Orbit Fit and Astrometric record for 15VN170

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: 15VN170   
# Created Fri Dec  3 02:13:41 2021
# Orbit generated from Bernstein formalism
# Fitting     32 observations of     32
# Arc:   2.27y
# First observation: 2015/09/07
#  Last observation: 2017/12/13
Preliminary a, adot, b, bdot, g, gdot:
  -0.000121   0.026851   0.000001  -0.007811   0.026393   0.000000
# Chi-squared of fit:     3.03 DOF:     58 RMS:  0.05
# Min/Max residuals:    -0.21    0.18
# Exact a, adot, b, bdot, g, gdot:
  1.632228E-05  2.653474E-02 -4.757608E-06 -7.721389E-03  2.629052E-02 -1.297223E-03
# Covariance matrix:
  1.8998E-13 -6.1063E-14  5.0339E-15 -1.3492E-14  1.1879E-13  8.8096E-13
 -6.1063E-14  3.6419E-13  3.0456E-14 -1.1880E-13  1.5204E-13  7.7150E-12
  5.0339E-15  3.0456E-14  1.0688E-13 -9.4676E-14  2.1696E-14  9.3653E-13
 -1.3492E-14 -1.1880E-13 -9.4676E-14  1.6665E-13 -7.6909E-14 -3.6317E-12
  1.1879E-13  1.5204E-13  2.1696E-14 -7.6909E-14  2.2596E-13  5.0006E-12
  8.8096E-13  7.7150E-12  9.3653E-13 -3.6317E-12  5.0006E-12  2.3587E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.306983   52.530028    0.937273   -0.015113   -0.378839  2457273.125689
# Heliocentric elements and errors
Epoch:              2457270.5000  =  2015/09/05
Mean Anomaly:          320.69918 +/-     0.171
Argument of Peri:      235.82698 +/-     0.232
Long of Asc Node:      223.38508 +/-     0.000
Inclination:            16.47486 +/-     0.001
Eccentricity:         0.10513616 +/-    0.0004
Semi-Major Axis:     41.60013791 +/-    0.0041
Time of Perihelion: 2467969.4140 +/-      46.5
Perihelion:          37.22645927 +/-    0.0179
Aphelion:            45.97381655 +/-    0.0181
Period (y)              268.3183 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           24.09106055 +/-    0.0004
Ecliptic Y           29.89453256 +/-    0.0005
Ecliptic Z           -1.53127880 +/-    0.0000
Ecliptic XDOT        -0.00229681 +/-    0.0000
Ecliptic YDOT         0.00154179 +/-    0.0000
Ecliptic ZDOT        -0.00079795 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.42404313 +/-    0.0005
Geocenter to KBO     38.03652454 +/-    0.0007
# Hcoef:  7.89

The following table shows the complete astrometric record for 15VN170. 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 (15VN170) followed by the observatory code and reference code for the source of the astrometry.

2015 09  07.62490  03 22 56.626  +16 10 18.15  23.9w 15VN170   568  C~2nw6      
2015 09  12.48855  03 22 49.315  +16 09 11.67  23.7w 15VN170   568  C~2nw6      
2015 10  07.53269  03 21 37.412  +16 01 31.99  23.5w 15VN170   568  C~2nw6      
2015 10  07.59208  03 21 37.168  +16 01 30.70  24.1w 15VN170   568  C~2nw6      
2015 10  09.57195  03 21 29.334  +16 00 47.24  23.8w 15VN170   568  C~2nw6      
2015 11  06.34408  03 19 17.365  +15 49 35.89  23.7r 15VN170   568  C~2nw6      
2015 11  06.41470  03 19 16.981  +15 49 34.05  23.5r 15VN170   568  C~2nw6      
2015 11  06.48426  03 19 16.602  +15 49 32.32  23.7r 15VN170   568  C~2nw6      
2015 11  07.50182  03 19 11.250  +15 49 06.55  23.9w 15VN170   568  C~2nw6      
2015 11  17.48361  03 18 18.292  +15 44 56.10  23.9w 15VN170   568  C~2nw6      
2015 11  17.57138  03 18 17.805  +15 44 53.73  23.6w 15VN170   568  C~2nw6      
2015 12  06.34926  03 16 41.460  +15 37 32.49  23.7w 15VN170   568  C~2nw6      
2015 12  06.48675  03 16 40.788  +15 37 29.51  24.0w 15VN170   568  C~2nw6      
2015 12  31.37031  03 14 58.962  +15 29 58.48  24.0w 15VN170   568  C~2nw6      
2016 01  07.39971  03 14 38.726  +15 28 30.37  24.0w 15VN170   568  C~2nw6      
2016 02  05.29926  03 14 07.030  +15 26 07.73  23.6w 15VN170   568  C~2nw6      
2016 02  11.25262  03 14 11.548  +15 26 23.58  24.4w 15VN170   568  C~2nw6      
2016 09  07.58521  03 29 31.351  +16 07 01.75  24.3w 15VN170   568  C~2nw6      
2016 09  27.51883  03 28 48.653  +16 01 38.86  24.3w 15VN170   568  C~2nw6      
2016 09  29.49637  03 28 42.459  +16 01 00.45  23.7w 15VN170   568  C~2nw6      
2016 10  05.49953  03 28 21.671  +15 58 58.13  24.1w 15VN170   568  C~2nw6      
2016 10  07.50403  03 28 14.114  +15 58 15.35  24.2w 15VN170   568  C~2nw6      
2016 10  07.59973  03 28 13.729  +15 58 13.28  23.9w 15VN170   568  C~2nw6      
2016 10  09.50422  03 28 06.282  +15 57 31.98  24.0w 15VN170   568  C~2nw6      
2016 10  09.57681  03 28 05.990  +15 57 30.37  24.2w 15VN170   568  C~2nw6      
2016 11  02.49102  03 26 14.528  +15 48 05.16  23.8w 15VN170   568  C~2nw6      
2016 11  04.46713  03 26 04.270  +15 47 16.37  24.0w 15VN170   568  C~2nw6      
2016 12  28.45409  03 21 42.980  +15 28 09.09  24.2w 15VN170   568  C~2nw6      
2017 01  27.30860  03 20 39.121  +15 23 58.33  23.9w 15VN170   568  C~2nw6      
2017 09  16.59057  03 35 54.895  +16 01 01.89  23.9w 15VN170   568  C~2nw6      
2017 09  23.53642  03 35 39.434  +15 59 05.20        15VN170   568  C~2nw6      
2017 12  13.36708  03 29 25.581  +15 29 14.56  24.2w 15VN170   568  C~2nw6      

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    -0.07       0.00     0.02
     2   0.0133   -118.69    -0.06     -37.79    -0.03
     3   0.0819  -1237.55     0.08    -220.56     0.02
     4   0.0820  -1241.28    -0.02    -220.92     0.05
     5   0.0875  -1361.56     0.03    -234.32     0.01
     6   0.1635  -3373.70     0.18    -398.22     0.02
     7   0.1637  -3379.53     0.06    -398.58    -0.02
     8   0.1639  -3385.27    -0.04    -398.85     0.03
     9   0.1667  -3466.55    -0.07    -403.96    -0.03
    10   0.1940  -4269.94     0.04    -449.71     0.02
    11   0.1942  -4277.35    -0.21    -450.19    -0.09
    12   0.2457  -5736.32    -0.05    -517.19    -0.02
    13   0.2460  -5746.47     0.03    -517.55    -0.01
    14   0.3142  -7286.09     0.06    -570.35    -0.01
    15   0.3334  -7591.87     0.00    -578.98     0.06
    16   0.4125  -8072.17     0.00    -596.71     0.07
    17   0.4288  -8004.87     0.02    -598.53     0.03
    18   1.0019   5462.22    -0.06   -1601.64    -0.01
    19   1.0565   4786.07    -0.04   -1764.14     0.03
    20   1.0619   4690.02     0.06   -1779.48    -0.05
    21   1.0784   4369.27     0.04   -1824.49     0.01
    22   1.0839   4253.07     0.04   -1839.17    -0.07
    23   1.0841   4247.18    -0.07   -1839.82    -0.05
    24   1.0893   4132.87     0.03   -1853.44     0.00
    25   1.0895   4128.39     0.09   -1853.96    -0.03
    26   1.1550   2429.98    -0.02   -2004.32     0.00
    27   1.1604   2274.42    -0.00   -2014.82     0.01
    28   1.3082  -1667.46    -0.04   -2178.58    -0.00
    29   1.3900  -2624.37     0.03   -2186.67     0.05
    30   2.0259  10751.10     0.03   -3283.26    -0.01
    31   2.0449  10506.22     0.00   -3343.81    -0.03
    32   2.2662   4827.37    -0.06   -3780.72     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.

15VN170    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        41.974    41.983    41.965
ecceobj         0.108     0.108     0.107
incobj         16.404    16.404    16.404
qmin           36.339    36.362    36.189
qmax           47.235    47.315    47.297
amean          41.656    41.667    41.610
amin           41.315    41.327    41.252
amax           42.019    42.030    42.001
emean           0.107     0.107     0.107
emin            0.091     0.092     0.091
emax            0.124     0.126     0.128
imean          17.728    17.725    17.688
imin           17.075    17.018    16.969
imax           18.433    18.440    18.451
excite_mean     0.323     0.323     0.322
fracstop        1.000     1.000     1.000
cjmean          2.951     2.951     2.951

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       182.9     185.4     180.7
kozaiamp        180.0     180.0     179.9