Orbit Fit and Astrometric record for 15BG519

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: 15BG519   
# Created Mon Oct 23 01:38:34 2017
# Orbit generated from Bernstein formalism
# Fitting   38 observations of   38
# Arc:   4.12y
# First observation: 2011/02/05
#  Last observation: 2015/03/21
Preliminary a, adot, b, bdot, g, gdot:
  -0.000122   0.021004   0.000049  -0.013931   0.025382   0.000000
# Chi-squared of fit:    26.10 DOF:   70 RMS:  0.15
# Min/Max residuals:    -0.40    0.36
# Exact a, adot, b, bdot, g, gdot:
  1.262315E-05  2.091291E-02 -7.930812E-06 -1.386511E-02  2.557818E-02 -1.345929E-06
# Covariance matrix:
  2.4856E-13 -2.1152E-13 -6.8687E-14  1.1668E-13 -1.1521E-13 -1.8081E-12
 -2.1152E-13  3.6955E-13  1.4338E-13 -2.4390E-13  3.4110E-13  3.7814E-12
 -6.8687E-14  1.4338E-13  2.1939E-13 -1.4311E-13  1.3360E-13  1.5347E-12
  1.1668E-13 -2.4390E-13 -1.4311E-13  1.8422E-13 -2.2817E-13 -2.6103E-12
 -1.1521E-13  3.4110E-13  1.3360E-13 -2.2817E-13  5.9148E-13  3.5422E-12
 -1.8081E-12  3.7814E-12  1.5347E-12 -2.6103E-12  3.5422E-12  4.0468E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -7.742826  162.512213    0.437456   -0.119550   -0.879262  2455597.950396
# Heliocentric elements and errors
Epoch:              2455590.5000  =  2011/01/29
Mean Anomaly:          199.07760 +/-     0.441
Argument of Peri:      355.47861 +/-     0.440
Long of Asc Node:      330.69660 +/-     0.000
Inclination:            34.42896 +/-     0.000
Eccentricity:         0.03062053 +/-    0.0001
Semi-Major Axis:     38.84592217 +/-    0.0032
Time of Perihelion: 2495120.8435 +/-     108.3
Perihelion:          37.65643947 +/-    0.0048
Aphelion:            40.03540486 +/-    0.0049
Period (y)              242.1176 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -37.65974202 +/-    0.0011
Ecliptic Y           12.32419501 +/-    0.0003
Ecliptic Z           -5.26758098 +/-    0.0002
Ecliptic XDOT        -0.00048296 +/-    0.0000
Ecliptic YDOT        -0.00218908 +/-    0.0000
Ecliptic ZDOT        -0.00147054 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.97360831 +/-    0.0011
Geocenter to KBO     39.09582974 +/-    0.0012
# Hcoef:  6.31

The following table shows the complete astrometric record for 15BG519. 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 (15BG519) followed by the observatory code and reference code for the source of the astrometry.

2011 02  05.44963  10 43 42.261  -00 17 45.62  22.4w 15BG519   F51  C~1vYD      
2011 02  05.46386  10 43 42.171  -00 17 45.17  22.6w 15BG519   F51  C~1vYD      
2011 02  05.47833  10 43 42.103  -00 17 45.13  22.2w 15BG519   F51  C~1vYD      
2011 02  05.49275  10 43 42.056  -00 17 44.77  22.6w 15BG519   F51  C~1vYD      
2012 01  19.46651  10 48 07.893  -01 31 35.68  22.2w 15BG519   F51  C~1vYD      
2012 01  19.48933  10 48 07.816  -01 31 35.63  22.3w 15BG519   F51  C~1vYD      
2012 01  19.50338  10 48 07.753  -01 31 35.44  22.6w 15BG519   F51  C~1vYD      
2012 01  19.51749  10 48 07.705  -01 31 35.57  22.6w 15BG519   F51  C~1vYD      
2012 03  19.33828  10 43 22.459  -01 14 16.33  22.6w 15BG519   F51  C~1vYD      
2012 03  19.35223  10 43 22.404  -01 14 15.99  22.4w 15BG519   F51  C~1vYD      
2012 03  19.36619  10 43 22.320  -01 14 15.71  22.6w 15BG519   F51  C~1vYD      
2012 03  19.38015  10 43 22.268  -01 14 15.54  22.5w 15BG519   F51  C~1vYD      
2013 03  05.41477  10 47 47.824  -02 31 36.68  22.4w 15BG519   F51  C~1vYD      
2013 03  05.42970  10 47 47.746  -02 31 36.36  22.2w 15BG519   F51  C~1vYD      
2013 03  05.44464  10 47 47.672  -02 31 36.15  22.4w 15BG519   F51  C~1vYD      
2013 03  05.45961  10 47 47.592  -02 31 35.67  22.3w 15BG519   F51  C~1vYD      
2015 01  23.48785  10 57 34.610  -05 04 31.03  22.3w 15BG519   F51  C~1vYD      
2015 01  23.49932  10 57 34.566  -05 04 31.02  22.4w 15BG519   F51  C~1vYD      
2015 01  23.51077  10 57 34.515  -05 04 30.91  22.4w 15BG519   F51  C~1vYD      
2015 01  23.52224  10 57 34.474  -05 04 31.03  22.2w 15BG519   F51  C~1vYD      
2015 01  25.48065  10 57 26.943  -05 04 25.06  22.3w 15BG519   F51  C~1vYD      
2015 01  25.49204  10 57 26.879  -05 04 24.95  22.5w 15BG519   F51  C~1vYD      
2015 01  25.50340  10 57 26.851  -05 04 24.99  22.4w 15BG519   F51  C~1vYD      
2015 01  25.51478  10 57 26.806  -05 04 24.90  22.2w 15BG519   F51  C~1vYD      
2015 02  20.42808  10 55 28.478  -04 59 33.15  22.6w 15BG519   F51  C~1vYD      
2015 02  20.44106  10 55 28.422  -04 59 33.09  22.3w 15BG519   F51  C~1vYD      
2015 02  20.45374  10 55 28.332  -04 59 32.75  22.4w 15BG519   F51  C~1vYD      
2015 02  20.46644  10 55 28.290  -04 59 32.52  22.3w 15BG519   F51  C~1vYD      
2015 02  25.46001  10 55 02.920  -04 57 57.26  22.3w 15BG519   F51  C~1vYD      
2015 02  25.47397  10 55 02.861  -04 57 56.77  22.3w 15BG519   F51  C~1vYD      
2015 02  25.50185  10 55 02.741  -04 57 56.17  22.3w 15BG519   F51  C~1vYD      
2015 03  20.35330  10 53 06.722  -04 48 55.33  22.6w 15BG519   F51  C~1vYD      
2015 03  20.36598  10 53 06.668  -04 48 55.08  22.2w 15BG519   F51  C~1vYD      
2015 03  20.37866  10 53 06.591  -04 48 54.73  22.5w 15BG519   F51  C~1vYD      
2015 03  21.38744  10 53 01.701  -04 48 28.14  22.3w 15BG519   F51  C~1vYD      
2015 03  21.40005  10 53 01.632  -04 48 27.67  22.2w 15BG519   F51  C~1vYD      
2015 03  21.41258  10 53 01.558  -04 48 27.49  22.4w 15BG519   F51  C~1vYD      
2015 03  21.42523  10 53 01.517  -04 48 27.11  22.5w 15BG519   F51  C~1vYD      

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    -0.13
  2   0.0000     -1.42    -0.34      -0.10    -0.03
  3   0.0001     -2.38    -0.26      -0.45    -0.18
  4   0.0001     -3.17    -0.02      -0.38     0.09
  5   0.9528   5367.98     0.02   -2588.72     0.08
  6   0.9529   5366.89     0.15   -2589.11     0.09
  7   0.9529   5365.94    -0.04   -2589.29     0.16
  8   0.9530   5365.32     0.10   -2589.69     0.02
  9   1.1167   1011.75     0.05   -3250.17    -0.00
 10   1.1168   1010.86     0.24   -3250.17     0.06
 11   1.1168   1009.58     0.05   -3250.39    -0.09
 12   1.1169   1008.80     0.34   -3250.52    -0.16
 13   2.0779   6456.73    -0.10   -6038.37     0.11
 14   2.0780   6455.53    -0.09   -6038.52     0.09
 15   2.0780   6454.42     0.01   -6038.74    -0.02
 16   2.0781   6453.13    -0.06   -6038.75     0.09
 17   3.9645  18116.34     0.05  -11246.58    -0.04
 18   3.9645  18115.72     0.06  -11246.82    -0.05
 19   3.9646  18114.97    -0.06  -11247.00    -0.01
 20   3.9646  18114.44     0.04  -11247.34    -0.13
 21   3.9700  18007.08     0.25  -11284.21    -0.11
 22   3.9700  18006.14    -0.03  -11284.46    -0.15
 23   3.9700  18005.77     0.24  -11284.66    -0.13
 24   3.9701  18005.10     0.23  -11284.83    -0.08
 25   4.0410  16243.66    -0.13  -11679.71     0.12
 26   4.0410  16242.86     0.08  -11679.97     0.01
 27   4.0411  16241.47    -0.31  -11680.16    -0.02
 28   4.0411  16240.80     0.01  -11680.19     0.11
 29   4.0548  15850.92    -0.40  -11734.47    -0.08
 30   4.0548  15849.91    -0.29  -11734.35     0.19
 31   4.0549  15848.01     0.04  -11734.46     0.36
 32   4.1175  14026.04    -0.13  -11885.35    -0.06
 33   4.1175  14025.20     0.03  -11885.42    -0.08
 34   4.1175  14023.99    -0.17  -11885.53    -0.15
 35   4.1203  13945.79     0.19  -11888.38     0.03
 36   4.1203  13944.65     0.05  -11888.34     0.12
 37   4.1204  13943.55    -0.06  -11888.59    -0.09
 38   4.1204  13942.84     0.22  -11888.46     0.08

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.

15BG519    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        38.896    38.905    38.887
ecceobj         0.030     0.029     0.030
incobj         34.417    34.417    34.417
qmin           37.204    37.217    37.214
qmax           40.894    40.914    40.907
amean          38.994    39.007    38.986
amin           38.706    38.720    38.701
amax           39.293    39.297    39.272
emean           0.031     0.031     0.031
emin            0.021     0.022     0.022
emax            0.042     0.042     0.042
imean          35.431    35.432    35.431
imin           35.113    35.111    35.117
imax           35.732    35.733    35.736
excite_mean     0.581     0.581     0.581
fracstop        1.000     1.000     1.000
cjmean          2.625     2.625     2.625

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       172.2     171.2     173.3
kozaiamp        180.0     180.0     179.9