Orbit Fit and Astrometric record for 15RX277

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: 15RX277   
# Created Wed Feb 20 02:10:35 2019
# Orbit generated from Bernstein formalism
# Fitting   24 observations of   24
# Arc:   2.19y
# First observation: 2015/07/14
#  Last observation: 2017/09/22
Preliminary a, adot, b, bdot, g, gdot:
  -0.000130   0.019049   0.000000   0.000011   0.021138   0.000000
# Chi-squared of fit:     4.94 DOF:   42 RMS:  0.08
# Min/Max residuals:    -0.16    0.20
# Exact a, adot, b, bdot, g, gdot:
  1.368317E-05  1.872339E-02  5.688328E-07  1.053454E-05  2.100678E-02 -3.539441E-03
# Covariance matrix:
  2.4030E-13 -1.7937E-14  7.6021E-17  2.0015E-17  1.7402E-13  3.2830E-12
 -1.7937E-14  3.5709E-13  7.9862E-17  1.1253E-16  2.4150E-13  1.1274E-11
  7.6021E-17  7.9862E-17  1.3683E-13 -1.0170E-13  1.3975E-16  3.4309E-15
  2.0015E-17  1.1253E-16 -1.0170E-13  1.3436E-13  9.6227E-17  5.9927E-15
  1.7402E-13  2.4150E-13  1.3975E-16  9.6227E-17  3.5803E-13  1.1118E-11
  3.2830E-12  1.1274E-11  3.4309E-15  5.9927E-15  1.1118E-11  5.8337E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.066538    8.946233    0.992233   -0.000163   -0.225680  2457218.038549
# Heliocentric elements and errors
Epoch:              2457210.5000  =  2015/07/07
Mean Anomaly:          279.92632 +/-     0.150
Argument of Peri:       40.09911 +/-     0.783
Long of Asc Node:       71.56200 +/-     0.780
Inclination:             0.07369 +/-     0.001
Eccentricity:         0.20787065 +/-    0.0012
Semi-Major Axis:     47.49948274 +/-    0.0244
Time of Perihelion: 2483806.6663 +/-      45.4
Perihelion:          37.62573437 +/-    0.0605
Aphelion:            57.37323111 +/-    0.0645
Period (y)              327.3720 +/-      0.25
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           47.39821602 +/-    0.0013
Ecliptic Y            6.45801958 +/-    0.0002
Ecliptic Z           -0.05520123 +/-    0.0000
Ecliptic XDOT        -0.00083745 +/-    0.0000
Ecliptic YDOT         0.00233255 +/-    0.0000
Ecliptic ZDOT         0.00000197 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   47.83617821 +/-    0.0013
Geocenter to KBO     47.60368852 +/-    0.0014
# Hcoef:  7.98

The following table shows the complete astrometric record for 15RX277. 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 (15RX277) followed by the observatory code and reference code for the source of the astrometry.

2015 07  14.53776  00 32 58.747  +03 29 06.95  25.5r 15RX277   568  C~2lVO      
2015 07  19.50263  00 32 56.104  +03 28 49.71  24.4r 15RX277   568  C~2lVO      
2015 09  08.39268  00 30 57.171  +03 16 03.59  24.8r 15RX277   568  C~2lVO      
2015 09  08.49686  00 30 56.800  +03 16 01.19  24.1r 15RX277   568  C~2lVO      
2015 09  08.54047  00 30 56.638  +03 16 00.22  24.6r 15RX277   568  C~2lVO      
2015 09  09.51600  00 30 53.106  +03 15 37.43  24.8w 15RX277   568  C~2lVO      
2015 09  10.45696  00 30 49.657  +03 15 15.35  24.6w 15RX277   568  C~2lVO      
2015 09  16.44258  00 30 27.207  +03 12 50.90  24.7w 15RX277   568  C~2lVO      
2015 10  03.36936  00 29 20.527  +03 05 42.24  24.7w 15RX277   568  C~2lVO      
2015 11  07.23400  00 27 13.025  +02 52 03.03  25.1w 15RX277   568  C~2lVO      
2015 11  07.28647  00 27 12.853  +02 52 02.04  25.1w 15RX277   568  C~2lVO      
2015 12  07.31039  00 26 08.627  +02 45 10.74  25.0w 15RX277   568  C~2lVO      
2016 01  01.23954  00 26 05.592  +02 44 53.57  25.2w 15RX277   568  C~2lVO      
2016 07  07.57912  00 36 56.334  +03 54 30.70  25.1w 15RX277   568  C~2lVO      
2016 07  08.55858  00 36 56.488  +03 54 31.80  24.9w 15RX277   568  C~2lVO      
2016 09  05.54486  00 35 05.204  +03 42 36.39  24.7w 15RX277   568  C~2lVO      
2016 09  07.48422  00 34 58.327  +03 41 52.30  24.8w 15RX277   568  C~2lVO      
2016 09  07.53054  00 34 58.147  +03 41 51.16  25.1w 15RX277   568  C~2lVO      
2016 09  26.54877  00 33 45.406  +03 34 04.99  24.6w 15RX277   568  C~2lVO      
2016 12  25.24114  00 29 56.758  +03 09 43.31  24.9w 15RX277   568  C~2lVO      
2017 01  02.28800  00 30 01.722  +03 10 15.91  24.3w 15RX277   568  C~2lVO      
2017 01  29.24345  00 30 55.274  +03 16 02.61  24.7w 15RX277   568  C~2lVO      
2017 09  15.44947  00 38 32.590  +04 04 43.41  25.0w 15RX277   568  C~2lVO      
2017 09  22.51463  00 38 05.205  +04 01 48.81  24.6w 15RX277   568  C~2lVO      

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     0.08       0.00    -0.12
  2   0.0136    -43.16    -0.05      -0.27    -0.01
  3   0.1529  -1981.92    -0.16      -2.93     0.07
  4   0.1532  -1987.97     0.01      -2.94     0.01
  5   0.1533  -1990.59     0.01      -2.88     0.06
  6   0.1560  -2048.19     0.08      -2.97    -0.01
  7   0.1586  -2104.36    -0.06      -2.91     0.10
  8   0.1750  -2470.34     0.11      -3.12    -0.01
  9   0.2213  -3557.37    -0.02      -3.17    -0.01
 10   0.3168  -5636.63     0.07      -1.95    -0.08
 11   0.3169  -5639.39    -0.04      -1.85     0.01
 12   0.3991  -6686.78     0.06       0.44    -0.02
 13   0.4674  -6735.38    -0.12       2.64    -0.09
 14   0.9830   3869.52    -0.01       2.80    -0.01
 15   0.9857   3872.07    -0.14       2.91     0.18
 16   1.1472   2058.97     0.02      -0.59     0.04
 17   1.1525   1946.98     0.09      -0.66     0.05
 18   1.1526   1944.05    -0.08      -0.64     0.04
 19   1.2047    759.49     0.20      -0.95    -0.04
 20   1.4502  -2963.47     0.10       4.31    -0.02
 21   1.4723  -2882.28    -0.02       4.95    -0.13
 22   1.5461  -2008.42    -0.15       7.37    -0.01
 23   2.1736   5435.56    -0.07       1.15    -0.07
 24   2.1930   4989.88     0.07       1.27     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.

15RX277    quality flag:3

Type:           2:1E      2:1E      2:1E

axisobj        47.987    48.053    47.922
ecceobj         0.206     0.209     0.203
incobj          0.074     0.074     0.074
qmin           37.184    37.110    37.310
qmax           59.484    59.552    59.408
amean          47.798    47.798    47.798
amin           47.121    47.117    47.097
amax           48.593    48.588    48.600
emean           0.207     0.208     0.205
emin            0.190     0.192     0.188
emax            0.224     0.226     0.222
imean           1.677     1.697     1.676
imin            1.395     1.433     1.299
imax            2.002     1.992     2.014
excite_mean     0.209     0.210     0.207
fracstop        1.000     1.000     1.000
cjmean          3.094     3.093     3.095

libcent 0       179.8     179.8     180.1
libamp  0       157.3     157.4     162.1
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       233.8     235.0     200.4
kozaiamp        179.9     180.0     180.0