Orbit Fit and Astrometric record for 07HV90

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: 07HV90    
# Created Wed Oct 17 01:08:48 2018
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting    9 observations of    9
# Arc:   9.11y
# First observation: 2007/04/21
#  Last observation: 2016/05/29
# Chi-squared of fit:     5.49 DOF:   12 RMS:  0.14
# Min/Max residuals:    -0.30    0.26
# Exact a, adot, b, bdot, g, gdot:
  1.531561E-05  2.477017E-02 -6.792214E-07 -1.100430E-03  2.466211E-02  6.038679E-04
# Covariance matrix:
  5.4420E-13 -1.5607E-13 -2.1702E-15  1.8298E-14  5.0702E-12 -2.0689E-12
 -1.5607E-13  1.1147E-12  4.4994E-15 -6.1449E-14 -3.5084E-12  6.6107E-12
 -2.1702E-15  4.4994E-15  4.8648E-13 -5.8251E-14 -1.8596E-13  8.0304E-14
  1.8298E-14 -6.1449E-14 -5.8251E-14  1.6890E-14  1.4390E-12 -7.5450E-13
  5.0702E-12 -3.5084E-12 -1.8596E-13  1.4390E-12  4.7284E-10 -1.6455E-10
 -2.0689E-12  6.6107E-12  8.0304E-14 -7.5450E-13 -1.6455E-10  8.4199E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.547221 -121.330510    0.472813    0.023925   -0.882070  2454211.734814
# Heliocentric elements and errors
Epoch:              2454212.5000  =  2007/04/22
Mean Anomaly:           10.11363 +/-     0.217
Argument of Peri:      137.39441 +/-     0.241
Long of Asc Node:       88.98909 +/-     0.002
Inclination:             2.94004 +/-     0.000
Eccentricity:         0.06789132 +/-    0.0028
Semi-Major Axis:     44.39795879 +/-    0.1728
Time of Perihelion: 2451176.8794 +/-      67.5
Perihelion:          41.38372282 +/-    0.2045
Aphelion:            47.41219475 +/-    0.2235
Period (y)              295.8371 +/-      1.73
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -21.94014030 +/-    0.0186
Ecliptic Y          -35.13546739 +/-    0.0305
Ecliptic Z            1.09479942 +/-    0.0010
Ecliptic XDOT         0.00231816 +/-    0.0000
Ecliptic YDOT        -0.00149298 +/-    0.0000
Ecliptic ZDOT        -0.00012039 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.43752800 +/-    0.0277
Geocenter to KBO     40.54805118 +/-    0.0358
# Hcoef:  6.16

The following table shows the complete astrometric record for 07HV90. 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 (07HV90) followed by the observatory code and reference code for the source of the astrometry.

2007 04  21.23406  15 47 10.71   -18 21 12.3   21.0R 07HV90    807  Cv1554      
2007 04  22.27870  15 47 06.20   -18 20 57.5         07HV90    807  Cv1554      
2007 04  22.34636  15 47 05.94   -18 20 56.5         07HV90    807  Cv1554      
2015 05  20.35342  16 31 47.54   -20 51 39.4         07HV90    W84  C~1Tj1      
2015 05  21.39469  16 31 42.32   -20 51 28.8   23.1V 07HV90    W84  C~1Tj1      
2015 05  22.40746  16 31 37.23   -20 51 18.6         07HV90    W84  C~1Tj1      
2015 05  24.34612  16 31 27.44   -20 50 58.4         07HV90    W84  C~1Tj1      
2016 05  29.34594  16 36 54.967  -21 06 26.49  22.2R 07HV90    G37  C~2bkz      
2016 05  29.39185  16 36 54.739  -21 06 26.31        07HV90    G37  C~2bkz      

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     0.17       0.00    -0.04
  2   0.0029      0.00    -0.30       0.00     0.00
  3   0.0030      0.00     0.26       0.00     0.03
  4   8.0797      0.00     0.04       0.00    -0.00
  5   8.0826      0.00     0.02       0.00    -0.06
  6   8.0853      0.00     0.07       0.00    -0.24
  7   8.0907      0.00     0.07       0.00     0.08
  8   9.1064      0.00    -0.00       0.00     0.21
  9   9.1065      0.00     0.15       0.00    -0.06

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.

07HV90    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.809    43.809    43.809
ecceobj         0.056     0.056     0.056
incobj          2.947     2.947     2.947
qmin           40.901    40.900    40.901
qmax           47.588    47.586    47.590
amean          44.135    44.135    44.135
amin           43.789    43.789    43.790
amax           44.501    44.501    44.501
emean           0.055     0.055     0.055
emin            0.038     0.038     0.038
emax            0.070     0.070     0.070
imean           1.193     1.193     1.193
imin            0.491     0.491     0.491
imax            1.763     1.763     1.763
excite_mean     0.059     0.059     0.059
fracstop        1.000     1.000     1.000
cjmean          3.099     3.099     3.099

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       203.5     203.5     203.5
kozaiamp        179.9     180.0     179.9