Orbit Fit and Astrometric record for 13GP137

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: 13GP137   
# Created Sat Oct 21 01:38:13 2017
# Orbit generated from Bernstein formalism
# Fitting   26 observations of   26
# Arc:   3.30y
# First observation: 2013/02/08
#  Last observation: 2016/05/29
Preliminary a, adot, b, bdot, g, gdot:
  -0.000095   0.021555   0.000001   0.000192   0.022895   0.000000
# Chi-squared of fit:    15.26 DOF:   46 RMS:  0.14
# Min/Max residuals:    -0.36    0.33
# Exact a, adot, b, bdot, g, gdot:
  1.461808E-05  2.123853E-02 -3.514039E-07  1.888038E-04  2.267478E-02  2.405614E-05
# Covariance matrix:
  2.3456E-13 -3.8811E-14 -2.6950E-15 -2.0316E-16  1.6789E-13 -5.0021E-14
 -3.8811E-14  3.6937E-13 -4.5865E-15  6.3938E-15  2.0130E-13  6.3214E-12
 -2.6950E-15 -4.5865E-15  1.0399E-13 -4.5844E-14 -6.0827E-15 -8.5116E-14
 -2.0316E-16  6.3938E-15 -4.5844E-14  4.2957E-14  3.5164E-15  1.2425E-13
  1.6789E-13  2.0130E-13 -6.0827E-15  3.5164E-15  3.2914E-13  3.6656E-12
 -5.0021E-14  6.3214E-12 -8.5116E-14  1.2425E-13  3.6656E-12  1.2263E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.670778 -145.396575    0.950749    0.007649   -0.260434  2456332.068818
# Heliocentric elements and errors
Epoch:              2456330.5000  =  2013/02/07
Mean Anomaly:          228.26345 +/-     0.761
Argument of Peri:      205.65096 +/-     0.760
Long of Asc Node:      141.57604 +/-     0.018
Inclination:             1.74806 +/-     0.000
Eccentricity:         0.02524398 +/-    0.0004
Semi-Major Axis:     43.62212997 +/-    0.0035
Time of Perihelion: 2494839.5234 +/-     222.4
Perihelion:          42.52093383 +/-    0.0175
Aphelion:            44.72332610 +/-    0.0176
Period (y)              288.1167 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -37.03788444 +/-    0.0009
Ecliptic Y          -24.39791899 +/-    0.0006
Ecliptic Z            1.28583240 +/-    0.0000
Ecliptic XDOT         0.00144827 +/-    0.0000
Ecliptic YDOT        -0.00211111 +/-    0.0000
Ecliptic ZDOT         0.00002301 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   44.37022312 +/-    0.0008
Geocenter to KBO     44.10186097 +/-    0.0011
# Hcoef:  7.41

The following table shows the complete astrometric record for 13GP137. 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 (13GP137) followed by the observatory code and reference code for the source of the astrometry.

2013 02  08.56804  14 11 37.713  -11 28 52.72  23.3r 13GP137   568  C~1XRY      
2013 02  08.62754  14 11 37.653  -11 28 52.57  23.2r 13GP137   568  C~1XRY      
2013 04  04.42583  14 09 16.998  -11 14 50.37  23.2r 13GP137   568  C~1XRY      
2013 04  04.46629  14 09 16.822  -11 14 49.59  23.5r 13GP137   568  C~1XRY      
2013 04  04.50656  14 09 16.637  -11 14 48.66  23.7r 13GP137   568  C~1XRY      
2013 04  05.56132  14 09 12.292  -11 14 24.88  23.7r 13GP137   568  C~1XRY      
2013 04  05.56537  14 09 12.287  -11 14 24.74  23.1r 13GP137   568  C~1XRY      
2013 04  06.59893  14 09 07.984  -11 14 01.43  23.9r 13GP137   568  C~1XRY      
2013 04  08.39969  14 09 00.435  -11 13 19.80  21.8r 13GP137   568  C~1XRY      
2013 05  11.43388  14 06 36.781  -11 00 37.85  23.8r 13GP137   568  C~1XRY      
2013 05  12.43165  14 06 32.616  -11 00 16.28  23.8r 13GP137   568  C~1XRY      
2013 06  13.26956  14 04 41.558  -10 51 05.43  24.1r 13GP137   568  C~1XRY      
2013 06  13.30999  14 04 41.442  -10 51 04.95  23.8r 13GP137   568  C~1XRY      
2014 02  24.57010  14 16 02.712  -11 50 24.30  24.1r 13GP137   568  C~1XRY      
2014 02  25.53970  14 16 00.999  -11 50 13.11  24.1r 13GP137   568  C~1XRY      
2014 04  23.21750  14 12 43.31   -11 31 53.6         13GP137   W84  C~1j9S      
2014 04  24.23938  14 12 38.80   -11 31 30.0   24.5V 13GP137   W84  C~1j9S      
2014 04  25.23936  14 12 34.36   -11 31 06.9         13GP137   W84  C~1j9S      
2014 04  26.17361  14 12 30.20   -11 30 45.2         13GP137   W84  C~1j9S      
2014 05  22.46154  14 10 38.583  -11 21 15.78  24.2r 13GP137   568  C~1XRY      
2014 05  25.45403  14 10 27.193  -11 20 19.17  24.1r 13GP137   568  C~1XRY      
2016 03  13.36439  14 24 55.21   -12 33 22.9   24.3R 13GP137   G37  C~1pQU      
2016 03  13.44326  14 24 54.98   -12 33 21.5         13GP137   G37  C~1pQU      
2016 05  07.36834  14 21 14.951  -12 14 13.36  23.8r 13GP137   568  C~2KOG      
2016 05  07.43430  14 21 14.652  -12 14 11.83  23.9r 13GP137   568  C~2KOG      
2016 05  29.34785  14 19 44.899  -12 06 55.91  24.2w 13GP137   568  C~2KOG      

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     0.04       0.00     0.10
  2   0.0002     -0.88    -0.27      -0.15    -0.17
  3   0.1502  -2232.05     0.09     100.33     0.20
  4   0.1503  -2234.75     0.04     100.20     0.04
  5   0.1504  -2237.63    -0.19     100.16    -0.02
  6   0.1533  -2305.83    -0.04     101.08    -0.09
  7   0.1533  -2305.95     0.11     101.18     0.02
  8   0.1561  -2373.42     0.10     101.86    -0.24
  9   0.1611  -2492.03    -0.15     103.73     0.04
 10   0.2515  -4740.22    -0.02     108.17    -0.13
 11   0.2542  -4805.26     0.00     107.73    -0.02
 12   0.3414  -6532.13     0.13      71.66    -0.07
 13   0.3415  -6533.90     0.03      71.53    -0.11
 14   1.0431   4101.45     0.11      75.32     0.02
 15   1.0458   4074.01     0.16      77.57     0.14
 16   1.2010    969.29    -0.14     151.18     0.21
 17   1.2038    898.93     0.17     151.35     0.18
 18   1.2065    829.70     0.12     151.38     0.05
 19   1.2091    764.82    -0.20     151.45    -0.01
 20   1.2810   -972.17    -0.36     139.81    -0.06
 21   1.2892  -1148.97     0.33     137.04     0.15
 22   3.0905  12336.70     0.07     188.09    -0.22
 23   3.0907  12333.05     0.04     188.33    -0.09
 24   3.2411   8902.29    -0.02     228.91    -0.03
 25   3.2412   8897.64    -0.11     228.92     0.04
 26   3.3012   7509.23    -0.04     211.07     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.

13GP137    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.468    43.479    43.458
ecceobj         0.029     0.029     0.030
incobj          1.750     1.750     1.750
qmin           41.681    41.708    41.649
qmax           46.060    46.043    46.043
amean          43.773    43.784    43.763
amin           43.432    43.449    43.430
amax           44.118    44.133    44.101
emean           0.028     0.028     0.029
emin            0.011     0.011     0.011
emax            0.044     0.044     0.044
imean           1.722     1.718     1.724
imin            0.981     0.981     0.980
imax            2.371     2.364     2.377
excite_mean     0.041     0.041     0.042
fracstop        1.000     1.000     1.000
cjmean          3.097     3.097     3.097

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       184.0     182.4     187.3
kozaiamp        179.9     179.9     179.9