Orbit Fit and Astrometric record for 15BH519

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: 15BH519   
# Created Thu Oct 19 01:38:33 2017
# Orbit generated from Bernstein formalism
# Fitting   33 observations of   33
# Arc:   3.13y
# First observation: 2012/02/27
#  Last observation: 2015/04/15
Preliminary a, adot, b, bdot, g, gdot:
  -0.000172   0.023339   0.000042  -0.012304   0.024468   0.000000
# Chi-squared of fit:    17.82 DOF:   60 RMS:  0.13
# Min/Max residuals:    -0.33    0.30
# Exact a, adot, b, bdot, g, gdot:
  1.522620E-05  2.293476E-02 -8.128205E-06 -1.207304E-02  2.461226E-02 -6.071338E-03
# Covariance matrix:
  2.5803E-13  9.9332E-14  1.2757E-14 -1.0027E-13  2.4316E-13  2.6210E-12
  9.9332E-14  6.9094E-13  5.0959E-14 -3.9933E-13  6.6419E-13  1.0446E-11
  1.2757E-14  5.0959E-14  1.8898E-13 -9.3941E-14  5.1697E-14  8.0365E-13
 -1.0027E-13 -3.9933E-13 -9.3941E-14  2.6897E-13 -4.0584E-13 -6.2983E-12
  2.4316E-13  6.6419E-13  5.1697E-14 -4.0584E-13  8.6020E-13  1.0612E-11
  2.6210E-12  1.0446E-11  8.0365E-13 -6.2983E-12  1.0612E-11  1.6475E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.027540 -172.077540    0.491227    0.000419   -0.862412  2455984.980206
# Heliocentric elements and errors
Epoch:              2455980.5000  =  2012/02/23
Mean Anomaly:          327.50034 +/-     0.024
Argument of Peri:      240.97507 +/-     0.049
Long of Asc Node:        7.29349 +/-     0.000
Inclination:            27.88055 +/-     0.000
Eccentricity:         0.32280783 +/-    0.0005
Semi-Major Axis:     53.56065874 +/-    0.0236
Time of Perihelion: 2468905.8880 +/-       4.6
Perihelion:          36.27085850 +/-    0.0325
Aphelion:            70.85045898 +/-    0.0421
Period (y)              391.9919 +/-      0.26
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -41.16117940 +/-    0.0015
Ecliptic Y           -5.23152651 +/-    0.0002
Ecliptic Z            0.01920092 +/-    0.0000
Ecliptic XDOT         0.00101521 +/-    0.0000
Ecliptic YDOT        -0.00242977 +/-    0.0000
Ecliptic ZDOT        -0.00134322 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.49231167 +/-    0.0015
Geocenter to KBO     40.63015851 +/-    0.0015
# Hcoef:  6.22

The following table shows the complete astrometric record for 15BH519. 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 (15BH519) followed by the observatory code and reference code for the source of the astrometry.

2012 02  27.47944  12 29 08.859  -03 07 03.40  22.4w 15BH519   F51  C~1vYD      
2012 02  27.49423  12 29 08.792  -03 07 03.37  22.6w 15BH519   F51  C~1vYD      
2012 02  27.50901  12 29 08.750  -03 07 02.96  22.4w 15BH519   F51  C~1vYD      
2012 02  27.52376  12 29 08.691  -03 07 02.70  22.5w 15BH519   F51  C~1vYD      
2012 04  14.34380  12 25 33.917  -02 49 48.10  22.4w 15BH519   F51  C~1vYD      
2012 04  14.35865  12 25 33.841  -02 49 47.69  22.3w 15BH519   F51  C~1vYD      
2012 04  14.37349  12 25 33.782  -02 49 47.39  22.3w 15BH519   F51  C~1vYD      
2012 04  14.38832  12 25 33.700  -02 49 47.04  22.3w 15BH519   F51  C~1vYD      
2014 04  29.30309  12 32 04.488  -05 05 05.63  22.1w 15BH519   F51  C~1vYD      
2014 04  29.31505  12 32 04.443  -05 05 05.42  22.3w 15BH519   F51  C~1vYD      
2014 04  29.32702  12 32 04.390  -05 05 05.12  22.3w 15BH519   F51  C~1vYD      
2015 01  23.54789  12 42 14.470  -06 42 26.58  22.6w 15BH519   F51  C~1vYD      
2015 01  23.56326  12 42 14.454  -06 42 26.68  22.5w 15BH519   F51  C~1vYD      
2015 01  23.57866  12 42 14.427  -06 42 26.72  22.6w 15BH519   F51  C~1vYD      
2015 01  23.59403  12 42 14.410  -06 42 26.67  22.6w 15BH519   F51  C~1vYD      
2015 01  25.54087  12 42 11.599  -06 42 29.82  22.5w 15BH519   F51  C~1vYD      
2015 01  25.55614  12 42 11.552  -06 42 29.73  22.4w 15BH519   F51  C~1vYD      
2015 01  25.57147  12 42 11.547  -06 42 30.02  22.5w 15BH519   F51  C~1vYD      
2015 01  25.58677  12 42 11.521  -06 42 29.71  22.6w 15BH519   F51  C~1vYD      
2015 02  27.54368  12 40 37.369  -06 38 11.44  22.4w 15BH519   F51  C~1vYD      
2015 02  27.55623  12 40 37.304  -06 38 11.51  22.4w 15BH519   F51  C~1vYD      
2015 02  27.56877  12 40 37.269  -06 38 11.28  22.5w 15BH519   F51  C~1vYD      
2015 02  27.58129  12 40 37.209  -06 38 11.02  22.2w 15BH519   F51  C~1vYD      
2015 03  30.38343  12 38 16.783  -06 27 50.78  21.5i 15BH519   F51  C~1vYD      
2015 03  30.39531  12 38 16.715  -06 27 50.59  21.6i 15BH519   F51  C~1vYD      
2015 03  30.40720  12 38 16.653  -06 27 50.21  21.5i 15BH519   F51  C~1vYD      
2015 04  13.38728  12 37 09.182  -06 22 25.03  22.3w 15BH519   F51  C~1vYD      
2015 04  13.39812  12 37 09.125  -06 22 24.86  22.4w 15BH519   F51  C~1vYD      
2015 04  13.40894  12 37 09.072  -06 22 24.34  22.2w 15BH519   F51  C~1vYD      
2015 04  13.41990  12 37 09.018  -06 22 24.09  22.2w 15BH519   F51  C~1vYD      
2015 04  15.40484  12 36 59.667  -06 21 38.50  22.1w 15BH519   F51  C~1vYD      
2015 04  15.41548  12 36 59.609  -06 21 38.15  22.4w 15BH519   F51  C~1vYD      
2015 04  15.42608  12 36 59.576  -06 21 38.13  22.1w 15BH519   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    -0.10       0.00     0.08
  2   0.0000     -0.93    -0.09      -0.37    -0.18
  3   0.0001     -1.67     0.12      -0.24     0.05
  4   0.0001     -2.59     0.16      -0.35     0.05
  5   0.1283  -3367.22     0.07    -320.52    -0.04
  6   0.1283  -3368.43    -0.08    -320.60    -0.00
  7   0.1284  -3369.36     0.06    -320.67     0.03
  8   0.1284  -3370.63    -0.14    -320.84    -0.03
  9   2.1679   5208.81    -0.04   -5475.53    -0.03
 10   2.1679   5208.10     0.04   -5475.60    -0.03
 11   2.1680   5207.26    -0.02   -5475.64     0.01
 12   2.9050  15907.95     0.01   -7294.47     0.19
 13   2.9051  15907.77     0.12   -7294.66     0.16
 14   2.9051  15907.41     0.05   -7294.85     0.13
 15   2.9052  15907.16     0.09   -7294.90     0.24
 16   2.9105  15869.61     0.13   -7314.17     0.11
 17   2.9105  15868.93    -0.22   -7314.36     0.08
 18   2.9106  15868.97     0.16   -7314.66    -0.06
 19   2.9106  15868.49     0.02   -7314.52     0.23
 20   3.0009  14468.21    -0.10   -7623.70     0.09
 21   3.0009  14467.34    -0.18   -7624.14    -0.24
 22   3.0009  14466.77     0.02   -7624.13    -0.11
 23   3.0010  14465.84    -0.13   -7624.24    -0.11
 24   3.0853  12286.94    -0.16   -7870.01    -0.09
 25   3.0853  12285.93    -0.25   -7870.23    -0.22
 26   3.0854  12284.92    -0.33   -7870.24    -0.14
 27   3.1236  11228.10     0.19   -7964.13    -0.04
 28   3.1237  11227.25     0.16   -7964.31    -0.14
 29   3.1237  11226.32     0.04   -7964.14     0.10
 30   3.1237  11225.47     0.02   -7964.22     0.09
 31   3.1292  11078.84     0.11   -7976.80    -0.06
 32   3.1292  11077.90    -0.03   -7976.82    -0.01
 33   3.1292  11077.44     0.30   -7976.99    -0.11

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.

15BH519    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        53.446    53.508    53.385
ecceobj         0.322     0.323     0.320
incobj         27.914    27.914    27.913
qmin           35.566    35.539    35.509
qmax           72.916    73.028    72.840
amean          53.803    53.863    53.751
amin           53.265    53.313    53.205
amax           54.501    54.528    54.441
emean           0.318     0.319     0.318
emin            0.299     0.298     0.300
emax            0.338     0.339     0.338
imean          28.361    28.375    28.321
imin           27.855    27.860    27.846
imax           28.997    29.077    28.930
excite_mean     0.572     0.573     0.571
fracstop        1.000     1.000     1.000
cjmean          2.789     2.788     2.789

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       186.6     183.0     187.8
kozaiamp        180.0     180.0     180.0