Orbit Fit and Astrometric record for 16AN278

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: 16AN278   
# Created Fri Dec  3 02:13:45 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     42 observations of     42
# Arc:   6.94y
# First observation: 2013/12/30
#  Last observation: 2020/12/09
# Chi-squared of fit:    19.30 DOF:     78 RMS:  0.12
# Min/Max residuals:    -0.26    0.33
# Exact a, adot, b, bdot, g, gdot:
  1.937164E-05  3.188435E-02 -4.442261E-07  3.178801E-04  2.790221E-02  3.396715E-04
# Covariance matrix:
  2.2095E-13 -8.1757E-14  1.1916E-15 -2.1311E-15  1.4551E-13 -1.7279E-13
 -8.1757E-14  1.8915E-13 -3.2922E-15  7.6728E-16  3.1311E-13  8.6166E-13
  1.1916E-15 -3.2922E-15  8.1720E-14 -2.0004E-14 -5.5688E-15 -1.5643E-14
 -2.1311E-15  7.6728E-16 -2.0004E-14  8.6099E-15 -2.6643E-15  1.7327E-15
  1.4551E-13  3.1311E-13 -5.5688E-15 -2.6643E-15  1.0830E-12  1.7549E-12
 -1.7279E-13  8.6166E-13 -1.5643E-14  1.7327E-15  1.7549E-12  4.2377E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   -7.125445  104.957895    0.108841   -0.120812   -0.967449  2456656.871088
# Heliocentric elements and errors
Epoch:              2456656.5000  =  2013/12/30
Mean Anomaly:            1.46259 +/-     0.013
Argument of Peri:      272.13732 +/-     0.021
Long of Asc Node:      190.25524 +/-     0.001
Inclination:             6.95833 +/-     0.000
Eccentricity:         0.22298372 +/-    0.0001
Semi-Major Axis:     47.36577160 +/-    0.0086
Time of Perihelion: 2456172.7571 +/-       4.3
Perihelion:          36.80397572 +/-    0.0086
Aphelion:            57.92756747 +/-    0.0118
Period (y)              325.9906 +/-      0.09
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           -9.32718824 +/-    0.0003
Ecliptic Y           35.32976796 +/-    0.0013
Ecliptic Z           -4.44565141 +/-    0.0002
Ecliptic XDOT        -0.00303818 +/-    0.0000
Ecliptic YDOT        -0.00077414 +/-    0.0000
Ecliptic ZDOT         0.00002696 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   36.80967812 +/-    0.0012
Geocenter to KBO     35.83947939 +/-    0.0013
# Hcoef:  6.95

The following table shows the complete astrometric record for 16AN278. 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 (16AN278) followed by the observatory code and reference code for the source of the astrometry.

2013 12  30.37031  07 01 39.536  +15 31 01.22  22.2G 16AN278   F51  C~347c      
2013 12  30.38554  07 01 39.464  +15 31 01.28  22.3G 16AN278   F51  C~347c      
2013 12  30.40070  07 01 39.384  +15 31 01.48  22.3G 16AN278   F51  C~347c      
2013 12  30.41591  07 01 39.291  +15 31 01.43  22.5G 16AN278   F51  C~347c      
2014 01  10.33746  07 00 37.311  +15 32 37.07  22.8G 16AN278   F51  C~347c      
2015 01  21.32858  07 07 11.015  +15 23 42.83  22.4G 16AN278   F51  C~347c      
2015 01  21.34107  07 07 10.939  +15 23 42.93  22.1G 16AN278   F51  C~347c      
2015 01  21.35357  07 07 10.893  +15 23 42.95  22.1G 16AN278   F51  C~347c      
2015 01  21.36606  07 07 10.813  +15 23 43.06  22.3G 16AN278   F51  C~347c      
2015 01  21.45061  07 07 10.347  +15 23 44.23  22.5G 16AN278   F51  C~347c      
2015 01  21.46340  07 07 10.267  +15 23 44.36  22.4G 16AN278   F51  C~347c      
2015 01  21.47620  07 07 10.213  +15 23 44.48  22.1G 16AN278   F51  C~347c      
2015 01  21.48912  07 07 10.144  +15 23 44.48  23.1G 16AN278   F51  C~347c      
2015 02  19.23498  07 04 56.027  +15 30 24.08  22.4G 16AN278   F51  C~347c      
2015 02  19.24702  07 04 55.970  +15 30 24.09  22.7G 16AN278   F51  C~347c      
2015 02  19.25908  07 04 55.928  +15 30 24.37  22.6G 16AN278   F51  C~347c      
2015 02  19.27112  07 04 55.866  +15 30 24.52  22.1G 16AN278   F51  C~347c      
2016 01  12.33359  07 15 34.314  +15 09 59.91  22.2G 16AN278   F51  C~347c      
2016 01  12.34542  07 15 34.261  +15 09 59.80  22.3G 16AN278   F51  C~347c      
2016 01  12.35720  07 15 34.183  +15 10 00.08  22.7G 16AN278   F51  C~347c      
2016 01  12.36903  07 15 34.123  +15 10 00.12  22.7G 16AN278   F51  C~347c      
2016 01  31.31378  07 13 51.323  +15 14 09.39  22.3G 16AN278   F51  C~347c      
2016 01  31.33770  07 13 51.206  +15 14 09.75  22.5G 16AN278   F51  C~347c      
2016 01  31.34980  07 13 51.137  +15 14 10.11  22.2G 16AN278   F51  C~347c      
2016 02  10.27542  07 13 03.465  +15 16 37.05  22.4G 16AN278   F51  C~347c      
2016 02  10.28842  07 13 03.396  +15 16 37.14  21.8G 16AN278   F51  C~347c      
2016 02  10.30162  07 13 03.344  +15 16 37.29  22.4G 16AN278   F51  C~347c      
2016 02  10.31494  07 13 03.289  +15 16 37.62  22.6G 16AN278   F51  C~347c      
2016 02  12.27946  07 12 54.626  +15 17 07.25  22.1G 16AN278   F51  C~347c      
2016 02  12.29136  07 12 54.547  +15 17 07.55  22.9G 16AN278   F51  C~347c      
2016 02  12.30336  07 12 54.486  +15 17 07.52  22.1G 16AN278   F51  C~347c      
2016 02  12.31540  07 12 54.435  +15 17 07.99  21.9G 16AN278   F51  C~347c      
2017 01  26.44416  07 21 42.541  +15 00 31.40  23.0G 16AN278   F51  C~347c      
2017 01  26.45478  07 21 42.474  +15 00 31.31  22.7G 16AN278   F51  C~347c      
2017 01  26.46541  07 21 42.413  +15 00 31.71  22.7G 16AN278   F51  C~347c      
2017 01  26.47604  07 21 42.356  +15 00 31.76  22.4G 16AN278   F51  C~347c      
2020 09  29.61017  07 56 02.993  +14 01 35.57  22.6w 16AN278   F51  C~4AIt      
2020 09  29.61921  07 56 03.016  +14 01 35.22  22.4w 16AN278   F51  C~4AIt      
2020 09  29.62373  07 56 03.035  +14 01 35.39  22.6w 16AN278   F51  C~4AIt      
2020 12  09.410030 07 55 27.631  +13 51 41.05  22.7G 16AN278   G37  C~4UKB      
2020 12  09.461500 07 55 27.405  +13 51 41.08        16AN278   G37  C~4UKB      
2020 12  09.506160 07 55 27.238  +13 51 41.19        16AN278   G37  C~4UKB      

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    -0.26       0.00     0.16
     2   0.0000      0.00    -0.03       0.00     0.10
     3   0.0001      0.00     0.08       0.00     0.18
     4   0.0001      0.00    -0.01       0.00     0.02
     5   0.0300      0.00    -0.01       0.00     0.00
     6   1.0594      0.00    -0.10       0.00     0.08
     7   1.0595      0.00    -0.20       0.00     0.03
     8   1.0595      0.00     0.14       0.00    -0.11
     9   1.0595      0.00    -0.02       0.00    -0.16
    10   1.0598      0.00    -0.00       0.00    -0.04
    11   1.0598      0.00    -0.14       0.00    -0.06
    12   1.0598      0.00     0.11       0.00    -0.10
    13   1.0599      0.00     0.14       0.00    -0.26
    14   1.1386      0.00     0.26       0.00     0.13
    15   1.1386      0.00     0.08       0.00    -0.04
    16   1.1386      0.00     0.13       0.00     0.06
    17   1.1387      0.00    -0.12       0.00     0.03
    18   2.0341      0.00    -0.05       0.00     0.18
    19   2.0342      0.00     0.17       0.00    -0.07
    20   2.0342      0.00     0.01       0.00     0.07
    21   2.0342      0.00     0.13       0.00    -0.03
    22   2.0861      0.00    -0.08       0.00    -0.05
    23   2.0862      0.00     0.02       0.00    -0.03
    24   2.0862      0.00    -0.08       0.00     0.15
    25   2.1134      0.00    -0.02       0.00     0.08
    26   2.1134      0.00    -0.16       0.00    -0.03
    27   2.1134      0.00    -0.03       0.00    -0.08
    28   2.1135      0.00     0.06       0.00     0.05
    29   2.1188      0.00     0.33       0.00    -0.11
    30   2.1189      0.00    -0.06       0.00     0.00
    31   2.1189      0.00    -0.17       0.00    -0.21
    32   2.1189      0.00    -0.14       0.00     0.08
    33   3.0748      0.00     0.09       0.00     0.06
    34   3.0748      0.00    -0.06       0.00    -0.18
    35   3.0749      0.00    -0.11       0.00     0.06
    36   3.0749      0.00    -0.10       0.00    -0.04
    37   6.7495      0.00     0.16       0.00     0.02
    38   6.7495      0.00     0.07       0.00    -0.16
    39   6.7495      0.00     0.14       0.00     0.10
    40   6.9433      0.00    -0.01       0.00     0.21
    41   6.9434      0.00    -0.23       0.00     0.01
    42   6.9436      0.00     0.00       0.00    -0.07

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.

16AN278    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        47.347    47.347    47.347
ecceobj         0.222     0.222     0.222
incobj          6.952     6.952     6.952
qmin           35.802    35.802    35.802
qmax           58.985    58.986    58.988
amean          47.034    47.033    47.034
amin           46.607    46.601    46.600
amax           47.602    47.602    47.603
emean           0.219     0.219     0.219
emin            0.202     0.202     0.202
emax            0.239     0.239     0.239
imean           7.493     7.494     7.494
imin            6.626     6.628     6.627
imax            8.586     8.586     8.586
excite_mean     0.255     0.255     0.255
fracstop        1.000     1.000     1.000
cjmean          3.058     3.058     3.058

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       180.7     180.6     180.6
kozaiamp        180.0     180.0     180.0