Orbit Fit and Astrometric record for 15VZ172

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: 15VZ172   
# Created Tue Apr  1 01:10:42 2025
# Orbit generated from Bernstein formalism
# Fitting     32 observations of     32
# Arc:   3.08y
# First observation: 2014/11/17
#  Last observation: 2017/12/16
Preliminary a, adot, b, bdot, g, gdot:
   0.000026   0.021088   0.000000   0.000661   0.022846   0.000000
# Chi-squared of fit:    14.66 DOF:     58 RMS:  0.12
# Min/Max residuals:    -0.31    0.32
# Exact a, adot, b, bdot, g, gdot:
  1.472771E-05  2.120959E-02  4.700786E-07  6.658083E-04  2.294350E-02  4.201691E-05
# Covariance matrix:
  3.8820E-13 -4.2290E-13  5.6670E-15 -9.8074E-15 -2.1050E-13 -4.7780E-12
 -4.2290E-13  6.0757E-13 -9.4890E-15  1.6604E-14  3.2231E-13  8.0580E-12
  5.6670E-15 -9.4890E-15  1.9735E-13 -1.0646E-13 -5.9225E-15 -1.4339E-13
 -9.8074E-15  1.6604E-14 -1.0646E-13  7.5246E-14  9.6167E-15  2.5137E-13
 -2.1050E-13  3.2231E-13 -5.9225E-15  9.6167E-15  3.2466E-13  4.7937E-12
 -4.7780E-12  8.0580E-12 -1.4339E-13  2.5137E-13  4.7937E-12  1.2191E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.312775   48.435789   -0.105747   -0.022383   -0.983540  2456978.885908
# Heliocentric elements and errors
Epoch:              2456970.5000  =  2014/11/09
Mean Anomaly:          176.77533 +/-     0.836
Argument of Peri:      147.48053 +/-     0.836
Long of Asc Node:       84.06015 +/-     0.011
Inclination:             2.21095 +/-     0.001
Eccentricity:         0.03440030 +/-    0.0001
Semi-Major Axis:     43.08797452 +/-    0.0028
Time of Perihelion: 2509549.7037 +/-     239.7
Perihelion:          41.60573547 +/-    0.0035
Aphelion:            44.57021357 +/-    0.0037
Period (y)              282.8410 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           29.47994219 +/-    0.0007
Ecliptic Y           33.41029537 +/-    0.0008
Ecliptic Z           -0.99855358 +/-    0.0000
Ecliptic XDOT        -0.00189342 +/-    0.0000
Ecliptic YDOT         0.00167932 +/-    0.0000
Ecliptic ZDOT         0.00007942 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   44.56805961 +/-    0.0008
Geocenter to KBO     43.58533539 +/-    0.0011
# Hcoef:  8.81

The following table shows the complete astrometric record for 15VZ172. 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 (15VZ172) followed by the observatory code and reference code for the source of the astrometry.

2014 11  17.38513  03 05 25.017  +16 03 10.29  25.1r 15VZ172   568  C~2nwF      
2014 11  17.49897  03 05 24.501  +16 03 08.19  25.3r 15VZ172   568  C~2nwF      
2014 11  19.28749  03 05 16.156  +16 02 34.76  25.5r 15VZ172   568  C~2nwF      
2015 09  06.62350  03 14 33.082  +16 42 49.71  24.7w 15VZ172   568  C~2nwF      
2015 09  12.51312  03 14 23.791  +16 42 06.25  25.3w 15VZ172   568  C~2nwF      
2015 10  07.44703  03 13 14.927  +16 37 11.21  25.2w 15VZ172   568  C~2nwF      
2015 10  08.45165  03 13 11.285  +16 36 56.12  25.6w 15VZ172   568  C~2nwF      
2015 10  08.51072  03 13 11.074  +16 36 55.39  25.9w 15VZ172   568  C~2nwF      
2015 11  07.35903  03 11 02.937  +16 28 19.87  25.1r 15VZ172   568  C~2nwF      
2015 11  07.40112  03 11 02.723  +16 28 19.33  24.9r 15VZ172   568  C~2nwF      
2015 11  07.44330  03 11 02.529  +16 28 18.29  25.0r 15VZ172   568  C~2nwF      
2015 11  10.52886  03 10 48.025  +16 27 21.26  25.5w 15VZ172   568  C~2nwF      
2015 11  17.37547  03 10 15.778  +16 25 15.30  25.5w 15VZ172   568  C~2nwF      
2015 11  17.42215  03 10 15.548  +16 25 14.42  25.1w 15VZ172   568  C~2nwF      
2015 12  13.31874  03 08 21.757  +16 18 01.41  25.5w 15VZ172   568  C~2nwF      
2016 01  01.37186  03 07 18.343  +16 14 15.24  25.8w 15VZ172   568  C~2nwF      
2016 01  07.31862  03 07 03.812  +16 13 27.46  25.5w 15VZ172   568  C~2nwF      
2016 02  10.28486  03 06 40.079  +16 13 02.79  25.4w 15VZ172   568  C~2nwF      
2016 09  06.60560  03 19 19.398  +17 03 39.46        15VZ172   568  C~2nwF      
2016 10  10.40230  03 17 51.053  +16 57 29.51  25.6w 15VZ172   568  C~2nwF      
2016 10  10.46065  03 17 50.824  +16 57 28.60  25.6w 15VZ172   568  C~2nwF      
2016 10  27.49100  03 16 39.973  +16 52 49.71  25.4w 15VZ172   568  C~2nwF      
2016 10  27.49679  03 16 39.949  +16 52 49.32  25.4w 15VZ172   568  C~2nwF      
2016 11  03.51606  03 16 07.826  +16 50 45.17  25.6w 15VZ172   568  C~2nwF      
2016 11  03.52184  03 16 07.792  +16 50 45.02  25.5w 15VZ172   568  C~2nwF      
2016 12  24.29598  03 12 27.847  +16 37 09.31  25.4w 15VZ172   568  C~2nwF      
2017 01  02.39822  03 12 00.740  +16 35 37.48  25.6w 15VZ172   568  C~2nwF      
2017 01  26.28489  03 11 21.666  +16 33 49.37  26.5w 15VZ172   568  C~2nwF      
2017 01  26.32220  03 11 21.628  +16 33 49.48  26.4w 15VZ172   568  C~2nwF      
2017 09  17.60038  03 23 49.591  +17 22 49.28  25.5w 15VZ172   568  C~2nwF      
2017 09  23.58734  03 23 35.616  +17 21 51.41  25.4w 15VZ172   568  C~2nwF      
2017 12  16.39181  03 17 46.303  +17 00 04.74  25.0w 15VZ172   568  C~2nwF      

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    -0.02       0.00    -0.00
     2   0.0003     -7.73     0.32       0.02    -0.08
     3   0.0052   -132.58    -0.31       0.93    -0.26
     4   0.8028   8240.85     0.09     168.07    -0.08
     5   0.8190   8100.41    -0.09     161.37     0.16
     6   0.8872   7066.62    -0.06     138.73     0.03
     7   0.8900   7012.08     0.02     138.08    -0.01
     8   0.8901   7008.96     0.20     138.18     0.10
     9   0.9719   5094.06    -0.04     132.74     0.02
    10   0.9720   5090.94    -0.16     133.04     0.29
    11   0.9721   5087.98    -0.13     132.79     0.01
    12   0.9805   4871.56     0.04     133.79    -0.02
    13   0.9993   4390.60     0.03     137.07    -0.02
    14   0.9994   4387.17    -0.07     137.11    -0.02
    15   1.0703   2692.83     0.16     162.47    -0.23
    16   1.1225   1752.50     0.12     192.99     0.06
    17   1.1388   1538.11     0.07     204.05     0.18
    18   1.2318   1202.51    -0.12     273.61     0.14
    19   1.8048  12545.16    -0.01     302.75    -0.08
    20   1.8974  11221.00     0.08     273.33    -0.05
    21   1.8975  11217.58    -0.01     273.30    -0.07
    22   1.9442  10160.43    -0.02     268.86     0.10
    23   1.9442  10160.00    -0.06     268.57    -0.18
    24   1.9634   9681.35     0.03     269.33     0.02
    25   1.9634   9680.83    -0.07     269.31     0.00
    26   2.1024   6413.07     0.21     316.87     0.16
    27   2.1273   6012.68    -0.13     332.22     0.08
    28   2.1927   5442.03     0.04     378.16    -0.18
    29   2.1928   5441.53    -0.12     378.41    -0.01
    30   2.8343  16601.90    -0.06     427.38     0.03
    31   2.8507  16392.37     0.08     421.86    -0.06
    32   3.0801  11195.45     0.00     441.18    -0.05

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.

15VZ172    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.398    43.406    43.389
ecceobj         0.028     0.028     0.028
incobj          2.210     2.210     2.210
qmin           40.987    41.064    40.985
qmax           45.348    45.353    45.337
amean          43.094    43.102    43.086
amin           42.764    42.776    42.763
amax           43.432    43.452    43.409
emean           0.026     0.025     0.026
emin            0.007     0.006     0.007
emax            0.044     0.044     0.045
imean           0.868     0.866     0.871
imin            0.552     0.548     0.556
imax            1.167     1.164     1.168
excite_mean     0.030     0.030     0.030
fracstop        1.000     1.000     1.000
cjmean          3.090     3.090     3.090

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       180.2     180.3     180.5
kozaiamp        179.9     180.0     179.9