Orbit Fit and Astrometric record for 15FA490

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: 15FA490   
# Created Tue Apr  1 01:10:22 2025
# Orbit generated from Bernstein formalism
# Fitting     24 observations of     25
# Arc:   1.01y
# First observation: 2014/03/25
#  Last observation: 2015/03/29
Preliminary a, adot, b, bdot, g, gdot:
  -0.000018   0.038739  -0.000002   0.011680   0.029307   0.000000
# Chi-squared of fit:     7.80 DOF:     42 RMS:  0.10
# Min/Max residuals:    -0.25    0.17
# Exact a, adot, b, bdot, g, gdot:
  1.903105E-05  3.859316E-02  2.977931E-06  1.163759E-02  2.983440E-02 -2.972133E-03
# Covariance matrix:
  4.0032E-13  1.6784E-11 -6.4188E-14  5.2616E-12  1.0406E-11  4.4382E-10
  1.6784E-11  1.4884E-09 -5.3803E-12  4.6090E-10  8.4325E-10  3.8893E-08
 -6.4188E-14 -5.3803E-12  2.0496E-13 -1.8524E-12 -3.1521E-12 -1.4066E-10
  5.2616E-12  4.6090E-10 -1.8524E-12  1.4302E-10  2.6138E-10  1.2046E-08
  1.0406E-11  8.4325E-10 -3.1521E-12  2.6138E-10  5.0665E-10  2.2050E-08
  4.4382E-10  3.8893E-08 -1.4066E-10  1.2046E-08  2.2050E-08  1.0165E-06
#      lat0       lon0       xBary       yBary       zBary        JD0
   13.526442 -145.699448    0.491354    0.202722   -0.842358  2456742.057728
# Heliocentric elements and errors
Epoch:              2456740.5000  =  2014/03/24
Mean Anomaly:          357.31527 +/-     0.731
Argument of Peri:       52.14801 +/-     3.715
Long of Asc Node:      176.64097 +/-     0.005
Inclination:            21.35674 +/-     0.002
Eccentricity:         0.60067853 +/-    0.0083
Semi-Major Axis:     85.18440643 +/-    1.3476
Time of Perihelion: 2458882.0929 +/-     580.9
Perihelion:          34.01596206 +/-    0.8891
Aphelion:           136.35285079 +/-    2.2703
Period (y)              786.2277 +/-     18.66
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -27.91495218 +/-    0.0203
Ecliptic Y          -18.44561172 +/-    0.0138
Ecliptic Z            7.83986858 +/-    0.0059
Ecliptic XDOT         0.00241564 +/-    0.0001
Ecliptic YDOT        -0.00263868 +/-    0.0001
Ecliptic ZDOT         0.00097467 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   34.36493396 +/-    0.0182
Geocenter to KBO     33.51835076 +/-    0.0253
# Hcoef:  8.67

The following table shows the complete astrometric record for 15FA490. 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 (15FA490) followed by the observatory code and reference code for the source of the astrometry.

2014 03  25.55695  14 26 15.56   -00 11 30.9   24.3y 15FA490   T09  C~8eRg      
2014 03  25.58356  14 26 15.41   -00 11 30.4   23.7y 15FA490   T09  C~8eRg      
2014 03  25.61968  14 26 15.27   -00 11 28.9   23.6y 15FA490   T09  C~8eRg      
2014 03  25.63197  14 26 15.22   -00 11 28.6   23.3y 15FA490   T09  C~8eRg      
2014 03  28.52423  14 26 03.49   -00 09 29.8   23.9i 15FA490   T09  C~8eRg      
2014 03  28.54478  14 26 03.42   -00 09 29.0   23.6i 15FA490   T09  C~8eRg      
2014 03  28.55746  14 26 03.35   -00 09 28.5   23.7i 15FA490   T09  C~8eRg      
2014 03  28.57833  14 26 03.27   -00 09 27.8   23.7i 15FA490   T09  C~8eRg      
2014 03  28.59923  14 26 03.18   -00 09 26.8   23.8i 15FA490   T09  C~8eRg      
2015 03  20.58324  14 35 49.98   -00 20 58.4   24.0i 15FA490   T09  C~8eRg      
2015 03  20.61088  14 35 49.89   -00 20 57.4   23.7i 15FA490   T09  C~8eRg      
2015 03  20.62757  14 35 49.83   -00 20 56.7   23.9i 15FA490   T09  C~8eRg      
2015 03  20.64485  14 35 49.77   -00 20 56.0   23.8i 15FA490   T09  C~8eRg      
2015 03  25.63968  14 35 31.68   -00 17 31.1   25.1g 15FA490   T09  C~8eRg      
2015 03  25.64187  14 35 31.68   -00 17 31.1   24.6g 15FA490   T09  C~8eRg      
2015 03  25.64403  14 35 31.66   -00 17 30.7   25.0g 15FA490   T09  C~8eRg      
2015 03  29.43882  14 35 16.75   -00 14 55.7   23.7y 15FA490   T09  C~8eRg      
2015 03  29.44968  14 35 16.68   -00 14 55.2   23.6y 15FA490   T09  C~8eRg      
2015 03  29.48264  14 35 16.56   -00 14 53.7   23.8y 15FA490   T09  C~8eRg      
2015 03  29.54880  14 35 16.28   -00 14 51.1   23.7z 15FA490   T09  C~8eRg      
2015 03  29.56398  14 35 16.23   -00 14 50.5   24.0z 15FA490   T09  C~8eRg      
2015 03  29.57939  14 35 16.16   -00 14 50.0   23.4z 15FA490   T09  C~8eRg      
2015 03  29.59297  14 35 16.09   -00 14 49.5   23.7z 15FA490   T09  C~8eRg      
2015 03  29.60669  14 35 16.04   -00 14 48.8   23.7z 15FA490   T09  C~8eRg      
2015 03  29.62041  14 35 15.98   -00 14 48.3   24.0z 15FA490   T09  C~8eRg      

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 (   0.29)      0.00 (   0.66)
     2   0.0001     -2.29    -0.11      -0.27    -0.11
     3   0.0002     -4.77    -0.02       0.46    -0.06
     4   0.0002     -5.57     0.04       0.50    -0.25
     5   0.0081   -210.79    -0.11      54.88     0.12
     6   0.0082   -212.04     0.15      55.29     0.17
     7   0.0082   -213.20    -0.08      55.42     0.07
     8   0.0083   -214.56     0.10      55.69    -0.03
     9   0.0083   -216.17     0.03      56.19     0.10
    10   0.9857   8329.28    -0.09    2295.92     0.04
    11   0.9858   8327.68     0.06    2296.42    -0.05
    12   0.9858   8326.59     0.03    2296.79    -0.04
    13   0.9859   8325.51     0.05    2297.15    -0.05
    14   0.9995   8001.42    -0.04    2401.59    -0.03
    15   0.9995   8001.42     0.11    2401.59    -0.08
    16   0.9996   8001.00    -0.16    2401.87     0.16
    17   1.0099   7738.47     0.16    2474.82     0.01
    18   1.0100   7737.31    -0.22    2474.95    -0.06
    19   1.0101   7735.12    -0.02    2475.77     0.17
    20   1.0102   7730.29    -0.04    2476.85     0.06
    21   1.0103   7729.38     0.15    2477.17     0.11
    22   1.0103   7728.22     0.11    2477.30    -0.04
    23   1.0104   7727.07    -0.06    2477.42    -0.16
    24   1.0104   7726.13    -0.00    2477.84     0.01
    25   1.0104   7725.11    -0.02    2478.01    -0.06

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.

15FA490    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        83.895    86.256    83.284
ecceobj         0.595     0.612     0.591
incobj         21.415    21.410    21.417
qmin           32.669    32.321    32.634
qmax          141.321   147.924   143.770
amean          85.110    88.044    85.451
amin           83.349    86.079    83.284
amax           87.455    90.713    89.172
emean           0.599     0.618     0.601
emin            0.580     0.602     0.587
emax            0.618     0.633     0.618
imean          21.020    20.994    20.842
imin           19.660    20.092    19.642
imax           22.337    22.036    22.212
excite_mean     0.698     0.715     0.699
fracstop        1.000     1.000     1.000
cjmean          2.867     2.851     2.868

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       153.0     195.8     199.4
kozaiamp        121.0     133.4     180.0