Orbit Fit and Astrometric record for 14TW85

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: 14TW85    
# Created Sat Dec 16 02:38:05 2017
# Orbit generated from Bernstein formalism
# Fitting   29 observations of   29
# Arc:   4.22y
# First observation: 2010/11/03
#  Last observation: 2015/01/22
Preliminary a, adot, b, bdot, g, gdot:
   0.000122   0.023315   0.000003   0.000153   0.024682   0.000000
# Chi-squared of fit:    14.04 DOF:   52 RMS:  0.12
# Min/Max residuals:    -0.26    0.27
# Exact a, adot, b, bdot, g, gdot:
  1.513586E-05  2.339885E-02  1.719197E-07  1.563290E-04  2.411596E-02  3.066250E-04
# Covariance matrix:
  4.7906E-13 -3.5443E-13  1.5106E-15 -1.9530E-15 -2.0901E-13 -2.5347E-12
 -3.5443E-13  4.3986E-13 -2.3098E-15  2.9861E-15  3.1307E-13  3.8653E-12
  1.5106E-15 -2.3098E-15  3.0134E-13 -8.3991E-14 -1.3057E-15 -2.2304E-14
 -1.9530E-15  2.9861E-15 -8.3991E-14  2.8188E-14  1.6932E-15  2.8829E-14
 -2.0901E-13  3.1307E-13 -1.3057E-15  1.6932E-15  4.5830E-13  2.6372E-12
 -2.5347E-12  3.8653E-12 -2.2304E-14  2.8829E-14  2.6372E-12  3.6705E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.882592   40.425481   -0.009299   -0.015244   -0.989452  2455503.949176
# Heliocentric elements and errors
Epoch:              2455500.5000  =  2010/10/31
Mean Anomaly:           40.81458 +/-     0.479
Argument of Peri:      251.44194 +/-     0.510
Long of Asc Node:      106.46862 +/-     0.022
Inclination:             0.94329 +/-     0.000
Eccentricity:         0.02214296 +/-    0.0002
Semi-Major Axis:     43.17236388 +/-    0.0036
Time of Perihelion: 2443753.6895 +/-     137.7
Perihelion:          42.21639988 +/-    0.0086
Aphelion:            44.12832788 +/-    0.0087
Period (y)              283.6723 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           32.31356353 +/-    0.0009
Ecliptic Y           27.53416988 +/-    0.0008
Ecliptic Z           -0.63873528 +/-    0.0000
Ecliptic XDOT        -0.00169606 +/-    0.0000
Ecliptic YDOT         0.00205130 +/-    0.0000
Ecliptic ZDOT         0.00001721 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.45827224 +/-    0.0008
Geocenter to KBO     41.46631523 +/-    0.0012
# Hcoef:  5.92

The following table shows the complete astrometric record for 14TW85. 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 (14TW85) followed by the observatory code and reference code for the source of the astrometry.

2010 11  03.44841  02 33 10.642  +14 06 34.86  22.1w 14TW85    F51  C~1vXk      
2010 11  03.47391  02 33 10.522  +14 06 34.36  22.0w 14TW85    F51  C~1vXk      
2010 11  03.48655  02 33 10.448  +14 06 34.05  22.0w 14TW85    F51  C~1vXk      
2012 10  18.38996  02 44 56.131  +15 02 37.32  22.3w 14TW85    F51  C~1vXk      
2012 10  18.40512  02 44 56.049  +15 02 36.82  22.2w 14TW85    F51  C~1vXk      
2012 10  18.42029  02 44 55.974  +15 02 36.66  22.1w 14TW85    F51  C~1vXk      
2012 10  18.43558  02 44 55.904  +15 02 36.37  21.8w 14TW85    F51  C~1vXk      
2012 12  07.23645  02 41 08.033  +14 45 26.59  22.3w 14TW85    F51  C~1vXk      
2012 12  07.25146  02 41 07.960  +14 45 26.23  22.7w 14TW85    F51  C~1vXk      
2012 12  07.26642  02 41 07.900  +14 45 26.05  22.4w 14TW85    F51  C~1vXk      
2012 12  07.28150  02 41 07.852  +14 45 25.96  22.2w 14TW85    F51  C~1vXk      
2013 11  24.30739  02 47 20.369  +15 14 11.51  22.2w 14TW85    F51  C~1vXk      
2013 11  24.32069  02 47 20.312  +15 14 11.30  22.2w 14TW85    F51  C~1vXk      
2013 11  24.33403  02 47 20.246  +15 14 11.16  22.2w 14TW85    F51  C~1vXk      
2014 10  02.39764  02 56 39.172  +15 55 51.13  21.7i 14TW85    F51  C~1vXk      
2014 10  02.40986  02 56 39.128  +15 55 51.12  21.8i 14TW85    F51  C~1vXk      
2014 10  02.43424  02 56 39.034  +15 55 50.49  21.8i 14TW85    F51  C~1vXk      
2014 11  21.42436  02 52 52.380  +15 39 21.37  22.1w 14TW85    F51  C~1vXk      
2014 11  21.43591  02 52 52.359  +15 39 20.87  22.2w 14TW85    F51  C~1vXk      
2014 11  21.44763  02 52 52.285  +15 39 20.78  22.2w 14TW85    F51  C~1vXk      
2014 11  21.45925  02 52 52.229  +15 39 20.61  22.2w 14TW85    F51  C~1vXk      
2014 12  13.34976  02 51 18.342  +15 32 42.85  22.0w 14TW85    F51  C~1vXk      
2014 12  13.36267  02 51 18.294  +15 32 42.64  22.1w 14TW85    F51  C~1vXk      
2014 12  13.37561  02 51 18.253  +15 32 42.53  22.3w 14TW85    F51  C~1vXk      
2014 12  13.38860  02 51 18.191  +15 32 42.39  22.2w 14TW85    F51  C~1vXk      
2015 01  22.23756  02 49 49.286  +15 26 55.59  22.1w 14TW85    F51  C~1vXk      
2015 01  22.25296  02 49 49.292  +15 26 55.64  22.3w 14TW85    F51  C~1vXk      
2015 01  22.26836  02 49 49.276  +15 26 55.50  22.4w 14TW85    F51  C~1vXk      
2015 01  22.28382  02 49 49.269  +15 26 55.78  22.2w 14TW85    F51  C~1vXk      

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    -0.01
  2   0.0001     -1.81     0.12       0.07     0.04
  3   0.0001     -2.93    -0.06       0.11     0.08
  4   1.9574  10788.98     0.19      65.55    -0.03
  5   1.9574  10787.69    -0.04      65.43    -0.15
  6   1.9575  10786.60    -0.06      65.60     0.02
  7   1.9575  10785.55    -0.05      65.63     0.04
  8   2.0939   7318.91    -0.03      81.37    -0.13
  9   2.0939   7317.79    -0.25      81.35    -0.18
 10   2.0940   7316.91    -0.23      81.44    -0.10
 11   2.0940   7316.22    -0.01      81.57     0.00
 12   3.0578  12996.79     0.14     104.48     0.10
 13   3.0578  12995.94     0.22     104.53     0.13
 14   3.0579  12994.98     0.20     104.68     0.27
 15   3.9122  21508.93    -0.08     136.68     0.05
 16   3.9123  21508.31    -0.01     136.85     0.23
 17   3.9124  21506.81    -0.12     136.63     0.01
 18   4.0492  18057.58    -0.22     135.17     0.15
 19   4.0492  18057.14     0.17     134.78    -0.26
 20   4.0493  18056.09    -0.03     135.01    -0.04
 21   4.0493  18055.26    -0.02     135.08     0.03
 22   4.1092  16631.80     0.03     150.82    -0.04
 23   4.1093  16631.07     0.05     150.82    -0.06
 24   4.1093  16630.47     0.20     150.89    -0.00
 25   4.1094  16629.57     0.05     151.02     0.11
 26   4.2185  15291.33    -0.17     197.10    -0.09
 27   4.2185  15291.43     0.05     197.13    -0.09
 28   4.2185  15291.16    -0.09     197.06    -0.18
 29   4.2186  15291.15     0.02     197.36     0.09

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.

14TW85    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.320    43.331    43.309
ecceobj         0.025     0.025     0.024
incobj          0.943     0.943     0.943
qmin           41.072    41.057    41.063
qmax           45.104    45.126    45.078
amean          42.997    43.008    42.987
amin           42.674    42.675    42.663
amax           43.334    43.341    43.324
emean           0.025     0.025     0.025
emin            0.004     0.003     0.004
emax            0.041     0.041     0.041
imean           1.473     1.466     1.480
imin            0.278     0.278     0.278
imax            2.092     2.085     2.100
excite_mean     0.036     0.036     0.036
fracstop        1.000     1.000     1.000
cjmean          3.088     3.088     3.088

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       190.5     190.5     190.7
kozaiamp        180.0     179.9     179.9