Orbit Fit and Astrometric record for 15RT277

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: 15RT277   
# Created Sun Apr 21 01:10:09 2019
# Orbit generated from Bernstein formalism
# Fitting   26 observations of   26
# Arc:   2.43y
# First observation: 2015/07/19
#  Last observation: 2017/12/23
Preliminary a, adot, b, bdot, g, gdot:
  -0.000186   0.023510  -0.000009  -0.002213   0.024684   0.000000
# Chi-squared of fit:    14.24 DOF:   46 RMS:  0.13
# Min/Max residuals:    -0.35    0.30
# Exact a, adot, b, bdot, g, gdot:
  1.546060E-05  2.336199E-02 -1.534996E-06 -2.240652E-03  2.469460E-02  4.693901E-03
# Covariance matrix:
  2.9397E-13  1.1637E-13  3.8966E-15 -2.1550E-14  2.8934E-13  4.7431E-12
  1.1637E-13  3.6158E-13  1.0600E-14 -5.2947E-14  3.6273E-13  1.1501E-11
  3.8966E-15  1.0600E-14  1.1175E-13 -7.9772E-14  1.3110E-14  8.6831E-13
 -2.1550E-14 -5.2947E-14 -7.9772E-14  1.2378E-13 -6.6443E-14 -4.1331E-12
  2.8934E-13  3.6273E-13  1.3110E-14 -6.6443E-14  5.2040E-13  1.4461E-11
  4.7431E-12  1.1501E-11  8.6831E-13 -4.1331E-12  1.4461E-11  8.9168E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.370885   10.514081    0.978213    0.001914   -0.280188  2457223.007519
# Heliocentric elements and errors
Epoch:              2457220.5000  =  2015/07/17
Mean Anomaly:           91.40203 +/-     0.203
Argument of Peri:       65.15111 +/-     0.150
Long of Asc Node:      192.99126 +/-     0.000
Inclination:             5.46743 +/-     0.001
Eccentricity:         0.17514086 +/-    0.0011
Semi-Major Axis:     39.43522259 +/-    0.0164
Time of Perihelion: 2434254.8770 +/-      49.0
Perihelion:          32.52850361 +/-    0.0453
Aphelion:            46.34194157 +/-    0.0474
Period (y)              247.6479 +/-      0.15
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           40.26435839 +/-    0.0012
Ecliptic Y            6.47884197 +/-    0.0002
Ecliptic Z            0.26211774 +/-    0.0000
Ecliptic XDOT         0.00003836 +/-    0.0000
Ecliptic YDOT         0.00263558 +/-    0.0000
Ecliptic ZDOT        -0.00024498 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.78311729 +/-    0.0012
Geocenter to KBO     40.49468973 +/-    0.0012
# Hcoef:  8.56

The following table shows the complete astrometric record for 15RT277. 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 (15RT277) followed by the observatory code and reference code for the source of the astrometry.

2015 07  19.50673  00 38 04.240  +04 30 13.16  24.7r 15RT277   568  C~2lVN      
2015 08  11.49525  00 37 27.623  +04 26 00.09  24.3r 15RT277   568  C~2lVN      
2015 08  11.53687  00 37 27.523  +04 25 59.50  24.5r 15RT277   568  C~2lVN      
2015 09  08.40090  00 35 53.211  +04 15 28.56  24.4r 15RT277   568  C~2lVN      
2015 09  08.50503  00 35 52.773  +04 15 25.72  24.4r 15RT277   568  C~2lVN      
2015 09  08.54864  00 35 52.576  +04 15 24.50  24.5r 15RT277   568  C~2lVN      
2015 09  09.52421  00 35 48.535  +04 14 57.52  24.5w 15RT277   568  C~2lVO      
2015 09  10.46510  00 35 44.609  +04 14 31.31  24.6w 15RT277   568  C~2lVO      
2015 10  03.37987  00 34 02.086  +04 03 06.15  25.2w 15RT277   568  C~2lVO      
2015 10  07.34557  00 33 43.855  +04 01 03.68  24.2r 15RT277   568  C~2lVO      
2015 10  07.36748  00 33 43.728  +04 01 02.52  23.9r 15RT277   568  C~2lVO      
2015 10  07.40358  00 33 43.577  +04 01 01.54  25.8r 15RT277   568  C~2lVO      
2015 11  07.24449  00 31 33.890  +03 46 21.14  24.9w 15RT277   568  C~2lVO      
2015 11  07.29726  00 31 33.692  +03 46 19.75  24.6w 15RT277   568  C~2lVO      
2015 12  07.32092  00 30 18.408  +03 37 22.22  24.9w 15RT277   568  C~2lVO      
2016 01  01.24995  00 30 14.539  +03 36 10.39  24.8w 15RT277   568  C~2lVO      
2016 09  26.57954  00 39 42.532  +04 30 59.97  24.7w 15RT277   568  C~2lVO      
2016 11  04.28299  00 36 53.552  +04 12 05.58  24.8w 15RT277   568  C~2lVO      
2016 11  04.34222  00 36 53.329  +04 12 04.27  24.7w 15RT277   568  C~2lVO      
2016 12  29.26158  00 35 17.997  +04 00 24.93  24.4w 15RT277   568  C~2lVO      
2017 01  03.23211  00 35 22.478  +04 00 44.99  24.9w 15RT277   568  C~2lVO      
2017 01  27.23800  00 36 15.620  +04 05 45.94  24.8w 15RT277   568  C~2lVO      
2017 01  28.23385  00 36 18.891  +04 06 05.20  24.7w 15RT277   568  C~2lVO      
2017 01  30.24057  00 36 25.735  +04 06 45.98        15RT277   568  C~2lVO      
2017 11  22.37200  00 41 04.259  +04 29 55.66  25.0w 15RT277   568  C~2lVO      
2017 12  23.29716  00 40 20.073  +04 24 29.67  25.1w 15RT277   568  C~2lVO      

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    -0.10       0.00     0.02
  2   0.0629   -602.97    -0.04     -17.90    -0.06
  3   0.0631   -604.58     0.11     -17.85    -0.00
  4   0.1393  -2149.72     0.28     -44.09    -0.07
  5   0.1396  -2156.86     0.27     -44.13    -0.05
  6   0.1397  -2160.05     0.08     -44.09     0.01
  7   0.1424  -2226.25    -0.02     -45.14    -0.00
  8   0.1450  -2290.56    -0.05     -46.16     0.01
  9   0.2077  -3970.63    -0.27     -72.92     0.22
 10   0.2186  -4269.73     0.18     -78.15     0.17
 11   0.2186  -4271.93    -0.35     -78.46    -0.14
 12   0.2187  -4274.39    -0.05     -78.48    -0.12
 13   0.3032  -6406.53     0.11    -123.24     0.00
 14   0.3033  -6409.81    -0.01    -123.35    -0.05
 15   0.3855  -7658.83    -0.09    -172.95     0.06
 16   0.4538  -7740.50     0.08    -216.14     0.09
 17   1.1912   1370.52    -0.22    -533.19    -0.07
 18   1.2971  -1399.31    -0.07    -585.35    -0.13
 19   1.2973  -1402.90     0.06    -585.25     0.03
 20   1.4477  -2989.47     0.01    -667.97     0.13
 21   1.4613  -2919.92     0.04    -675.89    -0.18
 22   1.5270  -2070.36    -0.06    -711.61     0.00
 23   1.5297  -2017.78    -0.13    -713.12    -0.05
 24   1.5352  -1907.59     0.11    -715.84     0.16
 25   2.3460   2469.98    -0.16   -1070.97    -0.07
 26   2.4306   1734.22     0.30   -1112.24     0.09

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.

15RT277    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.785    39.833    39.737
ecceobj         0.174     0.177     0.171
incobj          5.440     5.440     5.440
qmin           31.826    31.739    31.851
qmax           47.733    47.921    47.682
amean          39.457    39.458    39.457
amin           38.952    38.904    39.002
amax           40.010    40.081    39.982
emean           0.176     0.177     0.175
emin            0.158     0.154     0.156
emax            0.194     0.197     0.193
imean           6.153     6.242     5.956
imin            5.506     4.870     5.385
imax            6.737     7.483     6.569
excite_mean     0.207     0.208     0.204
fracstop        1.000     1.000     1.000
cjmean          3.003     3.002     3.005

libcent 0       180.1     180.4     180.3
libamp  0       109.8     132.4      94.4
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       175.2     185.2     181.6
kozaiamp        180.0     180.0     180.0