Orbit Fit and Astrometric record for 15RK278

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: 15RK278   
# Created Fri Dec  3 02:13:29 2021
# Orbit generated from Bernstein formalism
# Fitting     28 observations of     28
# Arc:   2.25y
# First observation: 2015/06/23
#  Last observation: 2017/09/22
Preliminary a, adot, b, bdot, g, gdot:
  -0.000098   0.025832   0.000015   0.004192   0.025582   0.000000
# Chi-squared of fit:     6.30 DOF:     50 RMS:  0.08
# Min/Max residuals:    -0.28    0.19
# Exact a, adot, b, bdot, g, gdot:
  1.570307E-05  2.528100E-02  2.659105E-06  4.125081E-03  2.518132E-02  4.277370E-03
# Covariance matrix:
  1.9442E-13 -2.1762E-14 -8.8263E-15  1.1521E-14  1.3833E-13  1.3366E-12
 -2.1762E-14  4.7333E-13 -3.7113E-14  1.0149E-13  3.2518E-13  1.0930E-11
 -8.8263E-15 -3.7113E-14  1.2669E-13 -1.0186E-13 -3.5804E-14 -1.1132E-12
  1.1521E-14  1.0149E-13 -1.0186E-13  1.4592E-13  8.1636E-14  3.2178E-12
  1.3833E-13  3.2518E-13 -3.5804E-14  8.1636E-14  3.9239E-13  8.9153E-12
  1.3366E-12  1.0930E-11 -1.1132E-12  3.2178E-12  8.9153E-12  3.4521E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    3.006304   10.375331    1.004784   -0.007922    0.152571  2457197.024748
# Heliocentric elements and errors
Epoch:              2457190.5000  =  2015/06/17
Mean Anomaly:           58.12623 +/-     0.025
Argument of Peri:      303.66616 +/-     0.069
Long of Asc Node:      351.15434 +/-     0.001
Inclination:             9.80170 +/-     0.001
Eccentricity:         0.15184200 +/-    0.0007
Semi-Major Axis:     42.16207808 +/-    0.0103
Time of Perihelion: 2441045.0152 +/-       3.5
Perihelion:          35.76010377 +/-    0.0320
Aphelion:            48.56405240 +/-    0.0330
Period (y)              273.7734 +/-      0.10
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           39.03604131 +/-    0.0010
Ecliptic Y            6.12670214 +/-    0.0002
Ecliptic Z            2.08289365 +/-    0.0001
Ecliptic XDOT        -0.00006380 +/-    0.0000
Ecliptic YDOT         0.00277691 +/-    0.0000
Ecliptic ZDOT         0.00047234 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.56876857 +/-    0.0010
Geocenter to KBO     39.71197603 +/-    0.0010
# Hcoef:  8.05

The following table shows the complete astrometric record for 15RK278. 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 (15RK278) followed by the observatory code and reference code for the source of the astrometry.

2015 06  23.52397  00 33 23.567  +06 52 20.40        15RK278   568  C~2lVQ      
2015 07  14.60825  00 33 35.996  +06 56 19.90  24.2r 15RK278   568  C~2lVQ      
2015 07  19.58736  00 33 33.018  +06 56 38.44  24.1r 15RK278   568  C~2lVQ      
2015 08  20.42114  00 32 24.538  +06 53 03.19  24.0r 15RK278   568  C~2lVQ      
2015 08  20.47055  00 32 24.374  +06 53 02.51  24.0r 15RK278   568  C~2lVQ      
2015 09  07.56844  00 31 14.264  +06 47 14.95  24.1w 15RK278   568  C~2lVQ      
2015 09  09.39585  00 31 06.323  +06 46 32.82  24.2r 15RK278   568  C~2lVQ      
2015 09  09.43729  00 31 06.140  +06 46 31.86  23.9r 15RK278   568  C~2lVQ      
2015 09  09.47825  00 31 05.954  +06 46 30.90  24.1r 15RK278   568  C~2lVQ      
2015 09  18.46210  00 30 25.144  +06 42 48.36  24.3w 15RK278   568  C~2lVQ      
2015 10  08.34986  00 28 50.100  +06 33 38.50  24.1w 15RK278   568  C~2lVQ      
2015 10  08.40250  00 28 49.846  +06 33 36.98  24.1w 15RK278   568  C~2lVQ      
2015 11  10.44543  00 26 29.015  +06 18 48.87  23.8w 15RK278   568  C~2lVQ      
2015 11  10.47307  00 26 28.901  +06 18 48.48  24.3w 15RK278   568  C~2lVQ      
2016 01  01.30664  00 25 22.041  +06 09 41.98  24.3w 15RK278   568  C~2lVQ      
2016 09  05.47832  00 36 26.038  +07 36 00.67  24.4w 15RK278   568  C~2lVQ      
2016 09  05.59522  00 36 25.528  +07 35 57.99  24.5w 15RK278   568  C~2lVQ      
2016 09  06.43252  00 36 22.013  +07 35 39.90  24.1w 15RK278   568  C~2lVQ      
2016 09  06.47297  00 36 21.839  +07 35 39.01  24.2w 15RK278   568  C~2lVQ      
2016 09  06.54431  00 36 21.520  +07 35 37.43  24.1w 15RK278   568  C~2lVQ      
2016 09  06.58642  00 36 21.339  +07 35 36.52  24.4w 15RK278   568  C~2lVQ      
2016 09  27.50093  00 34 45.505  +07 26 53.06  24.0w 15RK278   568  C~2lVQ      
2016 11  03.37989  00 31 57.707  +07 09 47.88  24.3w 15RK278   568  C~2lVQ      
2016 11  03.43780  00 31 57.488  +07 09 46.44  24.4w 15RK278   568  C~2lVQ      
2016 12  25.26033  00 30 16.558  +06 57 02.17  24.4w 15RK278   568  C~2lVQ      
2017 01  02.30275  00 30 22.811  +06 57 15.96  24.3w 15RK278   568  C~2lVQ      
2017 09  16.52796  00 40 43.675  +08 19 35.24  24.1w 15RK278   568  C~2lVQ      
2017 09  22.48140  00 40 16.101  +08 17 05.45  24.3w 15RK278   568  C~2lVQ      

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     0.04       0.00    -0.01
     2   0.0577    264.48     0.03     147.19     0.05
     3   0.0714    231.03     0.07     181.70    -0.01
     4   0.1585   -790.96    -0.16     385.98    -0.01
     5   0.1586   -793.47    -0.06     386.31     0.03
     6   0.2082  -1890.09    -0.09     479.30     0.04
     7   0.2132  -2015.40     0.00     487.35     0.06
     8   0.2133  -2018.28     0.04     487.54     0.05
     9   0.2134  -2021.21     0.00     487.75     0.06
    10   0.2380  -2667.66     0.08     523.70    -0.04
    11   0.2925  -4186.19     0.12     579.41    -0.02
    12   0.2926  -4190.27     0.14     579.51    -0.05
    13   0.3831  -6471.04    -0.05     597.26    -0.28
    14   0.3832  -6472.76    -0.19     597.58     0.06
    15   0.5251  -7606.13     0.03     492.42     0.09
    16   1.2045   3527.44     0.04    1341.16     0.09
    17   1.2048   3519.41    -0.14    1341.67    -0.01
    18   1.2071   3464.23     0.04    1345.55     0.00
    19   1.2073   3461.50     0.05    1345.74    -0.01
    20   1.2074   3456.51    -0.09    1346.15     0.03
    21   1.2076   3453.68    -0.06    1346.37     0.04
    22   1.2648   1937.19     0.05    1425.08    -0.02
    23   1.3658   -761.44     0.01    1466.79     0.03
    24   1.3660   -765.00     0.19    1466.75    -0.00
    25   1.5078  -2447.36    -0.16    1358.53    -0.21
    26   1.5299  -2356.38     0.07    1334.36     0.00
    27   2.2341   8076.79    -0.03    2250.13     0.01
    28   2.2504   7640.86     0.04    2271.91     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.

15RK278    quality flag:3

Type:          5:3EE     5:3EE     5:3EE

axisobj        42.581    42.614    42.549
ecceobj         0.156     0.158     0.155
incobj          9.759     9.759     9.759
qmin           34.933    34.838    34.955
qmax           50.063    50.186    50.169
amean          42.328    42.328    42.328
amin           41.938    41.916    41.968
amax           42.750    42.788    42.760
emean           0.152     0.151     0.151
emin            0.128     0.123     0.130
emax            0.172     0.175     0.175
imean          10.417    10.460    10.407
imin            9.633     9.535     9.694
imax           11.281    11.495    11.184
excite_mean     0.236     0.236     0.236
fracstop        1.000     1.000     1.000
cjmean          3.016     3.016     3.016

libcent 0       180.1     181.5     179.7
libamp  0        48.2      72.4      31.6
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       181.1     180.1     177.0
kozaiamp        180.0     180.0     180.0