Orbit Fit and Astrometric record for 13GL137

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: 13GL137   
# Created Tue Dec 12 02:37:57 2017
# Orbit generated from Bernstein formalism
# Fitting   35 observations of   36
# Arc:   2.04y
# First observation: 2013/04/04
#  Last observation: 2015/04/20
Preliminary a, adot, b, bdot, g, gdot:
  -0.000068   0.033269   0.000017  -0.006105   0.029634   0.000000
# Chi-squared of fit:    16.71 DOF:   64 RMS:  0.12
# Min/Max residuals:    -0.35    0.33
# Exact a, adot, b, bdot, g, gdot:
  1.800068E-05  3.310513E-02 -3.340333E-06 -6.062822E-03  2.990064E-02 -4.938229E-03
# Covariance matrix:
  8.4744E-14 -5.6799E-14 -3.0445E-17  8.4969E-16  4.4598E-14 -8.1405E-14
 -5.6799E-14  5.8615E-13  1.2659E-14 -1.0344E-13  2.2625E-13  1.0316E-11
 -3.0445E-17  1.2659E-14  6.9165E-14 -5.9310E-14  6.0731E-15  2.7989E-13
  8.4969E-16 -1.0344E-13 -5.9310E-14  1.4235E-13 -4.7936E-14 -2.2899E-12
  4.4598E-14  2.2625E-13  6.0731E-15 -4.7936E-14  2.3539E-13  4.7903E-12
 -8.1405E-14  1.0316E-11  2.7989E-13 -2.2899E-12  4.7903E-12  2.2836E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.064998 -140.445696    0.418059    0.016939   -0.910057  2456387.063488
# Heliocentric elements and errors
Epoch:              2456380.5000  =  2013/03/29
Mean Anomaly:          317.29285 +/-     0.036
Argument of Peri:      235.32105 +/-     0.076
Long of Asc Node:       44.48401 +/-     0.000
Inclination:            10.45301 +/-     0.001
Eccentricity:         0.19734555 +/-    0.0004
Semi-Major Axis:     39.16205278 +/-    0.0068
Time of Perihelion: 2466999.7717 +/-       8.4
Perihelion:          31.43359579 +/-    0.0174
Aphelion:            46.89050976 +/-    0.0184
Period (y)              245.0792 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -26.74859373 +/-    0.0004
Ecliptic Y          -21.54906154 +/-    0.0003
Ecliptic Z            0.62153536 +/-    0.0000
Ecliptic XDOT         0.00226466 +/-    0.0000
Ecliptic YDOT        -0.00205544 +/-    0.0000
Ecliptic ZDOT        -0.00056331 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   34.35455757 +/-    0.0004
Geocenter to KBO     33.44409670 +/-    0.0005
# Hcoef:  8.59

The following table shows the complete astrometric record for 13GL137. 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 (13GL137) followed by the observatory code and reference code for the source of the astrometry.

2013 04  04.56271  14 30 00.339  -13 39 46.97  23.9r 13GL137   568  C~1XRX      
2013 04  07.42293  14 29 45.671  -13 38 43.75  23.5r 13GL137   568  C~1XRX      
2013 04  07.50053  14 29 45.273  -13 38 42.05  23.5r 13GL137   568  C~1XRX      
2013 04  08.45527  14 29 40.288  -13 38 20.38        13GL137   568  C~1XRX      
2013 04  08.50045  14 29 40.043  -13 38 19.50  23.4r 13GL137   568  C~1XRX      
2013 04  08.50934  14 29 39.974  -13 38 18.64  23.8r 13GL137   568  C~1XRX      
2013 04  08.54607  14 29 39.791  -13 38 18.07  23.2r 13GL137   568  C~1XRX      
2013 04  09.40177  14 29 35.283  -13 37 58.75  23.6r 13GL137   568  C~1XRX      
2013 04  09.44495  14 29 35.067  -13 37 57.88  23.9r 13GL137   568  C~1XRX      
2013 04  09.48873  14 29 34.832  -13 37 56.93  24.6r 13GL137   568  C~1XRX      
2013 04  09.49693  14 29 34.792  -13 37 56.68  23.0r 13GL137   568  C~1XRX      
2013 04  09.50177  14 29 34.752  -13 37 56.55        13GL137   568  C~1XRX      
2013 04  09.50867  14 29 34.718  -13 37 56.36  23.6r 13GL137   568  C~1XRX      
2013 04  09.53112  14 29 34.598  -13 37 56.00  23.9r 13GL137   568  C~1XRX      
2013 04  10.50021  14 29 29.443  -13 37 33.81  23.7r 13GL137   568  C~1XRX      
2013 04  10.54048  14 29 29.238  -13 37 32.86  23.8r 13GL137   568  C~1XRX      
2013 05  11.49012  14 26 35.023  -13 25 09.17  23.9r 13GL137   568  C~1XRX      
2013 05  12.49343  14 26 29.427  -13 24 45.72  23.8r 13GL137   568  C~1XRX      
2013 06  12.38761  14 24 00.104  -13 14 47.17  24.0r 13GL137   568  C~1XRX      
2013 06  12.43333  14 23 59.919  -13 14 46.79  24.3r 13GL137   568  C~1XRX      
2013 07  06.27023  14 22 54.173  -13 11 20.78  24.3r 13GL137   568  C~1XRX      
2013 07  07.29688  14 22 52.618  -13 11 18.51        13GL137   568  C~1XRX      
2013 08  02.28256  14 22 50.794  -13 13 26.59  24.0r 13GL137   568  C~1XRY      
2013 08  05.28429  14 22 55.391  -13 14 05.11  23.9r 13GL137   568  C~1XRY      
2014 02  24.61674  14 39 16.772  -14 44 13.34  23.9r 13GL137   568  C~1XRY      
2014 02  25.59980  14 39 15.195  -14 44 08.42  23.7r 13GL137   568  C~1XRY      
2014 02  28.54777  14 39 09.852  -14 43 50.14  24.0r 13GL137   568  C~1XRY      
2014 04  04.45085  14 37 03.034  -14 35 28.29        13GL137   568  C~1XRY      
2014 04  04.49069  14 37 02.817  -14 35 27.46  23.7r 13GL137   568  C~1XRY      
2014 04  05.57974  14 36 57.347  -14 35 04.83  23.6r 13GL137   568  C~1XRY      
2014 05  22.42509  14 32 35.996  -14 17 12.44  24.0r 13GL137   568  C~1XRY      
2014 05  25.35772  14 32 20.543  -14 16 10.61  23.6r 13GL137   568  C~1XRY      
2014 06  26.34615  14 30 08.430  -14 07 55.82  24.0r 13GL137   568  C~1XRY      
2014 07  18.30910  14 29 31.324  -14 06 38.56  23.8r 13GL137   568  C~1XRY      
2015 04  20.42535  14 42 48.367  -15 25 20.16  23.7r 13GL137   568  C~2KOF      
2015 04  20.46573  14 42 48.156  -15 25 19.56  23.8r 13GL137   568  C~2KOF      

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     0.03
  2   0.0078   -222.83    -0.10      -7.52    -0.08
  3   0.0080   -228.87     0.10      -7.74    -0.05
  4   0.0107   -304.66     0.10     -10.14     0.10
  5   0.0108   -308.32     0.11     -10.43    -0.05
  6   0.0108   -309.55 (  -0.40)     -9.93 (   0.47)
  7   0.0109   -312.26    -0.12     -10.23     0.29
  8   0.0132   -380.71    -0.21     -12.67     0.10
  9   0.0134   -383.98     0.06     -12.84     0.08
 10   0.0135   -387.53     0.09     -13.02     0.04
 11   0.0135   -388.16     0.13     -12.97     0.12
 12   0.0135   -388.75    -0.06     -13.03     0.07
 13   0.0135   -389.28    -0.03     -13.00     0.12
 14   0.0136   -391.06     0.04     -13.22    -0.02
 15   0.0163   -469.37     0.00     -15.92    -0.07
 16   0.0164   -472.50     0.19     -15.96     0.01
 17   0.1011  -3118.17     0.07    -117.57    -0.14
 18   0.1038  -3203.05    -0.07    -121.39    -0.14
 19   0.1884  -5460.48    -0.10    -252.33    -0.07
 20   0.1886  -5463.16    -0.09    -252.84    -0.35
 21   0.2538  -6439.25    -0.11    -366.94     0.02
 22   0.2566  -6461.50     0.33    -372.12    -0.06
 23   0.3278  -6445.40    -0.08    -502.01    -0.01
 24   0.3360  -6369.37    -0.11    -516.83     0.12
 25   0.8927   8898.07     0.13   -1159.20    -0.00
 26   0.8954   8874.74    -0.03   -1161.52    -0.19
 27   0.9034   8795.21    -0.20   -1167.85    -0.06
 28   0.9990   6886.93     0.06   -1255.89     0.06
 29   0.9991   6883.67    -0.14   -1256.07     0.02
 30   1.0021   6801.06    -0.03   -1259.04     0.24
 31   1.1304   2856.95     0.16   -1419.55     0.02
 32   1.1384   2624.21    -0.08   -1431.17    -0.07
 33   1.2260    644.74    -0.02   -1565.42    -0.13
 34   1.2861    108.18     0.05   -1662.57    -0.05
 35   2.0421  12578.46    -0.17   -2579.60     0.16
 36   2.0422  12575.36     0.22   -2579.95    -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.

13GL137    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.034    39.048    39.020
ecceobj         0.198     0.199     0.197
incobj         10.467    10.467    10.466
qmin           28.756    28.725    29.029
qmax           50.819    50.682    50.407
amean          39.456    39.455    39.456
amin           38.968    38.999    38.962
amax           40.027    39.985    40.034
emean           0.234     0.236     0.229
emin            0.193     0.194     0.191
emax            0.271     0.270     0.262
imean           7.285     7.128     7.834
imin            4.569     4.623     5.560
imax            9.856     9.864     9.855
excite_mean     0.268     0.269     0.267
fracstop        1.000     1.000     1.000
cjmean          2.969     2.969     2.970

libcent 0       180.2     180.0     179.4
libamp  0        97.1      91.1     101.4
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        85.9      94.2     105.9
kozaiamp        113.5     107.6     180.0