Orbit Fit and Astrometric record for 15VN173

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: 15VN173   
# Created Tue Apr  1 01:10:43 2025
# Orbit generated from Bernstein formalism
# Fitting     32 observations of     32
# Arc:   2.19y
# First observation: 2014/11/17
#  Last observation: 2017/01/26
Preliminary a, adot, b, bdot, g, gdot:
  -0.000036   0.020654  -0.000001   0.001621   0.022621   0.000000
# Chi-squared of fit:     9.19 DOF:     58 RMS:  0.09
# Min/Max residuals:    -0.32    0.17
# Exact a, adot, b, bdot, g, gdot:
  1.358722E-05  2.074504E-02  1.730385E-06  1.632540E-03  2.276760E-02 -1.316378E-04
# Covariance matrix:
  2.6918E-13 -3.5619E-13  7.4763E-15 -1.9672E-14 -1.7110E-13 -5.2528E-12
 -3.5619E-13  7.6747E-13 -2.0750E-14  5.5439E-14  4.4177E-13  1.4747E-11
  7.4763E-15 -2.0750E-14  1.8284E-13 -1.1939E-13 -1.4107E-14 -4.5897E-13
 -1.9672E-14  5.5439E-14 -1.1939E-13  1.0662E-13  3.5109E-14  1.2329E-12
 -1.7110E-13  4.4177E-13 -1.4107E-14  3.5109E-14  4.0196E-13  9.5088E-12
 -5.2528E-12  1.4747E-11 -4.5897E-13  1.2329E-12  9.5088E-12  3.2753E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.821709   47.530931   -0.119286   -0.048209   -0.981075  2456978.772168
# Heliocentric elements and errors
Epoch:              2456970.5000  =  2014/11/09
Mean Anomaly:          187.32164 +/-     0.934
Argument of Peri:      141.79196 +/-     0.934
Long of Asc Node:       79.13022 +/-     0.005
Inclination:             5.28001 +/-     0.001
Eccentricity:         0.05029448 +/-    0.0001
Semi-Major Axis:     42.76739432 +/-    0.0029
Time of Perihelion: 2505971.2832 +/-     264.9
Perihelion:          40.61643043 +/-    0.0055
Aphelion:            44.91835821 +/-    0.0057
Period (y)              279.6903 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           30.19199942 +/-    0.0008
Ecliptic Y           33.16605617 +/-    0.0009
Ecliptic Z           -2.16214141 +/-    0.0001
Ecliptic XDOT        -0.00184857 +/-    0.0000
Ecliptic YDOT         0.00167486 +/-    0.0000
Ecliptic ZDOT         0.00019696 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   44.90232696 +/-    0.0009
Geocenter to KBO     43.92205769 +/-    0.0012
# Hcoef:  8.26

The following table shows the complete astrometric record for 15VN173. 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 (15VN173) followed by the observatory code and reference code for the source of the astrometry.

2014 11  17.27139  03 03 32.396  +14 21 10.82  24.2r 15VN173   568  C~2nwI      
2014 11  17.38009  03 03 31.867  +14 21 09.03  24.9r 15VN173   568  C~2nwI      
2014 11  17.49387  03 03 31.341  +14 21 07.02  24.8r 15VN173   568  C~2nwI      
2014 11  19.28114  03 03 23.147  +14 20 35.25  24.3r 15VN173   568  C~2nwI      
2014 11  23.38468  03 03 04.481  +14 19 24.59  24.6r 15VN173   568  C~2nwI      
2015 08  11.58456  03 12 32.744  +15 06 07.94  24.8w 15VN173   568  C~2nwI      
2015 09  06.63168  03 12 26.278  +15 04 30.13  24.8w 15VN173   568  C~2nwI      
2015 09  12.52133  03 12 16.753  +15 03 37.38  24.8w 15VN173   568  C~2nwI      
2015 10  08.46335  03 11 03.888  +14 57 56.49  24.7w 15VN173   568  C~2nwI      
2015 10  08.52236  03 11 03.671  +14 57 55.38  24.8w 15VN173   568  C~2nwI      
2015 11  07.36952  03 08 56.468  +14 49 11.56  24.7r 15VN173   568  C~2nwI      
2015 11  07.41164  03 08 56.273  +14 49 10.73  24.6r 15VN173   568  C~2nwI      
2015 11  07.45387  03 08 56.075  +14 49 09.96  24.9r 15VN173   568  C~2nwI      
2015 11  10.54061  03 08 41.705  +14 48 14.03  24.5w 15VN173   568  C~2nwI      
2015 12  06.39596  03 06 45.293  +14 41 04.34  24.8w 15VN173   568  C~2nwI      
2015 12  13.33048  03 06 17.512  +14 39 30.20  25.3w 15VN173   568  C~2nwI      
2015 12  13.38903  03 06 17.282  +14 39 29.45  25.1w 15VN173   568  C~2nwI      
2016 01  01.38342  03 05 15.330  +14 36 22.31  25.2w 15VN173   568  C~2nwI      
2016 01  02.34977  03 05 12.829  +14 36 15.61  24.3w 15VN173   568  C~2nwI      
2016 01  07.33018  03 05 01.165  +14 35 48.13  24.9w 15VN173   568  C~2nwI      
2016 02  05.27611  03 04 35.358  +14 36 15.52  24.9w 15VN173   568  C~2nwI      
2016 02  10.29646  03 04 38.628  +14 36 53.00  25.2w 15VN173   568  C~2nwI      
2016 09  06.61716  03 17 00.240  +15 28 23.18        15VN173   568  C~2nwI      
2016 09  26.60468  03 16 17.364  +15 24 53.28  25.7w 15VN173   568  C~2nwI      
2016 10  10.41386  03 15 31.189  +15 21 32.63  24.9w 15VN173   568  C~2nwI      
2016 10  10.47261  03 15 30.951  +15 21 31.71  24.9w 15VN173   568  C~2nwI      
2016 10  27.50838  03 14 20.454  +15 16 44.66  25.1w 15VN173   568  C~2nwI      
2016 11  03.53341  03 13 48.573  +15 14 39.91  25.1w 15VN173   568  C~2nwI      
2016 12  28.40571  03 09 59.173  +15 01 24.07  26.2w 15VN173   568  C~2nwI      
2016 12  29.36323  03 09 56.393  +15 01 16.33  25.2w 15VN173   568  C~2nwI      
2017 01  02.37026  03 09 45.446  +15 00 47.89        15VN173   568  C~2nwI      
2017 01  26.25843  03 09 07.523  +14 59 58.35  25.2w 15VN173   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     0.17       0.00    -0.12
     2   0.0003     -7.88    -0.08       0.41     0.08
     3   0.0006    -15.78     0.02       0.60     0.07
     4   0.0055   -139.00    -0.05       3.10    -0.13
     5   0.0167   -419.23     0.04      10.51     0.06
     6   0.7319   8281.58    -0.01     459.48     0.07
     7   0.8032   8164.98     0.15     390.24     0.01
     8   0.8193   8017.71    -0.08     376.35    -0.01
     9   0.8903   6907.81    -0.01     331.45     0.06
    10   0.8905   6904.48    -0.01     331.23    -0.11
    11   0.9722   4985.97     0.00     325.44     0.12
    12   0.9723   4983.02     0.04     325.41     0.04
    13   0.9724   4980.05     0.06     325.45     0.04
    14   0.9809   4764.18    -0.06     328.23     0.09
    15   1.0517   3021.70     0.05     375.53    -0.08
    16   1.0707   2608.13     0.04     395.48     0.04
    17   1.0708   2604.72     0.03     395.68     0.04
    18   1.1228   1688.67    -0.07     462.90     0.10
    19   1.1255   1651.92    -0.32     466.46    -0.18
    20   1.1391   1481.59     0.10     486.70    -0.27
    21   1.2184   1129.06    -0.01     616.38     0.10
    22   1.2321   1185.03    -0.09     639.30    -0.07
    23   1.8052  12377.95    -0.06     721.29     0.09
    24   1.8599  11722.41     0.05     681.73     0.01
    25   1.8977  11023.21     0.09     664.34    -0.05
    26   1.8979  11019.64    -0.10     664.36    -0.00
    27   1.9445   9957.40    -0.03     657.72     0.10
    28   1.9638   9478.42    -0.15     660.11     0.04
    29   2.1140   6060.10     0.13     784.51     0.02
    30   2.1166   6019.19     0.16     787.95    -0.13
    31   2.1276   5858.68    -0.01     803.47    -0.01
    32   2.1930   5315.97     0.03     904.66    -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.

15VN173    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.070    43.078    43.062
ecceobj         0.043     0.043     0.043
incobj          5.276     5.276     5.276
qmin           40.056    40.113    40.088
qmax           45.686    45.656    45.638
amean          42.775    42.783    42.768
amin           42.445    42.451    42.440
amax           43.123    43.122    43.104
emean           0.039     0.039     0.039
emin            0.019     0.019     0.018
emax            0.060     0.059     0.059
imean           3.142     3.148     3.138
imin            2.190     2.200     2.182
imax            4.241     4.243     4.242
excite_mean     0.068     0.068     0.068
fracstop        1.000     1.000     1.000
cjmean          3.082     3.082     3.082

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       183.4     183.0     183.8
kozaiamp        180.0     180.0     180.0