Orbit Fit and Astrometric record for 15VC167

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: 15VC167   
# Created Wed Feb 20 02:10:39 2019
# Orbit generated from Bernstein formalism
# Fitting   29 observations of   29
# Arc:   2.05y
# First observation: 2015/09/06
#  Last observation: 2017/09/22
Preliminary a, adot, b, bdot, g, gdot:
  -0.000115   0.028568  -0.000008  -0.000734   0.026440   0.000000
# Chi-squared of fit:     5.25 DOF:   52 RMS:  0.08
# Min/Max residuals:    -0.24    0.23
# Exact a, adot, b, bdot, g, gdot:
  1.722864E-05  2.825295E-02 -1.549177E-06 -7.288716E-04  2.633032E-02 -1.313375E-03
# Covariance matrix:
  2.5142E-13 -2.0039E-14  4.5648E-15 -4.6449E-15  1.8486E-13  2.2759E-12
 -2.0039E-14  4.1742E-13  6.0507E-15 -1.4443E-14  1.9276E-13  8.0623E-12
  4.5648E-15  6.0507E-15  1.0155E-13 -8.5395E-14  7.4647E-15  1.8490E-13
 -4.6449E-15 -1.4443E-14 -8.5395E-14  1.4085E-13 -1.1343E-14 -4.2346E-13
  1.8486E-13  1.9276E-13  7.4647E-15 -1.1343E-14  2.7866E-13  6.0034E-12
  2.2759E-12  8.0623E-12  1.8490E-13 -4.2346E-13  6.0034E-12  2.3548E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -3.390106   50.140279    0.927726   -0.023652   -0.401784  2457272.132469
# Heliocentric elements and errors
Epoch:              2457270.5000  =  2015/09/05
Mean Anomaly:          333.34824 +/-     0.147
Argument of Peri:      280.18248 +/-     0.208
Long of Asc Node:      163.81174 +/-     0.011
Inclination:             3.70135 +/-     0.000
Eccentricity:         0.14083313 +/-    0.0003
Semi-Major Axis:     43.67378128 +/-    0.0052
Time of Perihelion: 2465075.1420 +/-      43.0
Perihelion:          37.52306610 +/-    0.0153
Aphelion:            49.82449647 +/-    0.0158
Period (y)              288.6286 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           25.26456235 +/-    0.0005
Ecliptic Y           28.81644091 +/-    0.0006
Ecliptic Z           -2.24590218 +/-    0.0000
Ecliptic XDOT        -0.00234720 +/-    0.0000
Ecliptic YDOT         0.00176834 +/-    0.0000
Ecliptic ZDOT        -0.00006753 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.38918407 +/-    0.0005
Geocenter to KBO     37.97902985 +/-    0.0008
# Hcoef:  8.54

The following table shows the complete astrometric record for 15VC167. 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 (15VC167) followed by the observatory code and reference code for the source of the astrometry.

2015 09  06.63168  03 14 32.133  +14 30 36.51  24.7w 15VC167   568  C~2lVh      
2015 09  12.52133  03 14 22.416  +14 29 25.32  24.3w 15VC167   568  C~2lVh      
2015 10  07.45992  03 13 07.115  +14 22 28.88  24.4w 15VC167   568  C~2lVh      
2015 10  08.46335  03 13 03.076  +14 22 08.97  24.4w 15VC167   568  C~2lVh      
2015 10  08.52236  03 13 02.844  +14 22 07.75  24.5w 15VC167   568  C~2lVh      
2015 11  07.36952  03 10 39.983  +14 11 22.51  24.1r 15VC167   568  C~2lVh      
2015 11  07.41164  03 10 39.763  +14 11 21.54  24.2r 15VC167   568  C~2lVh      
2015 11  07.45387  03 10 39.544  +14 11 20.68  24.2r 15VC167   568  C~2lVh      
2015 11  10.54061  03 10 23.278  +14 10 12.86  23.3w 15VC167   568  C~2lVh      
2015 11  17.38710  03 09 47.249  +14 07 45.17  24.4w 15VC167   568  C~2lVh      
2015 11  17.43381  03 09 46.995  +14 07 44.11  24.5w 15VC167   568  C~2lVh      
2015 12  06.39596  03 08 11.560  +14 01 36.41  24.5w 15VC167   568  C~2lVh      
2015 12  13.33048  03 07 40.207  +13 59 44.46  24.4w 15VC167   568  C~2lVh      
2015 12  13.38903  03 07 39.944  +13 59 43.55  24.3w 15VC167   568  C~2lVh      
2016 01  01.38342  03 06 30.520  +13 56 04.03  24.5w 15VC167   568  C~2lVh      
2016 01  02.34977  03 06 27.768  +13 55 56.81  24.5w 15VC167   568  C~2lVh      
2016 01  07.33018  03 06 14.871  +13 55 25.34  24.7w 15VC167   568  C~2lVh      
2016 02  05.27611  03 05 49.164  +13 56 04.44  24.5w 15VC167   568  C~2lVh      
2016 02  10.29646  03 05 53.748  +13 56 49.93  24.5w 15VC167   568  C~2lVh      
2016 09  26.59251  03 20 17.229  +14 48 41.97  24.5w 15VC167   568  C~2lVh      
2016 10  10.39652  03 19 26.673  +14 44 29.38  24.7w 15VC167   568  C~2lVh      
2016 10  10.45485  03 19 26.425  +14 44 28.28  24.6w 15VC167   568  C~2lVh      
2016 11  02.54312  03 17 36.799  +14 36 23.56  24.5w 15VC167   568  C~2lVh      
2016 11  04.41826  03 17 27.060  +14 35 43.02  24.4w 15VC167   568  C~2lVh      
2016 12  29.38526  03 13 07.956  +14 20 06.15  24.9w 15VC167   568  C~2lVh      
2017 01  02.39267  03 12 55.626  +14 19 33.58  24.5w 15VC167   568  C~2lVh      
2017 01  26.31474  03 12 13.853  +14 18 42.88  24.8w 15VC167   568  C~2lVh      
2017 09  15.59463  03 27 21.236  +15 13 49.14  24.6w 15VC167   568  C~2lVh      
2017 09  22.58081  03 27 05.048  +15 12 12.79  24.6w 15VC167   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    -0.05       0.00     0.23
  2   0.0161   -154.88    -0.05     -31.50     0.00
  3   0.0844  -1319.92     0.01    -144.19    -0.02
  4   0.0872  -1381.79    -0.02    -147.84    -0.01
  5   0.0873  -1385.36     0.15    -148.12    -0.10
  6   0.1690  -3559.23    -0.02    -217.41    -0.07
  7   0.1691  -3562.58     0.03    -217.49    -0.13
  8   0.1693  -3565.88     0.14    -217.47    -0.09
  9   0.1777  -3812.03    -0.24    -219.54     0.14
 10   0.1965  -4356.70     0.04    -221.41     0.03
 11   0.1966  -4360.54    -0.04    -221.44    -0.02
 12   0.2485  -5797.68     0.04    -201.93     0.02
 13   0.2675  -6267.66     0.11    -186.43    -0.04
 14   0.2676  -6271.59     0.04    -186.27    -0.05
 15   0.3196  -7304.96    -0.13    -123.65    -0.02
 16   0.3223  -7345.54    -0.00    -119.71     0.06
 17   0.3359  -7535.03    -0.07     -98.95     0.08
 18   0.4152  -7885.02    -0.05      40.62     0.02
 19   0.4289  -7808.31     0.11      66.23    -0.01
 20   1.0567   5118.85     0.02    -255.48     0.06
 21   1.0945   4344.86     0.00    -310.61    -0.05
 22   1.0947   4341.10    -0.00    -310.75    -0.01
 23   1.1579   2678.59    -0.05    -366.73    -0.01
 24   1.1630   2531.52    -0.01    -369.09    -0.02
 25   1.3135  -1345.94     0.04    -285.06    -0.05
 26   1.3245  -1527.37     0.04    -268.99    -0.04
 27   1.3900  -2126.23    -0.05    -156.75     0.08
 28   2.0259  11453.75    -0.06    -354.06     0.03
 29   2.0450  11202.05     0.07    -388.92     0.01

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.

15VC167    quality flag:3

Type:         7:4EEE    7:4EEE    7:4EEE

axisobj        44.123    44.133    44.112
ecceobj         0.146     0.146     0.146
incobj          3.691     3.691     3.691
qmin           37.120    37.048    37.111
qmax           50.740    50.820    50.722
amean          43.727    43.727    43.727
amin           43.321    43.326    43.323
amax           44.160    44.162    44.157
emean           0.123     0.127     0.121
emin            0.090     0.098     0.087
emax            0.150     0.151     0.149
imean           4.784     4.469     4.913
imin            3.058     2.857     3.097
imax            6.893     6.366     7.118
excite_mean     0.150     0.150     0.150
fracstop        1.000     1.000     1.000
cjmean          3.071     3.071     3.071

libcent 0       186.9     181.0     184.9
libamp  0        95.7      92.1      91.0
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       266.7     266.5     266.6
kozaiamp         52.4      48.8      54.2