Orbit Fit and Astrometric record for 15VZ167

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: 15VZ167   
# Created Sat Dec  4 02:13:40 2021
# Orbit generated from Bernstein formalism
# Fitting     22 observations of     22
# Arc:   2.09y
# First observation: 2014/11/23
#  Last observation: 2016/12/24
Preliminary a, adot, b, bdot, g, gdot:
   0.001459   0.098110   0.000328   0.026934   0.059024   0.000000
# Chi-squared of fit:     2.70 DOF:     38 RMS:  0.06
# Min/Max residuals:    -0.16    0.15
# Exact a, adot, b, bdot, g, gdot:
  2.708745E-05  1.035469E-01  7.488660E-06  2.837519E-02  6.043460E-02  2.575026E-02
# Covariance matrix:
  1.3954E-12 -2.0217E-12  2.1812E-13 -4.3815E-13 -5.5245E-13 -6.5457E-12
 -2.0217E-12  3.4001E-12 -4.0297E-13  8.0939E-13  9.7693E-13  1.2093E-11
  2.1812E-13 -4.0297E-13  5.2840E-13 -4.3007E-13 -1.2891E-13 -1.5546E-12
 -4.3815E-13  8.0939E-13 -4.3007E-13  4.7155E-13  2.5936E-13  3.1226E-12
 -5.5245E-13  9.7693E-13 -1.2891E-13  2.5936E-13  5.6162E-13  3.8681E-12
 -6.5457E-12  1.2093E-11 -1.5546E-12  3.1226E-12  3.8681E-12  4.6653E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.164633   46.871596   -0.235312   -0.019338   -0.959360  2456984.910848
# Heliocentric elements and errors
Epoch:              2456980.5000  =  2014/11/19
Mean Anomaly:           11.83429 +/-     0.002
Argument of Peri:      313.85514 +/-     0.007
Long of Asc Node:       51.64705 +/-     0.000
Inclination:            15.41471 +/-     0.000
Eccentricity:         0.52511990 +/-    0.0001
Semi-Major Axis:     33.60504764 +/-    0.0040
Time of Perihelion: 2454641.4209 +/-       0.2
Perihelion:          15.95836845 +/-    0.0030
Aphelion:            51.25172683 +/-    0.0065
Period (y)              194.8117 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           11.79089701 +/-    0.0001
Ecliptic Y           12.93629165 +/-    0.0002
Ecliptic Z           -0.33622622 +/-    0.0000
Ecliptic XDOT        -0.00261260 +/-    0.0000
Ecliptic YDOT         0.00407217 +/-    0.0000
Ecliptic ZDOT         0.00126160 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   17.50673990 +/-    0.0001
Geocenter to KBO     16.54681247 +/-    0.0002
# Hcoef: 11.32

The following table shows the complete astrometric record for 15VZ167. 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 (15VZ167) followed by the observatory code and reference code for the source of the astrometry.

2014 11  23.41007  02 58 59.907  +15 45 33.99  23.7r 15VZ167   568  C~2lVl      
2015 08  20.54049  03 30 22.744  +19 01 10.70  24.2w 15VZ167   568  C~2lVl      
2015 10  07.55020  03 28 17.666  +19 06 21.69  24.0w 15VZ167   568  C~2lVl      
2015 10  09.53094  03 28 02.615  +19 05 59.83  24.1w 15VZ167   568  C~2lVl      
2015 11  06.30734  03 23 38.588  +18 57 29.81  23.8r 15VZ167   568  C~2lVl      
2015 11  06.37060  03 23 37.890  +18 57 28.28  23.7r 15VZ167   568  C~2lVl      
2015 11  06.44142  03 23 37.108  +18 57 26.51  23.6r 15VZ167   568  C~2lVl      
2015 11  07.46098  03 23 26.162  +18 57 02.67  24.1w 15VZ167   568  C~2lVl      
2015 11  17.44217  03 21 37.663  +18 52 59.27  23.9w 15VZ167   568  C~2lVl      
2015 12  06.33173  03 18 19.470  +18 45 25.08  24.0w 15VZ167   568  C~2lVl      
2015 12  06.46917  03 18 18.102  +18 45 22.00  24.1w 15VZ167   568  C~2lVl      
2015 12  31.35296  03 14 56.655  +18 38 29.57  24.2w 15VZ167   568  C~2lVl      
2016 01  07.38230  03 14 19.233  +18 37 40.76  24.2w 15VZ167   568  C~2lVl      
2016 02  04.34615  03 13 37.827  +18 41 00.78  24.3w 15VZ167   568  C~2lVl      
2016 02  11.23523  03 13 55.363  +18 43 33.41  24.3w 15VZ167   568  C~2lVl      
2016 09  25.63346  03 50 03.135  +21 46 19.14  24.1w 15VZ167   568  C~2lVl      
2016 10  10.57303  03 48 34.829  +21 46 31.22  24.4w 15VZ167   568  C~2lVl      
2016 10  10.62140  03 48 34.463  +21 46 30.93  24.3w 15VZ167   568  C~2lVl      
2016 10  28.44145  03 46 00.878  +21 43 52.77  24.4w 15VZ167   568  C~2lVl      
2016 10  29.51500  03 45 50.319  +21 43 38.02  24.2w 15VZ167   568  C~2lVl      
2016 11  02.56800  03 45 09.530  +21 42 37.79  24.0w 15VZ167   568  C~2lVl      
2016 12  24.36840  03 36 22.131  +21 25 38.60        15VZ167   568  C~2lVl      

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    -0.01
     2   0.7396  29284.04    -0.05    4250.06    -0.06
     3   0.8710  27609.91    -0.02    4989.59     0.01
     4   0.8764  27393.96     0.03    5020.77    -0.00
     5   0.9525  23582.87     0.15    5455.79     0.03
     6   0.9527  23572.77    -0.01    5456.80    -0.02
     7   0.9529  23561.44    -0.16    5457.87    -0.12
     8   0.9556  23403.10    -0.03    5473.77     0.00
     9   0.9830  21833.04    -0.00    5626.60     0.01
    10   1.0347  18968.18     0.00    5906.56     0.01
    11   1.0351  18948.44     0.11    5908.59    -0.02
    12   1.1032  16056.14    -0.04    6254.31     0.07
    13   1.1224  15526.92     0.05    6346.93     0.07
    14   1.1990  15009.45    -0.07    6695.88     0.13
    15   1.2179  15291.83     0.04    6777.91    -0.01
    16   1.8404  48397.33     0.05   10284.47     0.04
    17   1.8813  47134.09     0.02   10560.13     0.00
    18   1.8815  47128.78    -0.05   10560.93    -0.07
    19   1.9303  44898.93    -0.01   10866.07     0.06
    20   1.9332  44745.10    -0.04   10883.45     0.02
    21   1.9443  44150.55     0.10   10947.69    -0.12
    22   2.0861  36463.04    -0.07   11591.92    -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.

15VZ167    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        33.852    33.894    33.811
ecceobj         0.529     0.530     0.529
incobj         15.412    15.412    15.412
qmin           15.312    15.276    15.339
qmax           52.723    53.417    52.361
amean          33.462    33.946    33.140
amin           32.710    33.330    31.786
amax           34.212    34.521    33.922
emean           0.529     0.527     0.516
emin            0.503     0.503     0.480
emax            0.544     0.551     0.544
imean          13.961    14.585    14.371
imin           12.733    12.890    12.507
imax           16.585    16.469    16.324
excite_mean     0.582     0.585     0.573
fracstop        0.025     0.040     0.046
cjmean          2.631     2.629     2.646

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       160.6     134.0     156.8
kozaiamp        179.5     179.5     179.7