Orbit Fit and Astrometric record for 08KV42

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: 08KV42    
# Created Sun Oct 22 01:37:46 2017
# Orbit generated from Bernstein formalism
# Fitting   49 observations of   49
# Arc:   5.35y
# First observation: 2008/05/31
#  Last observation: 2013/10/06
Preliminary a, adot, b, bdot, g, gdot:
   0.001255  -0.012412  -0.001388   0.037566   0.033228   0.000000
# Chi-squared of fit:    54.61 DOF:   92 RMS:  0.19
# Min/Max residuals:    -0.46    0.52
# Exact a, adot, b, bdot, g, gdot:
 -4.877306E-06 -1.091132E-02  1.617648E-05  3.429739E-02  3.216694E-02 -1.697890E-02
# Covariance matrix:
  7.1536E-14 -3.2531E-14 -1.3663E-14  4.9490E-14  4.1667E-14  2.4726E-13
 -3.2531E-14  3.8399E-14  2.7798E-14 -6.7465E-14 -1.9977E-14 -3.4713E-13
 -1.3663E-14  2.7798E-14  7.6144E-14 -7.1155E-14 -4.5880E-15 -3.0554E-13
  4.9490E-14 -6.7465E-14 -7.1155E-14  1.5920E-13  5.9691E-14  7.7517E-13
  4.1667E-14 -1.9977E-14 -4.5880E-15  5.9691E-14  9.7996E-14  2.8518E-13
  2.4726E-13 -3.4713E-13 -3.0554E-13  7.7517E-13  2.8518E-13  3.9733E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   41.645433 -110.824457   -0.014610    0.670884   -0.754408  2454617.853094
# Heliocentric elements and errors
Epoch:              2454610.5000  =  2008/05/24
Mean Anomaly:          323.35273 +/-     0.005
Argument of Peri:      132.90618 +/-     0.003
Long of Asc Node:      260.89199 +/-     0.000
Inclination:           103.36076 +/-     0.000
Eccentricity:         0.49297206 +/-    0.0001
Semi-Major Axis:     41.68056408 +/-    0.0034
Time of Perihelion: 2464615.9791 +/-       0.4
Perihelion:          21.13321043 +/-    0.0029
Aphelion:            62.22791772 +/-    0.0056
Period (y)              269.0968 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           -8.60322666 +/-    0.0001
Ecliptic Y          -22.66681852 +/-    0.0002
Ecliptic Z           20.65885785 +/-    0.0002
Ecliptic XDOT         0.00021187 +/-    0.0000
Ecliptic YDOT         0.00315355 +/-    0.0000
Ecliptic ZDOT         0.00122099 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   31.85260709 +/-    0.0002
Geocenter to KBO     31.08781425 +/-    0.0003
# Hcoef:  8.80

The following table shows the complete astrometric record for 08KV42. 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 (08KV42) followed by the observatory code and reference code for the source of the astrometry.

2008 05  31.35234  16 54 34.36   +19 22 53.0   23.7r 08KV42    568  Cz2846      
2008 05  31.39302  16 54 34.02   +19 22 54.6   23.7r 08KV42    568  Cz2846      
2008 05  31.43442  16 54 33.68   +19 22 56.0   23.8r 08KV42    568  Cz2846      
2008 06  08.21175  16 53 30.53   +19 26 59.1         08KV42    807  Cz2846      
2008 06  08.25591  16 53 30.18   +19 27 00.6         08KV42    807  Cz2846      
2008 06  09.18104  16 53 22.68   +19 27 24.4         08KV42    807  Cz2846      
2008 06  23.36633  16 51 29.67   +19 31 06.1         08KV42    696  Cz2846      
2008 06  23.41398  16 51 29.31   +19 31 06.2         08KV42    696  Cz2846      
2008 06  24.35315  16 51 22.08   +19 31 11.5         08KV42    696  Cz2846      
2008 06  24.40592  16 51 21.67   +19 31 11.8         08KV42    696  Cz2846      
2008 07  08.12345  16 49 41.23   +19 30 25.7         08KV42    I11  Cz4135      
2008 07  08.13106  16 49 41.18   +19 30 25.6         08KV42    I11  Cz4135      
2008 07  08.14480  16 49 41.10   +19 30 25.4         08KV42    I11  Cz4135      
2008 07  08.14961  16 49 41.06   +19 30 25.4         08KV42    I11  Cz4135      
2008 07  08.15439  16 49 41.02   +19 30 25.3         08KV42    I11  Cz4135      
2008 08  04.26572  16 47 08.01   +19 18 37.6         08KV42    568  C~04FY      
2008 08  04.30203  16 47 07.87   +19 18 36.0         08KV42    568  C~04FY      
2008 08  04.33685  16 47 07.70   +19 18 34.9         08KV42    568  C~04FY      
2008 09  24.22527  16 46 17.52   +18 36 08.7         08KV42    568  C66625      
2008 09  24.24266  16 46 17.56   +18 36 07.9         08KV42    568  C66625      
2009 03  27.59187  17 00 01.07   +20 08 18.8         08KV42    568  C~07fB      
2009 03  27.61502  17 00 01.00   +20 08 21.3         08KV42    568  C~07fB      
2009 04  23.38175  16 57 57.76   +20 48 35.0         08KV42    568  C~07fB      
2009 04  23.42163  16 57 57.51   +20 48 38.3         08KV42    568  C~07fB      
2009 04  23.62334  16 57 56.25   +20 48 54.7         08KV42    568  C~1QdV      
2009 06  21.32155  16 50 18.39   +21 35 11.8         08KV42    695  C~07fB      
2009 06  21.35944  16 50 18.09   +21 35 11.7         08KV42    695  C~07fB      
2009 06  22.33251  16 50 10.26   +21 35 20.0         08KV42    695  C~07fB      
2009 07  25.22511  16 46 21.80   +21 27 50.2         08KV42    675  C~1QdV      
2009 07  25.22925  16 46 21.78   +21 27 50.2         08KV42    675  C~1QdV      
2009 07  25.28231  16 46 21.49   +21 27 48.4         08KV42    675  C~1QdV      
2009 07  25.28651  16 46 21.47   +21 27 48.3         08KV42    675  C~1QdV      
2009 08  18.20530  16 44 43.75   +21 10 46.1   23.7r 08KV42    675  C~1QdV      
2009 08  18.27687  16 44 43.54   +21 10 42.4         08KV42    675  C~1QdV      
2009 08  19.18418  16 44 41.29   +21 09 56.0         08KV42    675  C~1QdV      
2009 08  19.19920  16 44 41.25   +21 09 55.3         08KV42    675  C~1QdV      
2009 09  13.22765  16 44 22.26   +20 46 42.2         08KV42    568  C~1QdV      
2009 09  15.22930  16 44 24.40   +20 44 47.4         08KV42    568  C~1QdV      
2010 03  20.47789  16 59 05.64   +22 01 25.7         08KV42    675  C~1QdV      
2010 03  20.50891  16 59 05.60   +22 01 29.1         08KV42    675  C~1QdV      
2013 07  06.00159  16 40 55.29   +30 36 53.6         08KV42    950  C~1QdV      
2013 07  07.02146  16 40 46.86   +30 36 32.8         08KV42    950  C~1QdV      
2013 07  07.06493  16 40 46.50   +30 36 31.9         08KV42    950  C~1QdV      
2013 07  07.42118  16 40 43.57   +30 36 23.9         08KV42    568  C~1QdV      
2013 07  08.41701  16 40 35.49   +30 36 01.7         08KV42    568  C~1QdV      
2013 08  05.33645  16 37 34.23   +30 16 47.1         08KV42    568  C~1QdV      
2013 09  02.25144  16 36 22.33   +29 46 02.0         08KV42    568  C~1QdV      
2013 09  05.32279  16 36 21.81   +29 42 20.8         08KV42    568  C~1QdV      
2013 10  06.24373  16 37 36.29   +29 06 41.1         08KV42    568  C~1QdV      

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     0.14
  2   0.0001     -5.00    -0.21       0.86     0.24
  3   0.0002     -9.96    -0.19       1.52     0.13
  4   0.0215   -929.61     0.06     108.67    -0.05
  5   0.0216   -934.73     0.19     109.42     0.33
  6   0.0242  -1043.17     0.16     117.23     0.52
  7   0.0630  -2656.58    -0.07     101.87     0.14
  8   0.0631  -2661.63     0.13     101.23    -0.03
  9   0.0657  -2763.55     0.37      91.61    -0.21
 10   0.0659  -2769.33     0.37      91.07    -0.17
 11   0.1034  -4168.33    -0.19    -159.21     0.08
 12   0.1034  -4169.02    -0.14    -159.41     0.08
 13   0.1035  -4170.11     0.08    -159.77     0.07
 14   0.1035  -4170.67    -0.01    -159.85     0.12
 15   0.1035  -4171.22    -0.10    -160.03     0.06
 16   0.1777  -6215.82    -0.14   -1166.45    -0.22
 17   0.1778  -6217.56     0.14   -1168.31    -0.38
 18   0.1779  -6219.79    -0.17   -1169.74    -0.17
 19   0.3172  -6572.32    -0.11   -3791.83    -0.11
 20   0.3173  -6571.65    -0.10   -3792.54     0.02
 21   0.8220   4138.69    -0.02    3403.67    -0.24
 22   0.8221   4137.32    -0.06    3405.98     0.03
 23   0.8954   2048.68     0.09    5520.05    -0.42
 24   0.8955   2044.70     0.05    5522.77    -0.39
 25   0.8960   2024.70     0.05    5536.24    -0.38
 26   1.0567  -4725.37     0.08    7329.42    -0.07
 27   1.0568  -4729.50     0.27    7328.72    -0.46
 28   1.0595  -4838.90     0.26    7321.32     0.17
 29   1.1495  -7936.32    -0.16    6428.58     0.02
 30   1.1496  -7936.60    -0.14    6428.54     0.16
 31   1.1497  -7940.37    -0.04    6426.20     0.12
 32   1.1497  -7940.63     0.01    6426.06     0.16
 33   1.2152  -9155.85     0.04    5225.95    -0.16
 34   1.2154  -9158.27    -0.24    5221.88    -0.21
 35   1.2179  -9183.21     0.08    5171.58    -0.02
 36   1.2179  -9183.67     0.05    5170.81     0.05
 37   1.2864  -9258.71    -0.00    3752.52     0.10
 38   1.2919  -9213.35    -0.01    3642.65     0.31
 39   1.8018   2304.87    -0.36    9991.86     0.18
 40   1.8019   2303.79    -0.03    9995.14     0.44
 41   5.0969 -16833.82     0.20   39051.53     0.19
 42   5.0997 -16941.51     0.07   39016.81     0.13
 43   5.0998 -16946.11     0.08   39015.31     0.17
 44   5.1008 -16983.44    -0.07   39002.46    -0.29
 45   5.1035 -17086.38     0.04   38966.88    -0.10
 46   5.1800 -19315.16    -0.08   37499.26     0.02
 47   5.2564 -20025.69     0.07   35493.37    -0.21
 48   5.2648 -20004.22    -0.05   35265.22     0.11
 49   5.3495 -18741.36    -0.15   33182.05    -0.02

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.

08KV42    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        41.819    41.828    41.811
ecceobj         0.493     0.493     0.493
incobj        103.558   103.558   103.558
qmin           17.539    17.204    17.455
qmax           66.539    67.082    66.409
amean          41.592    41.610    41.604
amin           41.217    41.217    41.234
amax           42.250    42.268    42.255
emean           0.497     0.509     0.503
emin            0.438     0.453     0.448
emax            0.577     0.587     0.581
imean         104.920   105.006   104.935
imin          104.028   104.056   104.056
imax          106.072   106.102   105.999
excite_mean     1.087     1.093     1.090
fracstop        0.934     0.375     0.648
cjmean          0.199     0.201     0.200

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       174.4     170.7     173.4
kozaiamp        179.9     179.9     179.9