Orbit Fit and Astrometric record for 15VX184

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: 15VX184   
# Created Fri Dec  3 02:13:44 2021
# Orbit generated from Bernstein formalism
# Fitting     19 observations of     20
# Arc:   2.25y
# First observation: 2015/11/07
#  Last observation: 2018/02/06
Preliminary a, adot, b, bdot, g, gdot:
   0.000001   0.013345   0.000033   0.008390   0.018318   0.000000
# Chi-squared of fit:    22.16 DOF:     32 RMS:  0.19
# Min/Max residuals:    -0.37    0.47
# Exact a, adot, b, bdot, g, gdot:
  1.103046E-05  1.333223E-02  8.809725E-06  8.388484E-03  1.803286E-02 -4.784765E-03
# Covariance matrix:
  3.9205E-13 -4.1298E-13  4.7293E-14 -1.4429E-13 -2.3124E-13 -7.6360E-12
 -4.1298E-13  8.6392E-13 -1.3898E-13  4.3355E-13  5.2601E-13  2.3671E-11
  4.7293E-14 -1.3898E-13  3.2861E-13 -2.6430E-13 -1.1079E-13 -4.5675E-12
 -1.4429E-13  4.3355E-13 -2.6430E-13  4.0658E-13  3.3257E-13  1.4255E-11
 -2.3124E-13  5.2601E-13 -1.1079E-13  3.3257E-13  6.2899E-13  1.7187E-11
 -7.6360E-12  2.3671E-11 -4.5675E-12  1.4255E-11  1.7187E-11  7.7875E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   10.885649   27.803140   -0.279956    0.180381   -0.937090  2457333.726999
# Heliocentric elements and errors
Epoch:              2457330.5000  =  2015/11/04
Mean Anomaly:          319.73117 +/-     0.092
Argument of Peri:       94.65366 +/-     0.088
Long of Asc Node:       11.61010 +/-     0.001
Inclination:            33.66937 +/-     0.001
Eccentricity:         0.34147334 +/-    0.0019
Semi-Major Axis:     69.44362323 +/-    0.1025
Time of Perihelion: 2480974.0956 +/-      13.8
Perihelion:          45.73047713 +/-    0.1466
Aphelion:            93.15676934 +/-    0.1893
Period (y)              578.7044 +/-      1.28
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           48.87927800 +/-    0.0021
Ecliptic Y           26.09263615 +/-    0.0011
Ecliptic Z           10.47299338 +/-    0.0005
Ecliptic XDOT        -0.00178933 +/-    0.0000
Ecliptic YDOT         0.00133888 +/-    0.0000
Ecliptic ZDOT         0.00111352 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   56.38876723 +/-    0.0019
Geocenter to KBO     55.45432450 +/-    0.0024
# Hcoef:  6.15

The following table shows the complete astrometric record for 15VX184. 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 (15VX184) followed by the observatory code and reference code for the source of the astrometry.

2015 11  07.22621  01 26 40.510  +20 49 18.94  23.5r 15VX184   568  C~3wqO      
2015 11  07.43495  01 26 39.750  +20 49 14.93  23.5r 15VX184   568  C~3wqO      
2015 12  09.15348  01 25 05.621  +20 39 12.12        15VX184   304  C~3wqO      
2016 09  27.30652  01 31 30.632  +21 43 52.34        15VX184   304  C~3wqO      
2016 09  27.32771  01 31 30.549  +21 43 52.02        15VX184   304  C~3wqO      
2016 09  28.23851  01 31 27.219  +21 43 42.98        15VX184   304  C~3wqO      
2016 10  01.25708  01 31 15.964  +21 43 10.54        15VX184   304  C~3wqO      
2016 10  01.31581  01 31 15.752  +21 43 09.81        15VX184   304  C~3wqO      
2016 11  02.12861  01 29 12.607  +21 34 48.34        15VX184   304  C~3wqO      
2016 11  03.11572  01 29 08.908  +21 34 29.50        15VX184   304  C~3wqO      
2016 12  02.20776  01 27 34.718  +21 24 59.87        15VX184   G37  C~3wqO      
2016 12  02.29052  01 27 34.458  +21 24 58.17        15VX184   G37  C~3wqO      
2017 09  21.22221  01 34 13.454  +22 28 57.05  23.6r 15VX184   G37  C~3wqO      
2017 09  21.22945  01 34 13.430  +22 28 56.94  23.5r 15VX184   G37  C~3wqO      
2017 09  21.26870  01 34 13.297  +22 28 56.92  23.6r 15VX184   G37  C~3wqO      
2017 09  21.27599  01 34 13.271  +22 28 56.82  23.5r 15VX184   G37  C~3wqO      
2017 09  22.21906  01 34 09.962  +22 28 50.12  23.7r 15VX184   G37  C~3wqO      
2018 02  06.10954  01 29 26.902  +21 58 14.05        15VX184   G37  C~3wqO      
2018 02  06.15773  01 29 27.013  +21 58 14.33        15VX184   G37  C~3wqO      
2018 02  06.16537  01 29 27.032  +21 58 14.28        15VX184   G37  C~3wqO      

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     0.14       0.00    -0.30
     2   0.0006    -11.38     0.21       0.30    -0.31
     3   0.0874  -1461.73     0.06     -59.31    -0.37
     4   0.8900   4984.39     0.01    1525.34     0.11
     5   0.8901   4983.20    -0.09    1525.47     0.04
     6   0.8926   4936.71     0.06    1534.21     0.15
     7   0.9008   4778.90    -0.26    1562.02     0.47
     8   0.9010   4775.89    -0.13    1562.44     0.35
     9   0.9881   2994.86    -0.21    1734.04     0.34
    10   0.9908   2939.94    -0.15    1735.79     0.30
    11   1.0704   1507.50 (   0.59)   1699.05 (  -0.06)
    12   1.0707   1503.50    -0.02    1698.83     0.04
    13   1.8727   8086.05     0.00    3211.70    -0.18
    14   1.8727   8085.70     0.00    3211.72    -0.25
    15   1.8728   8083.97     0.16    3212.37    -0.05
    16   1.8728   8083.60     0.14    3212.41    -0.09
    17   1.8754   8038.39     0.01    3222.92     0.05
    18   2.2502   3703.68    -0.16    2964.77    -0.11
    19   2.2503   3705.22     0.10    2964.46    -0.05
    20   2.2503   3705.45     0.13    2964.31    -0.14

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.

15VX184    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        70.284    70.579    69.996
ecceobj         0.344     0.349     0.338
incobj         33.474    33.473    33.476
qmin           45.098    44.893    45.192
qmax           95.316    96.087    94.985
amean          69.632    69.915    69.416
amin           68.838    69.140    68.595
amax           70.614    70.918    70.456
emean           0.333     0.340     0.322
emin            0.317     0.326     0.303
emax            0.350     0.355     0.348
imean          34.003    33.967    34.207
imin           33.606    33.607    33.583
imax           34.476    34.349    34.720
excite_mean     0.651     0.654     0.648
fracstop        1.000     1.000     1.000
cjmean          2.810     2.808     2.811

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       190.3     183.8     197.9
kozaiamp         96.9      90.4     109.5