Orbit Fit and Astrometric record for 15VO164

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: 15VO164   
# Created Fri Dec  3 02:13:35 2021
# Orbit generated from Bernstein formalism
# Fitting     35 observations of     35
# Arc:   4.52y
# First observation: 2015/08/11
#  Last observation: 2020/02/18
Preliminary a, adot, b, bdot, g, gdot:
   0.000103   0.048490   0.000099   0.012026   0.036833   0.000000
# Chi-squared of fit:     2.84 DOF:     64 RMS:  0.05
# Min/Max residuals:    -0.15    0.21
# Exact a, adot, b, bdot, g, gdot:
  2.165750E-05  4.779154E-02  5.233718E-06  1.192202E-02  3.614111E-02  3.189926E-04
# Covariance matrix:
  1.4108E-13 -5.6274E-14  1.0020E-14 -1.8836E-14  6.9734E-14 -3.6272E-13
 -5.6274E-14  2.6115E-13 -2.7601E-14  7.2714E-14  9.8520E-14  1.4546E-12
  1.0020E-14 -2.7601E-14  6.9485E-14 -4.0950E-14 -4.4996E-15 -1.9833E-13
 -1.8836E-14  7.2714E-14 -4.0950E-14  6.2746E-14  2.0254E-14  5.0193E-13
  6.9734E-14  9.8520E-14 -4.4996E-15  2.0254E-14  1.3328E-13  4.2084E-13
 -3.6272E-13  1.4546E-12 -1.9833E-13  5.0193E-13  4.2084E-13  1.0003E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.656777   49.663799    1.015695    0.001017    0.019165  2457246.131409
# Heliocentric elements and errors
Epoch:              2457240.5000  =  2015/08/06
Mean Anomaly:          356.08026 +/-     0.008
Argument of Peri:      356.68889 +/-     0.016
Long of Asc Node:       58.15511 +/-     0.000
Inclination:            14.16857 +/-     0.000
Eccentricity:         0.30142975 +/-    0.0000
Semi-Major Axis:     39.52315699 +/-    0.0023
Time of Perihelion: 2458228.6681 +/-       2.1
Perihelion:          27.60970168 +/-    0.0021
Aphelion:            51.43661230 +/-    0.0032
Period (y)              248.4767 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           18.64813896 +/-    0.0002
Ecliptic Y           20.39640407 +/-    0.0002
Ecliptic Z           -1.28238080 +/-    0.0000
Ecliptic XDOT        -0.00271904 +/-    0.0000
Ecliptic YDOT         0.00238736 +/-    0.0000
Ecliptic ZDOT         0.00090111 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   27.66606019 +/-    0.0002
Geocenter to KBO     27.66931950 +/-    0.0003
# Hcoef:  8.66

The following table shows the complete astrometric record for 15VO164. 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 (15VO164) followed by the observatory code and reference code for the source of the astrometry.

2015 08  11.63062  03 11 50.000  +15 05 28.18  22.8w 15VO164   568  C~2lVX      
2015 08  12.57765  03 11 51.749  +15 05 35.91  23.3w 15VO164   568  C~2lVX      
2015 09  07.53691  03 11 49.248  +15 05 54.78  23.5w 15VO164   568  C~2lVX      
2015 09  12.53366  03 11 37.993  +15 05 17.82  23.5w 15VO164   568  C~2lVX      
2015 10  07.47747  03 09 55.676  +14 59 30.67  23.1w 15VO164   568  C~2lVX      
2015 10  08.48165  03 09 50.150  +14 59 12.01  23.0w 15VO164   568  C~2lVX      
2015 10  08.53987  03 09 49.827  +14 59 10.90  23.1w 15VO164   568  C~2lVX      
2015 10  08.55151  03 09 49.758  +14 59 10.67  23.1w 15VO164   568  C~2lVX      
2015 10  08.56473  03 09 49.684  +14 59 10.43  23.2w 15VO164   568  C~2lVX      
2015 11  06.29678  03 06 42.071  +14 48 53.47  23.0r 15VO164   568  C~2lVX      
2015 11  06.36009  03 06 41.615  +14 48 52.08  22.8r 15VO164   568  C~2lVX      
2015 11  06.43072  03 06 41.096  +14 48 50.41  22.8r 15VO164   568  C~2lVX      
2015 11  06.50005  03 06 40.592  +14 48 48.92  22.9r 15VO164   568  C~2lVX      
2015 11  07.51946  03 06 33.295  +14 48 25.79  23.0w 15VO164   568  C~2lVX      
2015 11  17.28542  03 05 23.229  +14 44 48.77  23.4w 15VO164   568  C~2lVX      
2015 11  17.33469  03 05 22.868  +14 44 47.67  23.1w 15VO164   568  C~2lVX      
2015 12  13.34802  03 02 31.210  +14 36 53.67  23.4w 15VO164   568  C~2lVX      
2015 12  13.40657  03 02 30.867  +14 36 52.90  23.4w 15VO164   568  C~2lVX      
2016 01  01.40134  03 01 00.304  +14 34 04.44  23.5w 15VO164   568  C~2lVX      
2016 02  04.27768  03 00 15.277  +14 37 51.85  23.6w 15VO164   568  C~2lVX      
2016 02  10.26747  03 00 24.822  +14 39 46.95  23.4w 15VO164   568  C~2lVX      
2016 09  07.56206  03 22 12.434  +16 29 34.32        15VO164   568  C~2lVX      
2016 09  26.62090  03 21 16.095  +16 27 05.74  23.5w 15VO164   568  C~2lVX      
2016 10  10.39070  03 20 08.310  +16 23 46.86  23.5w 15VO164   568  C~2lVX      
2016 10  10.44903  03 20 07.979  +16 23 45.93  23.5w 15VO164   568  C~2lVX      
2016 10  27.49679  03 18 20.651  +16 18 26.17  23.4w 15VO164   568  C~2lVX      
2016 11  02.60285  03 17 37.995  +16 16 19.86  23.1w 15VO164   568  C~2lVX      
2016 11  03.52184  03 17 31.467  +16 16 00.67  23.4w 15VO164   568  C~2lVX      
2016 12  24.30148  03 11 55.791  +16 01 13.97  23.3w 15VO164   568  C~2lVX      
2017 01  02.37586  03 11 16.115  +16 00 09.20  23.4w 15VO164   568  C~2lVX      
2017 01  02.40371  03 11 16.001  +16 00 09.08  23.5w 15VO164   568  C~2lVX      
2017 01  26.27054  03 10 23.908  +16 00 57.68  23.6w 15VO164   568  C~2lVX      
2017 01  26.29235  03 10 23.899  +16 00 57.89  23.7w 15VO164   568  C~2lVX      
2020 02  18.108990 03 42 07.789  +20 08 16.23  23.2G 15VO164   G37  C~3jl6      
2020 02  18.228000 03 42 07.983  +20 08 17.63        15VO164   G37  C~3jl6      

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    -0.15       0.00    -0.00
     2   0.0026     26.47     0.21       0.70    -0.10
     3   0.0737     -3.40    -0.10      28.54     0.01
     4   0.0873   -170.36    -0.07      36.41     0.01
     5   0.1556  -1691.40    -0.01      98.89    -0.01
     6   0.1584  -1773.55    -0.01     102.44     0.02
     7   0.1585  -1778.35     0.10     102.63    -0.03
     8   0.1586  -1779.38     0.06     102.68    -0.03
     9   0.1586  -1780.48     0.07     102.74    -0.03
    10   0.2373  -4566.24    -0.01     244.59     0.04
    11   0.2375  -4572.98     0.04     245.05     0.05
    12   0.2376  -4580.68    -0.06     245.49    -0.00
    13   0.2378  -4588.12    -0.02     246.05     0.08
    14   0.2406  -4696.30    -0.02     252.61     0.03
    15   0.2674  -5733.84     0.06     321.32     0.01
    16   0.2675  -5739.18    -0.00     321.70    -0.02
    17   0.3387  -8267.22    -0.03     551.62    -0.01
    18   0.3389  -8272.22    -0.01     552.26     0.02
    19   0.3909  -9584.45    -0.04     755.51     0.02
    20   0.4836 -10150.10    -0.02    1156.61    -0.01
    21   0.5000  -9984.58     0.05    1228.55    -0.08
    22   1.0758   9997.28    -0.03    2530.44     0.03
    23   1.1280   9173.98     0.02    2593.53    -0.00
    24   1.1657   8178.49    -0.04    2651.28    -0.04
    25   1.1658   8173.64     0.02    2651.61    -0.03
    26   1.2125   6596.52     0.02    2741.29     0.00
    27   1.2292   5970.00    -0.03    2778.68     0.00
    28   1.2317   5874.16    -0.00    2784.59     0.04
    29   1.3708    972.77     0.06    3202.66    -0.01
    30   1.3956    404.11     0.02    3292.94    -0.02
    31   1.3957    402.49    -0.04    3293.27     0.02
    32   1.4610   -308.25    -0.04    3541.30     0.04
    33   1.4611   -308.32     0.01    3541.53     0.04
    34   4.5215  29909.49     0.06   11237.16    -0.05
    35   4.5218  29912.54    -0.05   11237.92     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.

15VO164    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.969    39.978    39.960
ecceobj         0.308     0.308     0.308
incobj         14.140    14.140    14.140
qmin           26.637    26.655    26.624
qmax           52.987    52.863    52.877
amean          39.454    39.454    39.455
amin           38.979    38.976    38.989
amax           40.046    40.044    40.020
emean           0.304     0.304     0.304
emin            0.284     0.283     0.284
emax            0.324     0.322     0.325
imean          12.381    12.410    12.355
imin           11.489    11.491    11.461
imax           13.265    13.264    13.265
excite_mean     0.372     0.372     0.372
fracstop        1.000     1.000     1.000
cjmean          2.894     2.894     2.894

libcent 0       180.2     178.7     180.2
libamp  0        79.6      83.6      76.5
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       169.3     168.8     169.1
kozaiamp        180.0     180.0     180.0