Orbit Fit and Astrometric record for 17BS237

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: 17BS237   
# Created Tue Apr  1 01:11:02 2025
# Orbit generated from Bernstein formalism
# Fitting     33 observations of     33
# Arc:   3.24y
# First observation: 2015/12/05
#  Last observation: 2019/03/03
Preliminary a, adot, b, bdot, g, gdot:
   0.000194   0.023791   0.000095   0.007744   0.023104   0.000000
# Chi-squared of fit:    22.59 DOF:     60 RMS:  0.15
# Min/Max residuals:    -0.43    0.31
# Exact a, adot, b, bdot, g, gdot:
  1.551505E-05  2.418606E-02  7.249691E-06  7.869842E-03  2.366529E-02  9.922597E-03
# Covariance matrix:
  4.3998E-13 -6.0291E-13  1.0959E-13 -1.8179E-13 -2.6253E-13 -6.9452E-12
 -6.0291E-13  1.5259E-12 -2.1607E-13  4.6206E-13  1.5883E-12  1.6893E-11
  1.0959E-13 -2.1607E-13  2.0683E-13 -1.6937E-13 -1.3519E-13 -2.8653E-12
 -1.8179E-13  4.6206E-13 -1.6937E-13  2.2520E-13  4.4645E-13  5.5817E-12
 -2.6253E-13  1.5883E-12 -1.3519E-13  4.4645E-13  2.6193E-12  1.5427E-11
 -6.9452E-12  1.6893E-11 -2.8653E-12  5.5817E-12  1.5427E-11  2.0718E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -8.675704  149.525377    0.961583   -0.033886   -0.223351  2457362.127513
# Heliocentric elements and errors
Epoch:              2457360.5000  =  2015/12/04
Mean Anomaly:           17.53327 +/-     0.024
Argument of Peri:      273.53471 +/-     0.040
Long of Asc Node:      173.50348 +/-     0.001
Inclination:            19.55498 +/-     0.001
Eccentricity:         0.53444982 +/-    0.0006
Semi-Major Axis:     75.45486537 +/-    0.0672
Time of Perihelion: 2445700.7389 +/-       1.9
Perihelion:          35.12802625 +/-    0.0544
Aphelion:           115.78170450 +/-    0.1124
Period (y)              655.4493 +/-      0.88
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -35.71289258 +/-    0.0025
Ecliptic Y           22.12674938 +/-    0.0014
Ecliptic Z           -6.37369188 +/-    0.0004
Ecliptic XDOT        -0.00251662 +/-    0.0000
Ecliptic YDOT        -0.00177318 +/-    0.0000
Ecliptic ZDOT         0.00072693 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.49267799 +/-    0.0022
Geocenter to KBO     42.25598774 +/-    0.0029
# Hcoef:  8.24

The following table shows the complete astrometric record for 17BS237. 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 (17BS237) followed by the observatory code and reference code for the source of the astrometry.

2015 12  05.626724 09 54 24.87   +03 29 56.7         17BS237   T14  C~83Er      
2015 12  05.629664 09 54 24.86   +03 29 56.9         17BS237   T14  C~83Er      
2015 12  05.632624 09 54 24.88   +03 29 57.0         17BS237   T14  C~83Er      
2016 12  23.51489  09 59 48.38   +03 26 38.9   24.1z 17BS237   T09  C~83Er      
2016 12  23.58584  09 59 48.23   +03 26 38.9   24.6z 17BS237   T09  C~83Er      
2016 12  23.63065  09 59 48.09   +03 26 39.4   25.0z 17BS237   T09  C~83Er      
2016 12  25.53845  09 59 44.04   +03 26 49.9   25.2r 17BS237   T09  C~83Er      
2016 12  25.60536  09 59 43.89   +03 26 50.3   24.3i 17BS237   T09  C~83Er      
2017 01  21.42316  09 58 20.36   +03 32 42.7   24.1z 17BS237   T09  C~83Er      
2017 01  21.47486  09 58 20.17   +03 32 43.7   23.9z 17BS237   T09  C~83Er      
2017 01  21.50089  09 58 20.06   +03 32 44.2   24.0z 17BS237   T09  C~83Er      
2017 01  21.52708  09 58 19.96   +03 32 44.7   24.2z 17BS237   T09  C~83Er      
2017 01  21.54935  09 58 19.87   +03 32 45.3   24.2z 17BS237   T09  C~83Er      
2017 01  21.58938  09 58 19.71   +03 32 45.8   24.4z 17BS237   T09  C~83Er      
2017 01  23.35517  09 58 12.82   +03 33 21.5   24.6r 17BS237   T09  C~83Er      
2017 01  23.37982  09 58 12.73   +03 33 21.8   24.5r 17BS237   T09  C~83Er      
2017 01  23.40271  09 58 12.64   +03 33 22.1   24.6r 17BS237   T09  C~83Er      
2017 01  23.42310  09 58 12.56   +03 33 22.8   24.7r 17BS237   T09  C~83Er      
2017 01  23.44005  09 58 12.50   +03 33 23.1   24.7r 17BS237   T09  C~83Er      
2017 01  23.50979  09 58 12.22   +03 33 24.5   24.2i 17BS237   T09  C~83Er      
2017 01  23.54000  09 58 12.10   +03 33 25.0   24.1i 17BS237   T09  C~83Er      
2017 01  23.57255  09 58 11.97   +03 33 25.8   24.1i 17BS237   T09  C~83Er      
2017 01  23.58131  09 58 11.94   +03 33 26.2   24.4i 17BS237   T09  C~83Er      
2017 01  30.40627  09 57 44.18   +03 35 55.7   24.4i 17BS237   T09  C~83Er      
2017 01  30.45035  09 57 43.98   +03 35 56.6   24.4i 17BS237   T09  C~83Er      
2017 01  30.49455  09 57 43.80   +03 35 57.4   24.5z 17BS237   T09  C~83Er      
2017 01  30.52066  09 57 43.67   +03 35 58.3   24.5z 17BS237   T09  C~83Er      
2017 01  30.55762  09 57 43.53   +03 35 59.1   24.3z 17BS237   T09  C~83Er      
2017 01  30.60540  09 57 43.31   +03 36 00.3   24.3z 17BS237   T09  C~83Er      
2019 02  05.37652  10 08 48.97   +03 31 13.1   24.3i 17BS237   T09  C~83Er      
2019 02  05.40394  10 08 48.84   +03 31 14.0   24.4i 17BS237   T09  C~83Er      
2019 02  05.42003  10 08 48.78   +03 31 14.3   24.5i 17BS237   T09  C~83Er      
2019 03  03.297566 10 06 58.24   +03 43 19.5         17BS237   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     0.13       0.00    -0.41
     2   0.0000     -0.21    -0.05       0.14    -0.25
     3   0.0000      0.04     0.22       0.33    -0.03
     4   1.0510   4616.81     0.14    1481.47     0.30
     5   1.0512   4614.70     0.29    1480.69    -0.03
     6   1.0513   4612.56    -0.43    1480.44     0.01
     7   1.0566   4551.98    -0.02    1469.38    -0.01
     8   1.0568   4549.73     0.03    1468.98    -0.00
     9   1.1302   3253.78    -0.11    1368.69     0.08
    10   1.1303   3250.76     0.08    1368.65     0.13
    11   1.1304   3249.04    -0.02    1368.55     0.08
    12   1.1305   3247.46     0.04    1368.51     0.08
    13   1.1305   3245.99    -0.05    1368.61     0.22
    14   1.1306   3243.57     0.02    1368.25    -0.06
    15   1.1355   3134.41    -0.33    1366.23     0.10
    16   1.1355   3133.04    -0.14    1366.05    -0.05
    17   1.1356   3131.67    -0.06    1365.87    -0.20
    18   1.1357   3130.30    -0.13    1366.11     0.08
    19   1.1357   3129.36     0.00    1366.08     0.07
    20   1.1359   3124.94     0.02    1365.95     0.05
    21   1.1360   3123.08     0.08    1365.80    -0.06
    22   1.1361   3120.98     0.05    1365.88     0.07
    23   1.1361   3120.42     0.05    1366.11     0.31
    24   1.1548   2678.67     0.12    1363.33     0.15
    25   1.1549   2675.55    -0.01    1363.14    -0.04
    26   1.1550   2672.74     0.19    1362.96    -0.21
    27   1.1551   2670.60    -0.18    1363.14    -0.03
    28   1.1552   2668.36     0.09    1363.17     0.00
    29   1.1553   2664.85    -0.18    1363.16    -0.00
    30   3.1697  12131.12     0.13    4544.49    -0.18
    31   3.1698  12128.97    -0.14    4544.66    -0.05
    32   3.1699  12128.02     0.01    4544.63    -0.10
    33   3.2407  10318.69     0.16    4649.88    -0.04

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.

17BS237    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        75.296    75.490    75.101
ecceobj         0.535     0.537     0.534
incobj         19.616    19.616    19.616
qmin           34.181    34.355    34.348
qmax          117.164   117.581   117.580
amean          73.938    74.490    74.689
amin           72.599    73.030    73.303
amax           76.148    76.371    76.395
emean           0.522     0.523     0.523
emin            0.504     0.503     0.506
emax            0.539     0.541     0.539
imean          19.485    19.808    19.841
imin           18.577    18.926    18.922
imax           20.479    20.828    20.832
excite_mean     0.619     0.623     0.624
fracstop        1.000     1.000     1.000
cjmean          2.927     2.926     2.928

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       192.9     188.5     188.2
kozaiamp        180.0     179.9     180.0