Orbit Fit and Astrometric record for 15RF278

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: 15RF278   
# Created Thu Apr 18 01:10:35 2019
# Orbit generated from Bernstein formalism
# Fitting   35 observations of   35
# Arc:   2.25y
# First observation: 2015/06/23
#  Last observation: 2017/09/22
Preliminary a, adot, b, bdot, g, gdot:
  -0.000082   0.023504   0.000004  -0.000415   0.023912   0.000000
# Chi-squared of fit:     6.52 DOF:   64 RMS:  0.08
# Min/Max residuals:    -0.16    0.21
# Exact a, adot, b, bdot, g, gdot:
  1.485870E-05  2.292895E-02 -1.164228E-07 -4.092138E-04  2.349319E-02 -1.256951E-03
# Covariance matrix:
  1.7593E-13  1.1269E-14 -4.1772E-15  1.5729E-17  1.4443E-13  2.2145E-12
  1.1269E-14  3.3986E-13 -6.8648E-15 -5.7526E-16  2.7398E-13  8.8845E-12
 -4.1772E-15 -6.8648E-15  1.0412E-13 -7.7464E-14 -9.5865E-15 -2.0623E-13
  1.5729E-17 -5.7526E-16 -7.7464E-14  9.4465E-14 -3.8851E-16 -2.6413E-14
  1.4443E-13  2.7398E-13 -9.5865E-15 -3.8851E-16  3.5734E-13  8.7872E-12
  2.2145E-12  8.8845E-12 -2.0623E-13 -2.6413E-14  8.7872E-12  3.4658E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.171409    7.938052    1.010428   -0.004051    0.109300  2457197.056068
# Heliocentric elements and errors
Epoch:              2457190.5000  =  2015/06/17
Mean Anomaly:          291.10116 +/-     0.059
Argument of Peri:      192.08966 +/-     0.137
Long of Asc Node:      252.54489 +/-     0.017
Inclination:             2.38295 +/-     0.000
Eccentricity:         0.08322208 +/-    0.0008
Semi-Major Axis:     43.49614357 +/-    0.0064
Time of Perihelion: 2477243.7123 +/-      16.7
Perihelion:          39.87630415 +/-    0.0356
Aphelion:            47.11598298 +/-    0.0358
Period (y)              286.8695 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           42.15511396 +/-    0.0011
Ecliptic Y            4.85880124 +/-    0.0001
Ecliptic Z            1.61282654 +/-    0.0000
Ecliptic XDOT        -0.00051467 +/-    0.0000
Ecliptic YDOT         0.00262029 +/-    0.0000
Ecliptic ZDOT        -0.00005314 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.46484183 +/-    0.0011
Geocenter to KBO     42.56553244 +/-    0.0011
# Hcoef:  8.25

The following table shows the complete astrometric record for 15RF278. 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 (15RF278) followed by the observatory code and reference code for the source of the astrometry.

2015 06  23.55529  00 25 43.280  +05 08 37.98  24.6r 15RF278   568  C~2lVP      
2015 07  14.60008  00 25 51.781  +05 10 38.84  23.8r 15RF278   568  C~2lVP      
2015 07  19.57915  00 25 48.315  +05 10 31.64  24.1r 15RF278   568  C~2lVP      
2015 08  19.60440  00 24 43.738  +05 04 57.23  24.4r 15RF278   568  C~2lVP      
2015 08  20.40889  00 24 41.193  +05 04 42.34  24.3r 15RF278   568  C~2lVP      
2015 08  20.45757  00 24 41.029  +05 04 41.39  24.6r 15RF278   568  C~2lVP      
2015 09  07.55453  00 23 34.930  +04 58 04.36  24.7w 15RF278   568  C~2lVP      
2015 09  09.38065  00 23 27.514  +04 57 18.39  24.3r 15RF278   568  C~2lVP      
2015 09  09.42501  00 23 27.324  +04 57 17.20  24.8r 15RF278   568  C~2lVP      
2015 09  09.46595  00 23 27.160  +04 57 16.15  24.5r 15RF278   568  C~2lVP      
2015 09  10.48959  00 23 22.941  +04 56 49.99  24.6w 15RF278   568  C~2lVP      
2015 09  18.44605  00 22 49.203  +04 53 18.01  25.4w 15RF278   568  C~2lVP      
2015 10  08.33404  00 21 21.672  +04 43 50.25  24.4w 15RF278   568  C~2lVP      
2015 10  08.38664  00 21 21.440  +04 43 48.70  24.7w 15RF278   568  C~2lVP      
2015 10  09.30372  00 21 17.456  +04 43 22.13  24.4w 15RF278   568  C~2lVP      
2015 11  10.42944  00 19 14.498  +04 29 10.59  24.7w 15RF278   568  C~2lVP      
2015 12  08.22831  00 18 18.089  +04 21 37.65  24.4w 15RF278   568  C~2lVP      
2016 01  01.29102  00 18 22.278  +04 20 35.67  24.6w 15RF278   568  C~2lVP      
2016 09  05.49854  00 28 40.196  +05 29 11.88  24.6w 15RF278   568  C~2lVP      
2016 09  05.51877  00 28 40.097  +05 29 11.42  24.2w 15RF278   568  C~2lVP      
2016 09  06.45273  00 28 36.405  +05 28 48.78  24.8w 15RF278   568  C~2lVP      
2016 09  06.49401  00 28 36.228  +05 28 47.58  24.9w 15RF278   568  C~2lVP      
2016 09  07.45899  00 28 32.373  +05 28 23.94  24.5w 15RF278   568  C~2lVP      
2016 09  07.50445  00 28 32.171  +05 28 22.75  24.7w 15RF278   568  C~2lVP      
2016 09  26.45157  00 27 11.159  +05 19 52.83  24.4w 15RF278   568  C~2lVP      
2016 09  26.45563  00 27 11.136  +05 19 52.71  24.6w 15RF278   568  C~2lVP      
2016 10  30.34461  00 24 48.001  +05 03 55.87  24.6w 15RF278   568  C~2lVP      
2016 11  03.29848  00 24 33.726  +05 02 15.41  24.2w 15RF278   568  C~2lVP      
2016 11  03.35091  00 24 33.539  +05 02 14.07  24.6w 15RF278   568  C~2lVP      
2016 12  24.26796  00 23 08.472  +04 50 22.65  24.5w 15RF278   568  C~2lVP      
2017 01  02.25760  00 23 16.516  +04 50 41.06  24.8w 15RF278   568  C~2lVP      
2017 01  26.23696  00 24 12.612  +04 55 18.45  24.5w 15RF278   568  C~2lVP      
2017 01  26.24327  00 24 12.630  +04 55 18.78  24.9w 15RF278   568  C~2lVP      
2017 09  15.44018  00 33 02.111  +05 55 39.78  24.7w 15RF278   568  C~2lVP      
2017 09  22.50534  00 32 31.571  +05 52 28.22  24.4w 15RF278   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     0.12       0.00    -0.03
  2   0.0576    164.45     0.10      60.77     0.13
  3   0.0712    114.04    -0.13      74.64     0.02
  4   0.1562   -904.32     0.21     149.31     0.02
  5   0.1584   -945.13     0.03     150.69    -0.03
  6   0.1585   -947.76    -0.06     150.79    -0.04
  7   0.2081  -2011.97    -0.15     177.48     0.02
  8   0.2131  -2131.95    -0.07     179.20     0.01
  9   0.2132  -2135.03    -0.16     179.23    -0.02
 10   0.2133  -2137.70    -0.06     179.24    -0.08
 11   0.2161  -2205.96    -0.03     180.21    -0.05
 12   0.2379  -2752.97     0.07     185.52    -0.10
 13   0.2923  -4179.60    -0.07     183.56     0.05
 14   0.2925  -4183.40    -0.05     183.51     0.01
 15   0.2950  -4248.64     0.09     182.78    -0.05
 16   0.3830  -6275.39     0.06     131.99     0.01
 17   0.4591  -7230.59     0.02      52.06     0.08
 18   0.5249  -7197.74     0.05     -29.78    -0.04
 19   1.2045   2915.04     0.09      89.79     0.00
 20   1.2046   2913.50    -0.14      89.95     0.13
 21   1.2071   2853.90     0.10      90.90     0.11
 22   1.2072   2851.00    -0.10      90.84    -0.02
 23   1.2099   2788.77     0.13      91.82     0.01
 24   1.2100   2785.53    -0.10      91.92     0.03
 25   1.2619   1472.56     0.05     101.00    -0.02
 26   1.2619   1472.19    -0.02     101.02     0.00
 27   1.3547   -870.12     0.11      67.75    -0.07
 28   1.3655  -1105.76     0.03      59.94    -0.03
 29   1.3656  -1108.86     0.03      59.82    -0.07
 30   1.5050  -2558.08    -0.11     -89.68     0.01
 31   1.5296  -2440.39     0.00    -120.45    -0.03
 32   1.5953  -1560.63    -0.04    -197.98    -0.05
 33   1.5953  -1560.25     0.01    -197.78     0.17
 34   2.2310   7136.38     0.04      10.79    -0.07
 35   2.2504   6641.54    -0.05      13.64    -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.

15RF278    quality flag:2

Type:         7:4EEE    7:4EEE  SCATNEAR

axisobj        43.929    43.944    43.915
ecceobj         0.085     0.087     0.084
incobj          2.382     2.382     2.382
qmin           38.985    39.168    38.342
qmax           48.795    48.649    49.544
amean          43.725    43.726    43.710
amin           43.323    43.335    43.297
amax           44.142    44.167    44.176
emean           0.091     0.088     0.096
emin            0.074     0.074     0.073
emax            0.106     0.102     0.123
imean           4.187     4.230     4.237
imin            3.301     3.412     3.263
imax            4.985     4.974     5.110
excite_mean     0.117     0.115     0.121
fracstop        1.000     1.000     1.000
cjmean          3.082     3.082     3.080

libcent 0       180.0     185.6    -180.0
libamp  0       176.1     173.6    -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       182.8     188.2     184.0
kozaiamp        180.0     180.0     180.0