Orbit Fit and Astrometric record for 15RD277

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: 15RD277   
# Created Thu Apr 18 01:10:34 2019
# Orbit generated from Bernstein formalism
# Fitting   33 observations of   33
# Arc:   2.35y
# First observation: 2015/07/19
#  Last observation: 2017/11/22
Preliminary a, adot, b, bdot, g, gdot:
   0.000347   0.088708   0.000064   0.029885   0.057077   0.000000
# Chi-squared of fit:     6.58 DOF:   60 RMS:  0.08
# Min/Max residuals:    -0.33    0.30
# Exact a, adot, b, bdot, g, gdot:
  2.475723E-05  8.609990E-02  8.646561E-06  2.947051E-02  5.502922E-02  6.552271E-03
# Covariance matrix:
  2.1824E-13  2.5182E-14 -6.5732E-15  2.6254E-14  1.6580E-13  4.5596E-13
  2.5182E-14  5.2856E-13 -4.9688E-14  2.1312E-13  2.5312E-13  3.5098E-12
 -6.5732E-15 -4.9688E-14  9.2456E-14 -8.6926E-14 -2.5194E-14 -4.0277E-13
  2.6254E-14  2.1312E-13 -8.6926E-14  1.9325E-13  1.0610E-13  1.7317E-12
  1.6580E-13  2.5312E-13 -2.5194E-14  1.0610E-13  2.6230E-13  1.7712E-12
  4.5596E-13  3.5098E-12 -4.0277E-13  1.7317E-12  1.7712E-12  2.8468E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.001382    8.651167    0.968609    0.000108   -0.311779  2457223.003419
# Heliocentric elements and errors
Epoch:              2457220.5000  =  2015/07/17
Mean Anomaly:            2.96559 +/-     0.008
Argument of Peri:      354.39847 +/-     0.015
Long of Asc Node:        5.64706 +/-     0.000
Inclination:            18.87493 +/-     0.000
Eccentricity:         0.28616468 +/-    0.0000
Semi-Major Axis:     25.89685232 +/-    0.0011
Time of Perihelion: 2456823.9681 +/-       1.0
Perihelion:          18.48608774 +/-    0.0011
Aphelion:            33.30761690 +/-    0.0016
Period (y)              131.7889 +/-      0.01
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           18.41579595 +/-    0.0002
Ecliptic Y            1.82286333 +/-    0.0000
Ecliptic Z            0.00064849 +/-    0.0000
Ecliptic XDOT        -0.00032434 +/-    0.0000
Ecliptic YDOT         0.00427770 +/-    0.0000
Ecliptic ZDOT         0.00146631 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   18.50579292 +/-    0.0002
Geocenter to KBO     18.17216231 +/-    0.0002
# Hcoef: 10.74

The following table shows the complete astrometric record for 15RD277. 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 (15RD277) followed by the observatory code and reference code for the source of the astrometry.

2015 07  19.50263  00 31 47.104  +03 25 53.38  23.6r 15RD277   568  C~2ji9      
2015 08  11.48475  00 30 33.324  +03 25 03.89  23.5r 15RD277   568  C~2ji9      
2015 08  11.52861  00 30 33.091  +03 25 03.29  23.5r 15RD277   568  C~2ji9      
2015 09  08.38448  00 27 12.179  +03 12 19.46  23.2r 15RD277   568  C~2ji9      
2015 09  08.48868  00 27 11.235  +03 12 15.58  23.3r 15RD277   568  C~2ji9      
2015 09  08.53090  00 27 10.856  +03 12 14.00  23.3r 15RD277   568  C~2ji9      
2015 09  09.50777  00 27 02.196  +03 11 36.78  23.5w 15RD277   568  C~2ji9      
2015 09  10.44878  00 26 53.788  +03 11 00.49  23.5w 15RD277   568  C~2ji9      
2015 09  16.43207  00 25 58.741  +03 06 59.83  23.4w 15RD277   568  C~2ji9      
2015 10  03.35878  00 23 15.304  +02 54 45.23  23.1w 15RD277   568  C~2ji9      
2015 10  07.32768  00 22 36.815  +02 51 50.68  23.1r 15RD277   568  C~2ji9      
2015 10  07.37988  00 22 36.310  +02 51 48.48  23.0r 15RD277   568  C~2ji9      
2015 10  07.38724  00 22 36.224  +02 51 48.08  23.2r 15RD277   568  C~2ji9      
2015 11  05.24319  00 18 26.563  +02 33 33.91  23.5w 15RD277   568  C~2ji9      
2015 11  07.21299  00 18 12.785  +02 32 38.79  23.6w 15RD277   568  C~2ji9      
2015 11  07.26547  00 18 12.413  +02 32 37.41  23.7w 15RD277   568  C~2ji9      
2015 11  08.31016  00 18 05.329  +02 32 09.50  23.5w 15RD277   568  C~2ji9      
2015 11  08.37107  00 18 04.897  +02 32 08.11  23.3w 15RD277   568  C~2ji9      
2015 11  10.33047  00 17 52.076  +02 31 18.80  24.3w 15RD277   568  C~2ji9      
2015 11  10.34251  00 17 52.010  +02 31 18.44  23.6w 15RD277   568  C~2ji9      
2016 09  05.50664  00 43 31.605  +06 48 53.34  23.6w 15RD277   568  C~2ji9      
2016 09  06.46082  00 43 23.696  +06 48 24.14  23.5w 15RD277   568  C~2ji9      
2016 09  06.50211  00 43 23.344  +06 48 22.84  23.4w 15RD277   568  C~2ji9      
2016 10  26.40787  00 35 35.540  +06 14 25.71  23.4r 15RD277   568  C~2ji9      
2016 10  26.47363  00 35 34.957  +06 14 23.04  23.2r 15RD277   568  C~2ji9      
2016 11  03.40304  00 34 29.034  +06 09 17.68        15RD277   568  C~2ji9      
2016 11  03.46810  00 34 28.544  +06 09 15.22  23.5w 15RD277   568  C~2ji9      
2016 12  25.25214  00 31 25.442  +05 59 09.85  23.7w 15RD277   568  C~2ji9      
2017 01  02.29442  00 31 44.259  +06 02 21.24  23.6w 15RD277   568  C~2ji9      
2017 01  30.23419  00 34 27.710  +06 23 54.96  23.7w 15RD277   568  C~2ji9      
2017 09  16.49073  00 58 05.983  +10 14 41.46  23.1w 15RD277   568  C~2ji9      
2017 09  22.43860  00 57 11.457  +10 11 19.87  23.4w 15RD277   568  C~2ji9      
2017 11  22.33458  00 48 15.982  +09 30 25.10  23.6w 15RD277   568  C~2ji9      

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    -0.00       0.00    -0.04
  2   0.0629  -1034.83    -0.04     389.90     0.00
  3   0.0630  -1038.27     0.05     390.72     0.02
  4   0.1393  -4104.72    -0.02     876.33    -0.01
  5   0.1396  -4119.24    -0.08     878.35     0.06
  6   0.1397  -4125.09    -0.04     879.15     0.07
  7   0.1424  -4258.99    -0.02     896.20     0.01
  8   0.1450  -4389.07     0.02     912.62    -0.00
  9   0.1613  -5242.00    -0.03    1017.44    -0.03
 10   0.2077  -7783.70    -0.04    1311.57    -0.04
 11   0.2185  -8383.23     0.04    1379.70    -0.05
 12   0.2187  -8391.06     0.19    1380.68    -0.03
 13   0.2187  -8392.41    -0.03    1380.82    -0.02
 14   0.2977 -12270.45    -0.01    1860.40    -0.04
 15   0.3031 -12482.62     0.07    1891.84    -0.10
 16   0.3033 -12488.31     0.04    1892.79    -0.04
 17   0.3061 -12597.23     0.05    1909.36    -0.18
 18   0.3063 -12603.75    -0.04    1910.65     0.08
 19   0.3116 -12800.43    -0.12    1941.75     0.14
 20   0.3117 -12801.49     0.04    1941.82     0.00
 21   1.1335  14486.09     0.05    7092.88     0.02
 22   1.1361  14365.59     0.01    7111.83     0.00
 23   1.1362  14360.23     0.01    7112.67    -0.03
 24   1.2728   7123.06     0.02    7961.17     0.04
 25   1.2730   7114.00     0.05    7962.12     0.04
 26   1.2947   6088.25    -0.33    8067.10     0.30
 27   1.2949   6080.55     0.06    8067.71     0.03
 28   1.4367   3328.11     0.02    8585.81    -0.01
 29   1.4587   3661.93    -0.04    8651.35     0.04
 30   1.5352   6416.00     0.08    8883.49    -0.10
 31   2.1629  31471.40    -0.02   13587.47    -0.06
 32   2.1792  30630.67     0.04   13706.03    -0.06
 33   2.3459  22228.96     0.02   14453.74    -0.03

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.

15RD277    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        25.986    25.996    25.976
ecceobj         0.290     0.290     0.289
incobj         18.838    18.838    18.838
qmin           18.048    18.256    18.032
qmax           34.991    34.668    34.086
amean          25.996    26.126    25.755
amin           25.623    25.682    25.341
amax           26.896    26.600    26.312
emean           0.290     0.292     0.288
emin            0.266     0.277     0.272
emax            0.305     0.303     0.300
imean          19.475    19.185    19.661
imin           18.993    18.900    19.065
imax           20.087    19.603    20.317
excite_mean     0.442     0.439     0.443
fracstop        0.008     0.006     0.010
cjmean          2.829     2.829     2.831

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       104.5     288.1     110.1
kozaiamp        179.7     179.9     179.6