Orbit Fit and Astrometric record for 15RJ279

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: 15RJ279   
# Created Wed Dec  8 02:13:31 2021
# Orbit generated from Bernstein formalism
# Fitting     29 observations of     29
# Arc:   2.43y
# First observation: 2015/07/19
#  Last observation: 2017/12/23
Preliminary a, adot, b, bdot, g, gdot:
  -0.000040   0.026877   0.000020  -0.015624   0.026568   0.000000
# Chi-squared of fit:     9.67 DOF:     52 RMS:  0.10
# Min/Max residuals:    -0.23    0.22
# Exact a, adot, b, bdot, g, gdot:
  1.514999E-05  2.643660E-02 -8.609976E-06 -1.539033E-02  2.627618E-02 -2.101120E-03
# Covariance matrix:
  2.1577E-13  3.8887E-14  1.2981E-14 -6.8326E-14  1.7946E-13  2.0422E-12
  3.8887E-14  3.3074E-13  5.2508E-14 -2.3603E-13  2.6556E-13  6.9635E-12
  1.2981E-14  5.2508E-14  1.2153E-13 -1.2112E-13  4.4867E-14  1.5685E-12
 -6.8326E-14 -2.3603E-13 -1.2112E-13  3.1118E-13 -2.1268E-13 -6.9077E-12
  1.7946E-13  2.6556E-13  4.4867E-14 -2.1268E-13  3.5243E-13  6.3039E-12
  2.0422E-12  6.9635E-12  1.5685E-12 -6.9077E-12  6.3039E-12  2.0342E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.803254   10.148465    0.976003    0.014181   -0.287400  2457223.088139
# Heliocentric elements and errors
Epoch:              2457220.5000  =  2015/07/17
Mean Anomaly:          349.76402 +/-     0.046
Argument of Peri:      195.78396 +/-     0.100
Long of Asc Node:      193.44689 +/-     0.000
Inclination:            30.36066 +/-     0.001
Eccentricity:         0.33046107 +/-    0.0002
Semi-Major Axis:     56.31238479 +/-    0.0103
Time of Perihelion: 2461609.1548 +/-      19.8
Perihelion:          37.70333396 +/-    0.0138
Aphelion:            74.92143561 +/-    0.0182
Period (y)              422.5850 +/-      0.12
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           37.86869225 +/-    0.0008
Ecliptic Y            5.78787113 +/-    0.0001
Ecliptic Z            1.86096655 +/-    0.0000
Ecliptic XDOT        -0.00062564 +/-    0.0000
Ecliptic YDOT         0.00268046 +/-    0.0000
Ecliptic ZDOT        -0.00161232 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.35362436 +/-    0.0008
Geocenter to KBO     38.05728519 +/-    0.0009
# Hcoef:  9.43

The following table shows the complete astrometric record for 15RJ279. 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 (15RJ279) followed by the observatory code and reference code for the source of the astrometry.

2015 07  19.58735  00 32 52.584  +06 35 47.11  25.4r 15RJ279   568  C~2lVU      
2015 08  13.48399  00 32 11.269  +06 29 12.67  25.1r 15RJ279   568  C~2lVU      
2015 08  20.42114  00 31 50.943  +06 26 20.45  25.0r 15RJ279   568  C~2lVU      
2015 08  20.47055  00 31 50.801  +06 26 19.25  25.3r 15RJ279   568  C~2lVU      
2015 09  07.56844  00 30 43.697  +06 17 04.47  25.3w 15RJ279   568  C~2lVU      
2015 09  09.39585  00 30 36.020  +06 16 01.23  25.0r 15RJ279   568  C~2lVU      
2015 09  09.43729  00 30 35.838  +06 15 59.93  25.2r 15RJ279   568  C~2lVU      
2015 09  09.47825  00 30 35.660  +06 15 58.39  25.1r 15RJ279   568  C~2lVU      
2015 09  10.50253  00 30 31.298  +06 15 22.40  25.4w 15RJ279   568  C~2lVU      
2015 10  08.34986  00 28 23.928  +05 57 35.10  25.3w 15RJ279   568  C~2lVU      
2015 10  08.40249  00 28 23.671  +05 57 32.69  25.8w 15RJ279   568  C~2lVU      
2015 10  09.31945  00 28 19.426  +05 56 56.32  25.1w 15RJ279   568  C~2lVU      
2015 11  15.26831  00 25 53.211  +05 34 06.70  25.3w 15RJ279   568  C~2lVU      
2015 12  08.23879  00 25 08.091  +05 24 11.76  25.9w 15RJ279   568  C~2lVU      
2016 01  01.30142  00 25 14.310  +05 19 22.55  25.9w 15RJ279   568  C~2lVU      
2016 09  05.47427  00 37 56.179  +06 04 36.32        15RJ279   568  C~2lVU      
2016 09  06.42847  00 37 52.303  +06 04 03.47        15RJ279   568  C~2lVU      
2016 09  26.43536  00 36 23.776  +05 51 44.05        15RJ279   568  C~2lVU      
2016 09  26.44752  00 36 23.709  +05 51 43.57        15RJ279   568  C~2lVU      
2016 11  03.39147  00 33 35.358  +05 27 15.35        15RJ279   568  C~2lVU      
2016 11  03.45641  00 33 35.094  +05 27 13.04        15RJ279   568  C~2lVU      
2016 12  25.25214  00 32 03.772  +05 07 09.92  25.4w 15RJ279   568  C~2lVU      
2016 12  29.24332  00 32 07.137  +05 06 42.46  26.4w 15RJ279   568  C~2lVU      
2017 01  03.21350  00 32 13.575  +05 06 23.49  24.9w 15RJ279   568  C~2lVU      
2017 09  16.50467  00 44 19.512  +05 44 34.02  25.4w 15RJ279   568  C~2lVU      
2017 09  17.40380  00 44 15.543  +05 44 00.57  25.0w 15RJ279   568  C~2lVU      
2017 09  22.45810  00 43 52.763  +05 40 49.30  25.8w 15RJ279   568  C~2lVU      
2017 11  22.37200  00 39 40.730  +05 03 51.47  25.9w 15RJ279   568  C~2lVU      
2017 12  23.29716  00 39 01.817  +04 54 12.46        15RJ279   568  C~2lVU      

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     0.16       0.00    -0.13
     2   0.0682   -721.34    -0.12    -119.70     0.18
     3   0.0872  -1067.67    -0.23    -158.42     0.02
     4   0.0873  -1070.09     0.07    -158.69     0.01
     5   0.1368  -2208.30     0.12    -273.36    -0.03
     6   0.1418  -2338.46     0.00    -286.23     0.01
     7   0.1420  -2341.47     0.02    -286.35     0.16
     8   0.1421  -2344.51    -0.03    -286.72     0.06
     9   0.1449  -2418.49     0.07    -294.07    -0.02
    10   0.2211  -4586.12     0.19    -522.68     0.11
    11   0.2213  -4590.59    -0.04    -523.37    -0.13
    12   0.2238  -4663.19    -0.02    -531.68     0.14
    13   0.3249  -7211.78    -0.10    -923.70    -0.19
    14   0.3878  -8067.60    -0.03   -1202.32    -0.09
    15   0.4537  -8097.38     0.02   -1504.87    -0.00
    16   1.1332   3427.23     0.04   -3499.78     0.08
    17   1.1358   3361.14    -0.19   -3507.33    -0.23
    18   1.1905   1855.77     0.01   -3669.27    -0.09
    19   1.1906   1854.66    -0.12   -3669.32    -0.04
    20   1.2945  -1033.77     0.10   -4031.09    -0.07
    21   1.2946  -1038.30    -0.08   -4031.66     0.01
    22   1.4365  -2766.70     0.18   -4600.15     0.22
    23   1.4474  -2731.33    -0.01   -4645.23    -0.11
    24   1.4610  -2650.40    -0.11   -4700.63     0.06
    25   2.1627   8229.67     0.06   -6845.72     0.01
    26   2.1651   8161.95    -0.00   -6853.45     0.04
    27   2.1790   7773.54     0.07   -6897.08     0.05
    28   2.3457   3436.77    -0.01   -7468.23    -0.02
    29   2.4304   2674.40    -0.03   -7773.58     0.02

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.

15RJ279    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        57.051    57.070    57.032
ecceobj         0.339     0.339     0.338
incobj         30.238    30.238    30.238
qmin           36.037    36.086    35.917
qmax           77.834    78.065    78.111
amean          56.576    56.600    56.512
amin           56.011    55.997    55.915
amax           57.335    57.359    57.328
emean           0.343     0.343     0.343
emin            0.324     0.324     0.325
emax            0.361     0.361     0.363
imean          29.892    29.918    29.880
imin           29.409    29.454    29.369
imax           30.544    30.553    30.444
excite_mean     0.605     0.605     0.605
fracstop        1.000     1.000     1.000
cjmean          2.765     2.765     2.765

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       193.1     191.7     188.9
kozaiamp        180.0     180.0     180.0