Orbit Fit and Astrometric record for 15RO278

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: 15RO278   
# Created Wed Feb 20 02:10:35 2019
# Orbit generated from Bernstein formalism
# Fitting   30 observations of   30
# Arc:   2.25y
# First observation: 2015/06/23
#  Last observation: 2017/09/22
Preliminary a, adot, b, bdot, g, gdot:
  -0.000123   0.030104  -0.000009  -0.014205   0.028602   0.000000
# Chi-squared of fit:     6.91 DOF:   54 RMS:  0.08
# Min/Max residuals:    -0.27    0.28
# Exact a, adot, b, bdot, g, gdot:
  1.533792E-05  2.941624E-02 -7.504027E-06 -1.398040E-02  2.812885E-02  3.938144E-03
# Covariance matrix:
  1.5579E-13  2.9258E-14  4.7382E-15 -3.8568E-14  1.4012E-13  1.4446E-12
  2.9258E-14  5.0640E-13  4.7955E-14 -2.6150E-13  3.5320E-13  9.5379E-12
  4.7382E-15  4.7955E-14  9.5289E-14 -1.0223E-13  3.4011E-14  1.2813E-12
 -3.8568E-14 -2.6150E-13 -1.0223E-13  2.9337E-13 -2.0129E-13 -6.7391E-12
  1.4012E-13  3.5320E-13  3.4011E-14 -2.0129E-13  3.8133E-13  7.3890E-12
  1.4446E-12  9.5379E-12  1.2813E-12 -6.7391E-12  7.3890E-12  2.4507E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.988889    8.296890    1.009724   -0.003922    0.115634  2457197.056068
# Heliocentric elements and errors
Epoch:              2457190.5000  =  2015/06/17
Mean Anomaly:           17.57663 +/-     0.068
Argument of Peri:      146.55293 +/-     0.120
Long of Asc Node:      190.86988 +/-     0.000
Inclination:            25.40435 +/-     0.001
Eccentricity:         0.23546136 +/-    0.0003
Semi-Major Axis:     45.27011761 +/-    0.0076
Time of Perihelion: 2451758.6357 +/-      20.9
Perihelion:          34.61075433 +/-    0.0148
Aphelion:            55.92948088 +/-    0.0166
Period (y)              304.5970 +/-      0.08
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           35.18514072 +/-    0.0008
Ecliptic Y            4.11149896 +/-    0.0001
Ecliptic Z            1.23360292 +/-    0.0000
Ecliptic XDOT         0.00001018 +/-    0.0000
Ecliptic YDOT         0.00288905 +/-    0.0000
Ecliptic ZDOT        -0.00134656 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   35.44601991 +/-    0.0008
Geocenter to KBO     35.55068498 +/-    0.0008
# Hcoef:  8.73

The following table shows the complete astrometric record for 15RO278. 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 (15RO278) followed by the observatory code and reference code for the source of the astrometry.

2015 06  23.55529  00 27 20.039  +05 07 04.86  24.3r 15RO278   568  C~2lVR      
2015 07  14.60008  00 27 36.928  +05 07 09.20  24.1r 15RO278   568  C~2lVR      
2015 07  19.57915  00 27 34.387  +05 06 27.29  24.4r 15RO278   568  C~2lVR      
2015 08  13.47170  00 26 46.546  +04 59 00.64  23.6r 15RO278   568  C~2lVR      
2015 08  13.52517  00 26 46.380  +04 58 59.60  24.3r 15RO278   568  C~2lVR      
2015 08  19.57540  00 26 26.766  +04 56 15.26  24.1r 15RO278   568  C~2lVR      
2015 08  19.60440  00 26 26.656  +04 56 14.70  24.2r 15RO278   568  C~2lVR      
2015 08  20.40889  00 26 23.866  +04 55 51.43  24.3r 15RO278   568  C~2lVR      
2015 08  20.45757  00 26 23.697  +04 55 50.09  24.4r 15RO278   568  C~2lVR      
2015 09  07.55453  00 25 09.760  +04 45 49.14  24.5w 15RO278   568  C~2lVR      
2015 09  09.38065  00 25 01.381  +04 44 41.38  24.0r 15RO278   568  C~2lVR      
2015 09  09.42501  00 25 01.174  +04 44 39.67  24.2r 15RO278   568  C~2lVR      
2015 09  09.46595  00 25 00.982  +04 44 38.22  24.2r 15RO278   568  C~2lVR      
2015 09  10.48959  00 24 56.212  +04 43 59.78  24.3w 15RO278   568  C~2lVR      
2015 09  18.44605  00 24 17.973  +04 38 50.85  24.3w 15RO278   568  C~2lVR      
2015 10  08.33404  00 22 38.419  +04 25 15.00  24.2w 15RO278   568  C~2lVR      
2015 10  08.38664  00 22 38.150  +04 25 12.81  24.2w 15RO278   568  C~2lVR      
2015 10  09.30372  00 22 33.605  +04 24 34.89  24.1w 15RO278   568  C~2lVR      
2015 11  10.35841  00 20 14.849  +04 04 09.64  24.4w 15RO278   568  C~2lVR      
2015 12  07.30512  00 19 14.979  +03 52 35.32  24.5w 15RO278   568  C~2lVR      
2016 01  01.23433  00 19 25.103  +03 48 49.62  24.2w 15RO278   568  C~2lVR      
2016 09  06.42437  00 32 51.729  +04 41 41.77        15RO278   568  C~2lVR      
2016 09  06.46487  00 32 51.545  +04 41 40.28        15RO278   568  C~2lVR      
2016 10  30.34865  00 28 33.154  +04 06 05.50        15RO278   568  C~2lVR      
2016 11  03.30427  00 28 16.963  +04 03 43.11        15RO278   568  C~2lVR      
2016 11  03.35669  00 28 16.759  +04 03 41.15        15RO278   568  C~2lVR      
2017 01  02.26396  00 26 55.737  +03 44 58.46  24.3w 15RO278   568  C~2lVR      
2017 01  29.24345  00 28 18.909  +03 49 29.60  24.0w 15RO278   568  C~2lVR      
2017 09  15.44947  00 39 48.669  +04 31 35.51  24.3w 15RO278   568  C~2lVR      
2017 09  22.51463  00 39 14.587  +04 26 57.64  24.1w 15RO278   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     0.25       0.00    -0.07
  2   0.0576    233.51     0.04     -95.72     0.03
  3   0.0712    182.07     0.07    -119.22    -0.00
  4   0.1394   -651.10    -0.22    -246.96    -0.02
  5   0.1395   -653.79    -0.10    -246.94     0.28
  6   0.1561   -988.00    -0.11    -281.98    -0.27
  7   0.1562   -989.73    -0.10    -281.84     0.02
  8   0.1584  -1037.23    -0.02    -286.72    -0.04
  9   0.1585  -1040.08     0.10    -286.96    -0.01
 10   0.2081  -2292.85    -0.03    -401.54     0.02
 11   0.2131  -2434.72    -0.06    -414.17     0.01
 12   0.2132  -2438.24    -0.04    -414.52    -0.05
 13   0.2133  -2441.45     0.01    -414.71     0.01
 14   0.2161  -2522.16     0.02    -421.77     0.03
 15   0.2379  -3169.56    -0.03    -479.00     0.03
 16   0.2923  -4860.32     0.05    -637.83    -0.02
 17   0.2925  -4864.89     0.01    -638.24    -0.02
 18   0.2950  -4942.37     0.04    -646.09     0.03
 19   0.3828  -7336.08     0.09    -946.57     0.06
 20   0.4565  -8435.82    -0.08   -1227.77     0.04
 21   0.5248  -8386.52     0.06   -1495.34    -0.02
 22   1.2070   3956.03     0.07   -3354.68     0.01
 23   1.2071   3952.92     0.06   -3354.96    -0.01
 24   1.3547   -441.17    -0.02   -3794.02    -0.06
 25   1.3655   -720.01    -0.05   -3829.21     0.04
 26   1.3656   -723.59     0.04   -3829.81    -0.11
 27   1.5297  -2281.46    -0.04   -4382.44    -0.04
 28   1.6035  -1030.40     0.01   -4625.22     0.18
 29   2.2311   9461.80    -0.06   -6362.45    -0.04
 30   2.2504   8882.67     0.03   -6418.58     0.00

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.

15RO278    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        45.745    45.775    45.714
ecceobj         0.243     0.244     0.242
incobj         25.307    25.307    25.307
qmin           33.148    33.554    33.311
qmax           58.395    57.902    58.168
amean          45.491    45.491    45.491
amin           45.097    45.083    45.089
amax           45.958    45.978    45.992
emean           0.237     0.236     0.242
emin            0.202     0.208     0.216
emax            0.271     0.260     0.266
imean          25.358    25.392    25.213
imin           24.570    24.867    24.482
imax           26.164    26.053    25.892
excite_mean     0.490     0.490     0.490
fracstop        1.000     1.000     1.000
cjmean          2.820     2.820     2.820

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       200.2     203.6     195.8
kozaiamp        179.9     180.0     180.0