Orbit Fit and Astrometric record for 15RW277

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: 15RW277   
# Created Tue Apr 23 01:10:44 2019
# Orbit generated from Bernstein formalism
# Fitting   25 observations of   25
# Arc:   1.53y
# First observation: 2015/06/23
#  Last observation: 2017/01/02
Preliminary a, adot, b, bdot, g, gdot:
  -0.000094   0.031333   0.000064   0.018243   0.032887   0.000000
# Chi-squared of fit:    12.54 DOF:   44 RMS:  0.13
# Min/Max residuals:    -0.33    0.32
# Exact a, adot, b, bdot, g, gdot:
  1.658443E-05  3.018690E-02  8.198444E-06  1.782294E-02  3.187814E-02 -1.279697E-03
# Covariance matrix:
  3.9934E-13  2.7067E-13 -1.0578E-13  4.7591E-13  6.2669E-13  1.6288E-11
  2.7067E-13  7.3393E-13 -1.5279E-13  6.8230E-13  9.2038E-13  2.3356E-11
 -1.0578E-13 -1.5279E-13  1.8832E-13 -3.6322E-13 -2.5813E-13 -8.4575E-12
  4.7591E-13  6.8230E-13 -3.6322E-13  1.3771E-12  1.1713E-12  4.1407E-11
  6.2669E-13  9.2038E-13 -2.5813E-13  1.1713E-12  1.4995E-12  4.0077E-11
  1.6288E-11  2.3356E-11 -8.4575E-12  4.1407E-11  4.0077E-11  1.4140E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.917093    8.079451    1.010197   -0.005578    0.111334  2457197.079268
# Heliocentric elements and errors
Epoch:              2457190.5000  =  2015/06/17
Mean Anomaly:          239.78889 +/-     0.456
Argument of Peri:      133.27695 +/-     0.445
Long of Asc Node:        1.32428 +/-     0.000
Inclination:            30.88761 +/-     0.001
Eccentricity:         0.07857599 +/-    0.0008
Semi-Major Axis:     29.95784849 +/-    0.0046
Time of Perihelion: 2477189.4158 +/-      75.7
Perihelion:          27.60388087 +/-    0.0251
Aphelion:            32.31181610 +/-    0.0252
Period (y)              163.9737 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           31.04596215 +/-    0.0012
Ecliptic Y            3.38766714 +/-    0.0002
Ecliptic Z            1.59673338 +/-    0.0001
Ecliptic XDOT        -0.00055264 +/-    0.0000
Ecliptic YDOT         0.00253425 +/-    0.0000
Ecliptic ZDOT         0.00152321 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   31.27103471 +/-    0.0012
Geocenter to KBO     31.36946107 +/-    0.0012
# Hcoef: 10.29

The following table shows the complete astrometric record for 15RW277. 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 (15RW277) followed by the observatory code and reference code for the source of the astrometry.

2015 06  23.57849  00 25 03.408  +05 53 04.54  26.1r 15RW277   568  C~2lVO      
2015 06  23.58498  00 25 03.455  +05 53 04.57  25.2r 15RW277   568  C~2lVO      
2015 08  20.40327  00 23 18.978  +05 58 13.00  25.0r 15RW277   568  C~2lVO      
2015 08  20.45053  00 23 18.759  +05 58 12.22  25.1r 15RW277   568  C~2lVO      
2015 09  07.55043  00 21 41.920  +05 52 19.01  25.3w 15RW277   568  C~2lVO      
2015 09  09.37654  00 21 31.144  +05 51 34.83  24.9r 15RW277   568  C~2lVO      
2015 09  09.42093  00 21 30.874  +05 51 33.72  25.0r 15RW277   568  C~2lVO      
2015 09  09.46188  00 21 30.621  +05 51 32.66  24.9r 15RW277   568  C~2lVO      
2015 09  10.48550  00 21 24.491  +05 51 07.31  25.2w 15RW277   568  C~2lVO      
2015 09  18.44074  00 20 35.524  +05 47 37.28  26.2w 15RW277   568  C~2lVO      
2015 09  18.48843  00 20 35.224  +05 47 35.76  24.8w 15RW277   568  C~2lVO      
2015 10  08.32880  00 18 29.125  +05 37 50.37  25.1w 15RW277   568  C~2lVO      
2015 10  08.38143  00 18 28.781  +05 37 48.88  25.2w 15RW277   568  C~2lVO      
2015 10  09.29850  00 18 23.022  +05 37 20.85  25.1w 15RW277   568  C~2lVO      
2016 09  05.58714  00 26 44.250  +07 33 35.85        15RW277   568  C~2lVO      
2016 09  06.53623  00 26 38.740  +07 33 14.98        15RW277   568  C~2lVO      
2016 09  06.57833  00 26 38.491  +07 33 14.00        15RW277   568  C~2lVO      
2016 09  27.49284  00 24 28.553  +07 24 04.63  25.1w 15RW277   568  C~2lVO      
2016 10  30.32669  00 21 08.527  +07 07 37.04        15RW277   568  C~2lVO      
2016 11  02.28217  00 20 53.016  +07 06 15.04        15RW277   568  C~2lVO      
2016 11  03.27521  00 20 47.961  +07 05 47.97        15RW277   568  C~2lVO      
2016 11  03.32774  00 20 47.685  +07 05 46.76        15RW277   568  C~2lVO      
2016 12  24.22613  00 18 40.979  +06 54 38.65  25.3w 15RW277   568  C~2lVO      
2016 12  24.24532  00 18 41.029  +06 54 38.85  26.4w 15RW277   568  C~2lVO      
2017 01  02.22668  00 18 50.467  +06 55 50.78  24.4w 15RW277   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    -0.33       0.00     0.13
  2   0.0000      0.66     0.14      -0.25    -0.22
  3   0.1583  -1308.31     0.10     900.65     0.05
  4   0.1584  -1311.62     0.17     901.23    -0.08
  5   0.2080  -2778.12    -0.23    1150.65     0.05
  6   0.2130  -2943.27     0.10    1174.00    -0.01
  7   0.2131  -2947.41     0.08    1174.58    -0.02
  8   0.2132  -2951.29     0.01    1175.11    -0.05
  9   0.2160  -3045.33     0.10    1188.20    -0.01
 10   0.2378  -3799.54    -0.05    1286.05     0.22
 11   0.2379  -3804.25    -0.07    1286.44     0.01
 12   0.2923  -5764.94     0.07    1499.02    -0.07
 13   0.2924  -5770.25     0.02    1499.70     0.07
 14   0.2949  -5860.34    -0.08    1508.27    -0.04
 15   1.2047   3766.42    -0.01    4946.79     0.01
 16   1.2073   3682.86     0.03    4959.98    -0.01
 17   1.2074   3679.07     0.03    4960.54    -0.05
 18   1.2647   1686.00    -0.00    5220.52    -0.04
 19   1.3545  -1438.91     0.06    5495.66     0.22
 20   1.3626  -1683.45    -0.14    5512.29     0.04
 21   1.3654  -1763.29    -0.08    5517.40    -0.22
 22   1.3655  -1767.54    -0.06    5517.93    -0.01
 23   1.5049  -3765.10    -0.31    5656.95     0.12
 24   1.5049  -3764.34     0.32    5656.83    -0.03
 25   1.5295  -3606.67     0.13    5666.73    -0.06

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.

15RW277    quality flag:3

Type:            1:1       1:1       1:1

axisobj        30.134    30.139    30.130
ecceobj         0.074     0.074     0.074
incobj         30.757    30.758    30.756
qmin           27.009    26.977    26.985
qmax           33.384    33.425    33.319
amean          30.109    30.109    30.109
amin           29.755    29.763    29.760
amax           30.480    30.470    30.496
emean           0.069     0.069     0.068
emin            0.040     0.038     0.038
emax            0.097     0.098     0.098
imean          31.194    31.195    31.190
imin           30.925    30.924    30.935
imax           31.457    31.447    31.458
excite_mean     0.523     0.523     0.523
fracstop        1.000     1.000     1.000
cjmean          2.707     2.707     2.707

libcent 0        64.5      63.9      64.3
libamp  0        32.3      32.2      32.9
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       174.2     174.3     174.2
kozaiamp        180.0     180.0     180.0