Orbit Fit and Astrometric record for 15RK280

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: 15RK280   
# Created Fri Dec  3 02:13:31 2021
# Orbit generated from Bernstein formalism
# Fitting     24 observations of     24
# Arc:   1.47y
# First observation: 2015/07/14
#  Last observation: 2017/01/03
Preliminary a, adot, b, bdot, g, gdot:
  -0.000071   0.017775   0.000015   0.007760   0.021525   0.000000
# Chi-squared of fit:     7.99 DOF:     42 RMS:  0.10
# Min/Max residuals:    -0.28    0.22
# Exact a, adot, b, bdot, g, gdot:
  1.352485E-05  1.748708E-02  5.491959E-06  7.709545E-03  2.131426E-02  1.328224E-03
# Covariance matrix:
  2.9613E-13  9.9637E-15 -2.9862E-14  1.7541E-13  3.3060E-13  1.5352E-11
  9.9637E-15  3.1689E-13 -1.7827E-14  1.0069E-13  2.3791E-13  8.8175E-12
 -2.9862E-14 -1.7827E-14  1.3240E-13 -1.6954E-13 -6.2856E-14 -4.5251E-12
  1.7541E-13  1.0069E-13 -1.6954E-13  5.3969E-13  3.7430E-13  2.8307E-11
  3.3060E-13  2.3791E-13 -6.2856E-14  3.7430E-13  6.4486E-13  3.2753E-11
  1.5352E-11  8.8175E-12 -4.5251E-12  2.8307E-11  3.2753E-11  2.4753E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.256768   11.924632    1.002528    0.003925   -0.174272  2457218.068079
# Heliocentric elements and errors
Epoch:              2457210.5000  =  2015/07/07
Mean Anomaly:          126.95141 +/-     1.576
Argument of Peri:      230.60765 +/-     1.560
Long of Asc Node:        7.87531 +/-     0.000
Inclination:            23.87691 +/-     0.001
Eccentricity:         0.06316634 +/-    0.0018
Semi-Major Axis:     45.26963182 +/-    0.0117
Time of Perihelion: 2417978.1879 +/-     486.7
Perihelion:          42.41011475 +/-    0.0825
Aphelion:            48.12914890 +/-    0.0827
Period (y)              304.5921 +/-      0.12
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           46.26755645 +/-    0.0017
Ecliptic Y            8.74733497 +/-    0.0003
Ecliptic Z            1.02933749 +/-    0.0000
Ecliptic XDOT        -0.00032077 +/-    0.0000
Ecliptic YDOT         0.00222224 +/-    0.0000
Ecliptic ZDOT         0.00099387 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   47.09843081 +/-    0.0017
Geocenter to KBO     46.91695116 +/-    0.0018
# Hcoef:  8.33

The following table shows the complete astrometric record for 15RK280. 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 (15RK280) followed by the observatory code and reference code for the source of the astrometry.

2015 07  14.56729  00 41 53.322  +05 52 16.62  25.1r 15RK280   568  C~2nvq      
2015 07  19.54532  00 41 50.733  +05 52 32.37  25.3r 15RK280   568  C~2nvq      
2015 08  11.50751  00 41 15.222  +05 51 13.99  25.0r 15RK280   568  C~2nvq      
2015 08  11.54916  00 41 15.114  +05 51 13.28  25.5r 15RK280   568  C~2nvq      
2015 09  08.41317  00 39 48.183  +05 44 47.49        15RK280   568  C~2nvq      
2015 09  08.51862  00 39 47.765  +05 44 45.82  24.7r 15RK280   568  C~2nvq      
2015 09  08.56094  00 39 47.604  +05 44 45.23  24.6r 15RK280   568  C~2nvq      
2015 09  09.53652  00 39 43.914  +05 44 26.96  25.3w 15RK280   568  C~2nvq      
2015 09  10.47732  00 39 40.311  +05 44 09.35  25.2w 15RK280   568  C~2nvq      
2015 09  16.46890  00 39 16.751  +05 42 12.56  25.0w 15RK280   568  C~2nvq      
2015 10  07.36274  00 37 49.588  +05 34 43.19  24.9r 15RK280   568  C~2nvq      
2015 10  07.41585  00 37 49.356  +05 34 41.93  24.8r 15RK280   568  C~2nvq      
2015 11  07.26021  00 35 48.469  +05 23 58.94  25.1w 15RK280   568  C~2nvq      
2015 11  07.31307  00 35 48.283  +05 23 58.00  25.4w 15RK280   568  C~2nvq      
2015 11  10.39917  00 35 38.074  +05 23 04.02  25.1w 15RK280   568  C~2nvq      
2015 12  07.33665  00 34 33.501  +05 17 36.49  25.3w 15RK280   568  C~2nvq      
2016 09  05.50258  00 42 59.129  +06 33 59.03  25.1w 15RK280   568  C~2nvq      
2016 09  06.45678  00 42 55.607  +06 33 42.24  25.3w 15RK280   568  C~2nvq      
2016 09  06.49805  00 42 55.468  +06 33 41.66  25.5w 15RK280   568  C~2nvq      
2016 09  26.45968  00 41 35.763  +06 27 08.18  25.0w 15RK280   568  C~2nvq      
2016 11  04.27703  00 38 58.622  +06 13 15.42  25.1w 15RK280   568  C~2nvq      
2016 11  04.33644  00 38 58.410  +06 13 14.28  25.5w 15RK280   568  C~2nvq      
2016 12  29.27436  00 37 20.067  +06 05 04.97  25.9w 15RK280   568  C~2nvq      
2017 01  03.24627  00 37 22.588  +06 05 30.48  25.5w 15RK280   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    -0.11       0.00     0.05
     2   0.0136    -29.39     0.02      29.61    -0.02
     3   0.0765   -547.67     0.19     164.87     0.19
     4   0.0766   -549.44    -0.06     164.85    -0.09
     5   0.1529  -1894.21     0.03     318.19    -0.28
     6   0.1532  -1900.61    -0.05     319.10     0.03
     7   0.1533  -1903.05     0.05     319.50     0.19
     8   0.1560  -1960.88     0.03     324.28    -0.07
     9   0.1585  -2017.26    -0.12     329.17    -0.02
    10   0.1750  -2386.57    -0.16     359.67     0.08
    11   0.2322  -3759.96     0.22     457.21    -0.00
    12   0.2323  -3763.64     0.14     457.41    -0.06
    13   0.3167  -5677.08    -0.05     576.15    -0.05
    14   0.3169  -5680.01    -0.09     576.38    -0.03
    15   0.3253  -5841.53     0.03     586.78     0.09
    16   0.3991  -6857.94    -0.07     665.70    -0.04
    17   1.1470   1881.74     0.08    1919.60     0.12
    18   1.1496   1826.86    -0.24    1924.65    -0.07
    19   1.1497   1824.73     0.05    1924.92    -0.04
    20   1.2044    577.48     0.10    2027.32     0.04
    21   1.3106  -1904.37    -0.01    2179.42     0.01
    22   1.3108  -1907.73     0.02    2179.61    -0.01
    23   1.4612  -3449.06    -0.04    2305.89     0.10
    24   1.4748  -3404.44     0.04    2314.56    -0.12

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.

15RK280    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        45.679    45.720    45.642
ecceobj         0.058     0.064     0.053
incobj         23.750    23.750    23.749
qmin           42.021    41.793    42.176
qmax           49.165    49.419    48.911
amean          45.459    45.505    45.423
amin           45.106    45.155    45.068
amax           45.833    45.874    45.796
emean           0.061     0.066     0.057
emin            0.051     0.055     0.047
emax            0.073     0.077     0.068
imean          23.993    23.999    23.989
imin           23.732    23.745    23.733
imax           24.251    24.256    24.246
excite_mean     0.411     0.412     0.411
fracstop        1.000     1.000     1.000
cjmean          2.903     2.903     2.903

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       181.7     180.6     182.5
kozaiamp        180.0     180.0     180.0