Orbit Fit and Astrometric record for 95SN55

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: 95SN55    
# Created Wed Oct 22 01:36:58 2014
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   12 observations of   14
# Arc:  35.81d
# First observation: 1995/09/20
#  Last observation: 1995/10/26
# Chi-squared of fit:   283.82 DOF:   18 RMS:  0.86
# Min/Max residuals:    -1.72    1.32
# Exact a, adot, b, bdot, g, gdot:
  5.729026E-06  1.653480E-02 -6.107739E-06 -8.363426E-04  2.643601E-02  2.432033E-02
# Covariance matrix:
  9.1669E-13  9.6750E-10  2.2604E-13 -2.4259E-12  1.5985E-10  1.4074E-09
  9.6750E-10  1.8778E-06  4.3006E-10 -4.4448E-09  3.0389E-07  4.8113E-07
  2.2604E-13  4.3006E-10  3.3176E-13 -4.0713E-12  6.9656E-11  1.3412E-10
 -2.4259E-12 -4.4448E-09 -4.0713E-12  8.3324E-11 -7.2128E-10 -1.9583E-09
  1.5985E-10  3.0389E-07  6.9656E-11 -7.2128E-10  4.9221E-08  9.5582E-08
  1.4074E-09  4.8113E-07  1.3412E-10 -1.9583E-09  9.5582E-08  7.5065E-06
#      lat0       lon0       xBary       yBary       zBary        JD0
   -3.867254   14.329078    0.290844   -0.064684   -0.955817  2449980.895908
# Heliocentric elements and errors
Epoch:              2449980.5000  =  1995/09/20
Mean Anomaly:           28.59599 +/-   135.466
Argument of Peri:       94.61512 +/-     8.856
Long of Asc Node:      142.64083 +/-     4.099
Inclination:             4.83228 +/-     0.871
Eccentricity:         0.83271864 +/-    0.0199
Semi-Major Axis:     49.80224680 +/-   80.7122
Time of Perihelion: 2439783.4508 +/-   54294.8
Perihelion:           8.33098778 +/-   13.5378
Aphelion:            91.27350583 +/-  147.9260
Period (y)              351.4646 +/-    854.40
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           37.56989719 +/-    0.3412
Ecliptic Y            9.28853474 +/-    0.0871
Ecliptic Z           -2.55147012 +/-    0.0238
Ecliptic XDOT         0.00201280 +/-    0.0003
Ecliptic YDOT         0.00228039 +/-    0.0002
Ecliptic ZDOT        -0.00025649 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.78455373 +/-    0.3312
Geocenter to KBO     37.82666842 +/-    0.3530
# Hcoef:  6.03

The following table shows the complete astrometric record for 95SN55. 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 (95SN55) followed by the observatory code and reference code for the source of the astrometry.

1995 09  20.39520  00 58 45.00   +02 04 57.8   22.3V 95SN55    691  Ca4783      
1995 09  20.41624  00 58 44.93   +02 04 57.0   21.9V 95SN55    691  Ca4783      
1995 09  20.43764  00 58 44.79   +02 04 55.7   22.3V 95SN55    691  Ca4783      
1995 09  26.35707  00 58 15.38   +02 01 37.2   22.3V 95SN55    691  Ca4783      
1995 09  26.37790  00 58 15.24   +02 01 36.6   22.0V 95SN55    691  Ca4783      
1995 09  26.39889  00 58 15.15   +02 01 35.0   22.3V 95SN55    691  Ca4783      
1995 10  01.38449  00 57 49.62   +01 58 49.3   22.4V 95SN55    691  Ca4783      
1995 10  01.40522  00 57 49.53   +01 58 49.5   21.9V 95SN55    691  Ca4783      
1995 10  01.42596  00 57 49.42   +01 58 49.0   21.8V 95SN55    691  Ca4783      
1995 10  20.31832  00 56 12.38   +01 48 36.9   21.8V 95SN55    691  Ca4783      
1995 10  20.34353  00 56 12.28   +01 48 36.7   21.3V 95SN55    691  Ca4783      
1995 10  26.20227  00 55 42.87   +01 45 40.7   21.5V 95SN55    691  Ca4783      
1995 10  26.22333  00 55 42.73   +01 45 41.4   22.2V 95SN55    691  Ca4783      
1995 10  26.24450  00 55 42.58   +01 45 40.6   21.3V 95SN55    691  Ca4783      

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    -0.21       0.00    -1.21
  2   0.0001      0.00     0.91       0.00     1.32
  3   0.0001      0.00     0.41       0.00     0.72
  4   0.0163      0.00     0.68       0.00    -0.92
  5   0.0164      0.00     0.18       0.00    -0.83
  6   0.0164      0.00     0.44       0.00    -1.72
  7   0.0301      0.00    -1.34       0.00    -0.86
  8   0.0301      0.00    -1.07       0.00     0.04
  9   0.0302      0.00    -1.10       0.00     0.23
 10   0.0819      0.00 (   3.29)      0.00 (  -0.34)
 11   0.0820      0.00 (   3.73)      0.00 (   0.24)
 12   0.0980      0.00     0.93       0.00    -0.53
 13   0.0981      0.00     0.41       0.00     0.78
 14   0.0982      0.00    -0.26       0.00     0.60

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.

95SN55    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        49.643    49.644    49.642
ecceobj         0.830     0.830     0.830
incobj          4.831     4.831     4.831
qmin            8.094     8.256     8.176
qmax          107.337    93.372    91.569
amean          51.932    49.841    47.382
amin           48.524    48.590    44.906
amax           57.775    50.880    49.937
emean           0.840     0.832     0.825
emin            0.830     0.829     0.817
emax            0.858     0.836     0.834
imean           3.513     3.648     3.648
imin            3.332     3.636     3.620
imax            3.672     3.663     3.661
excite_mean     0.843     0.835     0.827
fracstop        0.001     0.000     0.001
cjmean          2.001     2.028     2.052

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        98.8      95.3      96.9
kozaiamp          3.9       0.6       2.5