Orbit Fit and Astrometric record for 17BP237

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: 17BP237   
# Created Thu Oct 31 01:10:31 2024
# Orbit generated from Bernstein formalism
# Fitting     21 observations of     22
# Arc:   2.45y
# First observation: 2016/11/25
#  Last observation: 2019/05/09
Preliminary a, adot, b, bdot, g, gdot:
   0.000059   0.019830   0.000022  -0.001473   0.022011   0.000000
# Chi-squared of fit:     8.69 DOF:     36 RMS:  0.11
# Min/Max residuals:    -0.28    0.27
# Exact a, adot, b, bdot, g, gdot:
  1.298399E-05  1.935367E-02 -1.719214E-06 -1.442654E-03  2.143881E-02 -3.300142E-03
# Covariance matrix:
  3.5610E-13  6.8903E-13  1.1342E-13 -1.1803E-13  9.1096E-13  2.0163E-11
  6.8903E-13  2.3682E-12  3.3318E-13 -4.0267E-13  2.6586E-12  7.0853E-11
  1.1342E-13  3.3318E-13  1.4484E-13 -1.0383E-13  4.0117E-13  9.6650E-12
 -1.1803E-13 -4.0267E-13 -1.0383E-13  1.6309E-13 -4.4206E-13 -1.3902E-11
  9.1096E-13  2.6586E-12  4.0117E-13 -4.4206E-13  3.2145E-12  7.6423E-11
  2.0163E-11  7.0853E-11  9.6650E-12 -1.3902E-11  7.6423E-11  2.5169E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
   -9.909976  150.732533    0.990739   -0.007940   -0.046572  2457718.123079
# Heliocentric elements and errors
Epoch:              2457710.5000  =  2016/11/18
Mean Anomaly:          281.45430 +/-     0.320
Argument of Peri:      346.15341 +/-     0.125
Long of Asc Node:      264.12038 +/-     0.004
Inclination:            10.86447 +/-     0.000
Eccentricity:         0.19006402 +/-    0.0025
Semi-Major Axis:     46.79388213 +/-    0.0474
Time of Perihelion: 2483220.0016 +/-      96.4
Perihelion:          37.90004867 +/-    0.1223
Aphelion:            55.68771558 +/-    0.1291
Period (y)              320.1045 +/-      0.49
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -39.64358443 +/-    0.0033
Ecliptic Y           23.34673567 +/-    0.0019
Ecliptic Z           -8.02764327 +/-    0.0007
Ecliptic XDOT        -0.00081617 +/-    0.0000
Ecliptic YDOT        -0.00238127 +/-    0.0000
Ecliptic ZDOT        -0.00010900 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   46.70253643 +/-    0.0030
Geocenter to KBO     46.64438983 +/-    0.0039
# Hcoef:  8.91

The following table shows the complete astrometric record for 17BP237. 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 (17BP237) followed by the observatory code and reference code for the source of the astrometry.

2016 11  25.622290 09 57 11.09   +01 55 45.7         17BP237   T09  C~83Er      
2016 11  25.637913 09 57 11.07   +01 55 45.2         17BP237   T09  C~83Er      
2016 12  25.51570  09 56 36.98   +01 51 46.7   25.9r 17BP237   T09  C~83Er      
2016 12  25.59037  09 56 36.82   +01 51 46.8   25.7i 17BP237   T09  C~83Er      
2016 12  25.61265  09 56 36.74   +01 51 46.5   25.4i 17BP237   T09  C~83Er      
2017 01  21.43628  09 55 13.51   +01 54 39.2   25.2z 17BP237   T09  C~83Er      
2017 01  21.45558  09 55 13.42   +01 54 39.4   24.7z 17BP237   T09  C~83Er      
2017 01  21.48215  09 55 13.32   +01 54 39.7   24.9z 17BP237   T09  C~83Er      
2017 01  21.50822  09 55 13.22   +01 54 40.0   24.5z 17BP237   T09  C~83Er      
2017 01  21.53429  09 55 13.12   +01 54 40.4   24.9z 17BP237   T09  C~83Er      
2017 01  23.36023  09 55 06.16   +01 55 04.6   26.0r 17BP237   T09  C~83Er      
2017 01  23.48266  09 55 05.69   +01 55 06.1   25.1i 17BP237   T09  C~83Er      
2017 01  23.51704  09 55 05.54   +01 55 06.7   26.0i 17BP237   T09  C~83Er      
2017 01  23.52922  09 55 05.51   +01 55 06.7   25.3i 17BP237   T09  C~83Er      
2017 01  23.55808  09 55 05.40   +01 55 07.1   25.7i 17BP237   T09  C~83Er      
2017 01  30.43553  09 54 38.13   +01 56 50.9   25.8i 17BP237   T09  C~83Er      
2017 01  30.45764  09 54 38.06   +01 56 51.6   25.7i 17BP237   T09  C~83Er      
2017 01  30.52778  09 54 37.75   +01 56 52.2   25.6z 17BP237   T09  C~83Er      
2019 02  04.395762 10 02 37.76   +01 00 58.7         17BP237   T09  C~83Er      
2019 05  09.280721 09 57 58.42   +01 35 47.8         17BP237   T09  C~83Er      
2019 05  09.302341 09 57 58.42   +01 35 48.1         17BP237   T09  C~83Er      
2019 05  09.375023 09 57 58.40   +01 35 49.0         17BP237   T09  C~83Er      

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     0.27       0.00     0.14
     2   0.0000     -0.11     0.08      -0.57    -0.21
     3   0.0818   -396.60    -0.18    -401.66     0.01
     4   0.0820   -398.88     0.00    -402.40     0.21
     5   0.0821   -399.90    -0.28    -403.10    -0.21
     6   0.1555  -1630.10     0.18    -674.15     0.12
     7   0.1556  -1631.44    -0.02    -674.43    -0.00
     8   0.1557  -1632.95     0.02    -674.67    -0.03
     9   0.1557  -1634.46     0.04    -674.91    -0.06
    10   0.1558  -1636.00     0.02    -675.06     0.01
    11   0.1608  -1742.27    -0.13    -688.56     0.08
    12   0.1612  -1749.40     0.05    -689.60    -0.03
    13   0.1612  -1751.72    -0.20    -689.81     0.02
    14   0.1613  -1752.14     0.10    -689.97    -0.04
    15   0.1614  -1753.82     0.15    -690.17    -0.02
    16   0.1802  -2173.30    -0.10    -734.63     0.11
    17   0.1802  -2174.53 (   0.09)   -734.34 (   0.53)
    18   0.1804  -2179.10     0.00    -735.39    -0.09
    19   2.1924   5736.93    -0.01   -1380.27    -0.04
    20   2.4494   1081.44    -0.03    -876.96     0.04
    21   2.4495   1081.34     0.04    -876.68     0.06
    22   2.4497   1080.74     0.00    -875.94    -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.

17BP237    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        46.478    46.594    46.367
ecceobj         0.186     0.192     0.179
incobj         10.841    10.840    10.841
qmin           37.046    36.731    37.172
qmax           56.544    57.257    56.177
amean          46.596    46.735    46.484
amin           46.170    46.312    46.082
amax           47.090    47.227    46.966
emean           0.190     0.197     0.183
emin            0.176     0.183     0.170
emax            0.203     0.212     0.198
imean          12.343    12.338    12.346
imin           11.723    11.683    11.735
imax           12.889    12.889    12.885
excite_mean     0.286     0.291     0.282
fracstop        1.000     1.000     1.000
cjmean          3.032     3.030     3.034

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       171.7     171.8     171.8
kozaiamp        179.9     180.0     180.0