Orbit Fit and Astrometric record for 17BG237

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: 17BG237   
# Created Tue Apr  1 01:11:02 2025
# Orbit generated from Bernstein formalism
# Fitting     36 observations of     36
# Arc:  98.87d
# First observation: 2016/11/25
#  Last observation: 2017/03/04
Preliminary a, adot, b, bdot, g, gdot:
   0.000005   0.036955   0.000028  -0.004677   0.029292   0.000000
# Chi-squared of fit:    45.40 DOF:     66 RMS:  0.20
# Min/Max residuals:    -0.44    0.63
# Exact a, adot, b, bdot, g, gdot:
  1.965723E-05  3.550380E-02 -3.010391E-06 -4.549954E-03  2.841358E-02  1.791751E-03
# Covariance matrix:
  4.5755E-13 -6.1175E-12 -3.7670E-14 -5.8970E-13 -9.4378E-13  9.0741E-12
 -6.1175E-12  3.0660E-10  5.7272E-12  1.1421E-11  1.0156E-10  7.0428E-09
 -3.7670E-14  5.7272E-12  3.8010E-13 -1.2085E-12  2.2433E-12  1.8698E-10
 -5.8970E-13  1.1421E-11 -1.2085E-12  9.2764E-12  1.7067E-12 -1.1061E-10
 -9.4378E-13  1.0156E-10  2.2433E-12  1.7067E-12  3.8297E-11  3.0565E-09
  9.0741E-12  7.0428E-09  1.8698E-10 -1.1061E-10  3.0565E-09  2.8198E-07
#      lat0       lon0       xBary       yBary       zBary        JD0
   -9.849163  151.868589    0.991477   -0.004541   -0.027284  2457718.126915
# Heliocentric elements and errors
Epoch:              2457710.5000  =  2016/11/18
Mean Anomaly:            1.44113 +/-     1.030
Argument of Peri:      228.76186 +/-     2.803
Long of Asc Node:      278.15389 +/-     0.030
Inclination:            12.39592 +/-     0.005
Eccentricity:         0.42433521 +/-    0.0029
Semi-Major Axis:     61.16666296 +/-    0.2303
Time of Perihelion: 2457011.0242 +/-     499.9
Perihelion:          35.21149409 +/-    0.2197
Aphelion:            87.12183183 +/-    0.3718
Period (y)              478.3881 +/-      2.70
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -30.14013028 +/-    0.0067
Ecliptic Y           17.23252935 +/-    0.0036
Ecliptic Z           -6.02032358 +/-    0.0013
Ecliptic XDOT        -0.00169455 +/-    0.0000
Ecliptic YDOT        -0.00297881 +/-    0.0000
Ecliptic ZDOT        -0.00046154 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   35.23679635 +/-    0.0060
Geocenter to KBO     35.19444014 +/-    0.0077
# Hcoef: 10.06

The following table shows the complete astrometric record for 17BG237. 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 (17BG237) followed by the observatory code and reference code for the source of the astrometry.

2016 11  25.626126 10 01 28.02   +01 35 44.4         17BG237   T09  C~85Iq      
2016 11  25.629956 10 01 28.02   +01 35 44.2         17BG237   T09  C~85Iq      
2016 11  25.637913 10 01 28.02   +01 35 44.0         17BG237   T09  C~85Iq      
2017 01  02.50080  10 00 31.94   +01 28 14.1   25.7i 17BG237   T09  C~82nB      
2017 01  02.50463  10 00 31.91   +01 28 14.1   25.6i 17BG237   T09  C~82nB      
2017 01  02.51228  10 00 31.89   +01 28 14.1   25.4i 17BG237   T09  C~82nB      
2017 01  02.52725  10 00 31.85   +01 28 14.1   25.5i 17BG237   T09  C~82nB      
2017 01  02.53399  10 00 31.82   +01 28 14.1   25.6i 17BG237   T09  C~82nB      
2017 01  02.60039  10 00 31.60   +01 28 14.1   25.8g 17BG237   T09  C~82nB      
2017 01  21.43628  09 59 15.49   +01 30 31.7   25.8z 17BG237   T09  C~82nB      
2017 01  21.45826  09 59 15.39   +01 30 32.0   26.0z 17BG237   T09  C~82nB      
2017 01  21.49713  09 59 15.21   +01 30 32.7   26.1z 17BG237   T09  C~82nB      
2017 01  21.50822  09 59 15.17   +01 30 32.9   25.4z 17BG237   T09  C~82nB      
2017 01  21.51947  09 59 15.10   +01 30 33.2   25.1z 17BG237   T09  C~82nB      
2017 01  21.55646  09 59 14.93   +01 30 33.7   25.6z 17BG237   T09  C~82nB      
2017 01  23.37416  09 59 06.40   +01 30 58.2   25.0r 17BG237   T09  C~82nB      
2017 01  23.39391  09 59 06.34   +01 30 59.0   24.9r 17BG237   T09  C~82nB      
2017 01  23.43372  09 59 06.14   +01 30 59.4   25.3r 17BG237   T09  C~82nB      
2017 01  23.45235  09 59 06.04   +01 30 59.9   25.7r 17BG237   T09  C~82nB      
2017 01  23.50215  09 59 05.78   +01 31 00.0   24.6i 17BG237   T09  C~82nB      
2017 01  23.51704  09 59 05.71   +01 31 00.7   24.9i 17BG237   T09  C~82nB      
2017 01  30.43553  09 58 31.76   +01 32 53.8   25.2i 17BG237   T09  C~82nB      
2017 01  30.45764  09 58 31.61   +01 32 54.1   25.5i 17BG237   T09  C~82nB      
2017 01  30.50184  09 58 31.43   +01 32 55.4   24.8z 17BG237   T09  C~82nB      
2017 01  30.52778  09 58 31.27   +01 32 55.4   24.8z 17BG237   T09  C~82nB      
2017 01  30.56478  09 58 31.07   +01 32 56.1   25.3z 17BG237   T09  C~82nB      
2017 01  30.59058  09 58 30.94   +01 32 56.5   24.9z 17BG237   T09  C~82nB      
2017 02  23.46720  09 56 25.16   +01 42 15.7   25.3r 17BG237   T09  C~82nB      
2017 02  23.48087  09 56 25.12   +01 42 16.2   25.9r 17BG237   T09  C~82nB      
2017 02  23.49450  09 56 25.04   +01 42 16.2   25.6r 17BG237   T09  C~82nB      
2017 02  23.51193  09 56 24.92   +01 42 17.1   25.7r 17BG237   T09  C~82nB      
2017 03  04.26703  09 55 39.60   +01 46 26.3   24.6z 17BG237   T09  C~82nB      
2017 03  04.29255  09 55 39.44   +01 46 27.5   25.4z 17BG237   T09  C~82nB      
2017 03  04.45601  09 55 38.60   +01 46 32.2   25.9i 17BG237   T09  C~82nB      
2017 03  04.47782  09 55 38.51   +01 46 32.8   25.1i 17BG237   T09  C~82nB      
2017 03  04.49952  09 55 38.35   +01 46 33.3   25.3i 17BG237   T09  C~82nB      

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     0.02       0.00     0.10
     2   0.0000      0.07     0.03      -0.19    -0.01
     3   0.0000      0.14    -0.01      -0.37    -0.03
     4   0.1037   -629.44     0.00    -716.72     0.04
     5   0.1037   -629.87    -0.23    -716.88    -0.06
     6   0.1037   -630.15    -0.14    -716.99    -0.03
     7   0.1038   -630.71     0.02    -717.20     0.01
     8   0.1038   -631.13    -0.07    -717.36    -0.03
     9   0.1040   -634.22     0.07    -718.51    -0.06
    10   0.1555  -1751.29    -0.08    -989.98    -0.29
    11   0.1556  -1752.80    -0.03    -990.22    -0.26
    12   0.1557  -1755.58    -0.03    -990.51    -0.06
    13   0.1557  -1756.21     0.13    -990.54     0.06
    14   0.1558  -1757.30    -0.15    -990.62     0.11
    15   0.1559  -1759.86    -0.08    -991.05     0.15
    16   0.1608  -1888.25     0.10   -1012.96    -0.40
    17   0.1609  -1889.37     0.42   -1012.53     0.27
    18   0.1610  -1892.32     0.37   -1013.20     0.07
    19   0.1611  -1893.90     0.15   -1013.26     0.23
    20   0.1612  -1897.59     0.11   -1014.53    -0.44
    21   0.1612  -1898.81    -0.03   -1014.25     0.03
    22   0.1802  -2415.28     0.14   -1086.84     0.20
    23   0.1802  -2417.50    -0.33   -1087.35    -0.08
    24   0.1804  -2420.48     0.16   -1087.08     0.63
    25   0.1804  -2422.73    -0.04   -1087.92     0.05
    26   0.1805  -2425.78    -0.19   -1088.31     0.02
    27   0.1806  -2427.75    -0.12   -1088.62    -0.03
    28   0.2460  -4390.64    -0.36   -1225.96    -0.14
    29   0.2460  -4391.38     0.07   -1225.70     0.15
    30   0.2460  -4392.50     0.11   -1226.12    -0.23
    31   0.2461  -4394.50    -0.41   -1225.91     0.02
    32   0.2701  -5118.63     0.49   -1230.55    -0.12
    33   0.2701  -5121.30    -0.08   -1230.27     0.15
    34   0.2706  -5134.75    -0.01   -1230.28     0.07
    35   0.2706  -5136.23     0.31   -1230.19     0.15
    36   0.2707  -5138.65    -0.32   -1230.56    -0.23

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.

17BG237    quality flag:2

Type:       SCATNEAR     3:1EE  SCATNEAR

axisobj        60.730    62.693    59.311
ecceobj         0.419     0.443     0.403
incobj         12.379    12.368    12.391
qmin           34.273    34.240    34.341
qmax           90.260    92.777    85.464
amean          61.153    62.629    59.180
amin           59.861    61.653    58.254
amax           62.636    63.863    60.264
emean           0.425     0.441     0.402
emin            0.404     0.428     0.384
emax            0.443     0.454     0.420
imean          13.659    14.011    14.074
imin           12.625    13.782    12.955
imax           14.538    14.202    15.063
excite_mean     0.486     0.503     0.470
fracstop        1.000     1.000     1.000
cjmean          3.000     2.991     2.999

libcent 0      -180.0     179.0    -180.0
libamp  0      -180.0     154.6    -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       198.1     185.6     179.3
kozaiamp        179.9     179.9     180.0