Orbit Fit and Astrometric record for 13RP98

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: 13RP98    
# Created Mon Dec 18 02:37:56 2017
# Orbit generated from Bernstein formalism
# Fitting   12 observations of   12
# Arc:   3.06y
# First observation: 2013/09/03
#  Last observation: 2016/09/26
Preliminary a, adot, b, bdot, g, gdot:
   0.000048   0.026172   0.000008  -0.002198   0.025705   0.000000
# Chi-squared of fit:     2.43 DOF:   18 RMS:  0.08
# Min/Max residuals:    -0.23    0.15
# Exact a, adot, b, bdot, g, gdot:
  1.714219E-05  2.592525E-02 -1.543902E-06 -2.177899E-03  2.555739E-02 -3.203838E-03
# Covariance matrix:
  4.2983E-13  1.8505E-12  4.3428E-14 -1.8415E-13  1.5509E-12  2.5393E-11
  1.8505E-12  4.6160E-11  5.6669E-13 -4.3070E-12  1.7630E-11  6.0462E-10
  4.3428E-14  5.6669E-13  1.7779E-13 -1.1159E-13  3.0673E-13  7.4732E-12
 -1.8415E-13 -4.3070E-12 -1.1159E-13  4.7512E-13 -1.6737E-12 -5.6514E-11
  1.5509E-12  1.7630E-11  3.0673E-13 -1.6737E-12  1.0443E-11  2.3289E-10
  2.5393E-11  6.0462E-10  7.4732E-12 -5.6514E-11  2.3289E-10  7.9326E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
   12.673789  -32.157553   -0.222051    0.216213   -0.961098  2456538.703926
# Heliocentric elements and errors
Epoch:              2456530.5000  =  2013/08/26
Mean Anomaly:          305.78107 +/-     0.334
Argument of Peri:      179.18742 +/-     0.660
Long of Asc Node:      216.38916 +/-     0.004
Inclination:            13.28322 +/-     0.000
Eccentricity:         0.13470970 +/-    0.0033
Semi-Major Axis:     42.89549083 +/-    0.0379
Time of Perihelion: 2471985.3346 +/-      93.0
Perihelion:          37.11705226 +/-    0.1443
Aphelion:            48.67392940 +/-    0.1470
Period (y)              280.9478 +/-      0.37
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           33.27016948 +/-    0.0041
Ecliptic Y          -20.65153471 +/-    0.0026
Ecliptic Z            8.58453465 +/-    0.0011
Ecliptic XDOT         0.00123186 +/-    0.0000
Ecliptic YDOT         0.00250107 +/-    0.0000
Ecliptic ZDOT        -0.00030279 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.08845592 +/-    0.0036
Geocenter to KBO     39.12762318 +/-    0.0049
# Hcoef:  7.43

The following table shows the complete astrometric record for 13RP98. 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 (13RP98) followed by the observatory code and reference code for the source of the astrometry.

2013 09  03.203148 21 42 44.92   -00 18 05.5   23.5g 13RP98    W84  C~2BnN      
2013 09  10.194653 21 42 14.74   -00 21 39.5   23.2r 13RP98    W84  C~2BnN      
2013 09  10.196030 21 42 14.73   -00 21 39.5   22.8i 13RP98    W84  C~2BnN      
2013 09  11.201921 21 42 10.54   -00 22 10.7   22.8r 13RP98    W84  C~2BnN      
2013 09  11.203299 21 42 10.54   -00 22 10.9   22.6i 13RP98    W84  C~2BnN      
2013 09  13.137616 21 42 02.60   -00 23 11.4   22.8i 13RP98    W84  C~2BnN      
2013 09  24.042488 21 41 21.37   -00 28 56.2   23.4g 13RP98    W84  C~2BnN      
2013 10  10.080683 21 40 34.40   -00 37 11.8   23.1r 13RP98    W84  C~2BnN      
2013 10  11.070324 21 40 32.14   -00 37 41.1   22.4z 13RP98    W84  C~2BnN      
2016 08  31.250324 22 00 22.24   +00 52 39.7   23.1i 13RP98    W84  C~2BnN      
2016 09  03.220475 22 00 08.63   +00 51 09.6   23.2r 13RP98    W84  C~2BnN      
2016 09  26.082616 21 58 33.74   +00 38 52.7   22.8g 13RP98    W84  C~2BnN      

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    -0.23       0.00     0.04
  2   0.0191   -498.32     0.06     -49.06    -0.03
  3   0.0191   -498.46     0.02     -49.01     0.03
  4   0.0219   -568.14     0.09     -57.22     0.15
  5   0.0219   -568.21     0.12     -57.41    -0.03
  6   0.0272   -700.73     0.01     -74.27     0.05
  7   0.0571  -1399.17    -0.11    -190.69     0.01
  8   0.1010  -2229.49    -0.00    -420.16    -0.08
  9   0.1037  -2271.28     0.03    -436.33    -0.13
 10   2.9926  16397.33    -0.03   -1345.34    -0.00
 11   3.0007  16173.40     0.06   -1361.52    -0.03
 12   3.0633  14576.39    -0.02   -1576.73     0.04

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.

13RP98    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        43.077    43.168    42.993
ecceobj         0.137     0.145     0.130
incobj         13.285    13.286    13.284
qmin           35.812    35.789    36.265
qmax           50.521    50.805    49.981
amean          43.046    43.129    42.954
amin           42.690    42.758    42.607
amax           43.441    43.527    43.341
emean           0.145     0.143     0.136
emin            0.128     0.122     0.120
emax            0.165     0.168     0.153
imean          14.381    14.393    14.380
imin           13.556    13.390    13.625
imax           15.230    15.309    15.159
excite_mean     0.288     0.287     0.283
fracstop        1.000     1.000     1.000
cjmean          2.991     2.993     2.994

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       181.1     181.5     183.5
kozaiamp        179.9     180.0     180.0