Orbit Fit and Astrometric record for 05ER318

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: 05ER318   
# Created Tue Oct 24 01:37:35 2017
# Orbit generated from Bernstein formalism
# Fitting   19 observations of   20
# Arc:   4.04y
# First observation: 2005/03/12
#  Last observation: 2009/03/25
Preliminary a, adot, b, bdot, g, gdot:
  -0.000400   0.038893   0.000069  -0.007101   0.032401   0.000000
# Chi-squared of fit:    15.33 DOF:   32 RMS:  0.16
# Min/Max residuals:    -0.52    0.29
# Exact a, adot, b, bdot, g, gdot:
  1.805364E-05  3.839708E-02 -2.528955E-06 -7.027454E-03  3.275945E-02 -3.736828E-03
# Covariance matrix:
  2.7521E-13 -2.0174E-13 -9.1543E-15  2.0510E-14  2.3788E-15 -7.2913E-13
 -2.0174E-13  3.4985E-13  2.4252E-14 -5.3492E-14  9.9548E-14  1.8946E-12
 -9.1543E-15  2.4252E-14  2.1484E-13 -7.4664E-14  1.3898E-14  1.5575E-13
  2.0510E-14 -5.3492E-14 -7.4664E-14  4.5997E-14 -2.8717E-14 -3.4067E-13
  2.3788E-15  9.9548E-14  1.3898E-14 -2.8717E-14  3.0052E-13  1.0005E-12
 -7.2913E-13  1.8946E-12  1.5575E-13 -3.4067E-13  1.0005E-12  1.2041E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.015318  147.420302   -0.405624    0.016091   -0.902438  2453441.723763
# Heliocentric elements and errors
Epoch:              2453440.5000  =  2005/03/11
Mean Anomaly:          335.09883 +/-     0.021
Argument of Peri:      209.29773 +/-     0.030
Long of Asc Node:      333.54506 +/-     0.000
Inclination:            10.40026 +/-     0.000
Eccentricity:         0.16707564 +/-    0.0001
Semi-Major Axis:     36.77503727 +/-    0.0031
Time of Perihelion: 2459074.8708 +/-       4.6
Perihelion:          30.63082444 +/-    0.0038
Aphelion:            42.91925010 +/-    0.0046
Period (y)              223.0170 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -26.70169098 +/-    0.0004
Ecliptic Y           16.57812865 +/-    0.0003
Ecliptic Z            0.54083695 +/-    0.0000
Ecliptic XDOT        -0.00147351 +/-    0.0000
Ecliptic YDOT        -0.00287373 +/-    0.0000
Ecliptic ZDOT        -0.00059269 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   31.43417178 +/-    0.0004
Geocenter to KBO     30.52554722 +/-    0.0005
# Hcoef:  7.72

The following table shows the complete astrometric record for 05ER318. 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 (05ER318) followed by the observatory code and reference code for the source of the astrometry.

2005 03  12.22302  09 59 54.02   +13 19 17.6   22.2R 05ER318   695  Cn3361      
2005 03  12.30395  09 59 53.55   +13 19 19.8         05ER318   695  Cn3361      
2005 04  10.17132  09 57 42.12   +13 28 22.2   22.7R 05ER318   695  Cn3361      
2005 04  11.17767  09 57 38.92   +13 28 33.5         05ER318   695  Cn3361      
2005 04  11.27858  09 57 38.59   +13 28 34.6         05ER318   695  Cn3361      
2006 04  26.03038  10 04 52.76   +12 22 44.5   21.7R 05ER318   807  Cr3594      
2006 04  26.11591  10 04 52.59   +12 22 44.9         05ER318   807  Cr3594      
2006 04  27.04467  10 04 51.07   +12 22 48.4         05ER318   807  Cr3594      
2006 12  21.39586  10 22 32.45   +10 27 01.5   22.4R 05ER318   695  Ct5520      
2006 12  21.53803  10 22 32.16   +10 27 02.7         05ER318   695  Ct5520      
2007 02  21.37829  10 17 40.95   +10 50 34.0   21.9R 05ER318   695  Cu3067      
2007 02  21.48140  10 17 40.28   +10 50 36.7         05ER318   695  Cu3067      
2008 04  04.17161  10 21 36.02   +09 58 44.9   22.6R 05ER318   688  Cy5742      
2008 04  04.26876  10 21 35.63   +09 58 46.8         05ER318   688  Cy5742      
2008 12  15.98499  10 38 02.90   +08 04 28.6   23.2R 05ER318   250  S~06Ap      
2008 12  15.99124  10 38 02.90   +08 04 28.6         05ER318   250  S~06Ap      
2008 12  15.99819  10 38 02.89   +08 04 28.6         05ER318   250  S~06Ap      
2008 12  16.00513  10 38 02.88   +08 04 28.6         05ER318   250  S~06Ap      
2009 03  25.20176  10 30 15.13   +08 42 40.0   22.4R 05ER318   688  C~05XD      
2009 03  25.28845  10 30 14.69   +08 42 43.2         05ER318   688  C~05XD      

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     0.10       0.00    -0.18
  2   0.0002     -7.20    -0.05      -0.30    -0.04
  3   0.0793  -1994.69    -0.20    -149.47    -0.06
  4   0.0820  -2042.43     0.03    -154.84     0.10
  5   0.0823  -2047.33    -0.02    -155.45     0.10
  6   1.1220   5275.58     0.09   -1668.10     0.14
  7   1.1222   5273.10    -0.12   -1668.60     0.12
  8   1.1248   5251.00     0.29   -1673.09     0.19
  9   1.7773  22394.50    -0.08   -2609.95    -0.03
 10   1.7777  22390.03    -0.10   -2610.39     0.10
 11   1.9470  17833.93     0.14   -2845.14     0.03
 12   1.9473  17823.67     0.02   -2846.17    -0.52
 13   3.0635  22233.87    -0.40   -4504.62    -0.14
 14   3.0638  22227.74     0.22   -4504.93    -0.04
 15   3.7639  38716.46     0.02   -5539.78     0.11
 16   3.7639  38716.46     0.10   -5539.78     0.15
 17   3.7639  38716.32     0.04   -5539.84     0.12
 18   3.7639  38716.17    -0.02   -5539.89     0.10
 19   4.0355  31208.17    -0.05   -5974.95    -0.23
 20   4.0358  31200.76 (  -0.04)  -5974.35 (   0.71)

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.

05ER318    quality flag:3

Type:           4:3E      4:3E      4:3E

axisobj        36.494    36.502    36.485
ecceobj         0.160     0.160     0.159
incobj         10.432    10.432    10.433
qmin           29.480    29.597    29.375
qmax           43.765    43.800    43.984
amean          36.476    36.477    36.476
amin           36.108    36.091    36.127
amax           36.898    36.903    36.861
emean           0.160     0.160     0.162
emin            0.128     0.128     0.128
emax            0.189     0.188     0.193
imean          11.150    11.114    11.280
imin            9.531     9.505     9.772
imax           12.784    12.779    12.814
excite_mean     0.252     0.251     0.254
fracstop        1.000     1.000     1.000
cjmean          2.956     2.957     2.954

libcent 0       179.1     180.6     182.6
libamp  0        76.6      81.6      68.5
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       167.9     170.1     168.4
kozaiamp        180.0     180.0     180.0