Orbit Fit and Astrometric record for 17BM233

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: 17BM233   
# Created Tue Apr  1 01:11:01 2025
# Orbit generated from Bernstein formalism
# Fitting     30 observations of     30
# Arc:   0.90y
# First observation: 2016/04/02
#  Last observation: 2017/02/23
Preliminary a, adot, b, bdot, g, gdot:
  -0.000064   0.024171  -0.000000  -0.000237   0.024078   0.000000
# Chi-squared of fit:    10.99 DOF:     54 RMS:  0.11
# Min/Max residuals:    -0.29    0.22
# Exact a, adot, b, bdot, g, gdot:
  1.469848E-05  2.412434E-02 -4.633898E-09 -2.361091E-04  2.451010E-02  1.176047E-04
# Covariance matrix:
  3.3084E-13  3.6662E-12  2.1271E-14 -7.9890E-14  1.6896E-12  1.3990E-10
  3.6662E-12  3.6348E-10  1.5521E-12 -7.0004E-12  1.2606E-10  1.1973E-08
  2.1271E-14  1.5521E-12  1.9037E-13 -2.5928E-13  5.5364E-13  5.1683E-11
 -7.9890E-14 -7.0004E-12 -2.5928E-13  5.2799E-13 -2.4458E-12 -2.3137E-10
  1.6896E-12  1.2606E-10  5.5364E-13 -2.4458E-12  4.4845E-11  4.1936E-09
  1.3990E-10  1.1973E-08  5.1683E-11 -2.3137E-10  4.1936E-09  3.9607E-07
#      lat0       lon0       xBary       yBary       zBary        JD0
    3.054897 -175.368958   -0.141320    0.052660   -0.984130  2457480.904541
# Heliocentric elements and errors
Epoch:              2457480.5000  =  2016/04/02
Mean Anomaly:           14.84690 +/-    42.850
Argument of Peri:       84.97413 +/-    45.861
Long of Asc Node:       84.01188 +/-     0.038
Inclination:             3.03646 +/-     0.000
Eccentricity:         0.03205512 +/-    0.0079
Semi-Major Axis:     43.12088029 +/-    0.0368
Time of Perihelion: 2453215.0655 +/-   12310.5
Perihelion:          41.73863520 +/-    0.3425
Aphelion:            44.50312539 +/-    0.3427
Period (y)              283.1650 +/-      0.36
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -41.58314953 +/-    0.0111
Ecliptic Y           -3.51250191 +/-    0.0009
Ecliptic Z            2.17434170 +/-    0.0006
Ecliptic XDOT         0.00020320 +/-    0.0001
Ecliptic YDOT        -0.00269412 +/-    0.0000
Ecliptic ZDOT        -0.00002563 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.78784221 +/-    0.0110
Geocenter to KBO     40.79950555 +/-    0.0111
# Hcoef:  8.75

The following table shows the complete astrometric record for 17BM233. 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 (17BM233) followed by the observatory code and reference code for the source of the astrometry.

2016 04  02.403752 12 21 50.85   +00 57 50.5         17BM233   T09  C~81Bn      
2016 04  02.523267 12 21 50.30   +00 57 54.0         17BM233   T09  C~81Bn      
2016 04  04.35736  12 21 42.13   +00 58 45.5   26.3g 17BM233   T09  C~89UT      
2016 04  04.39588  12 21 41.96   +00 58 46.3   26.0g 17BM233   T09  C~89UT      
2016 04  04.41948  12 21 41.86   +00 58 46.8   26.2g 17BM233   T09  C~89UT      
2016 06  04.26227  12 18 32.48   +01 16 03.8   24.6z 17BM233   T09  C~8COq      
2016 06  04.27850  12 18 32.47   +01 16 04.2   24.7z 17BM233   T09  C~8COq      
2016 06  04.29466  12 18 32.46   +01 16 04.2   24.3z 17BM233   T09  C~8COq      
2016 06  05.317193 12 18 31.38   +01 16 06.3         17BM233   T09  C~81Bn      
2016 06  05.345518 12 18 31.35   +01 16 06.3         17BM233   T09  C~81Bn      
2017 01  23.62432  12 30 57.36   -00 04 23.1   25.1i 17BM233   T09  C~7zpa      
2017 01  23.63041  12 30 57.36   -00 04 23.1   25.0i 17BM233   T09  C~7zpa      
2017 01  23.63574  12 30 57.35   -00 04 23.1   24.4i 17BM233   T09  C~7zpa      
2017 01  23.64112  12 30 57.33   -00 04 23.1   24.7i 17BM233   T09  C~7zpa      
2017 01  23.64653  12 30 57.31   -00 04 22.7   24.7i 17BM233   T09  C~7zpa      
2017 01  23.65191  12 30 57.32   -00 04 22.7   24.8i 17BM233   T09  C~7zpa      
2017 01  23.65460  12 30 57.31   -00 04 22.9   24.6i 17BM233   T09  C~7zpa      
2017 01  28.60612  12 30 49.25   -00 03 09.8   24.7z 17BM233   T09  C~7zpa      
2017 01  28.61148  12 30 49.23   -00 03 09.8   24.5z 17BM233   T09  C~7zpa      
2017 01  28.61691  12 30 49.22   -00 03 09.8   24.6z 17BM233   T09  C~7zpa      
2017 01  28.62228  12 30 49.21   -00 03 09.7   24.4z 17BM233   T09  C~7zpa      
2017 01  28.63916  12 30 49.17   -00 03 09.3   24.1z 17BM233   T09  C~7zpa      
2017 02  01.64621  12 30 41.13   -00 02 01.6   24.6i 17BM233   T09  C~7zpa      
2017 02  01.64893  12 30 41.12   -00 02 01.6   24.8i 17BM233   T09  C~7zpa      
2017 02  01.65707  12 30 41.11   -00 02 01.5   25.4i 17BM233   T09  C~7zpa      
2017 02  01.65978  12 30 41.10   -00 02 01.3   24.5i 17BM233   T09  C~7zpa      
2017 02  01.66249  12 30 41.10   -00 02 01.3   25.0i 17BM233   T09  C~7zpa      
2017 02  23.53583  12 29 36.81   +00 06 04.7   25.0r 17BM233   T09  C~7zpa      
2017 02  23.57406  12 29 36.67   +00 06 05.5   24.8r 17BM233   T09  C~7zpa      
2017 02  23.60592  12 29 36.55   +00 06 06.5   25.2r 17BM233   T09  C~7zpa      

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     0.18       0.00    -0.03
     2   0.0003     -8.96     0.03      -0.06     0.06
     3   0.0053   -141.87    -0.24      -1.37     0.15
     4   0.0055   -144.53    -0.08      -1.64    -0.08
     5   0.0055   -146.10     0.08      -1.78    -0.18
     6   0.1721  -3164.90    -0.03    -175.60    -0.25
     7   0.1721  -3165.19    -0.04    -175.29     0.14
     8   0.1722  -3165.33     0.09    -175.35     0.15
     9   0.1750  -3181.04    -0.01    -179.84     0.04
    10   0.1751  -3181.45     0.02    -180.02    -0.00
    11   0.8110   9011.54    -0.02    -175.19     0.07
    12   0.8110   9011.54     0.14    -175.19     0.05
    13   0.8110   9011.41     0.14    -175.25    -0.03
    14   0.8111   9011.13     0.00    -175.37    -0.17
    15   0.8111   9010.69    -0.29    -175.12     0.06
    16   0.8111   9010.83    -0.01    -175.06     0.10
    17   0.8111   9010.77    -0.00    -175.30    -0.15
    18   0.8246   8870.53     0.16    -156.16     0.22
    19   0.8247   8870.25     0.06    -156.28     0.08
    20   0.8247   8870.12     0.10    -156.34     0.00
    21   0.8247   8869.94     0.10    -156.31     0.02
    22   0.8247   8869.23    -0.05    -156.18     0.09
    23   0.8357   8731.41    -0.09    -141.88    -0.01
    24   0.8357   8731.28    -0.12    -141.94    -0.08
    25   0.8357   8731.10     0.01    -141.90    -0.07
    26   0.8357   8730.88    -0.10    -141.78     0.04
    27   0.8358   8730.88     0.00    -141.78     0.04
    28   0.8956   7651.15    -0.04     -78.30    -0.02
    29   0.8957   7648.90     0.05     -78.40    -0.19
    30   0.8958   7646.85    -0.04     -78.19    -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.

17BM233    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        42.682    43.151    42.583
ecceobj         0.023     0.084     0.033
incobj          3.036     3.035     3.036
qmin           40.658    37.986    40.783
qmax           45.285    48.959    45.006
amean          42.880    43.346    42.786
amin           42.556    42.996    42.455
amax           43.211    43.728    43.123
emean           0.028     0.096     0.024
emin            0.008     0.074     0.003
emax            0.049     0.120     0.044
imean           1.264     1.524     1.151
imin            0.174     0.199     0.020
imax            2.155     2.664     2.019
excite_mean     0.036     0.100     0.033
fracstop        1.000     1.000     1.000
cjmean          3.087     3.082     3.086

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       187.6     173.3     194.7
kozaiamp        180.0     179.9     180.0