Orbit Fit and Astrometric record for 08JO41

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: 08JO41    
# Created Tue Oct 17 01:37:45 2017
# Orbit generated from Bernstein formalism
# Fitting   37 observations of   37
# Arc:   8.05y
# First observation: 2008/05/11
#  Last observation: 2016/05/29
Preliminary a, adot, b, bdot, g, gdot:
  -0.001400   0.026174   0.000247  -0.006286   0.022545   0.000000
# Chi-squared of fit:    50.91 DOF:   68 RMS:  0.21
# Min/Max residuals:    -0.45    0.52
# Exact a, adot, b, bdot, g, gdot:
  1.639024E-05  2.464608E-02 -4.647977E-06 -5.950014E-03  2.279478E-02 -6.795645E-03
# Covariance matrix:
  1.9817E-13 -7.1254E-14  1.5484E-14  7.4768E-15  9.4641E-14 -2.5228E-13
 -7.1254E-14  6.7352E-14  6.9639E-15 -1.4022E-14 -9.5579E-15  3.1915E-13
  1.5484E-14  6.9639E-15  7.6560E-14 -1.7020E-14  2.4121E-14  5.0325E-14
  7.4768E-15 -1.4022E-14 -1.7020E-14  9.7982E-15 -4.3315E-15 -7.6744E-14
  9.4641E-14 -9.5579E-15  2.4121E-14 -4.3315E-15  9.9520E-14  4.6366E-15
 -2.5228E-13  3.1915E-13  5.0325E-14 -7.6744E-14  4.6366E-15  1.6946E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   48.297068  -98.422040    0.514714    0.646017   -0.575623  2454597.986664
# Heliocentric elements and errors
Epoch:              2454590.5000  =  2008/05/04
Mean Anomaly:          348.38952 +/-     0.003
Argument of Peri:      146.13475 +/-     0.008
Long of Asc Node:      153.11954 +/-     0.000
Inclination:            48.80185 +/-     0.000
Eccentricity:         0.54966519 +/-    0.0001
Semi-Major Axis:     88.71378175 +/-    0.0130
Time of Perihelion: 2464433.6221 +/-       1.3
Perihelion:          39.95090403 +/-    0.0080
Aphelion:           137.47665947 +/-    0.0208
Period (y)              835.5931 +/-      0.18
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           -4.90907001 +/-    0.0001
Ecliptic Y          -29.65614913 +/-    0.0004
Ecliptic Z           32.75320360 +/-    0.0005
Ecliptic XDOT         0.00293606 +/-    0.0000
Ecliptic YDOT        -0.00042352 +/-    0.0000
Ecliptic ZDOT        -0.00108494 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   44.45625372 +/-    0.0004
Geocenter to KBO     43.86969461 +/-    0.0006
# Hcoef:  8.44

The following table shows the complete astrometric record for 08JO41. 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 (08JO41) followed by the observatory code and reference code for the source of the astrometry.

2008 05  11.48591  17 35 18.30   +25 02 17.2   24.5r 08JO41    568  C~1Q3h      
2008 05  11.52755  17 35 18.12   +25 02 18.5   24.4r 08JO41    568  C~1Q3h      
2008 05  11.56936  17 35 17.96   +25 02 19.8   24.8r 08JO41    568  C~1Q3h      
2008 08  04.25147  17 29 13.74   +24 49 14.0   25.0r 08JO41    568  C~1Q3h      
2008 08  04.25850  17 29 13.70   +24 49 13.6   25.1r 08JO41    568  C~1Q3h      
2008 08  04.28746  17 29 13.63   +24 49 12.5   25.4r 08JO41    568  C~1Q3h      
2008 08  04.29450  17 29 13.61   +24 49 12.4   24.9r 08JO41    568  C~1Q3h      
2008 08  04.32261  17 29 13.53   +24 49 10.7   25.3r 08JO41    568  C~1Q3h      
2008 08  04.32964  17 29 13.50   +24 49 10.3   24.9r 08JO41    568  C~1Q3i      
2008 08  31.26042  17 28 29.62   +24 24 34.2         08JO41    568  C~1Q3i      
2008 09  24.21522  17 28 48.01   +23 59 46.6         08JO41    568  C~1Q3i      
2008 09  24.23258  17 28 48.01   +23 59 45.3         08JO41    568  C~1Q3i      
2008 09  24.25001  17 28 48.06   +23 59 44.0         08JO41    568  C~1Q3i      
2009 04  23.55931  17 42 25.64   +24 24 10.5         08JO41    568  C~1Q3i      
2009 04  23.61034  17 42 25.51   +24 24 12.8         08JO41    568  C~1Q3i      
2009 06  21.33075  17 38 22.65   +24 44 35.0         08JO41    695  C~1Q3i      
2009 06  21.36872  17 38 22.48   +24 44 34.9         08JO41    695  C~1Q3i      
2009 06  21.40805  17 38 22.32   +24 44 34.4         08JO41    695  C~1Q3i      
2009 06  22.34137  17 38 17.76   +24 44 27.1         08JO41    695  C~1Q3i      
2009 06  22.41964  17 38 17.36   +24 44 26.8         08JO41    695  C~1Q3i      
2009 07  25.24053  17 35 54.00   +24 31 05.9         08JO41    675  C~1Q3i      
2009 07  25.27260  17 35 53.84   +24 31 04.3         08JO41    675  C~1Q3i      
2009 07  25.31756  17 35 53.69   +24 31 02.3         08JO41    675  C~1Q3i      
2009 09  13.23458  17 34 33.88   +23 46 01.0         08JO41    568  C~1Q3i      
2009 09  15.23625  17 34 35.49   +23 43 55.3         08JO41    568  C~1Q3i      
2009 09  16.23424  17 34 36.45   +23 42 52.2         08JO41    568  C~1Q3i      
2011 05  02.25674  17 54 25.35   +23 33 09.2         08JO41    304  C~1Q3i      
2011 05  02.36577  17 54 25.01   +23 33 13.6         08JO41    304  C~1Q3i      
2013 04  09.59581  18 07 33.45   +22 14 02.7   24.6R 08JO41    568  C~1Q3i      
2013 05  03.53574  18 06 49.63   +22 32 22.2         08JO41    568  C~1Q3i      
2013 05  12.58746  18 06 20.70   +22 37 49.6   24.2R 08JO41    568  C~1Q3i      
2013 06  17.52961  18 03 42.90   +22 47 53.8   23.9R 08JO41    568  C~1Q3i      
2013 07  11.44643  18 01 47.04   +22 42 50.2   24.1R 08JO41    568  C~1Q3i      
2013 07  15.49576  18 01 28.68   +22 41 03.2   24.6R 08JO41    568  C~1Q3i      
2016 05  29.24196  18 24 16.430  +21 02 29.64  24.8R 08JO41    G37              
2016 05  29.31131  18 24 16.122  +21 02 31.03        08JO41    G37              
2016 05  29.39571  18 24 15.751  +21 02 32.63        08JO41    G37              

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     0.15       0.00     0.11
  2   0.0001     -2.52    -0.06       1.14     0.10
  3   0.0002     -4.78     0.01       2.30     0.10
  4   0.2321  -4905.30     0.01   -1073.22    -0.21
  5   0.2321  -4905.82    -0.26   -1073.65    -0.29
  6   0.2322  -4906.71    -0.10   -1074.80    -0.01
  7   0.2322  -4906.98    -0.11   -1074.92     0.22
  8   0.2323  -4907.98    -0.08   -1076.67    -0.14
  9   0.2323  -4908.37    -0.22   -1077.09    -0.21
 10   0.3060  -5428.93     0.19   -2583.24     0.22
 11   0.3716  -5100.03     0.29   -4056.47     0.06
 12   0.3717  -5099.96    -0.14   -4057.77    -0.18
 13   0.3717  -5099.21     0.11   -4059.03    -0.38
 14   0.9502   5971.74     0.07   -1869.17    -0.16
 15   0.9504   5969.79     0.10   -1867.02    -0.13
 16   1.1111   2574.18    -0.33    -891.48     0.18
 17   1.1112   2571.88    -0.10    -891.74     0.38
 18   1.1114   2569.74     0.37    -892.39     0.21
 19   1.1139   2508.27    -0.07    -904.02     0.16
 20   1.1141   2502.85    -0.30    -904.69     0.52
 21   1.2040    606.54     0.35   -1835.89     0.24
 22   1.2041    604.47    -0.20   -1837.63    -0.14
 23   1.2042    602.56     0.02   -1839.76    -0.35
 24   1.3409   -314.40     0.09   -4606.30     0.29
 25   1.3463   -284.41     0.16   -4730.42     0.34
 26   1.3491   -267.27     0.34   -4792.60     0.02
 27   2.9727  16099.38    -0.01   -4058.72    -0.45
 28   2.9730  16094.26    -0.15   -4054.78    -0.43
 29   4.9120  27584.13     0.03   -7622.70    -0.24
 30   4.9775  26833.16    -0.12   -6592.43    -0.16
 31   5.0023  26388.25     0.00   -6311.70    -0.15
 32   5.1007  24114.07    -0.06   -5959.34    -0.07
 33   5.1662  22536.05    -0.14   -6442.43    -0.12
 34   5.1773  22292.65     0.00   -6577.40     0.22
 35   8.0486  42461.53     0.17  -10090.92     0.16
 36   8.0488  42456.86     0.03  -10090.15     0.16
 37   8.0490  42451.25    -0.05  -10089.28     0.10

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.

08JO41    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        86.602    86.638    86.567
ecceobj         0.540     0.541     0.540
incobj         48.820    48.820    48.820
qmin           39.292    39.334    39.287
qmax          138.401   138.376   138.097
amean          87.523    87.563    87.480
amin           86.406    86.415    86.355
amax           89.233    89.228    89.050
emean           0.538     0.538     0.538
emin            0.529     0.529     0.529
emax            0.551     0.551     0.551
imean          47.948    47.954    47.943
imin           47.380    47.385    47.378
imax           48.436    48.447    48.410
excite_mean     0.917     0.917     0.917
fracstop        1.000     1.000     1.000
cjmean          2.270     2.270     2.270

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       177.7     178.7     176.9
kozaiamp         31.8      32.7      31.0