Orbit Fit and Astrometric record for 15BB519

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: 15BB519   
# Created Fri Dec  3 02:13:11 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     71 observations of     71
# Arc:   6.98y
# First observation: 2011/01/25
#  Last observation: 2018/01/16
# Chi-squared of fit:    55.64 DOF:    136 RMS:  0.16
# Min/Max residuals:    -0.40    0.54
# Exact a, adot, b, bdot, g, gdot:
  1.522729E-05  2.510905E-02  8.585425E-06  1.292489E-02  2.535621E-02  7.801413E-03
# Covariance matrix:
  3.3421E-13 -1.3200E-13  7.1794E-14 -4.7303E-14 -4.6035E-14 -5.0070E-13
 -1.3200E-13  7.0894E-14 -4.8447E-14  3.1849E-14  4.2455E-14  3.3689E-13
  7.1794E-14 -4.8447E-14  2.2920E-13 -6.3858E-14 -3.9655E-14 -2.6551E-13
 -4.7303E-14  3.1849E-14 -6.3858E-14  2.5391E-14  2.5431E-14  1.7433E-13
 -4.6035E-14  4.2455E-14 -3.9655E-14  2.5431E-14  1.3534E-13  2.6703E-13
 -5.0070E-13  3.3689E-13 -2.6551E-13  1.7433E-13  2.6703E-13  1.8433E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   -4.339356  113.794350   -0.191860   -0.073276   -0.965720  2455586.822776
# Heliocentric elements and errors
Epoch:              2455586.5000  =  2011/01/25
Mean Anomaly:           20.14205 +/-     0.003
Argument of Peri:      297.26700 +/-     0.006
Long of Asc Node:      122.21035 +/-     0.000
Inclination:            27.58828 +/-     0.000
Eccentricity:         0.44611686 +/-    0.0001
Semi-Major Axis:     63.80781850 +/-    0.0064
Time of Perihelion: 2445170.2726 +/-       2.4
Perihelion:          35.34207516 +/-    0.0051
Aphelion:            92.27356184 +/-    0.0100
Period (y)              509.7052 +/-      0.08
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -16.42857975 +/-    0.0002
Ecliptic Y           36.79035045 +/-    0.0005
Ecliptic Z           -2.98371069 +/-    0.0000
Ecliptic XDOT        -0.00286323 +/-    0.0000
Ecliptic YDOT        -0.00022256 +/-    0.0000
Ecliptic ZDOT         0.00132785 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.40191590 +/-    0.0005
Geocenter to KBO     39.43791109 +/-    0.0006
# Hcoef:  6.67

The following table shows the complete astrometric record for 15BB519. 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 (15BB519) followed by the observatory code and reference code for the source of the astrometry.

2011 01  25.32201  07 39 32.921  +17 04 03.94  23.3G 15BB519   F51  C~36pk      
2011 01  25.33486  07 39 32.847  +17 04 04.56  23.5G 15BB519   F51  C~36pk      
2011 01  25.34773  07 39 32.774  +17 04 04.96  22.5G 15BB519   F51  C~36pk      
2012 05  08.27127  07 43 23.865  +17 58 48.41  22.7G 15BB519   F51  C~36pk      
2013 02  10.40882  07 50 59.201  +18 06 14.38  22.6G 15BB519   F51  C~36pk      
2013 02  10.42420  07 50 59.149  +18 06 14.65  22.3G 15BB519   F51  C~36pk      
2013 02  10.43966  07 50 59.059  +18 06 14.92  23.4G 15BB519   F51  C~36pk      
2013 02  10.45509  07 50 58.996  +18 06 15.28  22.3G 15BB519   F51  C~36pk      
2013 12  31.54023  08 00 41.149  +18 17 46.73  22.4w 15BB519   F51  C~2VWB      
2013 12  31.55612  08 00 41.067  +18 17 47.40  22.1w 15BB519   F51  C~2VWB      
2013 12  31.58531  08 00 40.923  +18 17 47.92  22.7w 15BB519   F51  C~2VWB      
2014 10  28.58436  08 09 33.895  +18 28 51.47  23.3G 15BB519   F51  C~36pk      
2014 12  21.58605  08 07 39.250  +18 39 16.74  22.5G 15BB519   F51  C~36pk      
2014 12  21.59991  08 07 39.201  +18 39 17.27  22.6G 15BB519   F51  C~36pk      
2014 12  21.65060  08 07 38.978  +18 39 18.23  22.9G 15BB519   F51  C~36pk      
2014 12  21.65257  08 07 38.971  +18 39 18.54  22.4G 15BB519   F51  C~36pk      
2014 12  21.65454  08 07 38.962  +18 39 18.37  23.1G 15BB519   F51  C~36pk      
2014 12  21.65719  08 07 38.936  +18 39 18.34  22.8G 15BB519   F51  C~36pk      
2015 01  14.37076  08 05 46.548  +18 47 29.77  22.4G 15BB519   F51  C~36pk      
2015 01  14.38311  08 05 46.482  +18 47 29.94  22.6G 15BB519   F51  C~36pk      
2015 01  14.39535  08 05 46.419  +18 47 30.27  23.0G 15BB519   F51  C~36pk      
2015 01  14.40757  08 05 46.372  +18 47 30.63  22.2G 15BB519   F51  C~36pk      
2015 01  16.52663  08 05 35.607  +18 48 17.38  22.6w 15BB519   F51  C~1vYC      
2015 01  16.53888  08 05 35.545  +18 48 17.86  23.0w 15BB519   F51  C~1vYC      
2015 01  16.55114  08 05 35.487  +18 48 18.04  22.7w 15BB519   F51  C~1vYC      
2015 01  16.56344  08 05 35.433  +18 48 18.24  22.7w 15BB519   F51  C~1vYC      
2015 02  16.27974  08 03 05.952  +18 59 34.22  22.2G 15BB519   F51  C~36pk      
2015 02  16.29205  08 03 05.901  +18 59 34.20  22.1G 15BB519   F51  C~36pk      
2015 02  17.29180  08 03 01.569  +18 59 55.18  22.5w 15BB519   F51  C~1vYC      
2015 02  17.30420  08 03 01.527  +18 59 55.53  22.5w 15BB519   F51  C~1vYC      
2015 02  17.31657  08 03 01.449  +18 59 55.47  22.4w 15BB519   F51  C~1vYC      
2015 03  16.36558  08 01 29.641  +19 08 12.08  22.9G 15BB519   F51  C~36pk      
2015 03  16.37792  08 01 29.578  +19 08 12.11  22.9G 15BB519   F51  C~36pk      
2015 03  16.39020  08 01 29.582  +19 08 12.19  22.7G 15BB519   F51  C~36pk      
2015 03  16.40241  08 01 29.573  +19 08 12.83  22.9G 15BB519   F51  C~36pk      
2015 03  17.34182  08 01 27.386  +19 08 27.02  22.7w 15BB519   F51  C~1vYC      
2015 03  17.35424  08 01 27.365  +19 08 27.34  22.8w 15BB519   F51  C~1vYC      
2015 03  17.36674  08 01 27.314  +19 08 27.52  22.8w 15BB519   F51  C~1vYC      
2015 04  10.29593  08 01 00.674  +19 13 14.78  22.9w 15BB519   F51  C~1vYC      
2015 04  10.31953  08 01 00.661  +19 13 14.96  22.6w 15BB519   F51  C~1vYC      
2015 04  10.33127  08 01 00.684  +19 13 15.15  22.7w 15BB519   F51  C~1vYC      
2016 01  03.40904  08 12 49.883  +19 07 11.36  23.1G 15BB519   F51  C~36pk      
2016 01  03.42069  08 12 49.822  +19 07 11.71  23.4G 15BB519   F51  C~36pk      
2016 01  03.43231  08 12 49.776  +19 07 11.84  23.6G 15BB519   F51  C~36pk      
2016 01  03.44396  08 12 49.727  +19 07 11.98  22.8G 15BB519   F51  C~36pk      
2016 01  07.38714  08 12 30.853  +19 08 38.08  22.7G 15BB519   F51  C~36pk      
2016 01  07.39960  08 12 30.750  +19 08 38.21  22.4G 15BB519   F51  C~36pk      
2016 01  07.41203  08 12 30.710  +19 08 38.42  22.5G 15BB519   F51  C~36pk      
2016 01  07.42452  08 12 30.633  +19 08 38.61  22.6G 15BB519   F51  C~36pk      
2016 02  11.27862  08 09 38.460  +19 21 40.98  22.8G 15BB519   F51  C~36pk      
2016 02  11.29029  08 09 38.384  +19 21 41.02  22.6G 15BB519   F51  C~36pk      
2016 02  11.30220  08 09 38.342  +19 21 41.44  22.6G 15BB519   F51  C~36pk      
2016 02  11.31383  08 09 38.298  +19 21 41.51  22.8G 15BB519   F51  C~36pk      
2016 03  03.23492  08 08 12.766  +19 28 41.00  23.2G 15BB519   F51  C~36pk      
2016 03  03.24659  08 08 12.718  +19 28 41.18  22.8G 15BB519   F51  C~36pk      
2016 03  03.26009  08 08 12.669  +19 28 41.41  23.1G 15BB519   F51  C~36pk      
2016 03  03.27174  08 08 12.612  +19 28 41.95  23.2G 15BB519   F51  C~36pk      
2016 11  08.58542  08 21 29.011  +19 15 02.91  23.6G 15BB519   F51  C~36pk      
2017 01  05.43638  08 18 39.977  +19 30 48.23  22.5G 15BB519   F51  C~36pk      
2017 01  28.48453  08 16 46.013  +19 39 37.97  23.1G 15BB519   F51  C~36pk      
2017 01  28.49745  08 16 45.953  +19 39 38.31  22.9G 15BB519   F51  C~36pk      
2017 01  28.51039  08 16 45.867  +19 39 38.62  23.0G 15BB519   F51  C~36pk      
2017 01  28.52333  08 16 45.828  +19 39 39.03  23.2G 15BB519   F51  C~36pk      
2017 11  20.54544  08 27 10.059  +19 38 03.88  22.6G 15BB519   F51  C~36pk      
2017 12  12.51750  08 26 16.791  +19 43 49.32  21.7G 15BB519   F51  C~36pk      
2017 12  20.47581  08 25 48.147  +19 46 25.39  22.9R 15BB519   G37  C~2VWB      
2017 12  20.51622  08 25 47.967  +19 46 26.26        15BB519   G37  C~2VWB      
2018 01  16.34786  08 23 47.244  +19 56 27.82  22.8G 15BB519   F51  C~36pk      
2018 01  16.35949  08 23 47.194  +19 56 27.94  22.8G 15BB519   F51  C~36pk      
2018 01  16.37112  08 23 47.128  +19 56 28.30  22.7G 15BB519   F51  C~36pk      
2018 01  16.38280  08 23 47.073  +19 56 28.46  23.0G 15BB519   F51  C~36pk      

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     0.07       0.00    -0.12
     2   0.0000      0.00    -0.04       0.00     0.22
     3   0.0001      0.00    -0.13       0.00     0.35
     4   1.2839      0.00    -0.11       0.00     0.03
     5   2.0454      0.00    -0.08       0.00     0.11
     6   2.0455      0.00     0.21       0.00     0.05
     7   2.0455      0.00    -0.07       0.00    -0.01
     8   2.0455      0.00     0.05       0.00     0.03
     9   2.9328      0.00    -0.01       0.00    -0.38
    10   2.9329      0.00    -0.07       0.00    -0.03
    11   2.9330      0.00    -0.09       0.00    -0.09
    12   3.7570      0.00     0.23       0.00    -0.36
    13   3.9049      0.00    -0.11       0.00    -0.37
    14   3.9049      0.00     0.06       0.00    -0.09
    15   3.9051      0.00    -0.00       0.00    -0.08
    16   3.9051      0.00     0.02       0.00     0.20
    17   3.9051      0.00     0.01       0.00    -0.01
    18   3.9051      0.00    -0.20       0.00    -0.09
    19   3.9700      0.00     0.01       0.00    -0.01
    20   3.9701      0.00    -0.03       0.00    -0.12
    21   3.9701      0.00    -0.04       0.00    -0.06
    22   3.9701      0.00     0.20       0.00     0.03
    23   3.9759      0.00    -0.05       0.00    -0.09
    24   3.9760      0.00    -0.04       0.00     0.12
    25   3.9760      0.00     0.04       0.00     0.03
    26   3.9760      0.00     0.18       0.00    -0.04
    27   4.0601      0.00    -0.20       0.00     0.19
    28   4.0602      0.00    -0.14       0.00    -0.09
    29   4.0629      0.00    -0.17       0.00     0.07
    30   4.0629      0.00     0.02       0.00     0.16
    31   4.0630      0.00    -0.34       0.00    -0.16
    32   4.1370      0.00     0.23       0.00    -0.01
    33   4.1370      0.00    -0.26       0.00    -0.17
    34   4.1371      0.00     0.24       0.00    -0.27
    35   4.1371      0.00     0.54       0.00     0.18
    36   4.1397      0.00    -0.06       0.00    -0.05
    37   4.1397      0.00     0.06       0.00     0.08
    38   4.1398      0.00    -0.27       0.00     0.07
    39   4.2053      0.00     0.04       0.00     0.02
    40   4.2053      0.00    -0.14       0.00     0.00
    41   4.2054      0.00     0.20       0.00     0.09
    42   4.9393      0.00    -0.03       0.00    -0.01
    43   4.9394      0.00    -0.11       0.00     0.09
    44   4.9394      0.00     0.04       0.00    -0.03
    45   4.9394      0.00     0.14       0.00    -0.14
    46   4.9502      0.00     0.39       0.00     0.20
    47   4.9502      0.00    -0.23       0.00     0.06
    48   4.9503      0.00     0.09       0.00    -0.01
    49   4.9503      0.00    -0.14       0.00    -0.09
    50   5.0457      0.00     0.12       0.00     0.12
    51   5.0458      0.00    -0.20       0.00    -0.10
    52   5.0458      0.00     0.01       0.00     0.06
    53   5.0458      0.00     0.17       0.00    -0.12
    54   5.1031      0.00     0.20       0.00     0.01
    55   5.1031      0.00     0.09       0.00    -0.02
    56   5.1032      0.00     0.07       0.00    -0.04
    57   5.1032      0.00    -0.17       0.00     0.29
    58   5.7885      0.00    -0.40       0.00     0.08
    59   5.9469      0.00     0.17       0.00    -0.25
    60   6.0100      0.00    -0.11       0.00    -0.06
    61   6.0101      0.00    -0.03       0.00    -0.02
    62   6.0101      0.00    -0.34       0.00    -0.00
    63   6.0101      0.00     0.06       0.00     0.11
    64   6.8206      0.00     0.33       0.00     0.01
    65   6.8808      0.00     0.02       0.00     0.25
    66   6.9025      0.00     0.15       0.00     0.09
    67   6.9027      0.00    -0.17       0.00     0.14
    68   6.9761      0.00    -0.10       0.00     0.13
    69   6.9761      0.00     0.02       0.00    -0.03
    70   6.9762      0.00    -0.10       0.00     0.06
    71   6.9762      0.00    -0.05       0.00    -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.

15BB519    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        64.377    64.377    64.376
ecceobj         0.451     0.451     0.451
incobj         27.562    27.562    27.562
qmin           34.477    34.444    34.355
qmax           94.122    94.820    94.019
amean          63.592    63.874    63.528
amin           62.648    63.052    62.723
amax           64.664    64.944    64.661
emean           0.437     0.440     0.438
emin            0.418     0.423     0.420
emax            0.457     0.461     0.458
imean          26.400    26.388    26.303
imin           25.660    25.594    25.466
imax           27.231    27.243    27.212
excite_mean     0.624     0.626     0.623
fracstop        1.000     1.000     1.000
cjmean          2.815     2.815     2.816

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       197.1     191.5     196.5
kozaiamp        180.0     180.0     180.0