Orbit Fit and Astrometric record for 15RA279

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: 15RA279   
# Created Thu Apr 18 01:10:35 2019
# Orbit generated from Bernstein formalism
# Fitting   34 observations of   35
# Arc:   2.25y
# First observation: 2015/06/23
#  Last observation: 2017/09/22
Preliminary a, adot, b, bdot, g, gdot:
  -0.000038   0.012009   0.000049  -0.006965   0.019774   0.000000
# Chi-squared of fit:    10.30 DOF:   62 RMS:  0.10
# Min/Max residuals:    -0.27    0.26
# Exact a, adot, b, bdot, g, gdot:
  8.940087E-06  1.167592E-02 -5.222614E-06 -6.676296E-03  1.934278E-02 -1.207337E-02
# Covariance matrix:
  1.7706E-13 -3.1665E-14  1.2927E-14 -5.0147E-14  1.4279E-13  3.7425E-12
 -3.1665E-14  1.4622E-13  1.7595E-14 -6.7745E-14  1.0392E-13  5.0149E-12
  1.2927E-14  1.7595E-14  1.0500E-13 -1.0749E-13  3.7527E-14  2.3205E-12
 -5.0147E-14 -6.7745E-14 -1.0749E-13  2.2446E-13 -1.4486E-13 -8.9175E-12
  1.4279E-13  1.0392E-13  3.7527E-14 -1.4486E-13  2.8875E-13  1.0754E-11
  3.7425E-12  5.0149E-12  2.3205E-12 -8.9175E-12  1.0754E-11  6.5878E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.189892   10.441449    1.004792   -0.000409    0.152691  2457197.098238
# Heliocentric elements and errors
Epoch:              2457190.5000  =  2015/06/17
Mean Anomaly:          320.31836 +/-     0.162
Argument of Peri:      304.16100 +/-     0.054
Long of Asc Node:      189.65045 +/-     0.000
Inclination:            30.35399 +/-     0.001
Eccentricity:         0.68968288 +/-    0.0010
Semi-Major Axis:     59.87542549 +/-    0.1551
Time of Perihelion: 2475843.9199 +/-      22.8
Perihelion:          18.58036951 +/-    0.0766
Aphelion:           101.17048147 +/-    0.2687
Period (y)              463.3201 +/-      1.80
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           50.87093014 +/-    0.0014
Ecliptic Y            8.35384362 +/-    0.0002
Ecliptic Z            0.17112712 +/-    0.0000
Ecliptic XDOT        -0.00197950 +/-    0.0000
Ecliptic YDOT         0.00130991 +/-    0.0000
Ecliptic ZDOT        -0.00095058 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   51.55257046 +/-    0.0014
Geocenter to KBO     51.69886897 +/-    0.0014
# Hcoef:  7.67

The following table shows the complete astrometric record for 15RA279. 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 (15RA279) followed by the observatory code and reference code for the source of the astrometry.

2015 06  23.59746  00 38 05.250  +04 18 31.24  24.9r 15RA279   568  C~2lVS      
2015 07  14.54188  00 38 14.021  +04 18 05.81  25.0r 15RA279   568  C~2lVS      
2015 07  19.50673  00 38 11.607  +04 17 30.92  25.0r 15RA279   568  C~2lVS      
2015 08  11.49525  00 37 39.064  +04 12 31.89  24.5r 15RA279   568  C~2lVS      
2015 08  11.53687  00 37 38.989  +04 12 31.01  25.8r 15RA279   568  C~2lVS      
2015 09  08.40090  00 36 20.032  +04 02 12.77  24.7r 15RA279   568  C~2lVS      
2015 09  08.50503  00 36 19.678  +04 02 10.43  24.3r 15RA279   568  C~2lVS      
2015 09  08.54864  00 36 19.523  +04 02 09.10  24.1r 15RA279   568  C~2lVS      
2015 09  09.52420  00 36 16.188  +04 01 43.77  24.9w 15RA279   568  C~2lVS      
2015 09  10.46510  00 36 12.943  +04 01 19.07  24.8w 15RA279   568  C~2lVS      
2015 09  16.45310  00 35 51.647  +03 58 38.15  25.0w 15RA279   568  C~2lVS      
2015 10  03.37987  00 34 48.167  +03 50 41.00  24.5w 15RA279   568  C~2lVS      
2015 10  07.34557  00 34 33.041  +03 48 47.34  24.6r 15RA279   568  C~2lVS      
2015 10  07.36748  00 34 32.966  +03 48 46.72  24.3r 15RA279   568  C~2lVS      
2015 10  07.40358  00 34 32.812  +03 48 45.82  24.7r 15RA279   568  C~2lVS      
2015 11  07.24449  00 32 44.629  +03 35 01.35  24.8w 15RA279   568  C~2lVS      
2015 11  07.29726  00 32 44.466  +03 35 00.20  24.9w 15RA279   568  C~2lVS      
2015 11  10.38064  00 32 35.398  +03 33 49.28  25.4w 15RA279   568  C~2lVS      
2015 12  07.32092  00 31 38.839  +03 25 51.99  24.5w 15RA279   568  C~2lVS      
2016 01  01.24995  00 31 30.703  +03 23 15.64  25.6w 15RA279   568  C~2lVS      
2016 07  07.57912  00 41 21.648  +04 13 01.43  25.2w 15RA279   568  C~2lVS      
2016 07  08.55858  00 41 21.825  +04 12 57.98  24.8w 15RA279   568  C~2lVS      
2016 09  05.53271  00 39 36.249  +03 57 19.36  23.1w 15RA279   568  C~2lVS      
2016 09  05.54486  00 39 36.177  +03 57 18.44  24.7w 15RA279   568  C~2lVS      
2016 09  07.47209  00 39 29.666  +03 56 28.25  24.9w 15RA279   568  C~2lVS      
2016 09  07.48422  00 39 29.619  +03 56 27.99  24.8w 15RA279   568  C~2lVS      
2016 09  07.51840  00 39 29.501  +03 56 27.06  24.7w 15RA279   568  C~2lVS      
2016 09  07.53054  00 39 29.447  +03 56 26.74  25.0w 15RA279   568  C~2lVS      
2016 09  26.57954  00 38 19.739  +03 47 37.78  24.8w 15RA279   568  C~2lVS      
2016 11  03.40883  00 36 00.498  +03 30 08.47  24.7w 15RA279   568  C~2lVS      
2016 11  03.47388  00 36 00.285  +03 30 06.94  24.7w 15RA279   568  C~2lVS      
2016 12  29.25118  00 34 32.105  +03 17 06.29  23.8w 15RA279   568  C~2lVT      
2017 01  03.22129  00 34 34.977  +03 17 06.04  25.3w 15RA279   568  C~2lVT      
2017 09  15.44947  00 42 16.113  +03 46 55.74  24.7w 15RA279   568  C~2lVT      
2017 09  22.51463  00 41 49.695  +03 43 34.69  25.0w 15RA279   568  C~2lVT      

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    -0.05
  2   0.0573    110.70    -0.10     -74.86    -0.04
  3   0.0709     63.80    -0.06     -92.79    -0.04
  4   0.1339   -501.29    -0.01    -176.84     0.07
  5   0.1340   -502.67     0.16    -177.21    -0.16
  6   0.2103  -1831.88    -0.27    -282.01    -0.18
  7   0.2106  -1837.67    -0.02    -282.09     0.10
  8   0.2107  -1840.33    -0.14    -282.40    -0.06
  9   0.2134  -1896.17     0.03    -286.09    -0.03
 10   0.2159  -1950.53     0.12    -289.73    -0.06
 11   0.2323  -2306.83    -0.00    -312.51     0.06
 12   0.2787  -3368.11     0.16    -377.84     0.10
 13   0.2895  -3621.03    -0.11    -393.32     0.03
 14   0.2896  -3622.30     0.03    -393.45    -0.02
 15   0.2897  -3624.78    -0.12    -393.37     0.18
 16   0.3741  -5438.83    -0.02    -514.10    -0.10
 17   0.3743  -5441.52     0.00    -514.19    -0.01
 18   0.3827  -5594.35     0.09    -525.93     0.26
 19   0.4565  -6561.55     0.08    -631.13    -0.07
 20   0.5247  -6735.31    -0.03    -726.89     0.03
 21   1.0403   2573.88    -0.08   -1454.60     0.07
 22   1.0430   2574.97     0.26   -1458.82    -0.07
 23   1.2045    753.77 (   0.62)  -1703.88 (   0.36)
 24   1.2045    752.42    -0.03   -1704.30    -0.02
 25   1.2098    643.11     0.05   -1712.29    -0.05
 26   1.2098    642.36     0.01   -1712.26     0.03
 27   1.2099    640.37     0.01   -1712.42    -0.01
 28   1.2099    639.50    -0.15   -1712.40     0.06
 29   1.2621   -527.64     0.09   -1790.00    -0.07
 30   1.3657  -2856.90    -0.02   -1936.95     0.07
 31   1.3658  -2860.44     0.01   -1937.11     0.14
 32   1.5186  -4381.95    -0.07   -2136.13    -0.00
 33   1.5322  -4342.49     0.08   -2153.27    -0.11
 34   2.2309   2711.55    -0.09   -3214.73     0.01
 35   2.2503   2268.88     0.02   -3245.05    -0.06

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.

15RA279    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        60.385    60.837    59.942
ecceobj         0.688     0.691     0.685
incobj         30.118    30.119    30.118
qmin           16.729    17.910    17.732
qmax          105.901   106.165   108.063
amean          59.768    60.612    59.780
amin           58.060    59.685    58.080
amax           61.462    62.299    63.082
emean           0.702     0.696     0.692
emin            0.683     0.685     0.681
emax            0.723     0.706     0.716
imean          28.124    29.414    29.381
imin           25.992    28.818    28.298
imax           30.174    30.155    30.171
excite_mean     0.845     0.852     0.849
fracstop        0.085     0.040     0.042
cjmean          2.280     2.282     2.286

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       320.2     313.9     315.4
kozaiamp         17.9      10.5      12.1