Orbit Fit and Astrometric record for 15RD279

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: 15RD279   
# Created Sun Apr 21 01:10:10 2019
# 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:
   0.000018   0.036029  -0.000044   0.009450   0.030462   0.000000
# Chi-squared of fit:    10.13 DOF:   50 RMS:  0.11
# Min/Max residuals:    -0.30    0.33
# Exact a, adot, b, bdot, g, gdot:
  1.838135E-05  3.449903E-02  5.557193E-06  9.070576E-03  2.929150E-02 -7.308994E-03
# Covariance matrix:
  1.8113E-13  4.1789E-14 -1.3363E-14  2.8636E-14  1.6614E-13  1.4958E-12
  4.1789E-14  6.4626E-13 -6.2702E-14  1.9540E-13  4.7996E-13  9.9922E-12
 -1.3363E-14 -6.2702E-14  1.1715E-13 -1.0156E-13 -5.4616E-14 -1.1614E-12
  2.8636E-14  1.9540E-13 -1.0156E-13  1.7772E-13  1.5275E-13  3.8304E-12
  1.6614E-13  4.7996E-13 -5.4616E-14  1.5275E-13  5.0376E-13  7.8533E-12
  1.4958E-12  9.9922E-12 -1.1614E-12  3.8304E-12  7.8533E-12  1.9537E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.760149    8.833944    1.008603   -0.005930    0.124948  2457197.060258
# Heliocentric elements and errors
Epoch:              2457190.5000  =  2015/06/17
Mean Anomaly:          338.93633 +/-     0.019
Argument of Peri:       59.66240 +/-     0.049
Long of Asc Node:      356.87015 +/-     0.000
Inclination:            15.18913 +/-     0.001
Eccentricity:         0.39359008 +/-    0.0004
Semi-Major Axis:     50.65317257 +/-    0.0188
Time of Perihelion: 2464894.9197 +/-       5.2
Perihelion:          30.71658638 +/-    0.0222
Aphelion:            70.58975876 +/-    0.0323
Period (y)              360.5107 +/-      0.20
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           33.72325440 +/-    0.0008
Ecliptic Y            4.22139623 +/-    0.0001
Ecliptic Z            1.64424223 +/-    0.0000
Ecliptic XDOT        -0.00121229 +/-    0.0000
Ecliptic YDOT         0.00306904 +/-    0.0000
Ecliptic ZDOT         0.00081400 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   34.02619000 +/-    0.0008
Geocenter to KBO     34.13959853 +/-    0.0008
# Hcoef:  9.40

The following table shows the complete astrometric record for 15RD279. 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 (15RD279) followed by the observatory code and reference code for the source of the astrometry.

2015 06  23.55948  00 28 05.396  +06 02 18.80  25.0r 15RD279   568  C~2lVT      
2015 07  14.60417  00 28 18.846  +06 07 37.26  24.5r 15RD279   568  C~2lVT      
2015 07  19.58328  00 28 15.185  +06 08 08.60  24.8r 15RD279   568  C~2lVT      
2015 08  13.47579  00 27 20.009  +06 06 38.27  24.7r 15RD279   568  C~2lVT      
2015 08  20.41299  00 26 54.776  +06 05 03.93  24.5r 15RD279   568  C~2lVT      
2015 08  20.46234  00 26 54.549  +06 05 03.02  24.5r 15RD279   568  C~2lVT      
2015 09  07.55863  00 25 33.123  +05 59 00.78  24.8w 15RD279   568  C~2lVT      
2015 09  09.38473  00 25 23.932  +05 58 16.34  24.7r 15RD279   568  C~2lVT      
2015 09  09.42909  00 25 23.706  +05 58 15.21  24.5r 15RD279   568  C~2lVT      
2015 09  09.47005  00 25 23.497  +05 58 14.22  24.4r 15RD279   568  C~2lVT      
2015 09  10.49367  00 25 18.260  +05 57 48.66  24.8w 15RD279   568  C~2lVT      
2015 09  18.45161  00 24 36.364  +05 54 18.67  24.8w 15RD279   568  C~2lVT      
2015 10  08.33928  00 22 47.281  +05 44 36.29  24.8w 15RD279   568  C~2lVT      
2015 10  08.39191  00 22 46.988  +05 44 34.69  24.9w 15RD279   568  C~2lVT      
2015 10  09.30895  00 22 41.994  +05 44 06.97  24.6w 15RD279   568  C~2lVT      
2015 12  08.23353  00 18 58.348  +05 22 07.00  24.9w 15RD279   568  C~2lVT      
2016 09  05.59522  00 32 22.503  +07 17 58.32        15RD279   568  C~2lVT      
2016 09  06.54431  00 32 17.831  +07 17 37.03        15RD279   568  C~2lVT      
2016 09  06.58642  00 32 17.632  +07 17 35.99        15RD279   568  C~2lVT      
2016 09  27.50093  00 30 26.093  +07 08 23.59  24.8w 15RD279   568  C~2lVT      
2016 10  30.35674  00 27 31.449  +06 52 06.52        15RD279   568  C~2lVT      
2016 11  03.31592  00 27 13.367  +06 50 18.97        15RD279   568  C~2lVT      
2016 11  03.36828  00 27 13.135  +06 50 17.36        15RD279   568  C~2lVT      
2016 12  25.22839  00 25 25.780  +06 38 32.47  24.6w 15RD279   568  C~2lVT      
2017 01  02.27514  00 25 35.230  +06 39 21.00  24.6w 15RD279   568  C~2lVT      
2017 01  29.23654  00 26 58.787  +06 47 46.45  24.9w 15RD279   568  C~2lVT      
2017 09  16.52796  00 38 20.115  +08 33 09.82  24.6w 15RD279   568  C~2lVT      
2017 09  22.48140  00 37 47.752  +08 30 32.24        15RD279   568  C~2lVT      

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     0.05       0.00    -0.14
  2   0.0576    310.14    -0.01     213.25    -0.00
  3   0.0712    272.37     0.01     263.62    -0.00
  4   0.1394   -519.22     0.20     506.01     0.33
  5   0.1584   -902.19     0.20     568.28    -0.04
  6   0.1585   -905.66    -0.27     568.79    -0.00
  7   0.2081  -2164.51    -0.14     717.22    -0.01
  8   0.2131  -2308.03    -0.09     730.77     0.05
  9   0.2132  -2311.57    -0.06     731.07    -0.00
 10   0.2133  -2314.83    -0.00     731.39    -0.00
 11   0.2161  -2396.70    -0.10     738.90    -0.00
 12   0.2379  -3053.92     0.13     794.03     0.01
 13   0.2923  -4779.79     0.06     905.97    -0.05
 14   0.2925  -4784.44     0.05     906.24    -0.06
 15   0.2950  -4863.89    -0.07     910.43    -0.06
 16   0.4591  -8456.20     0.02    1029.46     0.03
 17   1.2048   5311.45    -0.13    2662.22    -0.06
 18   1.2074   5239.12    -0.02    2669.97     0.03
 19   1.2075   5235.98     0.14    2670.18    -0.12
 20   1.2647   3491.80     0.04    2815.75    -0.02
 21   1.3547    716.58    -0.06    2944.54    -0.13
 22   1.3655    426.68     0.05    2952.28     0.17
 23   1.3657    422.87     0.05    2952.17    -0.06
 24   1.5076  -1324.93     0.11    2938.28    -0.08
 25   1.5297  -1176.41     0.12    2927.02     0.09
 26   1.6035    166.87    -0.30    2898.12     0.11
 27   2.2340  11981.04    -0.01    4737.46     0.02
 28   2.2503  11475.80     0.02    4779.44    -0.01

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.

15RD279    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        51.331    51.368    51.294
ecceobj         0.400     0.401     0.399
incobj         15.125    15.125    15.125
qmin           28.982    29.964    29.573
qmax           72.669    78.920    88.075
amean          50.121    50.982    54.136
amin           46.700    50.402    50.338
amax           51.976    54.770    59.122
emean           0.382     0.398     0.427
emin            0.336     0.385     0.377
emax            0.404     0.446     0.491
imean          15.854    15.473    15.183
imin           13.695    14.431    13.054
imax           17.714    16.070    17.620
excite_mean     0.470     0.479     0.502
fracstop        0.349     0.224     0.469
cjmean          2.895     2.892     2.893

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       166.3     123.2     187.8
kozaiamp        179.8      72.5     179.9