Orbit Fit and Astrometric record for 15VJ172

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: 15VJ172   
# Created Tue Apr  1 01:10:42 2025
# Orbit generated from Bernstein formalism
# Fitting     31 observations of     32
# Arc:   2.34y
# First observation: 2015/08/11
#  Last observation: 2017/12/13
Preliminary a, adot, b, bdot, g, gdot:
  -0.000092   0.024394  -0.000001   0.000618   0.024332   0.000000
# Chi-squared of fit:     8.76 DOF:     56 RMS:  0.09
# Min/Max residuals:    -0.21    0.37
# Exact a, adot, b, bdot, g, gdot:
  1.470806E-05  2.392453E-02  8.347272E-07  6.041877E-04  2.398357E-02 -9.014371E-04
# Covariance matrix:
  2.0133E-13  3.9797E-15 -8.7315E-16  3.1974E-15  1.4507E-13  2.5715E-12
  3.9797E-15  3.8423E-13 -4.3674E-15  1.5808E-14  2.6284E-13  1.2540E-11
 -8.7315E-16 -4.3674E-15  1.0792E-13 -8.2693E-14 -3.7043E-15 -2.0948E-13
  3.1974E-15  1.5808E-14 -8.2693E-14  1.1020E-13  1.3442E-14  7.5741E-13
  1.4507E-13  2.6284E-13 -3.7043E-15  1.3442E-14  3.1010E-13  1.0697E-11
  2.5715E-12  1.2540E-11 -2.0948E-13  7.5741E-13  1.0697E-11  6.0015E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.022255   50.533604    1.015271    0.000136    0.035606  2457246.073039
# Heliocentric elements and errors
Epoch:              2457240.5000  =  2015/08/06
Mean Anomaly:          312.05220 +/-     0.341
Argument of Peri:       54.50062 +/-     0.451
Long of Asc Node:       50.01741 +/-     0.000
Inclination:             1.45054 +/-     0.001
Eccentricity:         0.08180676 +/-    0.0009
Semi-Major Axis:     43.89991985 +/-    0.0060
Time of Perihelion: 2471390.6237 +/-     100.5
Perihelion:          40.30860950 +/-    0.0382
Aphelion:            47.49123019 +/-    0.0383
Period (y)              290.8733 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           27.25969521 +/-    0.0006
Ecliptic Y           31.51570089 +/-    0.0007
Ecliptic Z           -0.01612753 +/-    0.0000
Ecliptic XDOT        -0.00217586 +/-    0.0000
Ecliptic YDOT         0.00165019 +/-    0.0000
Ecliptic ZDOT         0.00006907 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.66930100 +/-    0.0007
Geocenter to KBO     41.69520425 +/-    0.0010
# Hcoef:  8.43

The following table shows the complete astrometric record for 15VJ172. 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 (15VJ172) followed by the observatory code and reference code for the source of the astrometry.

2015 08  11.57225  03 12 24.310  +17 51 43.45  24.5w 15VJ172   568  C~2nwD      
2015 09  06.61892  03 12 19.538  +17 51 33.73  25.1w 15VJ172   568  C~2nwD      
2015 09  12.50905  03 12 09.685  +17 50 56.56  25.0w 15VJ172   568  C~2nwD      
2015 10  07.43408  03 10 56.256  +17 46 14.81  24.7w 15VJ172   568  C~2nwD      
2015 10  08.44583  03 10 52.333  +17 45 59.50  25.1w 15VJ172   568  C~2nwD      
2015 10  08.50488  03 10 52.102  +17 45 58.72  24.9w 15VJ172   568  C~2nwD      
2015 11  07.35377  03 08 35.540  +17 37 04.11  24.6r 15VJ172   568  C~2nwD      
2015 11  07.39585  03 08 35.323  +17 37 03.26  24.4r 15VJ172   568  C~2nwD      
2015 11  07.43803  03 08 35.110  +17 37 02.49  24.6r 15VJ172   568  C~2nwD      
2015 11  10.52298  03 08 19.714  +17 36 01.56  24.8w 15VJ172   568  C~2nwD      
2015 11  17.36965  03 07 45.434  +17 33 46.05  24.6w 15VJ172   568  C~2nwD      
2015 11  17.41626  03 07 45.183  +17 33 45.18  24.7w 15VJ172   568  C~2nwD      
2015 12  06.37850  03 06 14.646  +17 27 45.19  24.6w 15VJ172   568  C~2nwD      
2015 12  13.31287  03 05 44.908  +17 25 46.58  24.8w 15VJ172   568  C~2nwD      
2015 12  13.37141  03 05 44.662  +17 25 45.64  24.7w 15VJ172   568  C~2nwD      
2016 01  01.36607  03 04 38.755  +17 21 22.94  24.7w 15VJ172   568  C~2nwD      
2016 01  07.31283  03 04 23.855  +17 20 24.03  24.9w 15VJ172   568  C~2nwD      
2016 02  04.28927  03 03 58.119  +17 18 48.48  24.8w 15VJ172   568  C~2nwD      
2016 02  10.27908  03 04 02.698  +17 19 09.42  25.1w 15VJ172   568  C~2nwD      
2016 09  06.61138  03 17 53.620  +18 15 18.28  25.3w 15VJ172   568  C~2nwD      
2016 09  26.60062  03 17 08.876  +18 12 35.19  24.9w 15VJ172   568  C~2nwD      
2016 10  10.40808  03 16 19.724  +18 09 31.80  24.9w 15VJ172   568  C~2nwD      
2016 10  10.46643  03 16 19.491  +18 09 30.98  24.9w 15VJ172   568  C~2nwD      
2016 10  27.50259  03 15 03.895  +18 04 45.59  24.8w 15VJ172   568  C~2nwD      
2016 11  03.52763  03 14 29.609  +18 02 35.16  24.8w 15VJ172   568  C~2nwD      
2016 12  29.37514  03 10 19.789  +17 46 32.49  24.9w 15VJ172   568  C~2nwD      
2016 12  29.38063  03 10 19.771  +17 46 32.29  24.9w 15VJ172   568  C~2nwD      
2017 01  02.38235  03 10 08.144  +17 45 47.27  24.8w 15VJ172   568  C~2nwD      
2017 01  02.38784  03 10 08.144  +17 45 47.31  24.9w 15VJ172   568  C~2nwD      
2017 01  26.27742  03 09 28.589  +17 43 17.07  25.0w 15VJ172   568  C~2nwD      
2017 12  13.37637  03 16 58.070  +18 14 34.75  24.9w 15VJ172   568  C~2nwD      
2017 12  13.41395  03 16 57.914  +18 14 34.04  24.6w 15VJ172   568  C~2nwD      

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     0.22       0.00    -0.09
     2   0.0713    -68.26    -0.21       8.73     0.37
     3   0.0874   -213.76    -0.09      10.30     0.07
     4   0.1557  -1299.59     0.06      18.48     0.03
     5   0.1584  -1357.68     0.00      18.72    -0.08
     6   0.1586  -1361.07     0.10      18.85     0.01
     7   0.2403  -3384.77    -0.02      29.07    -0.01
     8   0.2404  -3387.99    -0.08      29.09    -0.02
     9   0.2406  -3391.13    -0.05      29.18     0.03
    10   0.2490  -3619.59 (   0.45)     30.11 (  -0.15)
    11   0.2678  -4128.33     0.11      32.63    -0.01
    12   0.2679  -4132.03    -0.08      32.76     0.09
    13   0.3198  -5476.95     0.08      39.38    -0.02
    14   0.3388  -5919.06     0.04      41.83    -0.05
    15   0.3389  -5922.70     0.03      41.89    -0.03
    16   0.3909  -6902.92    -0.08      48.57    -0.13
    17   0.4072  -7124.49     0.12      50.75    -0.07
    18   0.4838  -7505.54     0.00      60.67    -0.02
    19   0.5002  -7436.65    -0.18      62.67    -0.08
    20   1.0733   4903.87    -0.14     134.62    -0.16
    21   1.1281   4245.59     0.10     142.17     0.01
    22   1.1659   3521.28    -0.04     147.20    -0.01
    23   1.1660   3517.86     0.05     147.27     0.01
    24   1.2127   2402.79     0.01     153.47    -0.02
    25   1.2319   1896.69    -0.03     156.00    -0.04
    26   1.3848  -1796.73     0.00     175.08     0.14
    27   1.3848  -1797.03    -0.04     174.95     0.02
    28   1.3958  -1969.12    -0.03     176.17    -0.02
    29   1.3958  -1969.11     0.21     176.21     0.02
    30   1.4612  -2553.87    -0.07     183.51    -0.01
    31   2.3403   4127.90    -0.04     297.63     0.09
    32   2.3404   4125.57     0.04     297.52    -0.03

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.

15VJ172    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        44.318    44.328    44.307
ecceobj         0.084     0.085     0.083
incobj          1.445     1.446     1.446
qmin           39.160    39.118    39.196
qmax           49.079    49.120    48.995
amean          43.966    43.976    43.956
amin           43.601    43.611    43.594
amax           44.345    44.366    44.340
emean           0.089     0.090     0.088
emin            0.071     0.072     0.069
emax            0.107     0.107     0.105
imean           1.105     1.106     1.105
imin            0.147     0.143     0.148
imax            1.733     1.735     1.733
excite_mean     0.092     0.093     0.091
fracstop        1.000     1.000     1.000
cjmean          3.091     3.091     3.091

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       170.3     170.2     170.3
kozaiamp        179.9     180.0     180.0