Orbit Fit and Astrometric record for 15RG278

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: 15RG278   
# Created Sat Dec  4 02:13:30 2021
# Orbit generated from Bernstein formalism
# Fitting     30 observations of     30
# Arc:   2.25y
# First observation: 2015/06/23
#  Last observation: 2017/09/22
Preliminary a, adot, b, bdot, g, gdot:
  -0.000093   0.031651   0.000004   0.001563   0.027970   0.000000
# Chi-squared of fit:     9.39 DOF:     54 RMS:  0.10
# Min/Max residuals:    -0.27    0.25
# Exact a, adot, b, bdot, g, gdot:
  1.795655E-05  3.082237E-02  7.009302E-07  1.520525E-03  2.741978E-02  1.529355E-03
# Covariance matrix:
  1.8939E-13 -3.3451E-14 -4.5470E-15  2.0392E-15  1.2868E-13  6.8250E-13
 -3.3451E-14  5.4825E-13 -1.9001E-14  4.0675E-14  3.3721E-13  1.0385E-11
 -4.5470E-15 -1.9001E-14  1.1707E-13 -8.9705E-14 -1.7500E-14 -4.3159E-13
  2.0392E-15  4.0675E-14 -8.9705E-14  1.1534E-13  2.7432E-14  9.9520E-13
  1.2868E-13  3.3721E-13 -1.7500E-14  2.7432E-14  3.7311E-13  7.2149E-12
  6.8250E-13  1.0385E-11 -4.3159E-13  9.9520E-13  7.2149E-12  2.5259E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.084191   10.154046    1.005356   -0.005327    0.148869  2457197.020648
# Heliocentric elements and errors
Epoch:              2457190.5000  =  2015/06/17
Mean Anomaly:            5.94325 +/-     0.143
Argument of Peri:       27.50879 +/-     0.204
Long of Asc Node:      332.67403 +/-     0.006
Inclination:             3.56556 +/-     0.000
Eccentricity:         0.16545817 +/-    0.0001
Semi-Major Axis:     43.46794533 +/-    0.0037
Time of Perihelion: 2455462.3809 +/-      41.6
Perihelion:          36.27581875 +/-    0.0062
Aphelion:            50.66007191 +/-    0.0069
Period (y)              286.5906 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           35.90214315 +/-    0.0008
Ecliptic Y            5.40986253 +/-    0.0001
Ecliptic Z            1.32642774 +/-    0.0000
Ecliptic XDOT        -0.00040025 +/-    0.0000
Ecliptic YDOT         0.00304909 +/-    0.0000
Ecliptic ZDOT         0.00015734 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   36.33166533 +/-    0.0008
Geocenter to KBO     36.47002775 +/-    0.0008
# Hcoef:  8.91

The following table shows the complete astrometric record for 15RG278. 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 (15RG278) followed by the observatory code and reference code for the source of the astrometry.

2015 06  23.51987  00 34 02.209  +05 56 15.68  24.2r 15RG278   568  C~2lVP      
2015 07  19.59146  00 34 17.174  +05 59 54.73  24.9r 15RG278   568  C~2lVP      
2015 08  13.47989  00 33 30.642  +05 56 46.81  24.4r 15RG278   568  C~2lVP      
2015 08  19.58390  00 33 11.186  +05 55 06.27  24.7r 15RG278   568  C~2lVP      
2015 08  19.61259  00 33 11.094  +05 55 05.56  25.1r 15RG278   568  C~2lVP      
2015 09  07.56274  00 31 54.898  +05 47 58.89  24.4w 15RG278   568  C~2lVP      
2015 09  09.39169  00 31 46.534  +05 47 10.14  24.4r 15RG278   568  C~2lVP      
2015 09  09.43322  00 31 46.346  +05 47 09.00  24.6r 15RG278   568  C~2lVP      
2015 09  09.47414  00 31 46.150  +05 47 07.87  24.4r 15RG278   568  C~2lVP      
2015 09  10.49775  00 31 41.403  +05 46 39.97  24.7w 15RG278   568  C~2lVP      
2015 09  18.45683  00 31 03.187  +05 42 52.54  24.5w 15RG278   568  C~2lVP      
2015 09  18.49367  00 31 02.993  +05 42 51.47  24.9w 15RG278   568  C~2lVP      
2015 10  09.31421  00 29 17.868  +05 32 02.43  24.8w 15RG278   568  C~2lVP      
2015 11  10.43997  00 26 54.053  +05 16 17.21  24.5w 15RG278   568  C~2lVP      
2015 12  08.23879  00 25 46.091  +05 07 55.47  24.8w 15RG278   568  C~2lVP      
2016 01  01.30142  00 25 48.655  +05 06 59.67  24.9w 15RG278   568  C~2lVP      
2016 09  05.47427  00 38 34.899  +06 36 16.01        15RG278   568  C~2lVP      
2016 09  05.49045  00 38 34.824  +06 36 15.42        15RG278   568  C~2lVP      
2016 09  06.42847  00 38 30.670  +06 35 51.74        15RG278   568  C~2lVP      
2016 09  06.44465  00 38 30.599  +06 35 51.44        15RG278   568  C~2lVP      
2016 09  06.46893  00 38 30.486  +06 35 50.81        15RG278   568  C~2lVP      
2016 09  06.48592  00 38 30.412  +06 35 50.37        15RG278   568  C~2lVP      
2016 09  26.43536  00 36 54.350  +06 26 21.87  24.5w 15RG278   568  C~2lVP      
2016 10  26.40787  00 34 25.742  +06 10 43.92  24.3r 15RG278   568  C~2lVQ      
2016 10  26.47363  00 34 25.443  +06 10 41.80  24.3r 15RG278   568  C~2lVQ      
2016 11  03.40304  00 33 50.849  +06 06 52.54        15RG278   568  C~2lVQ      
2016 11  03.46810  00 33 50.572  +06 06 50.71        15RG278   568  C~2lVQ      
2017 01  02.29442  00 32 14.064  +05 53 55.30  25.0w 15RG278   568  C~2lVQ      
2017 09  16.50931  00 44 19.893  +07 18 49.47  24.6w 15RG278   568  C~2lVQ      
2017 09  22.46275  00 43 50.799  +07 15 58.18  24.6w 15RG278   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     0.04
     2   0.0714    291.46     0.08     113.49    -0.13
     3   0.1395   -420.65    -0.27     214.06     0.05
     4   0.1562   -727.07     0.04     236.01     0.25
     5   0.1563   -728.61     0.09     235.90     0.03
     6   0.2082  -1941.76    -0.03     292.07     0.01
     7   0.2132  -2075.70    -0.06     296.52     0.13
     8   0.2133  -2078.73     0.03     296.58     0.07
     9   0.2134  -2081.86    -0.02     296.70     0.07
    10   0.2162  -2157.97     0.08     299.02    -0.02
    11   0.2380  -2771.88     0.20     315.21    -0.25
    12   0.2381  -2774.96     0.09     315.37    -0.18
    13   0.2951  -4473.53    -0.10     339.41     0.00
    14   0.3831  -6821.70    -0.08     322.00    -0.21
    15   0.4592  -7954.12     0.07     264.10    -0.03
    16   0.5251  -7941.08    -0.07     197.63    -0.03
    17   1.2045   4682.64     0.10     611.05     0.10
    18   1.2046   4681.38     0.00     610.94    -0.05
    19   1.2071   4615.12    -0.10     613.40     0.01
    20   1.2072   4614.03    -0.02     613.54     0.10
    21   1.2073   4612.23    -0.06     613.62     0.11
    22   1.2073   4611.05    -0.02     613.64     0.08
    23   1.2619   3070.61     0.03     651.90    -0.11
    24   1.3440    664.42     0.04     660.02     0.08
    25   1.3442    659.48     0.07     659.82    -0.10
    26   1.3659     94.96    -0.07     652.14     0.00
    27   1.3660     90.44    -0.11     652.09     0.00
    28   1.5298  -1538.33     0.09     506.77     0.09
    29   2.2341  10416.70     0.07     957.76    -0.01
    30   2.2504   9950.15    -0.06     968.32    -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.

15RG278    quality flag:3

Type:         7:4EEE    7:4EEE    7:4EEE

axisobj        43.955    43.972    43.939
ecceobj         0.175     0.176     0.175
incobj          3.555     3.555     3.555
qmin           35.660    35.920    35.217
qmax           52.114    51.785    52.699
amean          43.727    43.727    43.727
amin           43.319    43.323    43.293
amax           44.189    44.174    44.216
emean           0.147     0.132     0.165
emin            0.100     0.074     0.124
emax            0.181     0.176     0.193
imean           5.984     6.972     4.300
imin            3.357     4.798     1.566
imax            8.872     9.816     7.390
excite_mean     0.183     0.182     0.184
fracstop        1.000     1.000     1.000
cjmean          3.057     3.058     3.057

libcent 0       187.0     182.3     179.3
libamp  0       102.2     147.8      98.1
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        77.2      83.0      91.5
kozaiamp         57.5      67.4      80.4