Orbit Fit and Astrometric record for 17SE277

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: 17SE277   
# Created Sat Dec  4 02:14:01 2021
# Orbit generated from Bernstein formalism
# Fitting      8 observations of      8
# Arc:   4.98y
# First observation: 2013/09/23
#  Last observation: 2018/09/15
Preliminary a, adot, b, bdot, g, gdot:
  -0.000533   0.028312  -0.000052   0.007089   0.025999   0.000000
# Chi-squared of fit:     1.45 DOF:     10 RMS:  0.08
# Min/Max residuals:    -0.14    0.18
# Exact a, adot, b, bdot, g, gdot:
  1.788904E-05  2.749913E-02  4.763323E-06  6.930669E-03  2.412679E-02 -5.839323E-03
# Covariance matrix:
  1.2110E-12 -8.0548E-13  4.1054E-14 -1.2574E-13 -1.1107E-12 -4.2201E-12
 -8.0548E-13  1.0814E-12 -9.1477E-14  2.3136E-13  1.3391E-12  7.3175E-12
  4.1054E-14 -9.1477E-14  8.7735E-13 -2.4544E-13  2.5134E-13 -7.1442E-13
 -1.2574E-13  2.3136E-13 -2.4544E-13  1.2814E-13  2.7174E-14  1.7104E-12
 -1.1107E-12  1.3391E-12  2.5134E-13  2.7174E-14  1.1741E-11  8.2146E-12
 -4.2201E-12  7.3175E-12 -7.1442E-13  1.7104E-12  8.2146E-12  5.3028E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
  -27.445979  -60.884919   -0.883288   -0.219478   -0.422771  2456559.498458
# Heliocentric elements and errors
Epoch:              2456550.5000  =  2013/09/15
Mean Anomaly:          352.37448 +/-     0.019
Argument of Peri:      326.31700 +/-     0.037
Long of Asc Node:        0.42837 +/-     0.001
Inclination:            30.63379 +/-     0.000
Eccentricity:         0.54499413 +/-    0.0006
Semi-Major Axis:     87.72991376 +/-    0.1338
Time of Perihelion: 2462908.0060 +/-       7.1
Perihelion:          39.91762545 +/-    0.0829
Aphelion:           135.54220206 +/-    0.2143
Period (y)              821.7312 +/-      1.88
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           18.90089940 +/-    0.0026
Ecliptic Y          -32.11853811 +/-    0.0046
Ecliptic Z          -19.10357770 +/-    0.0027
Ecliptic XDOT         0.00261032 +/-    0.0000
Ecliptic YDOT         0.00171412 +/-    0.0000
Ecliptic ZDOT         0.00100351 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.87828995 +/-    0.0039
Geocenter to KBO     41.44769969 +/-    0.0059
# Hcoef:  7.52

The following table shows the complete astrometric record for 17SE277. 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 (17SE277) followed by the observatory code and reference code for the source of the astrometry.

2013 09  23.99768  20 37 06.414  -46 59 37.69  23.5i 17SE277   W84  C~52co      
2014 09  12.05921  20 46 02.580  -46 13 38.68  23.9r 17SE277   W84  C~52co      
2016 09  22.00821  21 01 01.070  -44 19 20.88  23.2r 17SE277   W84  C~52co      
2017 09  27.00105  21 08 18.575  -43 18 32.31  23.2z 17SE277   W84  C~52co      
2017 09  27.00243  21 08 18.555  -43 18 32.27  24.0i 17SE277   W84  C~52co      
2017 10  13.06273  21 07 33.900  -43 10 11.78  24.7g 17SE277   W84  C~52co      
2017 10  30.04464  21 07 20.502  -42 58 32.55  23.1z 17SE277   W84  C~52co      
2018 09  15.22772  21 16 36.088  -42 21 10.49  23.8r 17SE277   W84  C~52co      

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     0.03       0.00    -0.05
     2   0.9666   6096.83    -0.02     991.55     0.06
     3   2.9952  17362.39    -0.14    4310.92    -0.07
     4   4.0082  23161.79     0.18    5996.79    -0.04
     5   4.0082  23161.60     0.03    5996.91     0.03
     6   4.0522  22893.80     0.00    6647.70     0.12
     7   4.0987  23020.83     0.00    7356.70     0.01
     8   4.9753  29649.64    -0.08    7078.87    -0.07

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.

17SE277    quality flag:2

Type:       SCATNEAR  SCATNEAR   5:1EEEE
Type:                            5:1EEII
Type:                            5:1IIII

axisobj        88.256    88.631    87.883
ecceobj         0.548     0.550     0.547
incobj         30.621    30.621    30.621
qmin           37.336    38.151    37.855
qmax          142.654   142.410   140.983
amean          88.195    88.807    88.040
amin           86.517    87.479    86.623
amax           90.460    90.767    90.013
emean           0.552     0.553     0.554
emin            0.531     0.537     0.539
emax            0.577     0.570     0.570
imean          30.663    30.844    30.506
imin           29.417    30.121    29.613
imax           31.769    31.674    31.377
excite_mean     0.752     0.754     0.751
fracstop        1.000     1.000     1.000
cjmean          2.795     2.796     2.795

libcent 0      -180.0    -180.0     284.6
libamp  0      -180.0    -180.0      36.3
libcent 1      -180.0    -180.0     222.0
libamp  1      -180.0    -180.0      39.4
libcent 2      -180.0    -180.0     159.2
libamp  2      -180.0    -180.0      43.8
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       131.6     122.0     328.7
kozaiamp        180.0     180.0       3.6