Orbit Fit and Astrometric record for 15VT166

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: 15VT166   
# Created Thu Apr 18 01:10:38 2019
# Orbit generated from Bernstein formalism
# Fitting   33 observations of   33
# Arc:   2.27y
# First observation: 2015/09/07
#  Last observation: 2017/12/13
Preliminary a, adot, b, bdot, g, gdot:
  -0.000072   0.024092  -0.000016   0.003398   0.024497   0.000000
# Chi-squared of fit:     7.72 DOF:   60 RMS:  0.09
# Min/Max residuals:    -0.27    0.20
# Exact a, adot, b, bdot, g, gdot:
  1.526427E-05  2.375935E-02  1.853504E-06  3.331449E-03  2.433981E-02 -4.238166E-03
# Covariance matrix:
  1.7054E-13 -2.8063E-14 -7.6386E-16  7.3602E-15  1.0388E-13  1.0434E-12
 -2.8063E-14  3.2745E-13 -1.4465E-14  5.9026E-14  1.9108E-13  8.3179E-12
 -7.6386E-16 -1.4465E-14  1.0711E-13 -7.2556E-14 -8.9760E-15 -4.8714E-13
  7.3602E-15  5.9026E-14 -7.2556E-14  8.9918E-14  4.1983E-14  1.9648E-12
  1.0388E-13  1.9108E-13 -8.9760E-15  4.1983E-14  2.3692E-13  5.9239E-12
  1.0434E-12  8.3179E-12 -4.8714E-13  1.9648E-12  5.9239E-12  2.7684E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.226106   52.958647    0.940111   -0.014304   -0.371779  2457273.121609
# Heliocentric elements and errors
Epoch:              2457270.5000  =  2015/09/05
Mean Anomaly:          295.89245 +/-     0.044
Argument of Peri:       71.65407 +/-     0.022
Long of Asc Node:       67.02751 +/-     0.001
Inclination:             8.27038 +/-     0.001
Eccentricity:         0.20455691 +/-    0.0007
Semi-Major Axis:     43.71213472 +/-    0.0127
Time of Perihelion: 2476068.3472 +/-      10.0
Perihelion:          34.77051572 +/-    0.0323
Aphelion:            52.65375372 +/-    0.0343
Period (y)              289.0089 +/-      0.13
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           25.70098541 +/-    0.0005
Ecliptic Y           32.49970455 +/-    0.0007
Ecliptic Z           -1.59578310 +/-    0.0000
Ecliptic XDOT        -0.00241330 +/-    0.0000
Ecliptic YDOT         0.00123489 +/-    0.0000
Ecliptic ZDOT         0.00039302 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.46465930 +/-    0.0006
Geocenter to KBO     41.08495248 +/-    0.0008
# Hcoef:  8.08

The following table shows the complete astrometric record for 15VT166. 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 (15VT166) followed by the observatory code and reference code for the source of the astrometry.

2015 09  07.62082  03 24 35.204  +16 21 26.75  24.3w 15VT166   568  C~2lVg      
2015 09  12.48448  03 24 27.950  +16 20 53.94  24.3w 15VT166   568  C~2lVg      
2015 10  07.52687  03 23 18.701  +16 16 18.23  24.1w 15VT166   568  C~2lVg      
2015 10  07.58621  03 23 18.474  +16 16 17.26  24.4w 15VT166   568  C~2lVg      
2015 10  09.56611  03 23 10.984  +16 15 49.03  24.4w 15VT166   568  C~2lVg      
2015 11  06.33883  03 21 05.244  +16 08 13.49  24.0r 15VT166   568  C~2lVg      
2015 11  06.40946  03 21 04.883  +16 08 12.30  23.8r 15VT166   568  C~2lVg      
2015 11  06.47899  03 21 04.525  +16 08 10.99  24.2r 15VT166   568  C~2lVg      
2015 11  17.47779  03 20 08.936  +16 05 00.01  24.1w 15VT166   568  C~2lVg      
2015 11  17.56554  03 20 08.499  +16 04 58.36  24.8w 15VT166   568  C~2lVg      
2015 12  06.48092  03 18 35.585  +15 59 55.24  24.3w 15VT166   568  C~2lVg      
2015 12  31.36453  03 16 56.790  +15 55 12.16  24.6w 15VT166   568  C~2lVg      
2016 01  07.39390  03 16 36.714  +15 54 27.15  24.3w 15VT166   568  C~2lVg      
2016 02  05.29346  03 16 01.819  +15 54 38.50  24.5w 15VT166   568  C~2lVg      
2016 02  11.24684  03 16 04.897  +15 55 21.99  24.5w 15VT166   568  C~2lVg      
2016 09  07.57941  03 29 53.997  +16 52 43.31        15VT166   568  C~2lVg      
2016 09  29.49059  03 29 05.734  +16 49 34.76  24.1w 15VT166   568  C~2lVg      
2016 10  05.49370  03 28 45.617  +16 48 20.57  24.3w 15VT166   568  C~2lVg      
2016 10  07.49825  03 28 38.325  +16 47 54.24  24.4w 15VT166   568  C~2lVg      
2016 10  07.59395  03 28 37.946  +16 47 52.98  24.4w 15VT166   568  C~2lVg      
2016 10  09.49835  03 28 30.753  +16 47 27.09  24.5w 15VT166   568  C~2lVg      
2016 10  09.57103  03 28 30.487  +16 47 26.02  24.2w 15VT166   568  C~2lVg      
2016 11  02.48525  03 26 43.495  +16 41 12.59  24.3w 15VT166   568  C~2lVg      
2016 11  04.46126  03 26 33.672  +16 40 39.28  24.3w 15VT166   568  C~2lVg      
2016 12  28.46047  03 22 22.219  +16 27 43.02  24.2w 15VT166   568  C~2lVg      
2016 12  29.39076  03 22 19.060  +16 27 35.09  24.3w 15VT166   568  C~2lVg      
2017 01  27.30287  03 21 18.038  +16 26 00.07  24.4w 15VT166   568  C~2lVg      
2017 09  16.62789  03 35 04.756  +17 22 56.97  24.5w 15VT166   568  C~2lVg      
2017 09  23.56691  03 34 49.257  +17 22 00.27  24.5w 15VT166   568  C~2lVg      
2017 12  13.38599  03 28 47.773  +17 02 33.60  24.2w 15VT166   568  C~2lVg      
2017 12  13.39528  03 28 47.710  +17 02 33.32  24.2w 15VT166   568  C~2lVg      
2017 12  13.42326  03 28 47.589  +17 02 33.22  24.2w 15VT166   568  C~2lVg      
2017 12  13.43255  03 28 47.549  +17 02 33.11  24.1w 15VT166   568  C~2lVg      

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     0.04       0.00     0.06
  2   0.0133   -109.29    -0.01      -5.69    -0.02
  3   0.0819  -1143.52     0.02     -22.82     0.07
  4   0.0820  -1146.93    -0.04     -22.94    -0.05
  5   0.0875  -1258.42    -0.07     -23.16     0.04
  6   0.1635  -3126.18    -0.06      -6.36    -0.03
  7   0.1637  -3131.51    -0.08      -6.19     0.01
  8   0.1639  -3136.84    -0.16      -6.15    -0.06
  9   0.1940  -3960.40     0.01      12.97     0.08
 10   0.1942  -3966.91     0.17      12.98    -0.09
 11   0.2460  -5340.03     0.01      62.70     0.20
 12   0.3142  -6790.92    -0.02     156.45    -0.07
 13   0.3334  -7082.63     0.02     187.97     0.06
 14   0.4125  -7566.45     0.04     329.62    -0.11
 15   0.4288  -7512.20     0.08     360.10     0.05
 16   1.0019   4904.28     0.08     689.13    -0.05
 17   1.0619   4186.01     0.03     675.15    -0.03
 18   1.0784   3887.67     0.05     673.82    -0.27
 19   1.0839   3779.67     0.16     673.92    -0.12
 20   1.0841   3774.08    -0.05     674.03    -0.04
 21   1.0893   3667.56    -0.13     674.22     0.06
 22   1.0895   3663.59     0.13     674.12    -0.07
 23   1.1550   2081.75    -0.05     690.33     0.06
 24   1.1604   1936.74    -0.01     692.95     0.05
 25   1.3083  -1757.83    -0.04     844.63     0.05
 26   1.3108  -1803.81    -0.09     848.43     0.05
 27   1.3900  -2677.28     0.05     978.67     0.03
 28   2.0260   9670.27     0.00    1381.16     0.08
 29   2.0450   9440.78    -0.03    1378.62     0.08
 30   2.2663   4126.50     0.14    1493.55    -0.06
 31   2.2663   4125.56    -0.18    1493.50    -0.15
 32   2.2664   4123.85    -0.01    1493.82     0.08
 33   2.2664   4123.27     0.02    1493.86     0.09

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.

15VT166    quality flag:3

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

axisobj        44.069    44.099    44.039
ecceobj         0.201     0.203     0.199
incobj          8.247     8.247     8.247
qmin           33.742    33.692    33.584
qmax           54.189    54.346    54.302
amean          43.727    43.727    43.727
amin           43.341    43.316    43.339
amax           44.172    44.213    44.183
emean           0.199     0.187     0.199
emin            0.158     0.147     0.156
emax            0.227     0.229     0.230
imean           7.581     8.320     7.489
imin            5.766     5.774     5.424
imax            9.100    10.200     9.079
excite_mean     0.240     0.239     0.239
fracstop        1.000     1.000     1.000
cjmean          3.029     3.030     3.030

libcent 0       181.2     179.5     181.3
libamp  0        29.7      55.5      29.3
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       176.8     202.0     174.0
kozaiamp        180.0     180.0     180.0