric record for 15VA167. 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 (15VA167) followed by the observatory code and reference code for the source of the astrometry.

2014 11  17.27644  03 04 05.011  +15 59 55.01  23.9r 15VA167   568  C~2lVh      
2014 11  17.38513  03 04 04.457  +15 59 52.45  23.7r 15VA167   568  C~2lVh      
2014 11  17.49897  03 04 03.881  +15 59 49.72  23.4r 15VA167   568  C~2lVh      
2014 11  19.28749  03 03 54.952  +15 59 07.82  23.5r 15VA167   568  C~2lVh      
2014 11  23.39103  03 03 34.640  +15 57 32.90  23.5r 15VA167   568  C~2lVh      
2015 09  06.62350  03 14 51.503  +16 30 03.75  23.6w 15VA167   568  C~2lVh      
2015 09  12.51312  03 14 42.117  +16 28 56.99  23.8w 15VA167   568  C~2lVh      
2015 10  07.43992  03 13 29.605  +16 22 13.22  23.8w 15VA167   568  C~2lVh      
2015 10  07.44703  03 13 29.575  +16 22 13.12  23.8w 15VA167   568  C~2lVh      
2015 10  08.45165  03 13 25.677  +16 21 53.36  23.9w 15VA167   568  C~2lVh      
2015 10  08.51072  03 13 25.442  +16 21 52.17  23.7w 15VA167   568  C~2lVh      
2015 11  07.35903  03 11 07.920  +16 10 51.77  23.5r 15VA167   568  C~2lVh      
2015 11  07.40112  03 11 07.704  +16 10 50.80  23.6r 15VA167   568  C~2lVh      
2015 11  07.44330  03 11 07.490  +16 10 49.85  23.6r 15VA167   568  C~2lVh      
2015 11  10.52886  03 10 51.848  +16 09 37.68  23.6w 15VA167   568  C~2lVh      
2015 11  17.37547  03 10 17.128  +16 06 58.61  23.5w 15VA167   568  C~2lVh      
2015 11  17.42215  03 10 16.888  +16 06 57.54  23.5w 15VA167   568  C~2lVh      
2015 12  06.38432  03 08 44.887  +16 00 02.71  23.8w 15VA167   568  C~2lVh      
2015 12  13.31874  03 08 14.626  +15 57 47.86  23.8w 15VA167   568  C~2lVh      
2015 12  13.37723  03 08 14.373  +15 57 46.75  23.7w 15VA167   568  C~2lVh      
2016 01  01.37186  03 07 07.228  +15 52 49.52  23.8w 15VA167   568  C~2lVh      
2016 01  07.31862  03 06 52.018  +15 51 42.30  23.8w 15VA167   568  C~2lVh      
2016 02  04.29505  03 06 25.884  +15 49 40.94  23.9w 15VA167   568  C~2lVh      
2016 02  04.30157  03 06 25.890  +15 49 40.94  23.8w 15VA167   568  C~2lVh      
2016 02  10.28486  03 06 30.635  +15 49 58.33  23.9w 15VA167   568  C~2lVh      
2016 09  06.59240  03 20 58.706  +16 35 42.10  23.9w 15VA167   568  C~2lVh      
2016 09  26.58845  03 20 15.480  +16 31 11.40  23.8w 15VA167   568  C~2lVh      
2016 10  10.39070  03 19 26.771  +16 26 58.79  23.9w 15VA167   568  C~2lVh      
2016 10  10.44903  03 19 26.535  +16 26 57.66  23.9w 15VA167   568  C~2lVh      
2016 10  27.49679  03 18 10.708  +16 20 54.99  23.7w 15VA167   568  C~2lVh      
2016 11  02.60285  03 17 40.736  +16 18 37.10  23.9w 15VA167   568  C~2lVh      
2016 11  03.52184  03 17 36.160  +16 18 16.25  23.7w 15VA167   568  C~2lVh      
2016 12  24.30148  03 13 39.308  +16 01 03.45  23.8w 15VA167   568  C~2lVh      
2017 01  02.40371  03 13 10.411  +15 59 02.76  23.9w 15VA167   568  C~2lVh      
2017 01  26.29235  03 12 29.873  +15 56 17.11  23.6w 15VA167   568  C~2lVh      
2017 09  16.60944  03 26 52.322  +16 38 53.87  23.7w 15VA167   568  C~2lVh      

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   0.0003     -8.38    -0.03      -0.25     0.00
     3   0.0006    -17.12     0.02      -0.58    -0.06
     4   0.0055   -152.44    -0.04      -5.26    -0.04
     5   0.0167   -460.18     0.02     -15.44    -0.08
     6   0.8031   9459.14    -0.17    -772.55     0.13
     7   0.8193   9311.01    -0.07    -801.37     0.03
     8   0.8875   8196.07     0.12    -914.77    -0.03
     9   0.8875   8195.63     0.10    -914.75     0.02
    10   0.8903   8136.21     0.01    -918.92     0.05
    11   0.8904   8132.62     0.02    -919.17     0.03
    12   0.9722   6045.53     0.10   -1027.39    -0.04
    13   0.9723   6042.27     0.10   -1027.49    -0.04
    14   0.9724   6039.04     0.15   -1027.58    -0.01
    15   0.9808   5802.40    -0.05   -1036.64    -0.00
    16   0.9996   5277.39    -0.03   -1055.39     0.02
    17   0.9997   5273.77    -0.02   -1055.49     0.02
    18   1.0516   3884.15    -0.07   -1096.80     0.05
    19   1.0706   3427.41     0.01   -1108.24     0.02
    20   1.0708   3423.60    -0.04   -1108.31     0.01
    21   1.1228   2410.51     0.08   -1130.72     0.00
    22   1.1391   2181.01    -0.01   -1135.49     0.00
    23   1.2157   1785.04    -0.07   -1149.14     0.01
    24   1.2157   1785.12    -0.02   -1149.16    -0.01
    25   1.2321   1855.75    -0.00   -1151.17     0.05
    26   1.8051  14663.76     0.02   -1821.35    -0.04
    27   1.8599  13990.35    -0.04   -1923.42    -0.06
    28   1.8976  13245.06    -0.01   -1986.84    -0.02
    29   1.8978  13241.48     0.02   -1987.05    -0.01
    30   1.9445  12089.28    -0.03   -2054.53    -0.01
    31   1.9612  11635.31    -0.11   -2075.37    -0.02
    32   1.9637  11566.05     0.01   -2078.33    -0.00
    33   2.1027   7993.93     0.00   -2177.15    -0.03
    34   2.1277   7559.53    -0.02   -2182.81    -0.07
    35   2.1931   6951.12     0.05   -2186.77     0.13
    36   2.8318  19665.20     0.02   -2927.18    -0.03

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.

15VA167    quality flag:2

Type:       SCATNEAR  SCATNEAR CLASSICAL

axisobj        44.092    44.102    44.082
ecceobj         0.100     0.100     0.099
incobj         11.351    11.351    11.351
qmin           34.024    34.127    34.207
qmax           53.960    53.711    53.729
amean          43.727    43.726    43.727
amin           43.327    43.321    43.337
amax           44.202    44.196    44.180
emean           0.152     0.150     0.148
emin            0.057     0.062     0.051
emax            0.221     0.217     0.217
imean          10.172    10.447    10.511
imin            6.819     7.088     7.165
imax           13.037    13.317    13.240
excite_mean     0.239     0.241     0.241
fracstop        1.000     1.000     1.000
cjmean          3.029     3.028     3.028

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       286.8     267.9     272.7
kozaiamp         71.0      66.8      70.0