Orbit Fit and Astrometric record for 15RG281

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: 15RG281   
# Created Thu Feb 21 02:10:23 2019
# Orbit generated from Bernstein formalism
# Fitting   27 observations of   27
# Arc:   2.42y
# First observation: 2015/06/23
#  Last observation: 2017/11/22
Preliminary a, adot, b, bdot, g, gdot:
  -0.000062   0.030373  -0.000011   0.004157   0.027231   0.000000
# Chi-squared of fit:     3.65 DOF:   48 RMS:  0.06
# Min/Max residuals:    -0.16    0.22
# Exact a, adot, b, bdot, g, gdot:
  1.782908E-05  2.942303E-02  2.272213E-06  4.022301E-03  2.660582E-02 -2.717968E-03
# Covariance matrix:
  1.9551E-13  2.5099E-15 -9.2699E-15  1.1820E-14  1.3677E-13  1.1412E-12
  2.5099E-15  5.8402E-13 -4.5580E-14  1.1619E-13  3.6595E-13  1.0860E-11
 -9.2699E-15 -4.5580E-14  1.1794E-13 -8.3308E-14 -3.6221E-14 -9.7648E-13
  1.1820E-14  1.1619E-13 -8.3308E-14  1.1331E-13  7.8676E-14  2.5733E-12
  1.3677E-13  3.6595E-13 -3.6221E-14  7.8676E-14  3.6290E-13  7.3957E-12
  1.1412E-12  1.0860E-11 -9.7648E-13  2.5733E-12  7.3957E-12  2.4025E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    3.106851   11.807019    1.000891   -0.009466    0.176201  2457197.106478
# Heliocentric elements and errors
Epoch:              2457190.5000  =  2015/06/17
Mean Anomaly:          334.67408 +/-     0.072
Argument of Peri:       61.06833 +/-     0.128
Long of Asc Node:      348.87791 +/-     0.002
Inclination:             8.50032 +/-     0.001
Eccentricity:         0.22026233 +/-    0.0004
Semi-Major Axis:     46.01584542 +/-    0.0084
Time of Perihelion: 2465211.3856 +/-      22.9
Perihelion:          35.88028795 +/-    0.0183
Aphelion:            56.15140289 +/-    0.0200
Period (y)              312.1543 +/-      0.09
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           36.76498655 +/-    0.0008
Ecliptic Y            6.66402576 +/-    0.0002
Ecliptic Z            2.03722075 +/-    0.0001
Ecliptic XDOT        -0.00091732 +/-    0.0000
Ecliptic YDOT         0.00289572 +/-    0.0000
Ecliptic ZDOT         0.00039821 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.41956365 +/-    0.0008
Geocenter to KBO     37.58576550 +/-    0.0009
# Hcoef:  8.48

The following table shows the complete astrometric record for 15RG281. 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 (15RG281) followed by the observatory code and reference code for the source of the astrometry.

2015 06  23.60570  00 38 31.950  +07 31 38.12  24.2r 15RG281   568  C~2nvt      
2015 07  19.53303  00 38 48.153  +07 36 48.10  24.2r 15RG281   568  C~2nvt      
2015 08  20.43842  00 37 42.542  +07 33 47.88  24.1r 15RG281   568  C~2nvt      
2015 08  20.48764  00 37 42.364  +07 33 47.16  24.3r 15RG281   568  C~2nvt      
2015 09  07.57672  00 36 31.225  +07 28 01.96  24.5w 15RG281   568  C~2nvt      
2015 09  09.40442  00 36 23.063  +07 27 19.21  24.1r 15RG281   568  C~2nvt      
2015 09  09.44553  00 36 22.869  +07 27 18.24  24.3r 15RG281   568  C~2nvt      
2015 09  09.48644  00 36 22.689  +07 27 17.28  24.1r 15RG281   568  C~2nvt      
2015 09  10.51074  00 36 18.037  +07 26 52.70  24.0w 15RG281   568  C~2nvt      
2015 09  18.47260  00 35 40.605  +07 23 30.51  24.3w 15RG281   568  C~2nvt      
2015 10  08.36042  00 34 01.668  +07 14 01.89  24.3w 15RG281   568  C~2nvt      
2015 10  09.33000  00 33 56.824  +07 13 32.87  24.3w 15RG281   568  C~2nvt      
2015 11  10.45634  00 31 32.870  +06 58 23.89  24.1w 15RG281   568  C~2nvt      
2015 12  08.25463  00 30 21.852  +06 49 48.72  24.3w 15RG281   568  C~2nvt      
2016 01  01.31705  00 30 19.858  +06 48 16.86  24.5w 15RG281   568  C~2nvt      
2016 01  02.26815  00 30 21.021  +06 48 20.97  24.3w 15RG281   568  C~2nvt      
2016 09  05.57499  00 42 41.202  +08 22 32.00        15RG281   568  C~2nvt      
2016 09  06.52410  00 42 37.093  +08 22 11.35        15RG281   568  C~2nvt      
2016 09  06.56619  00 42 36.898  +08 22 10.39        15RG281   568  C~2nvt      
2016 09  27.47990  00 40 57.473  +08 13 15.52  24.0w 15RG281   568  C~2nvt      
2016 12  29.25523  00 36 11.446  +07 41 12.87  24.1w 15RG281   568  C~2nvt      
2017 01  03.22553  00 36 16.512  +07 41 25.84  24.6w 15RG281   568  C~2nvt      
2017 01  27.27188  00 37 16.214  +07 46 18.49  23.7w 15RG281   568  C~2nvt      
2017 09  16.50002  00 48 01.548  +09 12 29.01  24.3w 15RG281   568  C~2nvt      
2017 09  17.39915  00 47 57.279  +09 12 06.60  24.2w 15RG281   568  C~2nvt      
2017 09  22.45345  00 47 32.784  +09 09 55.72  24.3w 15RG281   568  C~2nvt      
2017 11  22.33845  00 42 57.232  +08 41 40.76  24.5w 15RG281   568  C~2nvt      

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    -0.07       0.00     0.02
  2   0.0710    343.30     0.11     190.48    -0.03
  3   0.1583   -624.61     0.06     408.03    -0.04
  4   0.1585   -627.33    -0.05     408.41     0.01
  5   0.2080  -1735.78     0.09     507.35     0.04
  6   0.2130  -1864.21    -0.04     515.87     0.02
  7   0.2131  -1867.24    -0.11     516.11     0.05
  8   0.2132  -1870.08     0.01     516.28     0.01
  9   0.2160  -1943.37    -0.08     520.95    -0.06
 10   0.2378  -2534.84     0.05     554.54     0.00
 11   0.2923  -4112.18    -0.01     613.04     0.07
 12   0.2949  -4189.89    -0.05     614.86     0.01
 13   0.3829  -6519.04     0.22     628.05    -0.08
 14   0.4590  -7695.58    -0.01     574.52     0.03
 15   0.5249  -7759.38    -0.16     501.94    -0.03
 16   0.5275  -7741.82     0.04     498.84    -0.10
 17   1.2046   4603.83    -0.04    1360.15     0.01
 18   1.2072   4539.59     0.07    1364.94     0.03
 19   1.2073   4536.55    -0.04    1365.19     0.04
 20   1.2645   2968.57    -0.00    1449.76    -0.02
 21   1.5185  -1694.58     0.11    1350.21    -0.01
 22   1.5322  -1620.24    -0.06    1332.46     0.06
 23   1.5980   -689.25    -0.05    1252.10     0.04
 24   2.2338  10151.96    -0.00    2276.40     0.00
 25   2.2363  10084.84    -0.08    2280.20     0.05
 26   2.2501   9698.84     0.09    2299.96    -0.11
 27   2.4168   5271.67     0.00    2325.39    -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.

15RG281    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        46.558    46.573    46.542
ecceobj         0.227     0.228     0.227
incobj          8.465     8.465     8.465
qmin           35.051    35.259    34.923
qmax           57.969    57.676    57.974
amean          46.183    46.195    46.189
amin           45.738    45.769    45.724
amax           46.713    46.744    46.708
emean           0.222     0.222     0.224
emin            0.205     0.207     0.208
emax            0.241     0.235     0.242
imean           9.142     8.995     9.018
imin            8.224     8.108     7.921
imax           10.328     9.858    10.044
excite_mean     0.273     0.271     0.273
fracstop        1.000     1.000     1.000
cjmean          3.036     3.037     3.036

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       176.9     178.2     178.6
kozaiamp        180.0     179.9     180.0