Orbit Fit and Astrometric record for 15RD281

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: 15RD281   
# Created Thu Apr 18 01:10:36 2019
# Orbit generated from Bernstein formalism
# Fitting   29 observations of   29
# Arc:   2.09y
# First observation: 2015/08/20
#  Last observation: 2017/09/22
Preliminary a, adot, b, bdot, g, gdot:
  -0.000071   0.026156   0.000005  -0.008119   0.026178   0.000000
# Chi-squared of fit:    12.39 DOF:   52 RMS:  0.12
# Min/Max residuals:    -0.24    0.38
# Exact a, adot, b, bdot, g, gdot:
  1.554417E-05  2.616658E-02 -4.425171E-06 -8.163805E-03  2.639700E-02  2.977291E-03
# Covariance matrix:
  1.7358E-13 -2.0482E-14  3.7970E-15 -2.3159E-14  1.3046E-13  1.7034E-12
 -2.0482E-14  4.0351E-13  2.1638E-14 -1.2499E-13  2.7690E-13  9.0373E-12
  3.7970E-15  2.1638E-14  1.1887E-13 -1.0112E-13  1.8888E-14  7.2810E-13
 -2.3159E-14 -1.2499E-13 -1.0112E-13  1.8313E-13 -1.1102E-13 -4.1873E-12
  1.3046E-13  2.7690E-13  1.8888E-14 -1.1102E-13  3.6963E-13  8.0722E-12
  1.7034E-12  9.0373E-12  7.2810E-13 -4.1873E-12  8.0722E-12  3.0231E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    3.032791   10.909540    0.703417    0.038806   -0.730187  2457254.931009
# Heliocentric elements and errors
Epoch:              2457250.5000  =  2015/08/16
Mean Anomaly:           49.93230 +/-     0.105
Argument of Peri:      109.63481 +/-     0.168
Long of Asc Node:      199.34430 +/-     0.000
Inclination:            17.51442 +/-     0.001
Eccentricity:         0.10965752 +/-    0.0006
Semi-Major Axis:     41.20095731 +/-    0.0057
Time of Perihelion: 2443852.5459 +/-      28.0
Perihelion:          36.68296239 +/-    0.0247
Aphelion:            45.71895224 +/-    0.0250
Period (y)              264.4656 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           37.99382285 +/-    0.0009
Ecliptic Y            6.60741815 +/-    0.0002
Ecliptic Z            2.00416684 +/-    0.0000
Ecliptic XDOT        -0.00016885 +/-    0.0000
Ecliptic YDOT         0.00272537 +/-    0.0000
Ecliptic ZDOT        -0.00082916 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.61612660 +/-    0.0008
Geocenter to KBO     37.88308709 +/-    0.0009
# Hcoef:  9.43

The following table shows the complete astrometric record for 15RD281. 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 (15RD281) followed by the observatory code and reference code for the source of the astrometry.

2015 08  20.43022  00 35 19.609  +07 06 24.45  25.5r 15RD281   568  C~2nvs      
2015 08  20.47949  00 35 19.463  +07 06 23.70  25.4r 15RD281   568  C~2nvs      
2015 09  07.57672  00 34 11.405  +06 58 33.00  25.6w 15RD281   568  C~2nvs      
2015 09  09.40442  00 34 03.630  +06 57 38.14  25.1r 15RD281   568  C~2nvs      
2015 09  09.44553  00 34 03.441  +06 57 36.90  24.7r 15RD281   568  C~2nvs      
2015 09  09.48644  00 34 03.267  +06 57 35.63  25.3r 15RD281   568  C~2nvs      
2015 09  10.51074  00 33 58.825  +06 57 04.48  25.4w 15RD281   568  C~2nvs      
2015 09  18.47260  00 33 23.148  +06 52 50.06  25.9w 15RD281   568  C~2nvs      
2015 10  08.36042  00 31 49.128  +06 41 17.47  25.0w 15RD281   568  C~2nvs      
2015 10  08.41303  00 31 48.875  +06 41 15.28  25.5w 15RD281   568  C~2nvs      
2015 10  09.33000  00 31 44.538  +06 40 42.42  25.2w 15RD281   568  C~2nvs      
2015 12  08.25463  00 28 24.059  +06 11 19.55  25.4w 15RD281   568  C~2nvs      
2016 01  01.31705  00 28 25.376  +06 07 31.56  26.0w 15RD281   568  C~2nvs      
2016 01  02.26815  00 28 26.626  +06 07 30.16  25.4w 15RD281   568  C~2nvs      
2016 09  05.49045  00 40 34.842  +07 08 40.17  25.3w 15RD281   568  C~2nvs      
2016 09  05.50664  00 40 34.782  +07 08 40.10  25.1w 15RD281   568  C~2nvs      
2016 09  06.44465  00 40 30.929  +07 08 12.58  25.4w 15RD281   568  C~2nvs      
2016 09  06.46082  00 40 30.868  +07 08 12.08  25.3w 15RD281   568  C~2nvs      
2016 09  06.48592  00 40 30.775  +07 08 11.30  25.6w 15RD281   568  C~2nvs      
2016 09  06.50211  00 40 30.698  +07 08 10.77  26.1w 15RD281   568  C~2nvs      
2016 09  26.44346  00 39 01.201  +06 57 29.24  25.3w 15RD281   568  C~2nvs      
2016 11  04.27703  00 36 05.843  +06 35 02.17        15RD281   568  C~2nvs      
2016 11  04.33644  00 36 05.604  +06 35 00.34        15RD281   568  C~2nvs      
2016 12  29.24794  00 34 32.024  +06 17 15.47  25.2w 15RD281   568  C~2nvs      
2016 12  29.27436  00 34 32.040  +06 17 15.50  25.0w 15RD281   568  C~2nvs      
2017 01  03.21812  00 34 37.482  +06 17 05.29  25.0w 15RD281   568  C~2nvs      
2017 01  03.24627  00 34 37.518  +06 17 05.33  25.5w 15RD281   568  C~2nvs      
2017 09  15.43089  00 46 09.899  +07 12 54.19  25.3w 15RD281   568  C~2nvt      
2017 09  22.49605  00 45 37.911  +07 09 04.42  25.1w 15RD281   568  C~2nvt      

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    -0.10
  2   0.0001     -2.29     0.38       0.17     0.10
  3   0.0497  -1118.97    -0.13     -33.40    -0.06
  4   0.0547  -1246.99    -0.02     -38.18    -0.07
  5   0.0548  -1250.07    -0.14     -38.21    -0.02
  6   0.0549  -1252.95    -0.07     -38.36    -0.08
  7   0.0577  -1326.01    -0.10     -40.91     0.10
  8   0.0795  -1914.59     0.08     -65.17     0.01
  9   0.1340  -3474.98     0.11    -148.40     0.18
 10   0.1341  -3479.30     0.01    -148.92    -0.11
 11   0.1366  -3551.67     0.01    -153.56    -0.06
 12   0.3007  -6996.10     0.14    -588.87    -0.11
 13   0.3666  -7068.64    -0.23    -806.06     0.08
 14   0.3692  -7052.06    -0.03    -814.75     0.05
 15   1.0460   4369.84    -0.24   -1716.14     0.03
 16   1.0461   4368.99     0.02   -1715.86     0.35
 17   1.0486   4305.42    -0.09   -1718.76     0.06
 18   1.0487   4304.39    -0.00   -1718.87    -0.01
 19   1.0487   4302.81     0.16   -1719.04    -0.13
 20   1.0488   4301.54     0.02   -1719.08    -0.13
 21   1.1034   2823.93    -0.11   -1787.84     0.05
 22   1.2097   -107.51     0.08   -2001.45    -0.07
 23   1.2099   -111.50     0.04   -2001.73     0.02
 24   1.3602  -1813.06     0.03   -2431.70    -0.02
 25   1.3603  -1812.83     0.02   -2431.77     0.12
 26   1.3738  -1742.27    -0.01   -2473.12    -0.08
 27   1.3739  -1741.76     0.02   -2473.29    -0.04
 28   2.0726   9067.17    -0.14   -3427.09     0.02
 29   2.0919   8538.22     0.18   -3453.81    -0.10

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.

15RD281    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        41.598    41.619    41.578
ecceobj         0.116     0.117     0.114
incobj         17.439    17.439    17.439
qmin           36.210    36.159    36.303
qmax           46.775    46.854    46.803
amean          41.402    41.394    41.374
amin           41.071    41.060    41.038
amax           41.758    41.775    41.741
emean           0.104     0.105     0.103
emin            0.089     0.090     0.089
emax            0.121     0.123     0.122
imean          18.281    18.266    18.260
imin           17.557    17.558    17.558
imax           19.042    19.022    19.024
excite_mean     0.331     0.331     0.330
fracstop        1.000     1.000     1.000
cjmean          2.942     2.942     2.942

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       178.9     179.4     179.6
kozaiamp        180.0     179.9     180.0