Orbit Fit and Astrometric record for 15RO280

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: 15RO280   
# Created Tue Apr 23 01:10:45 2019
# Orbit generated from Bernstein formalism
# Fitting   30 observations of   30
# Arc:   2.50y
# First observation: 2015/06/23
#  Last observation: 2017/12/23
Preliminary a, adot, b, bdot, g, gdot:
  -0.000101   0.021617  -0.000016  -0.015011   0.025611   0.000000
# Chi-squared of fit:    17.12 DOF:   54 RMS:  0.13
# Min/Max residuals:    -0.27    0.33
# Exact a, adot, b, bdot, g, gdot:
  1.365948E-05  2.114970E-02 -8.461553E-06 -1.476414E-02  2.523364E-02  5.001602E-04
# Covariance matrix:
  1.7757E-13  1.4504E-14  1.1213E-14 -6.0911E-14  1.4895E-13  2.0023E-12
  1.4504E-14  2.6413E-13  4.3424E-14 -1.9447E-13  2.4759E-13  6.3040E-12
  1.1213E-14  4.3424E-14  1.2387E-13 -1.3597E-13  5.0000E-14  2.0162E-12
 -6.0911E-14 -1.9447E-13 -1.3597E-13  3.5202E-13 -2.3502E-13 -8.5453E-12
  1.4895E-13  2.4759E-13  5.0000E-14 -2.3502E-13  3.7335E-13  7.6474E-12
  2.0023E-12  6.3040E-12  2.0162E-12 -8.5453E-12  7.6474E-12  2.7575E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.587695    8.291319    1.009735   -0.005126    0.115489  2457197.056068
# Heliocentric elements and errors
Epoch:              2457190.5000  =  2015/06/17
Mean Anomaly:          356.44455 +/-     0.823
Argument of Peri:      179.32390 +/-     0.897
Long of Asc Node:      190.53806 +/-     0.000
Inclination:            34.99412 +/-     0.001
Eccentricity:         0.04286084 +/-    0.0001
Semi-Major Axis:     41.28967459 +/-    0.0025
Time of Perihelion: 2458147.5906 +/-     221.5
Perihelion:          39.51996431 +/-    0.0032
Aphelion:            43.05938486 +/-    0.0034
Period (y)              265.3202 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           39.20315983 +/-    0.0010
Ecliptic Y            4.69354782 +/-    0.0001
Ecliptic Z            1.78893990 +/-    0.0000
Ecliptic XDOT        -0.00020817 +/-    0.0000
Ecliptic YDOT         0.00228277 +/-    0.0000
Ecliptic ZDOT        -0.00159776 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.52363138 +/-    0.0009
Geocenter to KBO     39.62962953 +/-    0.0010
# Hcoef:  9.21

The following table shows the complete astrometric record for 15RO280. 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 (15RO280) followed by the observatory code and reference code for the source of the astrometry.

2015 06  23.55529  00 26 21.734  +05 39 57.00  25.9r 15RO280   568  C~2nvq      
2015 07  14.60008  00 26 33.227  +05 39 29.44  25.1r 15RO280   568  C~2nvq      
2015 07  19.57916  00 26 30.059  +05 38 44.25  25.2r 15RO280   568  C~2nvq      
2015 08  19.57540  00 25 24.058  +05 28 44.68  25.2r 15RO280   568  C~2nvq      
2015 08  19.60440  00 25 23.958  +05 28 43.81  24.8r 15RO280   568  C~2nvq      
2015 08  20.40889  00 25 21.310  +05 28 21.19  24.9r 15RO280   568  C~2nvq      
2015 08  20.45757  00 25 21.146  +05 28 19.81  25.1r 15RO280   568  C~2nvq      
2015 09  07.55453  00 24 11.921  +05 18 46.40  25.3w 15RO280   568  C~2nvq      
2015 09  09.38065  00 24 04.110  +05 17 41.92  24.9r 15RO280   568  C~2nvq      
2015 09  09.42501  00 24 03.914  +05 17 40.25  24.6r 15RO280   568  C~2nvq      
2015 09  09.46595  00 24 03.735  +05 17 38.96  24.9r 15RO280   568  C~2nvq      
2015 10  08.33404  00 21 51.529  +04 59 10.58  25.6w 15RO280   568  C~2nvq      
2015 10  08.38664  00 21 51.305  +04 59 08.61  25.1w 15RO280   568  C~2nvq      
2015 10  09.30373  00 21 47.080  +04 58 32.06  24.9w 15RO280   568  C~2nvq      
2015 12  08.22831  00 18 39.679  +04 26 39.79  25.3w 15RO280   568  C~2nvq      
2016 01  01.29102  00 18 46.298  +04 22 13.44  24.6w 15RO280   568  C~2nvq      
2016 09  05.47023  00 30 14.908  +05 01 07.89        15RO280   568  C~2nvq      
2016 09  06.42437  00 30 10.936  +05 00 34.41        15RO280   568  C~2nvq      
2016 09  06.46487  00 30 10.754  +05 00 33.18        15RO280   568  C~2nvq      
2016 09  25.31706  00 28 46.698  +04 48 51.02  24.8w 15RO280   568  C~2nvq      
2016 09  26.42319  00 28 41.543  +04 48 07.47  24.8w 15RO280   568  C~2nvq      
2016 10  30.34865  00 26 10.719  +04 26 21.38        15RO280   568  C~2nvq      
2016 11  03.30427  00 25 55.720  +04 24 02.75  25.7w 15RO280   568  C~2nvq      
2016 11  03.35669  00 25 55.521  +04 24 00.74  25.0w 15RO280   568  C~2nvq      
2016 12  24.27431  00 24 27.695  +04 05 02.77  25.4w 15RO280   568  C~2nvq      
2017 01  02.26396  00 24 36.849  +04 04 19.64  24.8w 15RO280   568  C~2nvq      
2017 01  29.22410  00 25 49.440  +04 07 08.78        15RO280   568  C~2nvq      
2017 09  15.44482  00 35 30.402  +04 36 40.31  25.5w 15RO280   568  C~2nvq      
2017 09  22.50999  00 34 58.472  +04 32 12.47  26.6w 15RO280   568  C~2nvq      
2017 12  23.30656  00 30 16.542  +03 47 07.85  25.6w 15RO280   568  C~2nvq      

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    -0.08       0.00    -0.16
  2   0.0576    146.67     0.10     -93.16    -0.18
  3   0.0712     85.36     0.02    -115.97    -0.09
  4   0.1561  -1056.83     0.19    -276.68     0.33
  5   0.1562  -1058.55     0.13    -276.89     0.28
  6   0.1584  -1103.81    -0.08    -282.01     0.02
  7   0.1585  -1106.61    -0.07    -282.31    -0.02
  8   0.2081  -2283.05     0.03    -399.27    -0.10
  9   0.2131  -2415.73    -0.12    -412.22    -0.05
 10   0.2132  -2419.08    -0.18    -412.59    -0.13
 11   0.2133  -2422.05    -0.09    -412.72     0.01
 12   0.2923  -4675.53    -0.17    -646.39     0.05
 13   0.2925  -4679.39     0.19    -646.87     0.01
 14   0.2950  -4751.89    -0.09    -655.33    -0.08
 15   0.4591  -8086.26    -0.08   -1296.04    -0.06
 16   0.5249  -8101.59     0.25   -1580.01     0.21
 17   1.2044   2280.25     0.27   -3515.27     0.12
 18   1.2070   2212.49    -0.02   -3522.65    -0.06
 19   1.2071   2209.50    -0.08   -3522.71     0.17
 20   1.2588    777.90     0.07   -3672.46     0.32
 21   1.2618    689.90    -0.04   -3682.06    -0.07
 22   1.3547  -1898.20    -0.13   -3990.94    -0.23
 23   1.3655  -2159.14     0.11   -4029.54    -0.09
 24   1.3656  -2162.67     0.02   -4030.21    -0.27
 25   1.5050  -3820.46    -0.16   -4555.52    -0.03
 26   1.5297  -3711.74     0.06   -4649.42     0.05
 27   1.6035  -2646.96     0.05   -4924.12     0.07
 28   2.2310   6042.83     0.01   -6722.46    -0.03
 29   2.2504   5497.90    -0.08   -6781.33     0.07
 30   2.5017    552.13    -0.02   -7608.52    -0.04

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.

15RO280    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        41.611    41.620    41.603
ecceobj         0.050     0.051     0.050
incobj         34.840    34.841    34.839
qmin           38.865    38.862    38.881
qmax           44.166    44.183    44.178
amean          41.444    41.451    41.436
amin           41.141    41.143    41.125
amax           41.750    41.774    41.754
emean           0.048     0.048     0.048
emin            0.038     0.038     0.038
emax            0.058     0.058     0.058
imean          34.893    34.893    34.893
imin           34.632    34.630    34.629
imax           35.153    35.157    35.151
excite_mean     0.574     0.574     0.574
fracstop        1.000     1.000     1.000
cjmean          2.649     2.649     2.649

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       183.7     184.0     184.1
kozaiamp        180.0     180.0     180.0