Orbit Fit and Astrometric record for 12FH84

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: 12FH84    
# Created Thu Dec 14 02:37:50 2017
# Orbit generated from Bernstein formalism
# Fitting    9 observations of    9
# Arc:   0.96y
# First observation: 2012/03/25
#  Last observation: 2013/03/12
Preliminary a, adot, b, bdot, g, gdot:
  -0.000035   0.010035   0.000004  -0.000602   0.014677   0.000000
# Chi-squared of fit:    33.58 DOF:   12 RMS:  0.34
# Min/Max residuals:    -0.72    1.00
# Exact a, adot, b, bdot, g, gdot:
  1.096612E-05  9.962704E-03  1.867831E-06 -6.022406E-04  1.490530E-02  1.334517E-03
# Covariance matrix:
  7.3763E-13  1.7539E-12  2.1044E-14 -1.4893E-13  2.3352E-12  2.3649E-10
  1.7539E-12  3.2095E-11  2.0936E-13 -1.8596E-12  2.2267E-11  2.9900E-09
  2.1044E-14  2.0936E-13  3.2865E-13 -4.1156E-13  1.6976E-13  2.0862E-11
 -1.4893E-13 -1.8596E-12 -4.1156E-13  1.0930E-12 -1.3925E-12 -1.8100E-10
  2.3352E-12  2.2267E-11  1.6976E-13 -1.3925E-12  1.8350E-11  2.2299E-09
  2.3649E-10  2.9900E-09  2.0862E-11 -1.8100E-10  2.2299E-09  2.9069E-07
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.137206 -176.650762   -0.025617    0.019875   -0.999853  2456011.659316
# Heliocentric elements and errors
Epoch:              2456010.5000  =  2012/03/24
Mean Anomaly:          140.86272 +/-     8.930
Argument of Peri:        6.66700 +/-     8.583
Long of Asc Node:       21.26975 +/-     0.028
Inclination:             3.64170 +/-     0.005
Eccentricity:         0.25320005 +/-    0.0172
Semi-Major Axis:     56.00262363 +/-    0.5189
Time of Perihelion: 2396113.5720 +/-    3704.6
Perihelion:          41.82275679 +/-    1.0367
Aphelion:            70.18249046 +/-    1.1608
Period (y)              419.1030 +/-      5.82
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -67.95639563 +/-    0.0192
Ecliptic Y           -4.00181213 +/-    0.0011
Ecliptic Z            1.33162512 +/-    0.0004
Ecliptic XDOT        -0.00014480 +/-    0.0001
Ecliptic YDOT        -0.00183743 +/-    0.0000
Ecliptic ZDOT        -0.00010563 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   68.08714587 +/-    0.0192
Geocenter to KBO     67.09023358 +/-    0.0193
# Hcoef:  7.34

The following table shows the complete astrometric record for 12FH84. 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 (12FH84) followed by the observatory code and reference code for the source of the astrometry.

2012 03  25.15855  12 14 06.025  -00 17 16.56  25.5R 12FH84    304  C~1u4h      
2012 03  25.24236  12 14 05.784  -00 17 15.27  25.5R 12FH84    304  C~1u4h      
2012 04  18.07430  12 12 58.949  -00 10 15.09  25.5R 12FH84    304  C~1u4h      
2012 04  18.22606  12 12 58.576  -00 10 11.92  25.5R 12FH84    304  C~1u4h      
2012 07  21.26309  12 11 57.858  -00 05 40.30  24.9R 12FH84    568  C~1u4h      
2012 07  21.28020  12 11 57.894  -00 05 40.54  25.1R 12FH84    568  C~1u4h      
2013 03  11.19334  12 16 49.019  -00 37 05.71  25.3R 12FH84    304  C~1u4h      
2013 03  11.32902  12 16 48.659  -00 37 03.02        12FH84    304  C~1u4h      
2013 03  12.26894  12 16 46.024  -00 36 46.02        12FH84    304  C~1u4h      

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    -0.08       0.00    -0.52
  2   0.0002     -3.83     0.12      -0.25    -0.72
  3   0.0655  -1090.78    -0.08     -12.74     0.16
  4   0.0659  -1097.17     0.04     -12.05     1.00
  5   0.3234  -2040.97    -0.06    -124.46     0.11
  6   0.3234  -2040.38     0.06    -124.46     0.13
  7   0.9611   2716.17    -0.26    -120.64    -0.30
  8   0.9615   2710.14     0.03    -120.32     0.07
  9   0.9640   2667.11     0.23    -120.40     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.

12FH84    quality flag:2

Type:       SCATNEAR  SCATNEAR    5:2EEE
Type:                             5:2EII

axisobj        55.897    58.423    55.224
ecceobj         0.255     0.325     0.234
incobj          3.647     3.645     3.648
qmin           41.372    39.130    42.194
qmax           71.807    79.262    69.525
amean          56.144    58.692    55.463
amin           55.548    58.044    54.853
amax           56.886    59.510    56.176
emean           0.251     0.321     0.225
emin            0.240     0.312     0.210
emax            0.263     0.332     0.238
imean           3.718     3.747     4.255
imin            3.508     3.493     3.856
imax            3.892     3.962     4.758
excite_mean     0.259     0.328     0.237
fracstop        1.000     1.000     1.000
cjmean          3.174     3.152     3.180

libcent 0      -180.0    -180.0     179.7
libamp  0      -180.0    -180.0      84.3
libcent 1      -180.0    -180.0     191.7
libamp  1      -180.0    -180.0     121.5
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       165.6     169.9     177.3
kozaiamp        180.0     179.9     180.0