Orbit Fit and Astrometric record for 15BQ518

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: 15BQ518   
# Created Tue Apr 23 01:10:35 2019
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   70 observations of   70
# Arc:   6.22y
# First observation: 2012/01/20
#  Last observation: 2018/04/10
# Chi-squared of fit:    37.00 DOF:  134 RMS:  0.13
# Min/Max residuals:    -0.63    0.50
# Exact a, adot, b, bdot, g, gdot:
  1.477576E-05  2.288278E-02 -2.058287E-06 -2.824178E-03  2.411031E-02  1.466467E-03
# Covariance matrix:
  1.6189E-13 -7.4718E-14 -4.9525E-15  6.3478E-15 -1.5852E-15 -4.2275E-13
 -7.4718E-14  8.6699E-14  9.1569E-15 -1.1181E-14  4.1037E-14  7.3651E-13
 -4.9525E-15  9.1569E-15  1.3401E-13 -3.3675E-14  5.1037E-15  8.7034E-14
  6.3478E-15 -1.1181E-14 -3.3675E-14  1.1032E-14 -5.1377E-15 -1.0727E-13
 -1.5852E-15  4.1037E-14  5.1037E-15 -5.1377E-15  9.7878E-14  3.2167E-13
 -4.2275E-13  7.3651E-13  8.7034E-14 -1.0727E-13  3.2167E-13  7.0813E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
  -14.609155  154.629461    0.561678   -0.203876   -0.782277  2455946.982176
# Heliocentric elements and errors
Epoch:              2455946.5000  =  2012/01/20
Mean Anomaly:          106.68429 +/-     0.070
Argument of Peri:      131.21651 +/-     0.065
Long of Asc Node:      270.92574 +/-     0.001
Inclination:            16.01182 +/-     0.000
Eccentricity:         0.05510372 +/-    0.0001
Semi-Major Axis:     41.49120620 +/-    0.0020
Time of Perihelion: 2427017.6955 +/-      19.1
Perihelion:          39.20488652 +/-    0.0046
Aphelion:            43.77752588 +/-    0.0047
Period (y)              267.2651 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -36.75113072 +/-    0.0005
Ecliptic Y           18.05143771 +/-    0.0002
Ecliptic Z          -10.46135314 +/-    0.0001
Ecliptic XDOT        -0.00119031 +/-    0.0000
Ecliptic YDOT        -0.00230898 +/-    0.0000
Ecliptic ZDOT        -0.00035224 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.26034993 +/-    0.0004
Geocenter to KBO     41.47601793 +/-    0.0005
# Hcoef:  5.92

The following table shows the complete astrometric record for 15BQ518. 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 (15BQ518) followed by the observatory code and reference code for the source of the astrometry.

2012 01  20.48141  10 04 47.285  -03 48 43.75  22.1w 15BQ518   F51  C~1vYB      
2012 01  20.49450  10 04 47.226  -03 48 43.83  22.2w 15BQ518   F51  C~1vYB      
2012 01  20.50753  10 04 47.184  -03 48 43.55  22.4w 15BQ518   F51  C~1vYB      
2012 01  20.52057  10 04 47.126  -03 48 43.51  22.3w 15BQ518   F51  C~1vYB      
2012 03  21.29722  10 00 19.324  -03 26 33.55  22.3w 15BQ518   F51  C~1vYB      
2012 03  21.31111  10 00 19.268  -03 26 32.91  22.1w 15BQ518   F51  C~1vYB      
2012 03  21.32503  10 00 19.234  -03 26 32.27  22.1w 15BQ518   F51  C~1vYB      
2012 03  21.33897  10 00 19.170  -03 26 31.98  22.0w 15BQ518   F51  C~1vYB      
2013 02  03.48080  10 08 25.271  -04 23 10.21  22.0G 15BQ518   F51  C~2r7a      
2014 01  24.52671  10 13 49.617  -05 02 28.43  22.1G 15BQ518   F51  C~2r7a      
2014 01  25.48000  10 13 45.762  -05 02 19.71  21.2G 15BQ518   F51  C~2r7a      
2014 02  22.49410  10 11 40.314  -04 54 10.40  22.5G 15BQ518   F51  C~2r7a      
2014 12  08.64714  10 20 23.640  -05 34 05.45  21.8G 15BQ518   F51  C~2r7a      
2015 01  24.54731  10 18 31.062  -05 39 28.07  22.5w 15BQ518   F51  C~1vYB      
2015 01  24.57004  10 18 30.983  -05 39 27.52  22.4w 15BQ518   F51  C~1vYB      
2015 01  24.59200  10 18 30.875  -05 39 27.61  22.0w 15BQ518   F51  C~1vYB      
2015 01  26.45070  10 18 23.436  -05 39 11.20  22.4G 15BQ518   F51  C~2r7a      
2015 01  26.46209  10 18 23.365  -05 39 10.97  22.2G 15BQ518   F51  C~2r7a      
2015 01  26.47344  10 18 23.326  -05 39 10.80  22.1G 15BQ518   F51  C~2r7a      
2015 01  26.48481  10 18 23.280  -05 39 10.75  22.2G 15BQ518   F51  C~2r7a      
2015 02  20.42149  10 16 32.668  -05 32 15.55  22.1w 15BQ518   F51  C~1vYB      
2015 02  20.43447  10 16 32.609  -05 32 15.32  22.2w 15BQ518   F51  C~1vYB      
2015 02  20.44716  10 16 32.554  -05 32 14.93  22.0w 15BQ518   F51  C~1vYB      
2015 02  20.45984  10 16 32.489  -05 32 14.50  22.2w 15BQ518   F51  C~1vYB      
2015 02  22.39578  10 16 23.489  -05 31 29.21  21.8G 15BQ518   F51  C~2r7a      
2015 02  22.40870  10 16 23.448  -05 31 29.01  21.8G 15BQ518   F51  C~2r7a      
2015 02  22.42194  10 16 23.367  -05 31 28.79  22.1G 15BQ518   F51  C~2r7a      
2015 02  22.43491  10 16 23.320  -05 31 28.66  22.8G 15BQ518   F51  C~2r7a      
2015 04  14.33103  10 13 05.210  -05 06 23.16  21.9G 15BQ518   F51  C~2r7a      
2015 12  24.59219  10 24 42.713  -06 14 54.26  22.0G 15BQ518   F51  C~2r7a      
2016 01  11.56746  10 23 58.292  -06 16 59.59  22.1G 15BQ518   F51  C~2r7a      
2016 01  11.58086  10 23 58.240  -06 16 59.63  22.2G 15BQ518   F51  C~2r7a      
2016 01  11.59422  10 23 58.192  -06 16 59.74  22.2G 15BQ518   F51  C~2r7a      
2016 01  11.60759  10 23 58.158  -06 16 59.71  21.9G 15BQ518   F51  C~2r7a      
2016 01  12.52568  10 23 55.259  -06 17 00.28  22.2G 15BQ518   F51  C~2r7b      
2016 01  12.53782  10 23 55.211  -06 17 00.38  21.9G 15BQ518   F51  C~2r7b      
2016 01  12.54989  10 23 55.172  -06 17 00.32  22.0G 15BQ518   F51  C~2r7b      
2016 01  12.56198  10 23 55.134  -06 17 00.29  22.1G 15BQ518   F51  C~2r7b      
2016 01  17.52235  10 23 38.491  -06 16 53.47  22.3G 15BQ518   F51  C~2r7b      
2016 01  17.53565  10 23 38.441  -06 16 53.46  22.0G 15BQ518   F51  C~2r7b      
2016 01  17.54898  10 23 38.389  -06 16 53.36  22.1G 15BQ518   F51  C~2r7b      
2016 01  17.56230  10 23 38.342  -06 16 53.46  22.0G 15BQ518   F51  C~2r7b      
2016 03  06.40184  10 20 06.536  -06 02 57.78  21.6G 15BQ518   F51  C~2r7b      
2016 03  06.41441  10 20 06.454  -06 02 57.56  21.6G 15BQ518   F51  C~2r7b      
2016 03  13.38118  10 19 35.721  -05 59 34.70  22.1G 15BQ518   F51  C~2r7b      
2016 03  13.39233  10 19 35.679  -05 59 34.23  22.1G 15BQ518   F51  C~2r7b      
2016 03  13.40345  10 19 35.619  -05 59 33.96  22.0G 15BQ518   F51  C~2r7b      
2016 03  13.41460  10 19 35.579  -05 59 33.64  22.3G 15BQ518   F51  C~2r7b      
2016 03  14.36919  10 19 31.482  -05 59 05.02  21.8G 15BQ518   F51  C~2r7b      
2016 03  30.35829  10 18 28.581  -05 50 44.81  22.0G 15BQ518   F51  C~2r7b      
2016 03  30.37068  10 18 28.536  -05 50 44.39  22.1G 15BQ518   F51  C~2r7b      
2016 03  30.38309  10 18 28.492  -05 50 44.09  22.2G 15BQ518   F51  C~2r7b      
2016 03  30.39548  10 18 28.444  -05 50 43.69  22.1G 15BQ518   F51  C~2r7b      
2016 04  30.25631  10 17 11.811  -05 35 10.54  22.0G 15BQ518   F51  C~2r7b      
2016 04  30.26745  10 17 11.806  -05 35 10.04  21.8G 15BQ518   F51  C~2r7b      
2016 04  30.27859  10 17 11.780  -05 35 09.86  22.3G 15BQ518   F51  C~2r7b      
2016 04  30.28970  10 17 11.772  -05 35 09.51  22.1G 15BQ518   F51  C~2r7b      
2017 01  29.58473  10 27 29.816  -06 51 58.69  22.2G 15BQ518   F51  C~2r7b      
2017 02  25.43687  10 25 30.088  -06 43 52.18  22.1G 15BQ518   F51  C~2r7b      
2017 02  25.44929  10 25 30.020  -06 43 51.78  22.2G 15BQ518   F51  C~2r7b      
2017 02  25.46170  10 25 29.971  -06 43 51.52  22.2G 15BQ518   F51  C~2r7b      
2017 02  25.47410  10 25 29.898  -06 43 51.15  21.8G 15BQ518   F51  C~2r7b      
2017 03  18.39137  10 23 56.683  -06 34 00.08  22.3G 15BQ518   F51  C~2r7b      
2017 03  18.40459  10 23 56.620  -06 33 59.65  21.8G 15BQ518   F51  C~2r7b      
2017 04  01.35832  10 23 02.748  -06 26 36.27  22.0G 15BQ518   F51  C~2r7b      
2017 04  01.36962  10 23 02.704  -06 26 35.86  21.9G 15BQ518   F51  C~2r7b      
2017 04  01.38094  10 23 02.665  -06 26 35.59  22.1G 15BQ518   F51  C~2r7b      
2017 04  01.39223  10 23 02.608  -06 26 35.11  22.4G 15BQ518   F51  C~2r7b      
2018 04  10.14981  10 27 14.630  -06 58 33.85  22.2R 15BQ518   G37  C~2bHJ      
2018 04  10.20467  10 27 14.445  -06 58 31.27        15BQ518   G37  C~2bHJ      

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     0.06       0.00     0.02
  2   0.0000      0.00    -0.03       0.00    -0.16
  3   0.0001      0.00     0.13       0.00     0.02
  4   0.0001      0.00     0.05       0.00    -0.04
  5   0.1665      0.00    -0.13       0.00    -0.23
  6   0.1665      0.00    -0.16       0.00    -0.01
  7   0.1666      0.00     0.14       0.00     0.21
  8   0.1666      0.00    -0.01       0.00     0.07
  9   1.0404      0.00    -0.27       0.00    -0.02
 10   2.0124      0.00    -0.18       0.00    -0.01
 11   2.0151      0.00     0.04       0.00    -0.30
 12   2.0918      0.00    -0.06       0.00    -0.13
 13   2.8834      0.00    -0.10       0.00    -0.09
 14   3.0118      0.00     0.12       0.00     0.14
 15   3.0119      0.00     0.31       0.00     0.50
 16   3.0119      0.00     0.03       0.00     0.23
 17   3.0170      0.00     0.19       0.00    -0.11
 18   3.0171      0.00    -0.17       0.00     0.02
 19   3.0171      0.00    -0.05       0.00     0.08
 20   3.0171      0.00    -0.04       0.00     0.02
 21   3.0854      0.00     0.05       0.00    -0.04
 22   3.0854      0.00     0.09       0.00    -0.11
 23   3.0855      0.00     0.16       0.00    -0.01
 24   3.0855      0.00     0.08       0.00     0.13
 25   3.0908      0.00    -0.17       0.00     0.13
 26   3.0908      0.00     0.14       0.00     0.02
 27   3.0909      0.00    -0.14       0.00    -0.08
 28   3.0909      0.00     0.07       0.00    -0.25
 29   3.2303      0.00    -0.08       0.00    -0.19
 30   3.9264      0.00     0.05       0.00     0.05
 31   3.9756      0.00     0.09       0.00     0.14
 32   3.9756      0.00    -0.04       0.00     0.11
 33   3.9757      0.00    -0.11       0.00     0.01
 34   3.9757      0.00     0.02       0.00     0.05
 35   3.9782      0.00     0.05       0.00     0.05
 36   3.9783      0.00    -0.07       0.00    -0.05
 37   3.9783      0.00    -0.06       0.00     0.02
 38   3.9783      0.00    -0.04       0.00     0.05
 39   3.9919      0.00     0.08       0.00     0.06
 40   3.9919      0.00     0.05       0.00     0.03
 41   3.9920      0.00    -0.01       0.00     0.09
 42   3.9920      0.00     0.00       0.00    -0.05
 43   4.1257      0.00     0.37       0.00     0.09
 44   4.1258      0.00     0.00       0.00    -0.05
 45   4.1448      0.00    -0.08       0.00    -0.08
 46   4.1449      0.00     0.02       0.00     0.06
 47   4.1449      0.00    -0.15       0.00    -0.00
 48   4.1449      0.00    -0.01       0.00    -0.02
 49   4.1475      0.00    -0.08       0.00    -0.11
 50   4.1913      0.00     0.03       0.00     0.07
 51   4.1913      0.00     0.03       0.00     0.09
 52   4.1914      0.00     0.04       0.00    -0.00
 53   4.1914      0.00    -0.01       0.00     0.00
 54   4.2759      0.00    -0.06       0.00    -0.09
 55   4.2759      0.00     0.09       0.00     0.11
 56   4.2760      0.00    -0.07       0.00    -0.01
 57   4.2760      0.00     0.04       0.00     0.04
 58   5.0270      0.00    -0.02       0.00     0.01
 59   5.1005      0.00    -0.02       0.00    -0.06
 60   5.1005      0.00    -0.16       0.00     0.03
 61   5.1006      0.00    -0.02       0.00    -0.02
 62   5.1006      0.00    -0.24       0.00     0.05
 63   5.1579      0.00     0.06       0.00     0.05
 64   5.1579      0.00    -0.04       0.00     0.07
 65   5.1961      0.00    -0.01       0.00    -0.01
 66   5.1961      0.00    -0.06       0.00     0.03
 67   5.1962      0.00    -0.04       0.00    -0.06
 68   5.1962      0.00    -0.29       0.00     0.05
 69   6.2195      0.00     0.21       0.00    -0.63
 70   6.2196      0.00     0.00       0.00     0.18

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.

15BQ518    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        41.497    41.497    41.497
ecceobj         0.056     0.056     0.056
incobj         16.003    16.003    16.003
qmin           38.549    38.564    38.582
qmax           44.719    44.704    44.713
amean          41.559    41.559    41.559
amin           41.244    41.237    41.247
amax           41.893    41.891    41.894
emean           0.055     0.055     0.055
emin            0.043     0.043     0.043
emax            0.069     0.068     0.068
imean          17.767    17.767    17.767
imin           17.140    17.140    17.138
imax           18.357    18.358    18.355
excite_mean     0.310     0.310     0.310
fracstop        1.000     1.000     1.000
cjmean          2.958     2.958     2.958

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       179.2     179.4     179.3
kozaiamp        179.9     180.0     180.0