Orbit Fit and Astrometric record for 15VQ173

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: 15VQ173   
# Created Tue Apr  1 01:10:43 2025
# Orbit generated from Bernstein formalism
# Fitting     35 observations of     35
# Arc:   2.19y
# First observation: 2014/11/17
#  Last observation: 2017/01/26
Preliminary a, adot, b, bdot, g, gdot:
  -0.000019   0.026405  -0.000001   0.000045   0.025373   0.000000
# Chi-squared of fit:     3.98 DOF:     64 RMS:  0.06
# Min/Max residuals:    -0.27    0.15
# Exact a, adot, b, bdot, g, gdot:
  1.571865E-05  2.655539E-02  3.743244E-07  4.767926E-05  2.551176E-02 -2.957360E-04
# Covariance matrix:
  2.7417E-13 -3.7628E-13  1.3180E-15 -1.4195E-15 -1.6366E-13 -4.4714E-12
 -3.7628E-13  7.9130E-13 -3.3220E-15  4.1020E-15  3.9170E-13  1.1894E-11
  1.3180E-15 -3.3220E-15  1.7258E-13 -1.1422E-13 -2.2784E-15 -5.6148E-14
 -1.4195E-15  4.1020E-15 -1.1422E-13  1.0029E-13  1.3994E-15  7.3015E-14
 -1.6366E-13  3.9170E-13 -2.2784E-15  1.3994E-15  3.2476E-13  6.4741E-12
 -4.4714E-12  1.1894E-11 -5.6148E-14  7.3015E-14  6.4741E-12  2.0542E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.853376   47.779728   -0.115019   -0.048777   -0.981557  2456978.772168
# Heliocentric elements and errors
Epoch:              2456970.5000  =  2014/11/09
Mean Anomaly:          354.77717 +/-     0.265
Argument of Peri:      278.63509 +/-     0.329
Long of Asc Node:      135.73605 +/-     0.014
Inclination:             2.78574 +/-     0.000
Eccentricity:         0.10333787 +/-    0.0001
Semi-Major Axis:     44.78246365 +/-    0.0031
Time of Perihelion: 2458558.5474 +/-      80.7
Perihelion:          40.15473921 +/-    0.0044
Aphelion:            49.41018809 +/-    0.0048
Period (y)              299.6886 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           26.87956348 +/-    0.0006
Ecliptic Y           29.79905114 +/-    0.0007
Ecliptic Z           -1.95126380 +/-    0.0000
Ecliptic XDOT        -0.00213591 +/-    0.0000
Ecliptic YDOT         0.00188680 +/-    0.0000
Ecliptic ZDOT         0.00000679 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.17837493 +/-    0.0006
Geocenter to KBO     39.19760211 +/-    0.0009
# Hcoef:  7.46

The following table shows the complete astrometric record for 15VQ173. 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 (15VQ173) followed by the observatory code and reference code for the source of the astrometry.

2014 11  17.27139  03 04 33.729  +14 23 28.70  23.4r 15VQ173   568  C~2nwI      
2014 11  17.38009  03 04 33.162  +14 23 26.52  23.3r 15VQ173   568  C~2nwI      
2014 11  17.49387  03 04 32.576  +14 23 24.15  23.4r 15VQ173   568  C~2nwI      
2014 11  19.28114  03 04 23.647  +14 22 48.14  23.5r 15VQ173   568  C~2nwI      
2014 11  23.38468  03 04 03.274  +14 21 27.20  23.5r 15VQ173   568  C~2nwI      
2015 08  11.58456  03 15 13.935  +15 11 19.80  23.7w 15VQ173   568  C~2nwI      
2015 09  06.63168  03 15 12.057  +15 09 21.89  23.6w 15VQ173   568  C~2nwI      
2015 09  12.52133  03 15 02.629  +15 08 21.28  23.7w 15VQ173   568  C~2nwI      
2015 10  07.45992  03 13 49.863  +15 02 11.14  23.8w 15VQ173   568  C~2nwI      
2015 10  08.46335  03 13 45.967  +15 01 53.10  23.7w 15VQ173   568  C~2nwI      
2015 10  08.52236  03 13 45.732  +15 01 52.04  23.9w 15VQ173   568  C~2nwI      
2015 11  07.36952  03 11 28.000  +14 51 57.91  23.4r 15VQ173   568  C~2nwI      
2015 11  07.41164  03 11 27.787  +14 51 57.00  23.5r 15VQ173   568  C~2nwI      
2015 11  07.45387  03 11 27.565  +14 51 56.12  23.4r 15VQ173   568  C~2nwI      
2015 11  10.54061  03 11 11.904  +14 50 52.60  23.6w 15VQ173   568  C~2nwI      
2015 11  17.38710  03 10 37.127  +14 48 34.01  23.6w 15VQ173   568  C~2nwI      
2015 11  17.43381  03 10 36.888  +14 48 33.13  23.5w 15VQ173   568  C~2nwI      
2015 12  06.39596  03 09 04.682  +14 42 43.94  23.7w 15VQ173   568  C~2nwI      
2015 12  13.33048  03 08 34.320  +14 40 56.17  23.7w 15VQ173   568  C~2nwI      
2015 12  13.38903  03 08 34.068  +14 40 55.30  23.6w 15VQ173   568  C~2nwI      
2016 01  01.38342  03 07 26.584  +14 37 18.96  23.8w 15VQ173   568  C~2nwI      
2016 01  02.34977  03 07 23.887  +14 37 11.63  23.8w 15VQ173   568  C~2nwI      
2016 01  07.33018  03 07 11.262  +14 36 38.98  23.7w 15VQ173   568  C~2nwI      
2016 02  05.27611  03 06 44.923  +14 36 56.59  23.8w 15VQ173   568  C~2nwI      
2016 02  10.29646  03 06 49.009  +14 37 36.27  23.5w 15VQ173   568  C~2nwI      
2016 09  06.59818  03 21 10.787  +15 32 52.74  23.8w 15VQ173   568  C~2nwI      
2016 09  26.59251  03 20 27.334  +15 28 53.37  23.9w 15VQ173   568  C~2nwI      
2016 10  10.39652  03 19 38.493  +15 25 06.64  23.8w 15VQ173   568  C~2nwI      
2016 10  10.45485  03 19 38.257  +15 25 05.64  23.7w 15VQ173   568  C~2nwI      
2016 11  02.54892  03 17 52.576  +15 17 40.48  23.6w 15VQ173   568  C~2nwI      
2016 11  04.42405  03 17 43.196  +15 17 02.82  23.7w 15VQ173   568  C~2nwI      
2016 12  24.31885  03 13 50.247  +15 02 59.60  23.8w 15VQ173   568  C~2nwI      
2017 01  02.42106  03 13 21.209  +15 01 35.90  23.8w 15VQ173   568  C~2nwI      
2017 01  26.30729  03 12 40.215  +15 00 31.92  23.8w 15VQ173   568  C~2nwI      
2017 01  26.33541  03 12 40.190  +15 00 32.02  23.8w 15VQ173   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     0.15       0.00    -0.07
     2   0.0003     -8.52    -0.02       0.18    -0.01
     3   0.0006    -17.36    -0.09       0.25    -0.05
     4   0.0055   -151.99     0.03       1.45    -0.05
     5   0.0167   -458.87    -0.10       5.46     0.03
     6   0.7319   9722.41     0.04     254.78    -0.06
     7   0.8032   9664.87    -0.27     148.14     0.10
     8   0.8193   9516.87     0.05     125.79    -0.02
     9   0.8876   8400.46     0.04      48.54    -0.02
    10   0.8903   8341.16     0.01      46.17    -0.00
    11   0.8905   8337.59     0.03      46.05    -0.00
    12   0.9722   6252.72     0.04       7.26     0.10
    13   0.9723   6249.50     0.07       7.21     0.05
    14   0.9724   6246.16     0.01       7.23     0.05
    15   0.9809   6010.17    -0.02       7.08     0.03
    16   0.9996   5486.79     0.01       9.38    -0.01
    17   0.9998   5483.21     0.05       9.47     0.03
    18   1.0517   4100.42     0.02      34.90    -0.04
    19   1.0707   3647.01     0.04      50.77    -0.03
    20   1.0708   3643.26     0.02      50.92    -0.04
    21   1.1228   2641.78    -0.10     109.47    -0.09
    22   1.1255   2602.12    -0.07     113.11     0.06
    23   1.1391   2416.89     0.02     131.74     0.09
    24   1.2184   2053.93    -0.01     253.22     0.02
    25   1.2321   2121.84     0.05     275.16     0.04
    26   1.8051  15061.79     0.01     154.53    -0.00
    27   1.8599  14389.82    -0.03      85.33    -0.01
    28   1.8977  13645.62     0.01      49.28     0.00
    29   1.8978  13642.05     0.05      49.20     0.02
    30   1.9611  12044.06    -0.04      17.77     0.01
    31   1.9662  11902.74     0.01      16.94    -0.00
    32   2.1028   8418.74     0.05      93.81     0.02
    33   2.1277   7990.32    -0.00     125.18    -0.05
    34   2.1931   7400.06     0.01     222.13    -0.09
    35   2.1932   7399.74    -0.09     222.32    -0.02

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.

15VQ173    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        45.154    45.163    45.145
ecceobj         0.110     0.110     0.110
incobj          2.785     2.785     2.785
qmin           39.050    39.058    39.070
qmax           50.780    50.835    50.754
amean          44.768    44.780    44.759
amin           44.412    44.414    44.391
amax           45.173    45.201    45.163
emean           0.109     0.109     0.109
emin            0.094     0.094     0.095
emax            0.125     0.125     0.124
imean           2.193     2.186     2.195
imin            1.473     1.474     1.473
imax            2.884     2.875     2.888
excite_mean     0.116     0.116     0.116
fracstop        1.000     1.000     1.000
cjmean          3.095     3.095     3.094

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     184.2     183.5
kozaiamp        180.0     179.9     180.0