Orbit Fit and Astrometric record for 15RX245

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: 15RX245   
# Created Sat Dec 16 02:38:11 2017
# Orbit generated from Bernstein formalism
# Fitting   33 observations of   33
# Arc:   1.61y
# First observation: 2015/06/23
#  Last observation: 2017/01/30
Preliminary a, adot, b, bdot, g, gdot:
  -0.000024   0.014986   0.000002   0.003189   0.016219   0.000000
# Chi-squared of fit:     5.22 DOF:   60 RMS:  0.07
# Min/Max residuals:    -0.24    0.17
# Exact a, adot, b, bdot, g, gdot:
  1.450079E-05  1.471402E-02  2.849050E-06  3.134713E-03  1.596390E-02 -8.507240E-03
# Covariance matrix:
  2.5245E-13  5.4546E-14 -1.9819E-14  9.4655E-14  2.8730E-13  1.8029E-11
  5.4546E-14  2.8828E-13 -2.0944E-14  1.0003E-13  3.0349E-13  1.9053E-11
 -1.9819E-14 -2.0944E-14  1.1517E-13 -1.1302E-13 -4.2808E-14 -3.5224E-12
  9.4655E-14  1.0003E-13 -1.1302E-13  2.1971E-13  2.0471E-13  1.6926E-11
  2.8730E-13  3.0349E-13 -4.2808E-14  2.0471E-13  5.9055E-13  3.8989E-11
  1.8029E-11  1.9053E-11 -3.5224E-12  1.6926E-11  3.8989E-11  3.2233E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.054658    9.782043    1.006483   -0.000038    0.141118  2457197.098238
# Heliocentric elements and errors
Epoch:              2457190.5000  =  2015/06/17
Mean Anomaly:          357.89931 +/-     0.132
Argument of Peri:       65.42425 +/-     0.146
Long of Asc Node:        8.60558 +/-     0.000
Inclination:            12.16773 +/-     0.001
Eccentricity:         0.89237875 +/-    0.0048
Semi-Major Axis:    421.94552710 +/-   17.6307
Time of Perihelion: 2475663.6790 +/-      16.4
Perihelion:          45.41030484 +/-    2.7654
Aphelion:           798.48074935 +/-   33.4245
Period (y)             8667.4787 +/-    543.25
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           61.75892984 +/-    0.0030
Ecliptic Y            9.62771305 +/-    0.0005
Ecliptic Z            0.05999114 +/-    0.0000
Ecliptic XDOT        -0.00186951 +/-    0.0000
Ecliptic YDOT         0.00223259 +/-    0.0000
Ecliptic ZDOT         0.00053628 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   62.50489479 +/-    0.0029
Geocenter to KBO     62.64131797 +/-    0.0030
# Hcoef:  6.16

The following table shows the complete astrometric record for 15RX245. 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 (15RX245) followed by the observatory code and reference code for the source of the astrometry.

2015 06  23.59746  00 35 52.099  +03 55 31.49  24.5r 15RX245   568  C~2Gu0      
2015 07  14.54187  00 35 59.593  +03 57 01.13  24.4r 15RX245   568  C~2Gu0      
2015 07  19.50673  00 35 57.658  +03 56 58.93  24.6r 15RX245   568  C~2Gu0      
2015 08  11.49525  00 35 31.303  +03 54 56.60  24.5r 15RX245   568  C~2Gu0      
2015 08  11.53687  00 35 31.225  +03 54 56.19  24.3r 15RX245   568  C~2Gu0      
2015 09  08.40090  00 34 27.188  +03 49 02.71  24.1r 15RX245   568  C~2Gu0      
2015 09  08.50503  00 34 26.896  +03 49 00.99  23.9r 15RX245   568  C~2Gu0      
2015 09  08.54864  00 34 26.770  +03 49 00.41  24.4r 15RX245   568  C~2Gu0      
2015 09  09.52420  00 34 24.063  +03 48 44.97  24.3w 15RX245   568  C~2Gu0      
2015 09  16.45310  00 34 04.181  +03 46 51.66  24.7w 15RX245   568  C~2Gu0      
2015 10  03.37987  00 33 12.867  +03 41 56.23  23.5w 15RX245   568  C~2Gu0      
2015 10  07.34557  00 33 00.674  +03 40 45.72  22.2r 15RX245   568  C~2Gu0      
2015 10  07.36748  00 33 00.597  +03 40 45.48  23.2r 15RX245   568  C~2Gu0      
2015 10  07.40358  00 33 00.488  +03 40 45.06  23.8r 15RX245   568  C~2Gu0      
2015 11  07.24449  00 31 33.483  +03 32 26.21  24.5w 15RX245   568  C~2Gu0      
2015 11  07.29726  00 31 33.353  +03 32 25.54  24.3w 15RX245   568  C~2Gu0      
2015 11  10.38064  00 31 26.112  +03 31 44.85  24.4w 15RX245   568  C~2Gu0      
2015 12  07.32092  00 30 41.393  +03 27 47.60  24.0w 15RX245   568  C~2Gu0      
2016 01  01.24995  00 30 36.371  +03 28 00.13  24.2w 15RX245   568  C~2Gu0      
2016 07  07.57912  00 38 51.452  +04 26 58.20        15RX245   568  C~2Gu0      
2016 07  08.55858  00 38 51.583  +04 27 01.13        15RX245   568  C~2Gu0      
2016 09  05.54486  00 37 26.033  +04 20 05.72        15RX245   568  C~2Gu0      
2016 09  07.48422  00 37 20.727  +04 19 35.99        15RX245   568  C~2Gu0      
2016 09  07.53054  00 37 20.597  +04 19 35.30        15RX245   568  C~2Gu0      
2016 09  26.55688  00 36 24.388  +04 14 15.91        15RX245   568  C~2Gu0      
2016 11  03.39726  00 34 32.579  +04 03 33.91        15RX245   568  C~2Gu0      
2016 11  03.46220  00 34 32.394  +04 03 33.01        15RX245   568  C~2Gu0      
2016 12  29.23783  00 33 23.985  +03 57 49.56        15RX245   568  C~2Gu0      
2017 01  03.20730  00 33 26.681  +03 58 14.79        15RX245   568  C~2Gu0      
2017 01  03.25288  00 33 26.705  +03 58 15.13        15RX245   568  C~2Gu0      
2017 01  27.23800  00 34 00.853  +04 02 32.51  23.5w 15RX245   568  C~2Gu0      
2017 01  28.23385  00 34 02.985  +04 02 47.71  24.1w 15RX245   568  C~2Gu0      
2017 01  30.24057  00 34 07.447  +04 03 19.64  24.2w 15RX245   568  C~2Gu0      

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     0.02       0.00     0.05
  2   0.0573    138.35    -0.06      38.37    -0.01
  3   0.0709    110.85    -0.14      47.72     0.17
  4   0.1339   -299.89     0.13      90.21    -0.02
  5   0.1340   -301.12     0.06      90.29    -0.03
  6   0.2103  -1321.30     0.05     142.07     0.05
  7   0.2106  -1326.00     0.04     142.20    -0.04
  8   0.2107  -1327.96     0.04     142.41     0.07
  9   0.2134  -1371.28     0.06     144.15     0.01
 10   0.2323  -1689.46    -0.10     157.03     0.13
 11   0.2787  -2511.90    -0.03     187.69    -0.11
 12   0.2895  -2707.47    -0.03     194.72    -0.24
 13   0.2896  -2708.63    -0.09     194.95    -0.06
 14   0.2897  -2710.29     0.05     195.21     0.12
 15   0.3741  -4104.36    -0.05     249.70    -0.05
 16   0.3743  -4106.42    -0.03     249.85    -0.00
 17   0.3827  -4222.13     0.08     255.17    -0.06
 18   0.4565  -4931.33     0.01     301.06    -0.00
 19   0.5247  -4995.53    -0.01     342.23    -0.05
 20   1.0403   3208.58     0.03     682.29     0.07
 21   1.0430   3211.54    -0.02     684.22    -0.01
 22   1.2045   1871.44    -0.01     803.96    -0.01
 23   1.2098   1786.77    -0.04     807.76     0.01
 24   1.2099   1784.71    -0.02     807.89     0.03
 25   1.2620    885.99     0.03     844.25    -0.06
 26   1.3656   -904.49     0.15     911.35    -0.13
 27   1.3658   -907.38    -0.05     911.61     0.01
 28   1.5185  -1983.65     0.01     998.61     0.04
 29   1.5321  -1936.62     0.06    1005.93     0.01
 30   1.5323  -1936.16     0.01    1006.10     0.10
 31   1.5979  -1365.09    -0.01    1041.64     0.03
 32   1.6006  -1329.78    -0.08    1043.06    -0.04
 33   1.6061  -1255.84    -0.06    1046.15     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.

15RX245    quality flag:1

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj       467.072   539.819   412.540
ecceobj         0.902     0.916     0.888
incobj         12.098    12.098    12.099
qmin           41.264    40.329    41.975
qmax          913.911  1037.106   801.304
amean         425.237   480.790   382.280
amin          392.913   444.229   359.956
amax          479.716   541.160   423.587
emean           0.893     0.906     0.880
emin            0.881     0.893     0.869
emax            0.905     0.917     0.892
imean          12.447    12.449    12.436
imin           12.256    12.236    12.260
imax           12.722    12.757    12.704
excite_mean     0.918     0.931     0.906
fracstop        1.000     1.000     1.000
cjmean          3.376     3.368     3.385

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        71.7      71.5      73.0
kozaiamp          9.1       8.9      10.7