Orbit Fit and Astrometric record for 17HV109

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: 17HV109   
# Created Tue Apr  1 01:11:07 2025
# Orbit generated from Bernstein formalism
# Fitting     16 observations of     16
# Arc:   2.23y
# First observation: 2017/03/06
#  Last observation: 2019/05/28
Preliminary a, adot, b, bdot, g, gdot:
   0.000036   0.024568   0.000003   0.003549   0.024703   0.000000
# Chi-squared of fit:     3.84 DOF:     26 RMS:  0.09
# Min/Max residuals:    -0.16    0.18
# Exact a, adot, b, bdot, g, gdot:
  1.605079E-05  2.459850E-02  2.523713E-06  3.566606E-03  2.459915E-02  2.725791E-03
# Covariance matrix:
  3.6726E-13  4.1495E-13 -1.0832E-14  9.6241E-14  5.2718E-13  1.1966E-11
  4.1495E-13  2.6813E-12 -5.2343E-14  5.5996E-13  1.5818E-12  7.0427E-11
 -1.0832E-14 -5.2343E-14  1.6006E-13 -8.9550E-14 -3.3675E-14 -1.4125E-12
  9.6241E-14  5.5996E-13 -8.9550E-14  2.1356E-13  3.2144E-13  1.5360E-11
  5.2718E-13  1.5818E-12 -3.3675E-14  3.2144E-13  1.4125E-12  4.0155E-11
  1.1966E-11  7.0427E-11 -1.4125E-12  1.5360E-11  4.0155E-11  1.9336E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
    6.714097 -162.647368    0.520511    0.098616   -0.836565  2457819.057921
# Heliocentric elements and errors
Epoch:              2457810.5000  =  2017/02/26
Mean Anomaly:           40.64475 +/-     0.310
Argument of Peri:      346.68165 +/-     0.487
Long of Asc Node:      158.55245 +/-     0.003
Inclination:            10.58825 +/-     0.001
Eccentricity:         0.13221672 +/-    0.0015
Semi-Major Axis:     45.68154608 +/-    0.0211
Time of Perihelion: 2445078.0625 +/-      96.8
Perihelion:          39.64168207 +/-    0.0728
Aphelion:            51.72141008 +/-    0.0744
Period (y)              308.7588 +/-      0.21
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -39.49778131 +/-    0.0019
Ecliptic Y          -11.80072577 +/-    0.0006
Ecliptic Z            4.75293144 +/-    0.0002
Ecliptic XDOT         0.00057654 +/-    0.0000
Ecliptic YDOT        -0.00269583 +/-    0.0000
Ecliptic ZDOT         0.00042963 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.49605059 +/-    0.0018
Geocenter to KBO     40.65181093 +/-    0.0020
# Hcoef:  7.91

The following table shows the complete astrometric record for 17HV109. 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 (17HV109) followed by the observatory code and reference code for the source of the astrometry.

2017 03  06.55712  13 14 14.26   -00 36 17.5   24.0r 17HV109   T09  C~7zq4      
2017 03  06.56884  13 14 14.22   -00 36 17.2   23.9r 17HV109   T09  C~7zq4      
2017 03  06.59672  13 14 14.12   -00 36 16.3   24.1r 17HV109   T09  C~7zq4      
2017 03  06.63947  13 14 13.97   -00 36 15.0   23.9r 17HV109   T09  C~7zq4      
2017 04  26.35257  13 10 38.73   -00 11 11.2   24.7g 17HV109   T09  C~7zq4      
2017 04  26.36735  13 10 38.66   -00 11 10.9   24.5g 17HV109   T09  C~7zq4      
2017 04  26.41006  13 10 38.47   -00 11 09.7   24.7g 17HV109   T09  C~7zq4      
2017 04  29.33880  13 10 26.18   -00 09 58.3   23.8z 17HV109   T09  C~7zq4      
2017 04  29.36038  13 10 26.11   -00 09 57.8   23.8z 17HV109   T09  C~7zq4      
2017 04  29.40122  13 10 25.93   -00 09 56.8   23.6z 17HV109   T09  C~7zq4      
2019 04  07.41794  13 23 08.80   -01 01 48.5   23.2i 17HV109   T09  C~7zq4      
2019 04  07.45863  13 23 08.60   -01 01 47.3   23.4i 17HV109   T09  C~7zq4      
2019 04  07.51517  13 23 08.34   -01 01 45.6   23.7i 17HV109   T09  C~7zq4      
2019 05  28.29886  13 19 46.12   -00 43 01.0   24.1z 17HV109   T09  C~7zq4      
2019 05  28.33960  13 19 45.99   -00 43 00.7   24.3z 17HV109   T09  C~7zq4      
2019 05  28.39346  13 19 45.85   -00 43 00.2   24.9z 17HV109   T09  C~7zq4      

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    -0.05       0.00    -0.05
     2   0.0000     -0.67     0.00       0.05    -0.08
     3   0.0001     -2.40    -0.01       0.31    -0.01
     4   0.0002     -4.97     0.05       0.66     0.03
     5   0.1391  -3563.06     0.08     165.78    -0.01
     6   0.1391  -3564.15     0.02     165.66    -0.10
     7   0.1392  -3567.24    -0.10     165.69    -0.01
     8   0.1472  -3764.96    -0.16     161.73     0.01
     9   0.1473  -3766.12     0.14     161.79     0.12
    10   0.1474  -3769.00     0.03     161.69     0.10
    11   2.0859   8002.77     0.16    1626.59     0.09
    12   2.0860   7999.53    -0.05    1626.56    -0.01
    13   2.0861   7995.28    -0.10    1626.65    -0.02
    14   2.2252   4759.15    -0.06    1516.32     0.11
    15   2.2253   4757.23    -0.13    1515.86    -0.09
    16   2.2254   4755.10     0.18    1515.53    -0.08

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.

17HV109    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        45.140    45.211    45.069
ecceobj         0.126     0.130     0.122
incobj         10.625    10.625    10.624
qmin           38.741    38.331    38.908
qmax           52.397    52.967    52.082
amean          45.395    45.496    45.326
amin           45.023    45.098    44.953
amax           45.805    45.961    45.738
emean           0.130     0.138     0.126
emin            0.118     0.125     0.113
emax            0.144     0.154     0.139
imean           9.953     9.956     9.961
imin            9.460     9.451     9.484
imax           10.501    10.537    10.485
excite_mean     0.217     0.221     0.214
fracstop        1.000     1.000     1.000
cjmean          3.061     3.060     3.062

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       177.2     179.5     176.9
kozaiamp        180.0     180.0     180.0