Orbit Fit and Astrometric record for 15RX280

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: 15RX280   
# Created Wed Feb 20 02:10:37 2019
# Orbit generated from Bernstein formalism
# Fitting   30 observations of   30
# Arc:   2.42y
# First observation: 2015/06/23
#  Last observation: 2017/11/22
Preliminary a, adot, b, bdot, g, gdot:
  -0.000083   0.016258  -0.000014  -0.006666   0.020697   0.000000
# Chi-squared of fit:     6.42 DOF:   54 RMS:  0.08
# Min/Max residuals:    -0.28    0.30
# Exact a, adot, b, bdot, g, gdot:
  1.222685E-05  1.593778E-02 -4.769719E-06 -6.615397E-03  2.043218E-02  1.647533E-03
# Covariance matrix:
  1.9683E-13  4.2299E-14  1.3597E-14 -9.3401E-14  2.2838E-13  7.8438E-12
  4.2299E-14  2.7360E-13  1.3064E-14 -1.0114E-13  2.9149E-13  8.5383E-12
  1.3597E-14  1.3064E-14  1.1082E-13 -1.1513E-13  4.0180E-14  2.9816E-12
 -9.3401E-14 -1.0114E-13 -1.1513E-13  3.0411E-13 -2.5934E-13 -1.5994E-11
  2.2838E-13  2.9149E-13  4.0180E-14 -2.5934E-13  5.6955E-13  2.1714E-11
  7.8438E-12  8.5383E-12  2.9816E-12 -1.5994E-11  2.1714E-11  1.3255E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.503220    9.650105    1.006627   -0.006029    0.139985  2457197.020648
# Heliocentric elements and errors
Epoch:              2457190.5000  =  2015/06/17
Mean Anomaly:          142.72710 +/-     0.697
Argument of Peri:       22.41910 +/-     0.689
Long of Asc Node:      194.50268 +/-     0.000
Inclination:            22.63467 +/-     0.001
Eccentricity:         0.13640725 +/-    0.0009
Semi-Major Axis:     43.79851099 +/-    0.0112
Time of Perihelion: 2415215.4329 +/-     204.3
Perihelion:          37.82407645 +/-    0.0394
Aphelion:            49.77294553 +/-    0.0402
Period (y)              289.8660 +/-      0.11
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           48.23092193 +/-    0.0018
Ecliptic Y            7.18099958 +/-    0.0003
Ecliptic Z            2.13741357 +/-    0.0001
Ecliptic XDOT        -0.00010486 +/-    0.0000
Ecliptic YDOT         0.00214262 +/-    0.0000
Ecliptic ZDOT        -0.00087589 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   48.80939583 +/-    0.0018
Geocenter to KBO     48.94239910 +/-    0.0018
# Hcoef:  7.34

The following table shows the complete astrometric record for 15RX280. 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 (15RX280) followed by the observatory code and reference code for the source of the astrometry.

2015 06  23.51987  00 31 30.672  +06 07 27.87  24.3r 15RX280   568  C~2nvr      
2015 07  14.61234  00 31 39.668  +06 08 10.85  24.1r 15RX280   568  C~2nvr      
2015 08  13.47989  00 30 58.098  +06 03 12.17  23.4r 15RX280   568  C~2nvr      
2015 08  13.50863  00 30 58.040  +06 03 11.76  24.0r 15RX280   568  C~2nvr      
2015 08  13.51279  00 30 58.012  +06 03 11.60  24.3r 15RX280   568  C~2nvr      
2015 08  13.53335  00 30 57.959  +06 03 11.47  24.6r 15RX280   568  C~2nvr      
2015 08  20.41706  00 30 40.382  +06 01 07.11  24.2r 15RX280   568  C~2nvr      
2015 09  07.56274  00 29 43.191  +05 54 19.33  24.2w 15RX280   568  C~2nvr      
2015 09  09.39169  00 29 36.742  +05 53 32.84  24.0r 15RX280   568  C~2nvr      
2015 09  09.43322  00 29 36.587  +05 53 31.78  24.1r 15RX280   568  C~2nvs      
2015 09  09.47414  00 29 36.443  +05 53 30.72  24.2r 15RX280   568  C~2nvs      
2015 09  10.49775  00 29 32.777  +05 53 04.29  24.2w 15RX280   568  C~2nvs      
2015 09  18.45683  00 29 03.369  +05 49 30.88  24.1w 15RX280   568  C~2nvs      
2015 10  08.34456  00 27 46.539  +05 39 58.66  24.1w 15RX280   568  C~2nvs      
2015 10  08.39721  00 27 46.329  +05 39 57.19  24.2w 15RX280   568  C~2nvs      
2015 10  09.31421  00 27 42.802  +05 39 30.18  24.2w 15RX280   568  C~2nvs      
2015 11  10.43997  00 25 52.646  +05 24 44.84  24.1w 15RX280   568  C~2nvs      
2015 12  08.23879  00 24 59.125  +05 15 51.42  24.4w 15RX280   568  C~2nvs      
2016 09  05.48640  00 33 50.689  +05 55 33.27  24.3w 15RX280   568  C~2nvs      
2016 09  06.44060  00 33 47.407  +05 55 09.40  24.4w 15RX280   568  C~2nvs      
2016 09  06.48188  00 33 47.266  +05 55 08.37  24.2w 15RX280   568  C~2nvs      
2016 09  26.43130  00 32 33.275  +05 46 07.84  24.2w 15RX280   568  C~2nvs      
2016 11  03.39147  00 30 13.749  +05 28 11.42  24.3w 15RX280   568  C~2nvs      
2016 11  03.45641  00 30 13.536  +05 28 09.71  24.2w 15RX280   568  C~2nvs      
2016 12  25.23477  00 28 52.899  +05 14 00.15  24.4w 15RX280   568  C~2nvs      
2016 12  25.25214  00 28 52.897  +05 14 00.14  24.5w 15RX280   568  C~2nvs      
2017 01  02.28151  00 28 58.102  +05 13 39.10        15RX280   568  C~2nvs      
2017 01  02.29442  00 28 58.104  +05 13 39.12  24.0w 15RX280   568  C~2nvs      
2017 01  30.22034  00 29 54.391  +05 16 37.59  25.3w 15RX280   568  C~2nvs      
2017 11  22.34219  00 33 24.833  +05 21 42.17  24.3w 15RX280   568  C~2nvs      

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    -0.07
  2   0.0577    140.24    -0.12     -13.42     0.04
  3   0.1395   -547.32     0.11     -43.28    -0.07
  4   0.1396   -548.28     0.30     -43.32    -0.07
  5   0.1396   -548.73     0.01     -43.30    -0.05
  6   0.1397   -549.51     0.06     -43.11     0.16
  7   0.1585   -839.50    -0.06     -53.89     0.03
  8   0.2082  -1784.45    -0.10     -91.53    -0.03
  9   0.2132  -1891.22    -0.03     -96.21     0.02
 10   0.2133  -1893.77    -0.08     -96.27     0.05
 11   0.2134  -1896.16    -0.02     -96.40     0.01
 12   0.2162  -1956.86    -0.01     -99.06     0.02
 13   0.2380  -2444.35    -0.04    -121.61     0.17
 14   0.2925  -3724.14    -0.02    -193.43    -0.01
 15   0.2926  -3727.60    -0.04    -193.54     0.08
 16   0.2951  -3786.66    -0.05    -197.50    -0.02
 17   0.3831  -5648.49     0.05    -358.62    -0.28
 18   0.4592  -6594.71     0.07    -531.15     0.03
 19   1.2046   1638.36    -0.01   -1479.61     0.10
 20   1.2072   1583.95    -0.07   -1482.29    -0.02
 21   1.2073   1581.61    -0.01   -1482.41    -0.05
 22   1.2619    353.81    -0.00   -1544.58     0.02
 23   1.3658  -1984.87     0.09   -1712.21    -0.04
 24   1.3660  -1988.46     0.01   -1712.52    -0.04
 25   1.5078  -3430.79     0.05   -2017.16    -0.07
 26   1.5078  -3430.82    -0.01   -2017.15     0.03
 27   1.5298  -3367.71     0.03   -2067.23    -0.06
 28   1.5298  -3367.67    -0.09   -2067.22     0.02
 29   1.6063  -2524.62    -0.12   -2235.55     0.11
 30   2.4170    484.19     0.08   -3195.17     0.01

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.

15RX280    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        44.157    44.193    44.124
ecceobj         0.129     0.131     0.127
incobj         22.510    22.510    22.509
qmin           37.014    36.943    37.034
qmax           51.211    51.417    51.176
amean          43.970    44.007    43.934
amin           43.602    43.646    43.565
amax           44.371    44.414    44.340
emean           0.140     0.143     0.138
emin            0.125     0.128     0.123
emax            0.155     0.158     0.154
imean          22.643    22.629    22.633
imin           22.197    22.195    22.192
imax           23.088    23.055    23.070
excite_mean     0.410     0.410     0.409
fracstop        1.000     1.000     1.000
cjmean          2.894     2.893     2.894

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       170.3     170.8     169.8
kozaiamp        179.9     179.9     179.9