Orbit Fit and Astrometric record for 15VO173

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: 15VO173   
# Created Tue Feb 19 02:10:43 2019
# Orbit generated from Bernstein formalism
# Fitting   29 observations of   29
# Arc:   2.35y
# First observation: 2015/08/11
#  Last observation: 2017/12/16
Preliminary a, adot, b, bdot, g, gdot:
  -0.000130   0.024817  -0.000004   0.009449   0.025338   0.000000
# Chi-squared of fit:    13.83 DOF:   52 RMS:  0.12
# Min/Max residuals:    -0.30    0.29
# Exact a, adot, b, bdot, g, gdot:
  1.586655E-05  2.444990E-02  5.372269E-06  9.314017E-03  2.510211E-02  3.363391E-03
# Covariance matrix:
  2.0359E-13 -3.1266E-14 -2.9270E-15  2.3664E-14  1.2682E-13  1.2267E-12
 -3.1266E-14  4.1139E-13 -5.4308E-14  2.1120E-13  2.2195E-13  1.0742E-11
 -2.9270E-15 -5.4308E-14  1.1667E-13 -1.1646E-13 -3.3902E-14 -1.9393E-12
  2.3664E-14  2.1120E-13 -1.1646E-13  2.5360E-13  1.4452E-13  7.4825E-12
  1.2682E-13  2.2195E-13 -3.3902E-14  1.4452E-13  2.5713E-13  7.3745E-12
  1.2267E-12  1.0742E-11 -1.9393E-12  7.4825E-12  7.3745E-12  3.8047E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.687064   50.292552    1.015415    0.001582    0.031083  2457246.085349
# Heliocentric elements and errors
Epoch:              2457240.5000  =  2015/08/06
Mean Anomaly:           36.44505 +/-     0.121
Argument of Peri:      304.01076 +/-     0.194
Long of Asc Node:       55.89442 +/-     0.000
Inclination:            20.90564 +/-     0.001
Eccentricity:         0.15051802 +/-    0.0006
Semi-Major Axis:     44.80771263 +/-    0.0104
Time of Perihelion: 2446149.6813 +/-      36.6
Perihelion:          38.06334463 +/-    0.0301
Aphelion:            51.55208063 +/-    0.0311
Period (y)              299.9421 +/-      0.10
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           26.18007040 +/-    0.0005
Ecliptic Y           29.94107982 +/-    0.0006
Ecliptic Z           -1.86736311 +/-    0.0000
Ecliptic XDOT        -0.00178908 +/-    0.0000
Ecliptic YDOT         0.00201587 +/-    0.0000
Ecliptic ZDOT         0.00099761 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.81647136 +/-    0.0006
Geocenter to KBO     39.83729099 +/-    0.0008
# Hcoef:  9.08

The following table shows the complete astrometric record for 15VO173. 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 (15VO173) followed by the observatory code and reference code for the source of the astrometry.

2015 08  11.58456  03 14 22.583  +15 13 42.28  25.2w 15VO173   568  C~2nwI      
2015 09  06.63168  03 14 16.006  +15 13 50.34  24.6w 15VO173   568  C~2nwI      
2015 09  12.52133  03 14 05.392  +15 13 18.01  25.0w 15VO173   568  C~2nwI      
2015 10  07.45992  03 12 47.529  +15 09 07.06  25.2w 15VO173   568  C~2nwI      
2015 10  08.46335  03 12 43.408  +15 08 54.00  25.2w 15VO173   568  C~2nwI      
2015 10  08.52236  03 12 43.186  +15 08 52.90  25.1w 15VO173   568  C~2nwI      
2015 11  07.36952  03 10 19.119  +15 01 19.02  25.1r 15VO173   568  C~2nwI      
2015 11  07.41164  03 10 18.907  +15 01 18.38  24.9r 15VO173   568  C~2nwI      
2015 11  07.45387  03 10 18.668  +15 01 17.77  24.8r 15VO173   568  C~2nwI      
2015 11  17.38710  03 09 26.190  +14 58 41.36  25.0w 15VO173   568  C~2nwI      
2015 11  17.43381  03 09 25.943  +14 58 40.61  25.4w 15VO173   568  C~2nwI      
2015 12  06.39016  03 07 50.065  +14 54 17.87  25.0w 15VO173   568  C~2nwI      
2015 12  13.33048  03 07 18.422  +14 53 01.25  25.0w 15VO173   568  C~2nwI      
2016 01  01.37764  03 06 07.527  +14 50 49.05  25.0w 15VO173   568  C~2nwI      
2016 01  07.32440  03 05 51.302  +14 50 34.75  25.6w 15VO173   568  C~2nwI      
2016 02  04.32117  03 05 20.782  +14 52 49.64  25.4w 15VO173   568  C~2nwI      
2016 02  05.26985  03 05 21.133  +14 52 59.92  24.2w 15VO173   568  C~2nwI      
2016 02  10.29068  03 05 24.660  +14 54 01.94  25.5w 15VO173   568  C~2nwI      
2016 09  06.59240  03 19 19.288  +16 06 58.39        15VO173   568  C~2nwI      
2016 09  26.58845  03 18 31.467  +16 04 47.45  26.2w 15VO173   568  C~2nwI      
2016 10  10.39070  03 17 39.549  +16 02 13.02  25.5w 15VO173   568  C~2nwI      
2016 10  10.44903  03 17 39.299  +16 02 12.25  25.5w 15VO173   568  C~2nwI      
2016 10  27.49679  03 16 19.596  +15 58 13.29  25.1w 15VO173   568  C~2nwI      
2016 11  03.52184  03 15 43.500  +15 56 26.31  25.3w 15VO173   568  C~2nwI      
2016 12  24.30148  03 11 36.860  +15 45 41.88  25.1w 15VO173   568  C~2nwI      
2017 01  02.40371  03 11 06.509  +15 44 52.86  24.8w 15VO173   568  C~2nwI      
2017 09  23.54857  03 23 48.387  +16 58 02.34  25.3w 15VO173   568  C~2nwI      
2017 12  16.38715  03 17 16.144  +16 40 26.84  25.1w 15VO173   568  C~2nwI      
2017 12  16.39181  03 17 16.139  +16 40 26.65  25.4w 15VO173   568  C~2nwI      

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    -0.10       0.00     0.10
  2   0.0713    -89.70    -0.03      32.85     0.11
  3   0.0874   -246.41    -0.20      42.16     0.03
  4   0.1557  -1399.83     0.11      98.17    -0.17
  5   0.1585  -1460.83    -0.04     101.40     0.10
  6   0.1586  -1464.22     0.25     101.19    -0.30
  7   0.2403  -3596.60    -0.06     219.85     0.07
  8   0.2405  -3599.73     0.13     220.05     0.05
  9   0.2406  -3603.23    -0.03     220.39     0.16
 10   0.2678  -4377.95    -0.07     273.75    -0.00
 11   0.2679  -4381.60    -0.03     273.99    -0.05
 12   0.3198  -5791.39    -0.23     395.75     0.03
 13   0.3388  -6254.09    -0.08     446.25     0.05
 14   0.3909  -7280.29    -0.09     598.45     0.10
 15   0.4072  -7510.84    -0.07     648.85    -0.30
 16   0.4839  -7900.26     0.29     899.60     0.01
 17   0.4865  -7892.55    -0.05     908.11    -0.10
 18   0.5002  -7826.33     0.28     953.83     0.08
 19   1.0733   4970.99     0.07    1969.48     0.00
 20   1.1280   4270.99     0.12    2020.87    -0.03
 21   1.1658   3507.85     0.01    2065.60     0.06
 22   1.1660   3504.16     0.01    2065.79     0.02
 23   1.2126   2332.08     0.02    2134.28     0.01
 24   1.2319   1801.56     0.09    2167.13    -0.06
 25   1.3709  -1801.49     0.04    2485.80    -0.04
 26   1.3958  -2236.93    -0.22    2555.49     0.08
 27   2.1190   9500.65    -0.03    3947.95    -0.14
 28   2.3485   3779.01    -0.12    4369.15     0.16
 29   2.3485   3778.89     0.06    4368.98    -0.04

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.

15VO173    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        45.305    45.342    45.269
ecceobj         0.160     0.162     0.158
incobj         20.841    20.841    20.841
qmin           37.367    37.273    37.379
qmax           52.847    52.962    52.732
amean          44.926    44.958    44.888
amin           44.559    44.590    44.517
amax           45.338    45.380    45.315
emean           0.152     0.153     0.150
emin            0.138     0.139     0.136
emax            0.166     0.168     0.165
imean          19.756    19.760    19.754
imin           19.301    19.303    19.309
imax           20.220    20.222    20.206
excite_mean     0.370     0.371     0.370
fracstop        1.000     1.000     1.000
cjmean          2.942     2.942     2.943

libcent 0      -180.0    -180.0    -180.0
libamp  0      -180.0    -180.0    -180.0
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       174.9     174.4     174.6
kozaiamp        180.0     179.9     180.0