Orbit Fit and Astrometric record for 15RT278

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: 15RT278   
# Created Wed Dec  8 02:13:31 2021
# Orbit generated from Bernstein formalism
# Fitting     31 observations of     31
# Arc:   2.36y
# First observation: 2015/07/14
#  Last observation: 2017/11/22
Preliminary a, adot, b, bdot, g, gdot:
  -0.000105   0.029846   0.000022  -0.009550   0.027646   0.000000
# Chi-squared of fit:     7.60 DOF:     56 RMS:  0.09
# Min/Max residuals:    -0.23    0.21
# Exact a, adot, b, bdot, g, gdot:
  1.683043E-05  2.927247E-02 -5.038201E-06 -9.365112E-03  2.729489E-02 -1.251231E-03
# Covariance matrix:
  1.4416E-13 -3.3649E-14 -1.6430E-16 -9.1782E-15  8.5971E-14  5.2455E-13
 -3.3649E-14  4.5704E-13  3.2476E-14 -1.6302E-13  3.0963E-13  9.0543E-12
 -1.6430E-16  3.2476E-14  1.1495E-13 -9.5399E-14  2.0426E-14  9.0825E-13
 -9.1782E-15 -1.6302E-13 -9.5399E-14  1.7341E-13 -1.1993E-13 -4.3337E-12
  8.5971E-14  3.0963E-13  2.0426E-14 -1.1993E-13  3.4703E-13  6.6870E-12
  5.2455E-13  9.0543E-12  9.0825E-13 -4.3337E-12  6.6870E-12  2.4037E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    3.232533   12.342426    1.003799    0.009509   -0.166579  2457218.059119
# Heliocentric elements and errors
Epoch:              2457210.5000  =  2015/07/07
Mean Anomaly:          343.50619 +/-     0.106
Argument of Peri:      194.05338 +/-     0.164
Long of Asc Node:      200.74713 +/-     0.000
Inclination:            17.98796 +/-     0.001
Eccentricity:         0.19214810 +/-    0.0002
Semi-Major Axis:     44.90734472 +/-    0.0050
Time of Perihelion: 2462246.5833 +/-      32.5
Perihelion:          36.27848387 +/-    0.0110
Aphelion:            53.53620557 +/-    0.0119
Period (y)              300.9430 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           36.10715552 +/-    0.0008
Ecliptic Y            6.87420145 +/-    0.0002
Ecliptic Z            2.06576432 +/-    0.0000
Ecliptic XDOT        -0.00070058 +/-    0.0000
Ecliptic YDOT         0.00284661 +/-    0.0000
Ecliptic ZDOT        -0.00094490 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   36.81370271 +/-    0.0008
Geocenter to KBO     36.63689133 +/-    0.0008
# Hcoef:  8.58

The following table shows the complete astrometric record for 15RT278. 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 (15RT278) followed by the observatory code and reference code for the source of the astrometry.

2015 07  14.55833  00 40 19.079  +07 51 09.65  24.2r 15RT278   568  C~2lVR      
2015 07  19.53712  00 40 18.155  +07 51 03.72  24.2r 15RT278   568  C~2lVR      
2015 08  13.50040  00 39 38.523  +07 46 38.88  23.7r 15RT278   568  C~2lVR      
2015 08  19.56300  00 39 20.844  +07 44 38.01  24.0r 15RT278   568  C~2lVR      
2015 08  20.43842  00 39 18.059  +07 44 18.92  23.8r 15RT278   568  C~2lVR      
2015 08  20.48764  00 39 17.888  +07 44 17.96  24.3r 15RT278   568  C~2lVR      
2015 09  07.58494  00 38 09.102  +07 36 18.00  24.8w 15RT278   568  C~2lVR      
2015 09  09.41265  00 38 01.168  +07 35 21.53  24.2r 15RT278   568  C~2lVR      
2015 09  09.45371  00 38 00.984  +07 35 20.25  24.4r 15RT278   568  C~2lVR      
2015 09  09.49464  00 38 00.798  +07 35 18.97  24.6r 15RT278   568  C~2lVR      
2015 09  10.51893  00 37 56.262  +07 34 46.59  24.5w 15RT278   568  C~2lVR      
2015 09  18.48318  00 37 19.673  +07 30 23.48  24.7w 15RT278   568  C~2lVR      
2015 11  10.46703  00 33 16.533  +06 58 25.92  24.3w 15RT278   568  C~2lVR      
2015 12  08.26533  00 32 08.167  +06 46 22.29  24.3w 15RT278   568  C~2lVR      
2016 07  07.58323  00 47 20.336  +08 00 28.34  24.8w 15RT278   568  C~2lVR      
2016 07  08.56262  00 47 21.137  +08 00 32.45  24.5w 15RT278   568  C~2lVR      
2016 09  05.48236  00 45 27.845  +07 46 52.06        15RT278   568  C~2lVR      
2016 09  05.57499  00 45 27.449  +07 46 49.26        15RT278   568  C~2lVR      
2016 09  06.43656  00 45 23.846  +07 46 23.55        15RT278   568  C~2lVR      
2016 09  06.47701  00 45 23.679  +07 46 22.32        15RT278   568  C~2lVR      
2016 09  06.52410  00 45 23.496  +07 46 20.85        15RT278   568  C~2lVR      
2016 09  06.56619  00 45 23.287  +07 46 19.71        15RT278   568  C~2lVR      
2016 09  26.43941  00 43 51.670  +07 35 15.41  24.2w 15RT278   568  C~2lVR      
2016 09  27.47990  00 43 46.575  +07 34 37.87  24.4w 15RT278   568  C~2lVR      
2016 11  04.28877  00 40 48.528  +07 11 31.63        15RT278   568  C~2lVR      
2016 11  04.34801  00 40 48.265  +07 11 29.48        15RT278   568  C~2lVR      
2016 12  29.29357  00 39 08.159  +06 52 01.81  24.7w 15RT278   568  C~2lVR      
2017 01  02.32887  00 39 12.492  +06 51 47.79  24.3w 15RT278   568  C~2lVR      
2017 09  16.52330  00 51 55.696  +07 50 41.35  24.3w 15RT278   568  C~2lVR      
2017 09  22.47675  00 51 27.808  +07 47 18.60  24.2w 15RT278   568  C~2lVR      
2017 11  22.34591  00 46 57.833  +07 12 01.27  25.0w 15RT278   568  C~2lVR      

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     0.03       0.00    -0.08
     2   0.0136    -14.96     0.06      -0.07    -0.02
     3   0.0820   -660.60    -0.08     -12.52     0.16
     4   0.0986   -949.72     0.10     -20.50    -0.21
     5   0.1010   -995.29    -0.04     -21.79    -0.13
     6   0.1011   -998.00    -0.11     -21.68     0.03
     7   0.1507  -2126.98     0.02     -61.00     0.03
     8   0.1557  -2257.66     0.12     -66.50     0.04
     9   0.1558  -2260.68     0.13     -66.60     0.04
    10   0.1559  -2263.73     0.10     -66.69     0.05
    11   0.1587  -2338.48    -0.02     -69.92    -0.02
    12   0.1805  -2942.31    -0.12     -97.57     0.10
    13   0.3256  -7026.03    -0.23    -430.71     0.11
    14   0.4017  -8249.22     0.09    -692.02    -0.01
    15   0.9830   5981.91     0.01   -1929.03     0.01
    16   0.9856   5994.48    -0.06   -1929.87    -0.01
    17   1.1470   4123.45    -0.05   -2030.85     0.00
    18   1.1472   4116.94    -0.08   -2031.14    -0.03
    19   1.1496   4057.58    -0.14   -2033.96     0.04
    20   1.1497   4054.81    -0.04   -2034.12    -0.02
    21   1.1498   4051.73     0.21   -2034.42    -0.18
    22   1.1499   4048.43    -0.11   -2034.26     0.10
    23   1.2043   2534.81    -0.03   -2114.83    -0.01
    24   1.2072   2450.40     0.10   -2119.81     0.01
    25   1.3107   -529.66     0.16   -2359.40    -0.01
    26   1.3109   -534.11    -0.12   -2359.84    -0.03
    27   1.4613  -2363.36     0.02   -2849.16    -0.01
    28   1.4723  -2309.52     0.02   -2887.40     0.00
    29   2.1765   9532.71     0.06   -4056.94    -0.02
    30   2.1928   9071.12     0.01   -4083.83    -0.01
    31   2.3594   4543.40    -0.02   -4478.86     0.08

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.

15RT278    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        45.408    45.418    45.399
ecceobj         0.200     0.200     0.200
incobj         17.915    17.915    17.915
qmin           35.949    35.950    35.741
qmax           54.501    54.520    54.919
amean          45.103    45.103    45.103
amin           44.722    44.728    44.712
amax           45.533    45.527    45.542
emean           0.174     0.172     0.175
emin            0.142     0.140     0.146
emax            0.200     0.200     0.206
imean          18.998    19.057    18.951
imin           18.059    18.058    17.848
imax           19.767    19.782    19.739
excite_mean     0.369     0.369     0.369
fracstop        1.000     1.000     1.000
cjmean          2.947     2.947     2.947

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       185.8     186.3     186.8
kozaiamp        180.0     179.9     180.0