Orbit Fit and Astrometric record for MA66933

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: MA66933   
# Created Tue Oct 17 01:38:46 2017
# Orbit generated from Bernstein formalism
# Fitting   10 observations of   10
# Arc:   1.07y
# First observation: 2015/02/18
#  Last observation: 2016/03/13
Preliminary a, adot, b, bdot, g, gdot:
  -0.000002   0.030214   0.000008  -0.015865   0.027353   0.000000
# Chi-squared of fit:     9.05 DOF:   14 RMS:  0.17
# Min/Max residuals:    -0.34    0.24
# Exact a, adot, b, bdot, g, gdot:
  1.729110E-05  3.027745E-02 -9.168937E-06 -1.585550E-02  2.755987E-02 -6.273644E-03
# Covariance matrix:
  4.8566E-13  1.5622E-13  1.1234E-14 -1.6448E-13  1.2927E-12  9.1169E-12
  1.5622E-13  2.5828E-10  8.2405E-12 -1.7788E-10  7.3423E-11  1.0069E-08
  1.1234E-14  8.2405E-12  4.6995E-13 -5.9223E-12  2.3463E-12  3.2238E-10
 -1.6448E-13 -1.7788E-10 -5.9223E-12  1.2386E-10 -5.0318E-11 -6.9607E-09
  1.2927E-12  7.3423E-11  2.3463E-12 -5.0318E-11  2.5965E-11  2.8473E-09
  9.1169E-12  1.0069E-08  3.2238E-10 -6.9607E-09  2.8473E-09  3.9399E-07
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.906552  122.555698   -0.437113    0.014125   -0.883029  2457071.660548
# Heliocentric elements and errors
Epoch:              2457070.5000  =  2015/02/17
Mean Anomaly:          352.07256 +/-     0.660
Argument of Peri:      206.93196 +/-     2.583
Long of Asc Node:      304.92874 +/-     0.001
Inclination:            27.56151 +/-     0.010
Eccentricity:         0.52312765 +/-    0.0126
Semi-Major Axis:     74.62904855 +/-    1.3467
Time of Perihelion: 2462256.0022 +/-     408.1
Perihelion:          35.58852975 +/-    1.1375
Aphelion:           113.66956735 +/-    2.2558
Period (y)              644.7184 +/-     17.45
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -20.37024275 +/-    0.0036
Ecliptic Y           31.08878211 +/-    0.0057
Ecliptic Z            0.57374047 +/-    0.0001
Ecliptic XDOT        -0.00221692 +/-    0.0000
Ecliptic YDOT        -0.00212838 +/-    0.0001
Ecliptic ZDOT        -0.00158469 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.17241370 +/-    0.0051
Geocenter to KBO     36.28464674 +/-    0.0067
# Hcoef:  7.18

The following table shows the complete astrometric record for MA66933. 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 (MA66933) followed by the observatory code and reference code for the source of the astrometry.

2015 02  18.15977  08 20 12.553  +20 28 18.86  22.5R MA66933   695              
2015 02  18.20668  08 20 12.314  +20 28 19.25        MA66933   695              
2015 02  18.25255  08 20 12.063  +20 28 19.33        MA66933   695              
2015 03  16.13648  08 18 22.441  +20 29 57.05  22.5R MA66933   G37              
2015 03  16.20489  08 18 22.213  +20 29 56.74        MA66933   G37              
2015 03  23.14108  08 18 02.771  +20 29 48.78  22.7R MA66933   695              
2015 03  23.20667  08 18 02.608  +20 29 48.63        MA66933   695              
2015 03  23.26825  08 18 02.451  +20 29 48.45        MA66933   695              
2016 03  13.14698  08 24 46.986  +19 12 52.92  22.7R MA66933   G37              
2016 03  13.18670  08 24 46.849  +19 12 53.52        MA66933   G37              

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     0.02       0.00     0.01
  2   0.0001     -3.36     0.09      -0.39     0.08
  3   0.0003     -6.81     0.00      -1.12    -0.19
  4   0.0711  -1529.12    -0.33    -255.78     0.13
  5   0.0713  -1532.18    -0.34    -256.81    -0.19
  6   0.0903  -1796.53     0.16    -326.17     0.05
  7   0.0905  -1798.73     0.21    -326.83     0.07
  8   0.0906  -1800.83     0.20    -327.50     0.04
  9   1.0650   4817.02     0.02   -3506.03    -0.25
 10   1.0651   4814.99    -0.03   -3505.91     0.24

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.

MA66933    quality flag:2

Type:       SCATNEAR  SCATNEAR11:3EEEEEE

axisobj        74.034    77.255    72.061
ecceobj         0.518     0.548     0.496
incobj         27.608    27.578    27.637
qmin           33.448    33.070    35.402
qmax          115.917   124.209   109.830
amean          73.497    77.082    71.594
amin           72.288    75.868    70.562
amax           75.236    79.030    73.022
emean           0.525     0.553     0.493
emin            0.504     0.532     0.483
emax            0.544     0.572     0.505
imean          28.420    28.677    29.154
imin           27.456    27.860    28.852
imax           29.507    29.834    29.434
excite_mean     0.708     0.732     0.693
fracstop        1.000     1.000     1.000
cjmean          2.749     2.729     2.763

libcent 0      -180.0    -180.0     180.7
libamp  0      -180.0    -180.0     153.8
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       188.3     184.0     231.8
kozaiamp        180.0     180.0     180.0