Orbit Fit and Astrometric record for 15RF280

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: 15RF280   
# Created Thu Feb 21 02:10:22 2019
# Orbit generated from Bernstein formalism
# Fitting   31 observations of   31
# Arc:   2.50y
# First observation: 2015/06/23
#  Last observation: 2017/12/23
Preliminary a, adot, b, bdot, g, gdot:
  -0.000061   0.025483   0.000004   0.009348   0.025886   0.000000
# Chi-squared of fit:    11.50 DOF:   56 RMS:  0.11
# Min/Max residuals:    -0.28    0.22
# Exact a, adot, b, bdot, g, gdot:
  1.445276E-05  2.484159E-02  6.740615E-06  9.147630E-03  2.534678E-02  9.768306E-04
# Covariance matrix:
  1.9087E-13  4.3657E-14 -1.1401E-14  4.2418E-14  1.6575E-13  2.0295E-12
  4.3657E-14  3.9848E-13 -4.8251E-14  1.8565E-13  3.1004E-13  8.7193E-12
 -1.1401E-14 -4.8251E-14  1.0203E-13 -8.7323E-14 -4.1649E-14 -1.3245E-12
  4.2418E-14  1.8565E-13 -8.7323E-14  1.7974E-13  1.5869E-13  5.1119E-12
  1.6575E-13  3.1004E-13 -4.1649E-14  1.5869E-13  3.6678E-13  7.4934E-12
  2.0295E-12  8.7193E-12 -1.3245E-12  5.1119E-12  7.4934E-12  2.3968E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.114315   11.581910    1.001600   -0.000246    0.172384  2457197.114678
# Heliocentric elements and errors
Epoch:              2457190.5000  =  2015/06/17
Mean Anomaly:            7.35412 +/-     0.357
Argument of Peri:      351.57995 +/-     0.425
Long of Asc Node:        9.81028 +/-     0.000
Inclination:            20.24721 +/-     0.001
Eccentricity:         0.08383545 +/-    0.0001
Semi-Major Axis:     42.84637171 +/-    0.0028
Time of Perihelion: 2455097.8452 +/-     101.6
Perihelion:          39.25432707 +/-    0.0059
Aphelion:            46.43841636 +/-    0.0061
Period (y)              280.4654 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           38.67804084 +/-    0.0009
Ecliptic Y            6.90544694 +/-    0.0002
Ecliptic Z            0.07903470 +/-    0.0000
Ecliptic XDOT        -0.00043975 +/-    0.0000
Ecliptic YDOT         0.00264320 +/-    0.0000
Ecliptic ZDOT         0.00098836 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.28972242 +/-    0.0009
Geocenter to KBO     39.45273796 +/-    0.0009
# Hcoef:  8.93

The following table shows the complete astrometric record for 15RF280. 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 (15RF280) followed by the observatory code and reference code for the source of the astrometry.

2015 06  23.61390  00 42 24.998  +04 41 08.89  25.4r 15RF280   568  C~2nvp      
2015 07  14.57141  00 42 40.244  +04 44 48.53  25.0r 15RF280   568  C~2nvp      
2015 07  19.54942  00 42 37.949  +04 45 03.56  24.8r 15RF280   568  C~2nvp      
2015 08  11.50339  00 41 59.066  +04 43 13.56  24.7r 15RF280   568  C~2nvp      
2015 08  11.54506  00 41 58.932  +04 43 13.02  25.6r 15RF280   568  C~2nvp      
2015 09  08.40906  00 40 18.862  +04 35 23.14  24.4r 15RF280   568  C~2nvp      
2015 09  08.51318  00 40 18.399  +04 35 20.87  24.6r 15RF280   568  C~2nvp      
2015 09  08.55681  00 40 18.203  +04 35 19.93  24.7r 15RF280   568  C~2nvp      
2015 09  09.53240  00 40 13.911  +04 34 58.39  24.7w 15RF280   568  C~2nvp      
2015 09  10.47324  00 40 09.733  +04 34 37.37  25.1w 15RF280   568  C~2nvp      
2015 09  16.46364  00 39 42.335  +04 32 18.11  24.9w 15RF280   568  C~2nvp      
2015 10  03.39174  00 38 20.212  +04 25 14.20  25.2w 15RF280   568  C~2nvp      
2015 10  07.35864  00 38 00.587  +04 23 31.70  24.7r 15RF280   568  C~2nvp      
2015 10  07.41176  00 38 00.309  +04 23 30.50  25.1r 15RF280   568  C~2nvp      
2015 11  07.25497  00 35 39.554  +04 11 24.25  25.0w 15RF280   568  C~2nvp      
2015 11  07.30781  00 35 39.341  +04 11 23.25  24.9w 15RF280   568  C~2nvp      
2015 11  10.39374  00 35 27.534  +04 10 24.23  24.7w 15RF280   568  C~2nvp      
2015 12  07.33142  00 34 14.042  +04 04 56.12  25.0w 15RF280   568  C~2nvp      
2016 01  01.26036  00 34 03.855  +04 05 56.43  25.2w 15RF280   568  C~2nvp      
2016 09  26.55282  00 43 23.694  +05 31 58.73  24.6w 15RF280   568  C~2nvp      
2016 11  02.39575  00 40 28.307  +05 16 47.71  24.6r 15RF280   568  C~2nvp      
2016 11  02.46170  00 40 28.010  +05 16 46.73  24.5r 15RF280   568  C~2nvp      
2016 11  04.30057  00 40 20.370  +05 16 07.07  24.4w 15RF280   568  C~2nvp      
2016 11  04.35961  00 40 20.115  +05 16 05.76  24.9w 15RF280   568  C~2nvp      
2016 12  29.28720  00 38 28.519  +05 08 17.98  24.8w 15RF280   568  C~2nvp      
2017 01  02.32226  00 38 31.234  +05 08 51.39  24.8w 15RF280   568  C~2nvp      
2017 09  15.43089  00 48 52.012  +06 40 23.92  24.9w 15RF280   568  C~2nvp      
2017 09  16.51398  00 48 46.999  +06 39 59.61  25.1w 15RF280   568  C~2nvp      
2017 09  22.46739  00 48 18.867  +06 37 40.66  24.9w 15RF280   568  C~2nvp      
2017 09  22.49605  00 48 18.725  +06 37 40.04  24.9w 15RF280   568  C~2nvp      
2017 12  23.28322  00 42 55.264  +06 10 32.35  24.9w 15RF280   568  C~2nvp      

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     0.22       0.00    -0.21
  2   0.0574    295.64    -0.05     113.06    -0.14
  3   0.0710    269.94     0.19     140.30    -0.01
  4   0.1339   -308.05     0.10     266.34     0.06
  5   0.1340   -310.10    -0.21     266.63     0.09
  6   0.2103  -1870.81    -0.07     419.82     0.04
  7   0.2105  -1878.07    -0.04     420.44     0.04
  8   0.2107  -1881.13    -0.04     420.72     0.06
  9   0.2133  -1948.62    -0.02     426.04     0.05
 10   0.2159  -2014.34    -0.06     431.17     0.06
 11   0.2323  -2445.87    -0.07     463.56    -0.23
 12   0.2787  -3742.13     0.15     555.12     0.15
 13   0.2895  -4052.43    -0.08     576.00    -0.06
 14   0.2897  -4056.73    -0.17     576.53     0.16
 15   0.3741  -6279.62     0.03     735.65     0.04
 16   0.3742  -6282.95     0.02     735.98     0.08
 17   0.3827  -6468.74    -0.01     751.17    -0.22
 18   0.4564  -7610.04     0.03     882.12     0.09
 19   0.5247  -7726.60     0.08     997.64     0.11
 20   1.2620   1999.27    -0.04    2464.76    -0.07
 21   1.3629   -767.78    -0.05    2650.78    -0.28
 22   1.3630   -772.24    -0.06    2651.61     0.22
 23   1.3681   -892.79     0.05    2659.82     0.05
 24   1.3682   -896.81    -0.07    2660.11     0.04
 25   1.5186  -2614.09     0.02    2883.45    -0.02
 26   1.5297  -2563.66     0.15    2898.26    -0.19
 27   2.2308   8113.80     0.03    4340.49    -0.03
 28   2.2338   8035.40    -0.04    4347.07     0.05
 29   2.2501   7594.48     0.04    4381.76    -0.03
 30   2.2502   7592.29     0.04    4382.02     0.05
 31   2.5015   2513.09    -0.05    4761.14     0.05

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.

15RF280    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        43.267    43.278    43.256
ecceobj         0.093     0.093     0.093
incobj         20.155    20.156    20.155
qmin           38.426    38.385    38.431
qmax           47.929    47.937    47.845
amean          43.033    43.043    43.021
amin           42.696    42.704    42.685
amax           43.398    43.399    43.388
emean           0.091     0.091     0.090
emin            0.079     0.079     0.078
emax            0.104     0.105     0.103
imean          20.118    20.118    20.117
imin           19.690    19.685    19.690
imax           20.570    20.572    20.565
excite_mean     0.356     0.356     0.356
fracstop        1.000     1.000     1.000
cjmean          2.936     2.936     2.936

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       180.7     180.8     180.7
kozaiamp        180.0     180.0     180.0