Orbit Fit and Astrometric record for 15VL173

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: 15VL173   
# Created Tue Apr  1 01:10:43 2025
# Orbit generated from Bernstein formalism
# Fitting     36 observations of     36
# Arc:   3.08y
# First observation: 2014/11/17
#  Last observation: 2017/12/16
Preliminary a, adot, b, bdot, g, gdot:
  -0.000059   0.022954  -0.000002  -0.000326   0.023626   0.000000
# Chi-squared of fit:    12.05 DOF:     66 RMS:  0.10
# Min/Max residuals:    -0.20    0.34
# Exact a, adot, b, bdot, g, gdot:
  1.536818E-05  2.298689E-02  3.050627E-08 -3.262890E-04  2.370488E-02 -1.594178E-03
# Covariance matrix:
  2.4778E-13 -2.8040E-13 -6.5043E-16  2.2709E-15 -1.1174E-13 -2.7828E-12
 -2.8040E-13  4.6435E-13  1.1083E-15 -4.6946E-15  2.5529E-13  5.6132E-12
 -6.5043E-16  1.1083E-15  1.4342E-13 -7.6136E-14 -7.1438E-17  1.3848E-14
  2.2709E-15 -4.6946E-15 -7.6136E-14  5.6742E-14 -3.5960E-15 -6.5851E-14
 -1.1174E-13  2.5529E-13 -7.1438E-17 -3.5960E-15  2.9016E-13  3.7555E-12
 -2.7828E-12  5.6132E-12  1.3848E-14 -6.5851E-14  3.7555E-12  7.7731E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.237174   48.040862   -0.110539   -0.038238   -0.982538  2456978.772168
# Heliocentric elements and errors
Epoch:              2456970.5000  =  2014/11/09
Mean Anomaly:          299.92718 +/-     0.079
Argument of Peri:      317.77034 +/-     0.117
Long of Asc Node:      158.45839 +/-     0.014
Inclination:             2.33041 +/-     0.000
Eccentricity:         0.07674091 +/-    0.0004
Semi-Major Axis:     44.67003091 +/-    0.0044
Time of Perihelion: 2475167.4381 +/-      23.8
Perihelion:          41.24201203 +/-    0.0169
Aphelion:            48.09804978 +/-    0.0171
Period (y)              298.5607 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           28.75577344 +/-    0.0006
Ecliptic Y           32.15269797 +/-    0.0007
Ecliptic Z           -1.64676724 +/-    0.0000
Ecliptic XDOT        -0.00210253 +/-    0.0000
Ecliptic YDOT         0.00163221 +/-    0.0000
Ecliptic ZDOT        -0.00003037 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.16714417 +/-    0.0007
Geocenter to KBO     42.18541340 +/-    0.0010
# Hcoef:  8.45

The following table shows the complete astrometric record for 15VL173. 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 (15VL173) followed by the observatory code and reference code for the source of the astrometry.

2014 11  17.27139  03 04 53.802  +15 03 19.97  24.2r 15VL173   568  C~2nwH      
2014 11  17.38009  03 04 53.286  +15 03 17.97  24.5r 15VL173   568  C~2nwH      
2014 11  17.49387  03 04 52.727  +15 03 15.64  24.7r 15VL173   568  C~2nwH      
2014 11  19.28114  03 04 44.292  +15 02 41.09  24.8r 15VL173   568  C~2nwH      
2014 11  23.38468  03 04 25.047  +15 01 23.15  24.9r 15VL173   568  C~2nwH      
2015 08  11.61007  03 14 35.956  +15 44 59.77  25.2w 15VL173   568  C~2nwH      
2015 10  07.45292  03 13 13.524  +15 36 42.61  24.8w 15VL173   568  C~2nwH      
2015 10  08.45753  03 13 09.818  +15 36 25.88  24.9w 15VL173   568  C~2nwH      
2015 11  07.36426  03 10 59.266  +15 27 05.50  24.9r 15VL173   568  C~2nwH      
2015 11  07.40638  03 10 59.065  +15 27 04.72  24.8r 15VL173   568  C~2nwH      
2015 11  07.44859  03 10 58.857  +15 27 03.93  24.7r 15VL173   568  C~2nwH      
2015 11  10.53471  03 10 44.059  +15 26 03.38  25.1w 15VL173   568  C~2nwH      
2015 11  17.38127  03 10 11.226  +15 23 50.87  24.7w 15VL173   568  C~2nwH      
2015 11  17.42797  03 10 10.999  +15 23 49.97  24.9w 15VL173   568  C~2nwH      
2015 12  06.39016  03 08 43.905  +15 18 11.42  25.5w 15VL173   568  C~2nwH      
2015 12  13.32462  03 08 15.191  +15 16 24.88  25.0w 15VL173   568  C~2nwH      
2015 12  13.38310  03 08 14.964  +15 16 23.95  24.9w 15VL173   568  C~2nwH      
2016 01  01.37764  03 07 10.944  +15 12 42.33  25.0w 15VL173   568  C~2nwH      
2016 01  07.32440  03 06 56.323  +15 11 57.83  25.0w 15VL173   568  C~2nwH      
2016 02  04.30735  03 06 29.791  +15 11 33.27  25.7w 15VL173   568  C~2nwH      
2016 02  04.31413  03 06 29.773  +15 11 33.08  25.1w 15VL173   568  C~2nwH      
2016 02  04.32803  03 06 29.801  +15 11 33.02  25.7w 15VL173   568  C~2nwH      
2016 02  05.26985  03 06 30.177  +15 11 37.59  25.3w 15VL173   568  C~2nwH      
2016 02  10.29068  03 06 33.727  +15 12 08.14  24.1w 15VL173   568  C~2nwH      
2016 09  06.59240  03 19 46.705  +16 02 36.63  25.1w 15VL173   568  C~2nwH      
2016 09  26.58845  03 19 04.469  +15 58 55.68  24.9w 15VL173   568  C~2nwH      
2016 10  10.39070  03 18 17.778  +15 55 23.56  25.1w 15VL173   568  C~2nwH      
2016 11  02.54892  03 16 37.270  +15 48 21.43  25.0w 15VL173   568  C~2nwH      
2016 12  24.30148  03 12 48.432  +15 34 02.06  25.1w 15VL173   568  C~2nwH      
2017 01  02.40371  03 12 20.930  +15 32 34.26  24.9w 15VL173   568  C~2nwH      
2017 01  26.29235  03 11 41.715  +15 31 06.92  25.0w 15VL173   568  C~2nwH      
2017 09  15.57624  03 24 50.076  +16 20 15.99  24.8w 15VL173   568  C~2nwH      
2017 09  16.60944  03 24 48.041  +16 20 05.33  24.9w 15VL173   568  C~2nwH      
2017 09  21.62152  03 24 36.934  +16 19 09.39  25.1w 15VL173   568  C~2nwH      
2017 09  23.54857  03 24 32.115  +16 18 45.82        15VL173   568  C~2nwH      
2017 12  16.35462  03 18 36.388  +15 55 25.64  24.9w 15VL173   568  C~2nwH      

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    -0.01       0.00    -0.05
     2   0.0003     -7.74     0.13       0.14     0.01
     3   0.0006    -16.16    -0.05       0.13    -0.06
     4   0.0055   -143.14     0.00       0.58    -0.08
     5   0.0167   -432.62    -0.20       2.54    -0.10
     6   0.7319   8786.16    -0.05     133.65    -0.03
     7   0.8876   7504.45    -0.07     -29.91    -0.01
     8   0.8903   7448.32    -0.09     -31.79     0.09
     9   0.9722   5478.44     0.02     -67.13    -0.02
    10   0.9723   5475.43     0.08     -67.10     0.01
    11   0.9724   5472.32     0.05     -67.06     0.06
    12   0.9809   5249.81    -0.14     -67.86     0.02
    13   0.9996   4756.60    -0.02     -67.63     0.04
    14   0.9997   4753.19    -0.02     -67.61     0.03
    15   1.0517   3448.25    -0.08     -52.91     0.10
    16   1.0706   3019.36    -0.07     -42.67     0.17
    17   1.0708   3015.94     0.05     -42.67     0.05
    18   1.1228   2063.94    -0.06      -3.61    -0.05
    19   1.1391   1848.18     0.06      11.37    -0.12
    20   1.2157   1472.01     0.34      92.76     0.25
    21   1.2157   1471.71     0.00      92.65     0.11
    22   1.2158   1472.08     0.30      92.48    -0.10
    23   1.2183   1478.57    -0.03      95.38    -0.05
    24   1.2321   1536.36    -0.06     110.71     0.04
    25   1.8051  13402.99    -0.03     -19.30     0.02
    26   1.8599  12754.99     0.30     -75.07    -0.05
    27   1.8977  12047.05     0.04    -104.93    -0.10
    28   1.9611  10532.41    -0.08    -133.43    -0.10
    29   2.1028   7111.76    -0.04     -88.12    -0.02
    30   2.1277   6704.86    -0.11     -66.65    -0.05
    31   2.1931   6134.85    -0.09       0.84     0.00
    32   2.8290  17924.77     0.06    -112.78     0.03
    33   2.8319  17893.50     0.02    -115.70     0.04
    34   2.8456  17723.41     0.11    -129.44     0.10
    35   2.8509  17649.79    -0.07    -134.71    -0.08
    36   3.0803  12307.69    -0.19    -172.88    -0.10

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.

15VL173    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        44.994    45.005    44.983
ecceobj         0.076     0.076     0.075
incobj          2.325     2.325     2.325
qmin           40.368    40.326    40.363
qmax           49.196    49.234    49.136
amean          44.646    44.657    44.635
amin           44.288    44.300    44.275
amax           45.027    45.039    45.011
emean           0.077     0.078     0.077
emin            0.062     0.062     0.062
emax            0.093     0.094     0.092
imean           2.286     2.286     2.287
imin            1.658     1.658     1.657
imax            2.929     2.927     2.929
excite_mean     0.087     0.088     0.087
fracstop        1.000     1.000     1.000
cjmean          3.100     3.100     3.100

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       184.7     184.9     185.2
kozaiamp        180.0     180.0     180.0