Orbit Fit and Astrometric record for 15RA278

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: 15RA278   
# Created Sat Apr 20 01:10:10 2019
# Orbit generated from Bernstein formalism
# Fitting   27 observations of   27
# Arc:   2.44y
# First observation: 2015/07/14
#  Last observation: 2017/12/23
Preliminary a, adot, b, bdot, g, gdot:
  -0.000090   0.025953  -0.000017  -0.005112   0.024406   0.000000
# Chi-squared of fit:     5.61 DOF:   48 RMS:  0.08
# Min/Max residuals:    -0.16    0.24
# Exact a, adot, b, bdot, g, gdot:
  1.649405E-05  2.581897E-02 -3.207103E-06 -5.138733E-03  2.433627E-02  8.218875E-03
# Covariance matrix:
  1.9160E-13  3.7374E-14  1.6948E-15 -2.2398E-14  1.6373E-13  2.2294E-12
  3.7374E-14  5.0464E-13  2.1043E-14 -1.2289E-13  3.5700E-13  1.2028E-11
  1.6948E-15  2.1043E-14  1.0839E-13 -8.0255E-14  1.3637E-14  7.0362E-13
 -2.2398E-14 -1.2289E-13 -8.0255E-14  1.3955E-13 -9.4858E-14 -3.8675E-12
  1.6373E-13  3.5700E-13  1.3637E-14 -9.4858E-14  3.9571E-13  9.3299E-12
  2.2294E-12  1.2028E-11  7.0362E-13 -3.8675E-12  9.3299E-12  3.7784E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.280203   12.007662    1.002792    0.006976   -0.172654  2457218.063999
# Heliocentric elements and errors
Epoch:              2457210.5000  =  2015/07/07
Mean Anomaly:           22.66465 +/-     0.029
Argument of Peri:      112.17154 +/-     0.064
Long of Asc Node:      201.99407 +/-     0.001
Inclination:            11.36131 +/-     0.001
Eccentricity:         0.42486709 +/-    0.0008
Semi-Major Axis:     62.25806204 +/-    0.0502
Time of Perihelion: 2445914.1456 +/-       5.1
Perihelion:          35.80666017 +/-    0.0558
Aphelion:            88.70946391 +/-    0.0860
Period (y)              491.2489 +/-      0.59
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           40.53407525 +/-    0.0010
Ecliptic Y            7.59737010 +/-    0.0002
Ecliptic Z            1.63478664 +/-    0.0000
Ecliptic XDOT         0.00031960 +/-    0.0000
Ecliptic YDOT         0.00303181 +/-    0.0000
Ecliptic ZDOT        -0.00054080 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.27231294 +/-    0.0010
Geocenter to KBO     41.09093709 +/-    0.0011
# Hcoef:  9.29

The following table shows the complete astrometric record for 15RA278. 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 (15RA278) followed by the observatory code and reference code for the source of the astrometry.

2015 07  14.56321  00 40 34.993  +06 50 43.80  25.9r 15RA278   568  C~2lVO      
2015 07  19.54121  00 40 33.909  +06 50 39.02  25.1r 15RA278   568  C~2lVO      
2015 08  13.49630  00 39 57.446  +06 46 50.51  24.9r 15RA278   568  C~2lVO      
2015 08  20.43431  00 39 38.912  +06 44 49.95  24.9r 15RA278   568  C~2lVO      
2015 08  20.48358  00 39 38.778  +06 44 49.11  25.2r 15RA278   568  C~2lVO      
2015 09  07.58083  00 38 36.864  +06 37 56.75  25.7w 15RA278   568  C~2lVO      
2015 09  09.40852  00 38 29.717  +06 37 08.54  25.1r 15RA278   568  C~2lVO      
2015 09  09.44963  00 38 29.553  +06 37 07.46  25.0r 15RA278   568  C~2lVO      
2015 09  09.49055  00 38 29.393  +06 37 06.31  25.1r 15RA278   568  C~2lVO      
2015 09  10.51481  00 38 25.328  +06 36 38.81  25.4w 15RA278   568  C~2lVP      
2015 10  08.36567  00 36 25.514  +06 22 43.75  25.0w 15RA278   568  C~2lVP      
2015 10  08.41827  00 36 25.270  +06 22 41.98  25.7w 15RA278   568  C~2lVP      
2015 10  09.33526  00 36 21.244  +06 22 13.09  25.8w 15RA278   568  C~2lVP      
2015 11  10.46169  00 34 14.188  +06 06 16.62  26.1w 15RA278   568  C~2lVP      
2015 12  08.25986  00 33 11.717  +05 56 49.76  25.4w 15RA278   568  C~2lVP      
2016 01  01.32225  00 33 10.823  +05 54 05.46  25.8w 15RA278   568  C~2lVP      
2016 09  05.50664  00 44 42.007  +06 57 10.85  25.2w 15RA278   568  C~2lVP      
2016 09  06.46082  00 44 38.439  +06 56 46.57  26.3w 15RA278   568  C~2lVP      
2016 09  06.50211  00 44 38.289  +06 56 45.73  26.0w 15RA278   568  C~2lVP      
2016 09  26.45968  00 43 16.169  +06 47 23.43  24.9w 15RA278   568  C~2lVP      
2016 11  04.27703  00 40 33.397  +06 27 45.32  25.8w 15RA278   568  C~2lVP      
2016 11  04.33644  00 40 33.186  +06 27 43.58  26.4w 15RA278   568  C~2lVP      
2016 12  29.27436  00 39 02.388  +06 12 54.94  25.1w 15RA278   568  C~2lVP      
2017 01  03.24627  00 39 07.027  +06 12 54.19  25.7w 15RA278   568  C~2lVP      
2017 09  16.51398  00 49 55.166  +07 10 33.69  25.4w 15RA278   568  C~2lVP      
2017 09  22.46739  00 49 30.431  +07 07 44.47  25.5w 15RA278   568  C~2lVP      
2017 12  23.28322  00 44 49.891  +06 31 36.79  26.0w 15RA278   568  C~2lVP      

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     0.06       0.00    -0.03
  2   0.0136    -16.73    -0.07       1.93    -0.12
  3   0.0820   -605.92    -0.03       4.61    -0.05
  4   0.1009   -907.17    -0.16       2.00     0.04
  5   0.1011   -909.33     0.05       2.01     0.05
  6   0.1506  -1919.60     0.13     -15.16    -0.11
  7   0.1556  -2036.48    -0.06     -17.67     0.10
  8   0.1557  -2039.15    -0.03     -17.70     0.10
  9   0.1559  -2041.79     0.02     -17.82     0.02
 10   0.1587  -2108.30     0.07     -19.32     0.07
 11   0.2349  -4078.96     0.12     -84.70    -0.06
 12   0.2351  -4083.00    -0.03     -84.90    -0.12
 13   0.2376  -4149.57     0.07     -87.82    -0.08
 14   0.3255  -6269.14    -0.02    -219.88     0.24
 15   0.4016  -7350.33    -0.02    -372.71    -0.01
 16   0.4675  -7427.62    -0.08    -518.46     0.04
 17   1.1470   3537.41    -0.11   -1081.65     0.05
 18   1.1496   3479.00    -0.05   -1083.29    -0.12
 19   1.1497   3476.61     0.16   -1083.20     0.02
 20   1.2044   2130.91     0.02   -1123.61    -0.07
 21   1.3106   -562.08    -0.04   -1258.93     0.05
 22   1.3108   -565.65     0.04   -1259.30    -0.09
 23   1.4612  -2159.49    -0.03   -1545.85     0.00
 24   1.4748  -2096.16    -0.05   -1573.69     0.10
 25   2.1765   8148.90    -0.09   -2154.47    -0.00
 26   2.1928   7743.33     0.03   -2167.79    -0.08
 27   2.4441   3047.41     0.10   -2540.37     0.07

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.

15RA278    quality flag:3

Type:          3:1EE     3:1EE     3:1EE

axisobj        63.262    63.415    63.111
ecceobj         0.433     0.435     0.431
incobj         11.318    11.318    11.318
qmin           34.244    35.073    34.159
qmax           92.763    92.015    92.951
amean          62.630    62.629    62.630
amin           61.748    61.668    61.721
amax           63.906    63.850    63.871
emean           0.438     0.428     0.438
emin            0.419     0.415     0.417
emax            0.453     0.441     0.456
imean          10.155    11.520    10.009
imin            9.300    11.258     8.846
imax           11.605    11.793    11.603
excite_mean     0.472     0.473     0.471
fracstop        1.000     1.000     1.000
cjmean          3.033     3.034     3.034

libcent 0        81.7     180.3      81.1
libamp  0        44.7     152.8      42.8
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       143.8     179.4     134.5
kozaiamp         42.1     180.0      32.5