Orbit Fit and Astrometric record for 15VC165

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: 15VC165   
# Created Sat Dec  4 02:13:37 2021
# Orbit generated from Bernstein formalism
# Fitting     30 observations of     30
# Arc:   2.27y
# First observation: 2015/09/07
#  Last observation: 2017/12/13
Preliminary a, adot, b, bdot, g, gdot:
  -0.000129   0.030476  -0.000003  -0.007235   0.028395   0.000000
# Chi-squared of fit:     7.05 DOF:     54 RMS:  0.09
# Min/Max residuals:    -0.20    0.20
# Exact a, adot, b, bdot, g, gdot:
  1.622533E-05  3.023379E-02 -4.368661E-06 -7.190668E-03  2.831721E-02  1.940345E-03
# Covariance matrix:
  1.9888E-13 -2.8307E-14  4.4170E-15 -1.7682E-14  1.2541E-13  1.2209E-12
 -2.8307E-14  3.6672E-13  2.6245E-14 -1.0086E-13  2.2234E-13  6.8770E-12
  4.4170E-15  2.6245E-14  1.2676E-13 -9.6854E-14  2.0172E-14  6.8101E-13
 -1.7682E-14 -1.0086E-13 -9.6854E-14  1.3764E-13 -7.8399E-14 -2.6139E-12
  1.2541E-13  2.2234E-13  2.0172E-14 -7.8399E-14  2.7997E-13  5.3644E-12
  1.2209E-12  6.8770E-12  6.8101E-13 -2.6139E-12  5.3644E-12  1.7815E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.422431   52.005406    0.933733    0.003008   -0.387759  2457273.129809
# Heliocentric elements and errors
Epoch:              2457270.5000  =  2015/09/05
Mean Anomaly:           18.79291 +/-     0.199
Argument of Peri:      155.29540 +/-     0.248
Long of Asc Node:      232.26928 +/-     0.000
Inclination:            13.36627 +/-     0.001
Eccentricity:         0.09814567 +/-    0.0002
Semi-Major Axis:     39.31887273 +/-    0.0027
Time of Perihelion: 2452569.4854 +/-      49.7
Perihelion:          35.45989567 +/-    0.0082
Aphelion:            43.17784978 +/-    0.0084
Period (y)              246.5527 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           22.70891482 +/-    0.0004
Ecliptic Y           27.55979468 +/-    0.0005
Ecliptic Z            0.26021617 +/-    0.0000
Ecliptic XDOT        -0.00218688 +/-    0.0000
Ecliptic YDOT         0.00194492 +/-    0.0000
Ecliptic ZDOT        -0.00069377 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   35.71141005 +/-    0.0005
Geocenter to KBO     35.31421856 +/-    0.0007
# Hcoef:  9.68

The following table shows the complete astrometric record for 15VC165. 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 (15VC165) followed by the observatory code and reference code for the source of the astrometry.

2015 09  07.62902  03 17 53.838  +18 40 36.96  25.4w 15VC165   568  C~2lVZ      
2015 09  12.49264  03 17 45.473  +18 39 47.73  26.9w 15VC165   568  C~2lVZ      
2015 10  07.53854  03 16 25.573  +18 33 10.77  25.4w 15VC165   568  C~2lVZ      
2015 10  09.57780  03 16 16.693  +18 32 28.85  25.5w 15VC165   568  C~2lVZ      
2015 11  07.33264  03 13 47.158  +18 20 55.03  25.0r 15VC165   568  C~2lVZ      
2015 11  07.37479  03 13 46.922  +18 20 53.85  25.1r 15VC165   568  C~2lVZ      
2015 11  07.41697  03 13 46.673  +18 20 52.69  25.0r 15VC165   568  C~2lVZ      
2015 11  10.49950  03 13 29.050  +18 19 30.99  24.9w 15VC165   568  C~2lVZ      
2015 11  17.34635  03 12 49.784  +18 16 28.13  25.4w 15VC165   568  C~2lVZ      
2015 11  17.39294  03 12 49.508  +18 16 26.97  25.2w 15VC165   568  C~2lVZ      
2016 01  01.34294  03 09 14.527  +17 58 53.00  25.3w 15VC165   568  C~2lVZ      
2016 01  08.25043  03 08 54.859  +17 57 02.08  25.4w 15VC165   568  C~2lVZ      
2016 02  05.28189  03 08 28.744  +17 53 06.65  25.4w 15VC165   568  C~2lVZ      
2016 09  07.57363  03 25 22.679  +18 42 54.47        15VC165   568  C~2lVZ      
2016 09  27.51061  03 24 35.211  +18 38 37.41  25.8w 15VC165   568  C~2lVZ      
2016 10  05.48792  03 24 05.577  +18 36 15.07  25.2w 15VC165   568  C~2lVZ      
2016 10  07.49247  03 23 57.313  +18 35 36.02  25.5w 15VC165   568  C~2lVZ      
2016 10  07.58817  03 23 56.887  +18 35 34.07  25.3w 15VC165   568  C~2lVZ      
2016 10  09.49252  03 23 48.748  +18 34 56.24  25.8w 15VC165   568  C~2lVZ      
2016 11  02.50259  03 21 47.041  +18 25 42.91  25.4w 15VC165   568  C~2lVZ      
2016 11  04.47870  03 21 35.935  +18 24 53.04  25.1w 15VC165   568  C~2lVZ      
2016 12  24.32550  03 17 12.965  +18 04 49.34  25.4w 15VC165   568  C~2lVZ      
2016 12  28.42845  03 16 57.204  +18 03 32.46  26.1w 15VC165   568  C~2lVZ      
2017 01  02.42780  03 16 40.014  +18 02 06.07  25.1w 15VC165   568  C~2lVZ      
2017 01  26.34230  03 15 53.584  +17 57 31.96  25.0w 15VC165   568  C~2lVZ      
2017 01  27.27995  03 15 53.065  +17 57 26.36  25.6w 15VC165   568  C~2lVZ      
2017 09  16.60340  03 32 36.643  +18 42 38.88  25.7w 15VC165   568  C~2lVZ      
2017 09  23.54254  03 32 19.647  +18 41 06.25  24.9w 15VC165   568  C~2lVZ      
2017 12  13.39064  03 25 36.231  +18 11 10.91  25.5w 15VC165   568  C~2lVZ      
2017 12  13.42791  03 25 36.045  +18 11 10.10  25.5w 15VC165   568  C~2lVZ      

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     0.14       0.00     0.07
     2   0.0133   -127.56    -0.05     -16.82    -0.16
     3   0.0819  -1327.53     0.10    -105.35     0.03
     4   0.0875  -1460.38     0.08    -112.92    -0.03
     5   0.1662  -3696.03    -0.08    -224.30     0.11
     6   0.1663  -3699.59     0.01    -224.55     0.00
     7   0.1664  -3703.31    -0.06    -224.74    -0.03
     8   0.1749  -3967.00     0.05    -237.25    -0.04
     9   0.1936  -4554.91    -0.10    -265.51    -0.03
    10   0.1937  -4559.01    -0.14    -265.59     0.06
    11   0.3168  -7796.91     0.15    -461.21     0.03
    12   0.3357  -8097.53    -0.03    -492.23     0.04
    13   0.4125  -8520.75     0.02    -618.12     0.04
    14   1.0019   6205.97     0.00   -1483.61    -0.04
    15   1.0565   5488.11    -0.01   -1564.65    -0.03
    16   1.0783   5044.37    -0.11   -1597.23     0.10
    17   1.0838   4920.78     0.05   -1605.64    -0.05
    18   1.0841   4914.42    -0.14   -1606.01    -0.06
    19   1.0893   4792.85     0.12   -1613.65     0.17
    20   1.1550   2977.38    -0.02   -1712.96     0.02
    21   1.1604   2811.81    -0.02   -1721.14     0.01
    22   1.2969  -1118.11    -0.14   -1923.80    -0.20
    23   1.3081  -1355.14     0.20   -1939.71     0.06
    24   1.3218  -1614.36    -0.18   -1959.42    -0.02
    25   1.3873  -2325.38     0.07   -2051.48    -0.13
    26   1.3899  -2333.99     0.03   -2054.95    -0.05
    27   2.0259  12195.06    -0.03   -3002.94    -0.03
    28   2.0449  11937.55     0.04   -3035.19     0.00
    29   2.2663   5920.21     0.00   -3376.49     0.07
    30   2.2664   5917.44     0.04   -3376.61     0.07

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.

15VC165    quality flag:3

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

axisobj        39.712    39.725    39.700
ecceobj         0.108     0.108     0.107
incobj         13.321    13.321    13.321
qmin           34.626    34.565    34.624
qmax           44.652    44.567    44.631
amean          39.459    39.460    39.459
amin           39.114    39.125    39.108
amax           39.844    39.824    39.848
emean           0.095     0.095     0.095
emin            0.071     0.070     0.068
emax            0.121     0.122     0.122
imean          14.732    14.725    14.739
imin           14.059    14.026    14.069
imax           15.407    15.411    15.414
excite_mean     0.272     0.272     0.272
fracstop        1.000     1.000     1.000
cjmean          2.967     2.967     2.967

libcent 0       180.6     180.2     179.9
libamp  0        60.4      53.0      65.5
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       180.2     179.9     179.8
kozaiamp        179.9     179.9     180.0