Orbit Fit and Astrometric record for 08ST291

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: 08ST291   
# Created Sat Oct 21 01:37:46 2017
# Orbit generated from Bernstein formalism
# Fitting   25 observations of   28
# Arc:   9.00y
# First observation: 2008/09/24
#  Last observation: 2017/09/23
Preliminary a, adot, b, bdot, g, gdot:
   0.000344   0.014630   0.000139   0.004423   0.017808   0.000000
# Chi-squared of fit:    60.73 DOF:   44 RMS:  0.28
# Min/Max residuals:    -0.55    0.65
# Exact a, adot, b, bdot, g, gdot:
  8.119463E-06  1.555395E-02  5.261999E-06  4.702349E-03  1.794742E-02  7.563109E-03
# Covariance matrix:
  1.5848E-13 -1.7808E-13  2.7623E-14 -4.9550E-14  1.5500E-14 -1.2111E-12
 -1.7808E-13  3.4871E-13 -5.8556E-14  1.0224E-13 -5.4563E-14  2.4951E-12
  2.7623E-14 -5.8556E-14  8.9587E-14 -3.2618E-14  2.1340E-14 -4.3298E-13
 -4.9550E-14  1.0224E-13 -3.2618E-14  4.3107E-14 -1.7155E-14  7.5766E-13
  1.5500E-14 -5.4563E-14  2.1340E-14 -1.7155E-14  1.7566E-13 -3.9031E-13
 -1.2111E-12  2.4951E-12 -4.3298E-13  7.5766E-13 -3.9031E-13  1.8493E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   12.458676    5.994227    0.076102    0.215493   -0.975301  2454733.671394
# Heliocentric elements and errors
Epoch:              2454730.5000  =  2008/09/21
Mean Anomaly:           19.29587 +/-     0.022
Argument of Peri:      324.99747 +/-     0.007
Long of Asc Node:      330.97351 +/-     0.001
Inclination:            20.74888 +/-     0.000
Eccentricity:         0.57779902 +/-    0.0004
Semi-Major Axis:    100.49797838 +/-    0.0747
Time of Perihelion: 2435006.4463 +/-       4.2
Perihelion:          42.43034515 +/-    0.0482
Aphelion:           158.56561161 +/-    0.1233
Period (y)             1007.4980 +/-      1.12
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           55.11153653 +/-    0.0013
Ecliptic Y            5.70584914 +/-    0.0001
Ecliptic Z           12.02073184 +/-    0.0003
Ecliptic XDOT         0.00072483 +/-    0.0000
Ecliptic YDOT         0.00246330 +/-    0.0000
Ecliptic ZDOT         0.00094923 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   56.69511590 +/-    0.0012
Geocenter to KBO     55.71832844 +/-    0.0013
# Hcoef:  4.27

The following table shows the complete astrometric record for 08ST291. 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 (08ST291) followed by the observatory code and reference code for the source of the astrometry.

2008 09  24.17064  00 01 49.60   +13 47 51.7   21.5R 08ST291   675  C~0BHs      
2008 09  24.31175  00 01 49.01   +13 47 48.8   22.1R 08ST291   675  C~0BHs      
2008 09  25.16143  00 01 46.03   +13 47 32.2   21.1R 08ST291   675  C~0BHs      
2008 09  25.20268  00 01 45.87   +13 47 32.3   21.5R 08ST291   675  C~0BHs      
2008 10  07.11526  00 01 04.45   +13 43 27.4         08ST291   675  C~0BHs      
2008 10  29.325628 23 59 55.36   +13 35 05.7   21.6V 08ST291   645  C~1Fih      
2008 10  29.326457 23 59 55.36   +13 35 05.7   21.3V 08ST291   645  C~1Fih      
2008 10  29.328945 23 59 55.35   +13 35 05.7   22.5V 08ST291   645  C~1Fih      
2008 11  19.07748  23 59 09.11   +13 27 37.1         08ST291   675  C~0BHs      
2008 11  19.33084  23 59 08.65   +13 27 32.5         08ST291   675  C~0BHs      
2009 06  28.39402  00 07 53.54   +14 25 55.8         08ST291   675  C~0BHs      
2009 06  29.39168  00 07 53.67   +14 26 13.5         08ST291   675  C~0BHs      
2009 06  30.38845  00 07 53.73   +14 26 31.4         08ST291   675  C~0BHs      
2009 07  02.47729  00 07 53.67   +14 27 06.9         08ST291   675  C~0BHs      
2009 07  07.46522  00 07 52.35   +14 28 24.4         08ST291   675  C~0BHs      
2009 07  31.30379  00 07 24.73   +14 31 58.7         08ST291   675  C~0BHs      
2009 07  31.40035  00 07 24.54   +14 31 58.7         08ST291   675  C~0BHs      
2009 07  31.49606  00 07 24.34   +14 32 00.0         08ST291   675  C~0BHs      
2009 08  15.41042  00 06 50.86   +14 31 56.6         08ST291   675  C~0BHs      
2009 08  16.35636  00 06 48.43   +14 31 52.9         08ST291   675  C~0BHs      
2009 10  11.39312  00 03 44.51   +14 18 15.3         08ST291   675  C~0BHs      
2009 10  11.44477  00 03 44.35   +14 18 14.2         08ST291   675  C~0BHs      
2009 10  18.22399  00 03 22.35   +14 15 42.0         08ST291   568  C~0BHs      
2009 10  18.25466  00 03 22.25   +14 15 41.3         08ST291   568  C~0BHs      
2010 10  09.11773  00 06 45.04   +14 54 49.4   21.5R 08ST291   688  C~0NmC      
2010 10  09.18404  00 06 44.81   +14 54 47.0         08ST291   688  C~0NmC      
2017 09  23.33988  00 26 54.80   +18 50 48.5   21.5R 08ST291   G37  C~2LR4      
2017 09  23.43215  00 26 54.51   +18 50 46.9         08ST291   G37  C~2LR4      

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 (   1.15)      0.00 (  -0.23)
  2   0.0004     -9.03    -0.09       0.85     0.07
  3   0.0027    -55.44    -0.18       3.38    -0.24
  4   0.0028    -57.53     0.01       4.42     0.65
  5   0.0354   -708.41    -0.44      26.86     0.65
  6   0.0962  -1832.61     0.33     -19.55    -0.52
  7   0.0963  -1832.61     0.37     -19.55    -0.52
  8   0.0963  -1832.74     0.35     -19.49    -0.45
  9   0.1531  -2631.78    -0.13    -152.59    -0.55
 10   0.1538  -2639.79    -0.33    -154.04     0.01
 11   0.7590   5767.21     0.04     -52.20     0.22
 12   0.7617   5776.05    -0.08     -36.74    -0.07
 13   0.7645   5784.04    -0.02     -20.69     0.24
 14   0.7702   5797.50     0.20      12.18     0.12
 15   0.7838   5811.07     0.19      90.89     0.33
 16   0.8491   5529.63     0.15     448.39     0.31
 17   0.8494   5527.10    -0.08     449.50     0.03
 18   0.8496   5524.96 (   0.10)    451.86 (   1.02)
 19   0.8905   5078.22    -0.40     644.31     0.24
 20   0.8930   5044.41     0.14     655.12    -0.07
 21   1.0465   2269.02     0.10     986.64     0.08
 22   1.0466   2266.45     0.30     986.58     0.04
 23   1.0652   1912.36    -0.09     977.20    -0.27
 24   1.0653   1910.75    -0.12     977.15    -0.27
 25   2.0396   5553.87 (   0.19)   1935.52 (   0.94)
 26   2.0397   5549.85    -0.25    1934.66     0.06
 27   8.9970  27239.22    -0.14    8223.61     0.11
 28   8.9973  27234.73     0.16    8223.68    -0.17

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.

08ST291    quality flag:2

Type:       6:1EEEEE  SCATNEAR  6:1EEEEE

axisobj       100.823   101.047   100.601
ecceobj         0.577     0.578     0.576
incobj         20.757    20.757    20.757
qmin           40.109    40.607    39.450
qmax          162.998   162.902   163.180
amean          99.418    99.647    99.419
amin           97.682    97.568    97.758
amax          102.077   102.277   101.943
emean           0.582     0.575     0.584
emin            0.564     0.557     0.564
emax            0.597     0.593     0.603
imean          20.796    21.680    20.460
imin           19.900    20.725    18.986
imax           22.118    22.670    22.111
excite_mean     0.681     0.684     0.681
fracstop        1.000     1.000     1.000
cjmean          3.066     3.067     3.066

libcent 0        89.3    -180.0      78.2
libamp  0        57.6    -180.0      20.7
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       195.0     130.7     320.4
kozaiamp        180.0     180.0       5.5