Orbit Fit and Astrometric record for 11QF99

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: 11QF99    
# Created Wed Oct 18 01:37:58 2017
# Orbit generated from Bernstein formalism
# Fitting   32 observations of   32
# Arc:   3.97y
# First observation: 2008/11/02
#  Last observation: 2012/10/21
Preliminary a, adot, b, bdot, g, gdot:
  -0.003776   0.067706   0.000634  -0.011794   0.056396   0.000000
# Chi-squared of fit:    12.34 DOF:   58 RMS:  0.11
# Min/Max residuals:    -0.23    0.23
# Exact a, adot, b, bdot, g, gdot:
  2.046668E-05  6.368268E-02 -2.986523E-06 -1.110635E-02  5.008625E-02 -1.101824E-02
# Covariance matrix:
  4.8733E-13 -2.6471E-13 -1.2435E-14  2.4579E-14 -9.3526E-14 -5.1738E-13
 -2.6471E-13  3.0482E-13  2.2900E-14 -4.5352E-14  1.6105E-13  9.5441E-13
 -1.2435E-14  2.2900E-14  4.1171E-13 -1.2554E-13  1.5396E-14  8.2880E-14
  2.4579E-14 -4.5352E-14 -1.2554E-13  4.7958E-14 -2.9163E-14 -1.6387E-13
 -9.3526E-14  1.6105E-13  1.5396E-14 -2.9163E-14  2.7728E-13  6.1722E-13
 -5.1738E-13  9.5441E-13  8.2880E-14 -1.6387E-13  6.1722E-13  3.4493E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
    4.389200   18.908161   -0.364885    0.070790   -0.921749  2454772.856102
# Heliocentric elements and errors
Epoch:              2454770.5000  =  2008/10/31
Mean Anomaly:          246.32404 +/-     0.013
Argument of Peri:      287.36917 +/-     0.009
Long of Asc Node:      222.47068 +/-     0.000
Inclination:            10.81644 +/-     0.000
Eccentricity:         0.17511263 +/-    0.0000
Semi-Major Axis:     19.11025739 +/-    0.0006
Time of Perihelion: 2464405.7803 +/-       1.0
Perihelion:          15.76381005 +/-    0.0007
Aphelion:            22.45670473 +/-    0.0009
Period (y)               83.5426 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           19.59079379 +/-    0.0002
Ecliptic Y            7.09138948 +/-    0.0001
Ecliptic Z            1.52792295 +/-    0.0000
Ecliptic XDOT        -0.00164629 +/-    0.0000
Ecliptic YDOT         0.00311614 +/-    0.0000
Ecliptic ZDOT        -0.00065153 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   20.89070498 +/-    0.0002
Geocenter to KBO     19.96556044 +/-    0.0002
# Hcoef:  9.75

The following table shows the complete astrometric record for 11QF99. 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 (11QF99) followed by the observatory code and reference code for the source of the astrometry.

2008 11  02.355348 01 02 59.59   +11 27 47.5   22.5V 11QF99    645  C~1SLn      
2008 11  02.356177 01 02 59.59   +11 27 47.4   22.2V 11QF99    645  C~1SLn      
2008 11  02.358665 01 02 59.57   +11 27 47.3   23.6V 11QF99    645  C~1SLn      
2011 08  29.52378  01 57 34.729  +14 35 44.64  22.8r 11QF99    568  C~0qBd      
2011 08  29.56781  01 57 34.534  +14 35 43.67  22.9r 11QF99    568  C~0qBd      
2011 08  29.61470  01 57 34.343  +14 35 42.59  22.9r 11QF99    568  C~0qBd      
2011 09  05.55403  01 57 02.688  +14 32 44.42  22.6r 11QF99    568  C~0qBd      
2011 10  24.41192  01 50 39.869  +13 54 31.38  22.6r 11QF99    568  C~0qBd      
2011 10  24.43329  01 50 39.669  +13 54 30.16  22.6r 11QF99    568  C~0qBd      
2011 10  24.45467  01 50 39.467  +13 54 28.85  22.6r 11QF99    568  C~0qBd      
2011 10  24.47598  01 50 39.267  +13 54 27.68  22.6r 11QF99    568  C~0qBd      
2011 10  24.49734  01 50 39.070  +13 54 26.35  22.5r 11QF99    568  C~0qBd      
2011 10  24.51878  01 50 38.864  +13 54 25.16  22.6r 11QF99    568  C~0qBd      
2011 10  28.30888  01 50 03.916  +13 50 42.62  22.3r 11QF99    568  C~0qBd      
2011 10  28.48864  01 50 02.228  +13 50 32.00  22.5r 11QF99    568  C~0qBd      
2011 10  30.53322  01 49 43.457  +13 48 31.33  22.6r 11QF99    568  C~0qBd      
2011 10  31.51590  01 49 34.481  +13 47 33.30  22.4r 11QF99    568  C~0qBd      
2011 11  24.24514  01 46 15.827  +13 25 07.81  22.7r 11QF99    568  C~0qBd      
2011 11  26.46510  01 45 59.909  +13 23 13.04        11QF99    568  C~0qBd      
2012 01  25.25212  01 44 01.928  +12 58 28.59  22.9r 11QF99    568  C~0qBd      
2012 01  26.23689  01 44 05.667  +12 58 35.77        11QF99    568  C~0qBd      
2012 01  27.29405  01 44 09.873  +12 58 44.53  23.0r 11QF99    568  C~0qBd      
2012 02  15.25232  01 46 00.063  +13 04 42.69  22.9r 11QF99    568  C~0qBd      
2012 08  23.53769  02 13 55.018  +15 15 10.94  22.9r 11QF99    568  C~0qBd      
2012 08  24.57339  02 13 52.461  +15 14 55.28  22.8r 11QF99    568  C~0qBd      
2012 10  17.40813  02 07 59.975  +14 40 38.36  22.6r 11QF99    568  C~0qBe      
2012 10  17.42550  02 07 59.808  +14 40 37.37  22.6r 11QF99    568  C~0qBe      
2012 10  20.46016  02 07 31.588  +14 37 48.92  22.4r 11QF99    568  C~0qBe      
2012 10  20.50496  02 07 31.159  +14 37 46.43  22.6r 11QF99    568  C~0qBe      
2012 10  21.31465  02 07 23.618  +14 37 01.02  22.6r 11QF99    568  C~0qBe      
2012 10  21.34035  02 07 23.375  +14 36 59.61  22.6r 11QF99    568  C~0qBe      
2012 10  21.36603  02 07 23.133  +14 36 58.12  22.6r 11QF99    568  C~0qBe      

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    -0.07       0.00    -0.11
  2   0.0000     -0.04    -0.00      -0.09    -0.19
  3   0.0000     -0.35     0.01      -0.07    -0.14
  4   2.8204  49644.79     0.20   -6834.23     0.02
  5   2.8206  49641.62     0.03   -6834.18     0.08
  6   2.8207  49638.47     0.08   -6834.27     0.03
  7   2.8397  49117.36    -0.02   -6847.20    -0.10
  8   2.9735  42802.57    -0.07   -7109.69     0.14
  9   2.9735  42799.28    -0.04   -7109.84     0.16
 10   2.9736  42795.93    -0.06   -7110.06     0.11
 11   2.9736  42792.66    -0.02   -7110.15     0.18
 12   2.9737  42789.37     0.01   -7110.42     0.09
 13   2.9738  42786.00    -0.03   -7110.50     0.18
 14   2.9841  42207.95     0.09   -7144.61     0.23
 15   2.9846  42180.08     0.05   -7146.12     0.21
 16   2.9902  41869.41     0.00   -7165.34     0.12
 17   2.9929  41720.78    -0.04   -7174.81     0.05
 18   3.0579  38417.24    -0.08   -7435.41     0.08
 19   3.0640  38150.65    -0.09   -7462.32     0.19
 20   3.2276  35951.55     0.17   -8262.09    -0.15
 21   3.2303  36006.99     0.14   -8274.80    -0.03
 22   3.2332  36069.62     0.01   -8288.45     0.01
 23   3.2851  37758.52    -0.05   -8522.34     0.12
 24   3.8061  64975.68     0.01   -9389.67    -0.07
 25   3.8089  64931.63    -0.12   -9392.68    -0.08
 26   3.9563  58934.58     0.05   -9681.94    -0.09
 27   3.9564  58931.75    -0.01   -9682.08    -0.11
 28   3.9647  58453.65    -0.00   -9706.93    -0.19
 29   3.9648  58446.41    -0.03   -9707.23    -0.16
 30   3.9670  58318.59    -0.06   -9714.21    -0.17
 31   3.9671  58314.49    -0.03   -9714.38    -0.16
 32   3.9672  58310.38    -0.01   -9714.64    -0.23

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.

11QF99    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        19.180    19.182    19.179
ecceobj         0.173     0.173     0.173
incobj         10.788    10.788    10.788
qmin           13.633    12.243    13.448
qmax           25.606    25.500    25.273
amean          19.234    19.187    19.180
amin           18.710    18.163    18.746
amax           19.721    19.508    19.650
emean           0.133     0.219     0.190
emin            0.009     0.172     0.088
emax            0.299     0.340     0.301
imean          10.770    11.259    12.080
imin            7.004     9.802     7.235
imax           13.021    11.741    16.838
excite_mean     0.234     0.295     0.285
fracstop        0.196     0.065     0.177
cjmean          3.120     3.096     3.101

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       182.0     178.8     187.2
kozaiamp        179.9     179.2     179.6