Orbit Fit and Astrometric record for 15VQ165

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: 15VQ165   
# Created Thu Dec  9 02:13:34 2021
# Orbit generated from Bernstein formalism
# Fitting     41 observations of     41
# Arc:   3.08y
# First observation: 2014/11/17
#  Last observation: 2017/12/16
Preliminary a, adot, b, bdot, g, gdot:
  -0.000342   0.024456   0.000105  -0.008442   0.026405   0.000000
# Chi-squared of fit:     6.60 DOF:     76 RMS:  0.07
# Min/Max residuals:    -0.32    0.15
# Exact a, adot, b, bdot, g, gdot:
  1.439480E-05  2.405415E-02 -4.971942E-06 -8.323310E-03  2.628436E-02 -7.469879E-03
# Covariance matrix:
  2.3408E-13 -2.5806E-13 -2.9173E-14  5.9080E-14 -1.1074E-13 -2.4605E-12
 -2.5806E-13  3.9042E-13  5.3452E-14 -1.0812E-13  1.9456E-13  4.5046E-12
 -2.9173E-14  5.3452E-14  1.4406E-13 -9.5505E-14  3.0677E-14  7.3129E-13
  5.9080E-14 -1.0812E-13 -9.5505E-14  9.6460E-14 -6.3342E-14 -1.4786E-12
 -1.1074E-13  1.9456E-13  3.0677E-14 -6.3342E-14  1.9553E-13  2.6220E-12
 -2.4605E-12  4.5046E-12  7.3129E-13 -1.4786E-12  2.6220E-12  6.1611E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.376618   48.140976   -0.108909   -0.023481   -0.983183  2456978.777218
# Heliocentric elements and errors
Epoch:              2456970.5000  =  2014/11/09
Mean Anomaly:          287.76382 +/-     0.035
Argument of Peri:      288.83773 +/-     0.015
Long of Asc Node:      224.42690 +/-     0.000
Inclination:            19.10502 +/-     0.001
Eccentricity:         0.28148069 +/-    0.0003
Semi-Major Axis:     39.35181102 +/-    0.0072
Time of Perihelion: 2475062.9677 +/-       7.1
Perihelion:          28.27503594 +/-    0.0123
Aphelion:            50.42858609 +/-    0.0144
Period (y)              246.8626 +/-      0.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           25.95248103 +/-    0.0004
Ecliptic Y           29.13423756 +/-    0.0005
Ecliptic Z           -0.91421372 +/-    0.0000
Ecliptic XDOT        -0.00240334 +/-    0.0000
Ecliptic YDOT         0.00107213 +/-    0.0000
Ecliptic ZDOT        -0.00084793 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.02782158 +/-    0.0005
Geocenter to KBO     38.04543865 +/-    0.0006
# Hcoef:  8.16

The following table shows the complete astrometric record for 15VQ165. 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 (15VQ165) followed by the observatory code and reference code for the source of the astrometry.

2014 11  17.27644  03 04 18.669  +15 54 37.22  24.2r 15VQ165   568  C~2lVb      
2014 11  17.38513  03 04 18.090  +15 54 34.36  24.1r 15VQ165   568  C~2lVb      
2014 11  17.49897  03 04 17.487  +15 54 31.42  24.2r 15VQ165   568  C~2lVb      
2014 11  19.28749  03 04 08.138  +15 53 44.49  24.1r 15VQ165   568  C~2lVb      
2014 11  23.39103  03 03 46.877  +15 51 58.14  23.8r 15VQ165   568  C~2lVb      
2015 08  11.59273  03 15 16.284  +16 19 41.91  24.4w 15VQ165   568  C~2lVb      
2015 09  06.62350  03 15 13.722  +16 16 15.81        15VQ165   568  C~2lVb      
2015 09  06.62757  03 15 13.728  +16 16 15.68  24.6w 15VQ165   568  C~2lVb      
2015 09  12.51723  03 15 03.745  +16 14 52.86  24.6w 15VQ165   568  C~2lVb      
2015 10  07.45292  03 13 47.308  +16 06 56.33  24.2w 15VQ165   568  C~2lVb      
2015 10  08.45753  03 13 43.218  +16 06 33.50  24.3w 15VQ165   568  C~2lVb      
2015 10  08.51654  03 13 42.966  +16 06 32.08  24.2w 15VQ165   568  C~2lVb      
2015 11  07.36426  03 11 18.566  +15 54 00.81  24.0r 15VQ165   568  C~2lVb      
2015 11  07.40638  03 11 18.338  +15 53 59.70  24.0r 15VQ165   568  C~2lVb      
2015 11  07.44859  03 11 18.114  +15 53 58.56  24.0r 15VQ165   568  C~2lVb      
2015 11  10.53471  03 11 01.690  +15 52 37.12  24.0w 15VQ165   568  C~2lVb      
2015 11  17.38127  03 10 25.229  +15 49 37.80  23.8w 15VQ165   568  C~2lVb      
2015 11  17.42797  03 10 24.975  +15 49 36.57  24.1w 15VQ165   568  C~2lVb      
2015 12  06.39016  03 08 48.281  +15 41 48.57  24.3w 15VQ165   568  C~2lVb      
2015 12  13.32462  03 08 16.433  +15 39 15.60  24.2w 15VQ165   568  C~2lVb      
2015 12  13.38310  03 08 16.167  +15 39 14.36  24.3w 15VQ165   568  C~2lVb      
2016 01  07.32440  03 06 49.175  +15 32 13.14  24.2w 15VQ165   568  C~2lVb      
2016 02  04.30735  03 06 20.563  +15 29 24.48  24.0w 15VQ165   568  C~2lVb      
2016 02  04.31413  03 06 20.571  +15 29 24.45  24.3w 15VQ165   568  C~2lVb      
2016 02  04.32117  03 06 20.580  +15 29 24.13  24.2w 15VQ165   568  C~2lVb      
2016 02  04.32803  03 06 20.581  +15 29 24.39  24.3w 15VQ165   568  C~2lVb      
2016 02  05.26985  03 06 21.061  +15 29 24.76  24.4w 15VQ165   568  C~2lVb      
2016 02  10.29068  03 06 25.218  +15 29 33.85  24.2w 15VQ165   568  C~2lVb      
2016 09  06.59240  03 21 19.915  +16 10 04.59  24.3w 15VQ165   568  C~2lVb      
2016 09  26.58845  03 20 34.081  +16 04 29.96  24.4w 15VQ165   568  C~2lVb      
2016 10  10.39070  03 19 42.670  +15 59 31.40  24.1w 15VQ165   568  C~2lVb      
2016 10  10.44903  03 19 42.421  +15 59 30.06  24.3w 15VQ165   568  C~2lVb      
2016 11  02.54892  03 17 51.158  +15 49 53.97  24.1w 15VQ165   568  C~2lVb      
2016 11  04.42405  03 17 41.288  +15 49 05.31  24.2w 15VQ165   568  C~2lVb      
2016 12  24.30148  03 13 36.008  +15 29 54.44  24.3w 15VQ165   568  C~2lVb      
2017 01  02.40371  03 13 05.352  +15 27 35.17  24.4w 15VQ165   568  C~2lVb      
2017 01  26.29235  03 12 21.862  +15 24 11.08  24.2w 15VQ165   568  C~2lVb      
2017 01  26.30729  03 12 21.855  +15 24 11.15  24.3w 15VQ165   568  C~2lVb      
2017 09  16.63393  03 27 15.271  +16 00 48.81        15VQ165   568  C~2lVb      
2017 09  21.62152  03 27 03.338  +15 59 21.34  24.3w 15VQ165   568  C~2lVb      
2017 12  16.35462  03 20 21.894  +15 26 01.22  24.0w 15VQ165   568  C~2lVb      

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    -0.01
     2   0.0003     -8.82     0.01      -0.44    -0.02
     3   0.0006    -17.99     0.09      -0.87     0.02
     4   0.0055   -160.57    -0.05      -8.73     0.04
     5   0.0167   -484.76    -0.02     -26.15     0.02
     6   0.7319   9537.92    -0.03   -1107.16     0.05
     7   0.8031   9447.91    -0.17   -1296.47     0.12
     8   0.8032   9447.96    -0.02   -1296.62    -0.00
     9   0.8193   9287.14     0.02   -1338.67     0.01
    10   0.8875   8097.11    -0.01   -1507.26     0.08
    11   0.8903   8034.13    -0.02   -1513.65     0.06
    12   0.8905   8030.25    -0.10   -1514.05     0.00
    13   0.9722   5820.73     0.11   -1683.02    -0.01
    14   0.9723   5817.26     0.09   -1683.21    -0.01
    15   0.9724   5813.84     0.14   -1683.44    -0.05
    16   0.9809   5563.53    -0.01   -1698.34    -0.03
    17   0.9996   5008.20     0.04   -1729.69     0.00
    18   0.9997   5004.34     0.02   -1729.89    -0.01
    19   1.0516   3533.27    -0.01   -1803.60     0.07
    20   1.0706   3048.93     0.05   -1826.08    -0.02
    21   1.0708   3044.89     0.00   -1826.23    -0.01
    22   1.1391   1720.61    -0.06   -1889.20     0.04
    23   1.2157   1276.67    -0.13   -1938.35     0.06
    24   1.2157   1276.78    -0.06   -1938.41     0.01
    25   1.2157   1276.81    -0.07   -1938.76    -0.32
    26   1.2157   1276.90    -0.02   -1938.51    -0.06
    27   1.2183   1283.67    -0.03   -1940.05    -0.13
    28   1.2321   1343.96     0.14   -1947.76     0.00
    29   1.8051  14462.56     0.04   -3029.67    -0.01
    30   1.8599  13734.93    -0.02   -3183.57    -0.05
    31   1.8976  12938.50     0.03   -3280.88    -0.01
    32   1.8978  12934.67     0.06   -3281.25    -0.02
    33   1.9610  11229.18    -0.08   -3420.88    -0.08
    34   1.9662  11078.53     0.05   -3430.70    -0.00
    35   2.1027   7349.91     0.05   -3607.95    -0.07
    36   2.1277   6885.05    -0.06   -3624.32     0.08
    37   2.1931   6223.81    -0.03   -3653.31     0.04
    38   2.1931   6223.73     0.04   -3653.22     0.15
    39   2.8319  19312.01    -0.08   -4872.90    -0.06
    40   2.8456  19121.93     0.07   -4914.66    -0.03
    41   3.0803  12968.59    -0.00   -5374.20     0.13

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.

15VQ165    quality flag:3

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

axisobj        39.528    39.546    39.510
ecceobj         0.277     0.277     0.276
incobj         19.034    19.034    19.035
qmin           27.454    27.389    27.758
qmax           51.988    52.098    51.853
amean          39.454    39.454    39.455
amin           38.981    38.993    38.987
amax           40.012    40.023    40.029
emean           0.252     0.250     0.247
emin            0.185     0.187     0.186
emax            0.301     0.304     0.295
imean          21.041    21.101    21.308
imin           19.175    19.016    19.548
imax           23.091    23.001    23.123
excite_mean     0.440     0.440     0.440
fracstop        1.000     1.000     1.000
cjmean          2.829     2.829     2.828

libcent 0       180.3     179.8     180.0
libamp  0        99.9      91.9     108.8
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       273.8     274.7     270.6
kozaiamp         53.6      51.6      54.7