Orbit Fit and Astrometric record for 12DB99

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: 12DB99    
# Created Mon Oct 23 01:38:10 2017
# Orbit generated from Bernstein formalism
# Fitting   29 observations of   33
# Arc:   4.17y
# First observation: 2010/02/20
#  Last observation: 2014/04/24
Preliminary a, adot, b, bdot, g, gdot:
  -0.000085   0.024886  -0.000042  -0.003401   0.024480   0.000000
# Chi-squared of fit:    16.37 DOF:   52 RMS:  0.13
# Min/Max residuals:    -0.36    0.39
# Exact a, adot, b, bdot, g, gdot:
  1.527474E-05  2.542608E-02 -2.112052E-06 -3.469382E-03  2.602176E-02  5.361415E-03
# Covariance matrix:
  6.0112E-13 -5.0531E-13 -4.6500E-14  6.1058E-14 -9.0852E-14 -4.4249E-12
 -5.0531E-13  7.0256E-13  7.9776E-14 -1.0329E-13  3.4015E-13  7.4405E-12
 -4.6500E-14  7.9776E-14  3.4375E-13 -1.3708E-13  4.2947E-14  9.1589E-13
  6.1058E-14 -1.0329E-13 -1.3708E-13  7.1281E-14 -5.3458E-14 -1.1868E-12
 -9.0852E-14  3.4015E-13  4.2947E-14 -5.3458E-14  4.5489E-13  3.7832E-12
 -4.4249E-12  7.4405E-12  9.1589E-13 -1.1868E-12  3.7832E-12  8.5523E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    6.130388 -168.650279    0.635516    0.081544   -0.759313  2455248.011396
# Heliocentric elements and errors
Epoch:              2455240.5000  =  2010/02/13
Mean Anomaly:           78.15250 +/-     0.053
Argument of Peri:       41.75146 +/-     0.032
Long of Asc Node:       48.43024 +/-     0.002
Inclination:             9.70325 +/-     0.000
Eccentricity:         0.18828609 +/-    0.0003
Semi-Major Axis:     39.32384084 +/-    0.0065
Time of Perihelion: 2435687.0824 +/-      12.4
Perihelion:          31.91970847 +/-    0.0142
Aphelion:            46.72797321 +/-    0.0153
Period (y)              246.5994 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -38.33221245 +/-    0.0010
Ecliptic Y           -7.04995904 +/-    0.0002
Ecliptic Z            4.10384924 +/-    0.0001
Ecliptic XDOT        -0.00005915 +/-    0.0000
Ecliptic YDOT        -0.00273515 +/-    0.0000
Ecliptic ZDOT        -0.00030276 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.19058577 +/-    0.0009
Geocenter to KBO     38.42937130 +/-    0.0010
# Hcoef:  6.27

The following table shows the complete astrometric record for 12DB99. 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 (12DB99) followed by the observatory code and reference code for the source of the astrometry.

2010 02  20.51063  12 51 19.065  +01 09 15.59  21.4r 12DB99    F51  C~1w3p      
2010 08  05.25850  12 45 16.066  +01 29 06.37  22.3w 12DB99    F51  C~1w3p      
2011 03  10.57222  12 55 12.221  +00 32 40.30  22.4r 12DB99    F51  C~1w3p      
2011 03  12.57825  12 55 03.483  +00 33 39.01  22.1i 12DB99    F51  C~1w3p      
2011 03  12.59143  12 55 03.437  +00 33 39.66  22.0i 12DB99    F51  C~1w3p      
2011 03  14.56732  12 54 54.705  +00 34 37.91  22.3r 12DB99    F51  C~1w3p      
2011 03  15.56230  12 54 50.275  +00 35 07.15  21.9i 12DB99    F51  C~1w3q      
2012 02  28.53448  13 00 52.480  -00 16 38.54  22.8w 12DB99    F51  C~1w3q      
2012 02  28.54889  13 00 52.429  -00 16 38.25  22.9w 12DB99    F51  C~1w3q      
2012 02  28.56333  13 00 52.372  -00 16 37.97  22.9w 12DB99    F51  C~1w3q      
2012 04  12.34716  12 57 35.392  +00 04 06.46  22.3w 12DB99    F51  C~1w3q      
2012 04  12.36107  12 57 35.326  +00 04 06.82  22.0w 12DB99    F51  C~1w3q      
2012 04  12.37507  12 57 35.259  +00 04 07.17  22.0w 12DB99    F51  C~1w3q      
2012 04  12.38905  12 57 35.181  +00 04 07.53  21.9w 12DB99    F51  C~1w3q      
2012 04  15.48813  12 57 20.398  +00 05 28.70  21.9r 12DB99    F51  C~1w3q      
2012 12  22.61467  13 06 38.196  -01 12 49.37  22.2w 12DB99    F51  C~1w3q      
2012 12  22.61927  13 06 38.216  -01 12 49.53  22.2w 12DB99    F51  C~1w3q      
2012 12  22.62389  13 06 38.211  -01 12 49.34  22.3w 12DB99    F51  C~1w3q      
2012 12  22.62849  13 06 38.218  -01 12 49.53  22.2w 12DB99    F51  C~1w3q      
2013 03  19.49368  13 04 27.816  -00 51 33.48  22.3w 12DB99    F51  C~1w3q      
2013 03  19.50909  13 04 27.742  -00 51 33.01  22.1w 12DB99    F51  C~1w3q      
2013 03  19.52451  13 04 27.655  -00 51 32.72  21.9w 12DB99    F51  C~1w3q      
2013 03  19.53993  13 04 27.605  -00 51 32.24  21.9w 12DB99    F51  C~1w3q      
2013 04  05.44400  13 03 07.990  -00 43 27.80  21.9r 12DB99    F51  C~1w3q      
2013 04  11.37449  13 02 39.489  -00 40 45.03  22.2w 12DB99    F51  C~1w3q      
2013 04  11.38815  13 02 39.422  -00 40 44.72  22.2w 12DB99    F51  C~1w3q      
2013 04  11.40185  13 02 39.356  -00 40 44.11  22.0w 12DB99    F51  C~1w3q      
2013 04  11.41561  13 02 39.288  -00 40 43.97  22.3w 12DB99    F51  C~1w3q      
2013 04  20.46728  13 01 56.428  -00 36 50.94  21.8i 12DB99    F51  C~1w3q      
2013 05  02.33024  13 01 03.397  -00 32 23.54  21.6r 12DB99    F51  C~1w3q      
2014 04  24.34613  13 06 35.513  -01 19 17.06  22.2w 12DB99    F51  C~1w3q      
2014 04  24.35736  13 06 35.436  -01 19 16.23  21.8w 12DB99    F51  C~1w3q      
2014 04  24.37991  13 06 35.305  -01 19 16.23  22.1w 12DB99    F51  C~1w3q      

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     0.00
  2   0.4538  -5478.44    -0.15   -1025.60    -0.06
  3   1.0488   4076.89     0.39    -656.82     0.04
  4   1.0543   3933.25    -0.11    -653.92    -0.28
  5   1.0543   3932.36    -0.04    -653.59     0.04
  6   1.0597   3788.99    -0.13    -651.07    -0.01
  7   1.0624   3716.38     0.21    -650.08    -0.08
  8   2.0206   9938.10    -0.04   -1389.52     0.15
  9   2.0206   9937.28     0.04   -1389.55     0.09
 10   2.0207   9936.38     0.04   -1389.63    -0.03
 11   2.1406   6724.97    -0.00   -1396.91     0.12
 12   2.1406   6723.91     0.03   -1396.96     0.12
 13   2.1406   6722.85     0.05   -1397.03     0.11
 14   2.1407   6721.63    -0.08   -1397.16     0.04
 15   2.1492   6485.55    -0.23   -1408.97     0.14
 16   2.8367  16052.86    -0.08   -2473.71    -0.06
 17   2.8367  16053.20     0.09   -2473.74    -0.12
 18   2.8367  16053.06    -0.21   -2473.60     0.00
 19   2.8367  16053.23    -0.21   -2473.73    -0.16
 20   3.0746  13742.35     0.11   -2059.74     0.11
 21   3.0746  13741.14     0.06   -2059.74     0.12
 22   3.0746  13739.82    -0.10   -2059.99    -0.12
 23   3.0747  13738.94     0.18   -2059.84     0.04
 24   3.1210  12445.20    -0.36   -2079.42    -0.22
 25   3.1372  11986.47     0.11   -2096.28    -0.01
 26   3.1372  11985.42     0.13   -2096.39    -0.06
 27   3.1373  11984.27     0.05   -2096.21     0.17
 28   3.1373  11983.27     0.13   -2096.48    -0.05
 29   3.1621  11298.25 (   0.45)  -2132.69 (   0.01)
 30   3.1946  10459.18 (   0.42)  -2196.80 (   0.53)
 31   4.1720  16167.91 (   0.80)  -2847.65 (   0.21)
 32   4.1721  16166.52 (   0.23)  -2847.33 (   0.59)
 33   4.1721  16164.70     0.08   -2848.10    -0.06

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.

12DB99    quality flag:3

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

axisobj        39.318    39.337    39.298
ecceobj         0.191     0.191     0.190
incobj          9.713     9.713     9.713
qmin           31.354    31.312    31.316
qmax           48.173    48.172    48.097
amean          39.456    39.456    39.456
amin           39.046    39.020    39.032
amax           39.950    39.957    39.945
emean           0.186     0.186     0.186
emin            0.165     0.167     0.165
emax            0.207     0.207     0.206
imean           8.576     8.567     8.586
imin            7.964     7.966     7.965
imax            9.352     9.350     9.345
excite_mean     0.239     0.239     0.238
fracstop        1.000     1.000     1.000
cjmean          2.987     2.987     2.987

libcent 0       180.1     180.3     179.1
libamp  0        72.9      75.5      68.9
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       183.5     184.4     181.7
kozaiamp        180.0     180.0     180.0