Orbit Fit and Astrometric record for 15RF279

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: 15RF279   
# Created Fri Dec  3 02:13:29 2021
# Orbit generated from Bernstein formalism
# Fitting     32 observations of     32
# Arc:   2.42y
# First observation: 2015/06/23
#  Last observation: 2017/11/22
Preliminary a, adot, b, bdot, g, gdot:
  -0.000033   0.029784  -0.000015   0.003190   0.027511   0.000000
# Chi-squared of fit:     5.40 DOF:     58 RMS:  0.07
# Min/Max residuals:    -0.23    0.25
# Exact a, adot, b, bdot, g, gdot:
  1.680441E-05  2.876353E-02  1.854447E-06  3.070809E-03  2.677792E-02 -5.186059E-03
# Covariance matrix:
  1.6870E-13  1.6877E-14 -8.6117E-15  1.0737E-14  1.2884E-13  1.2973E-12
  1.6877E-14  4.5896E-13 -3.2627E-14  7.2111E-14  3.2886E-13  8.6945E-12
 -8.6117E-15 -3.2627E-14  1.0323E-13 -7.1754E-14 -2.9819E-14 -7.2270E-13
  1.0737E-14  7.2111E-14 -7.1754E-14  9.0020E-14  5.6391E-14  1.6924E-12
  1.2884E-13  3.2886E-13 -2.9819E-14  5.6391E-14  3.4877E-13  6.8022E-12
  1.2973E-12  8.6945E-12 -7.2270E-13  1.6924E-12  6.8022E-12  2.0402E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    3.071837   11.563034    1.001634   -0.009130    0.171950  2457197.106478
# Heliocentric elements and errors
Epoch:              2457190.5000  =  2015/06/17
Mean Anomaly:          314.44479 +/-     0.021
Argument of Peri:       96.11144 +/-     0.049
Long of Asc Node:      343.76664 +/-     0.002
Inclination:             6.94794 +/-     0.000
Eccentricity:         0.24103607 +/-    0.0005
Semi-Major Axis:     42.77833648 +/-    0.0114
Time of Perihelion: 2470122.6223 +/-       2.8
Perihelion:          32.46721446 +/-    0.0232
Aphelion:            53.08945851 +/-    0.0257
Period (y)              279.7976 +/-      0.11
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           36.56226190 +/-    0.0008
Ecliptic Y            6.45937722 +/-    0.0002
Ecliptic Z            2.00132475 +/-    0.0000
Ecliptic XDOT        -0.00112716 +/-    0.0000
Ecliptic YDOT         0.00276544 +/-    0.0000
Ecliptic ZDOT         0.00028517 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.18235939 +/-    0.0008
Geocenter to KBO     37.34420525 +/-    0.0008
# Hcoef:  8.25

The following table shows the complete astrometric record for 15RF279. 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 (15RF279) followed by the observatory code and reference code for the source of the astrometry.

2015 06  23.60570  00 37 41.050  +07 23 57.64  24.2r 15RF279   568  C~2lVT      
2015 08  13.54561  00 37 10.916  +07 26 50.91  23.4r 15RF279   568  C~2lVT      
2015 08  13.61739  00 37 10.727  +07 26 50.25  24.0r 15RF279   568  C~2lVT      
2015 08  19.55480  00 36 52.134  +07 25 28.80  23.5r 15RF279   568  C~2lVT      
2015 08  20.43022  00 36 49.178  +07 25 15.30  23.8r 15RF279   568  C~2lVT      
2015 08  20.47949  00 36 49.015  +07 25 14.47  23.9r 15RF279   568  C~2lVT      
2015 09  07.57672  00 35 36.823  +07 19 10.58  24.2w 15RF279   568  C~2lVT      
2015 09  09.40442  00 35 28.561  +07 18 26.00  24.0r 15RF279   568  C~2lVT      
2015 09  09.44553  00 35 28.373  +07 18 24.95  24.1r 15RF279   568  C~2lVT      
2015 09  09.48644  00 35 28.183  +07 18 24.00  24.1r 15RF279   568  C~2lVT      
2015 09  10.51074  00 35 23.479  +07 17 58.44  24.2w 15RF279   568  C~2lVT      
2015 09  18.47260  00 34 45.602  +07 14 27.96  24.3w 15RF279   568  C~2lVT      
2015 10  08.36042  00 33 05.617  +07 04 39.39  24.1w 15RF279   568  C~2lVT      
2015 10  08.41303  00 33 05.342  +07 04 37.80  24.0w 15RF279   568  C~2lVT      
2015 11  10.45634  00 30 35.540  +06 48 32.27  24.5w 15RF279   568  C~2lVT      
2015 12  08.25463  00 29 24.127  +06 39 38.70  24.4w 15RF279   568  C~2lVT      
2016 01  01.31706  00 29 22.324  +06 37 55.56  24.2w 15RF279   568  C~2lVT      
2016 01  02.26815  00 29 23.502  +06 37 59.25  24.0w 15RF279   568  C~2lVT      
2016 09  05.57499  00 41 44.157  +08 09 50.94        15RF279   568  C~2lVT      
2016 09  06.52410  00 41 39.982  +08 09 29.16        15RF279   568  C~2lVT      
2016 09  06.56619  00 41 39.796  +08 09 28.08        15RF279   568  C~2lVT      
2016 09  27.47990  00 39 58.994  +08 00 10.02  24.1w 15RF279   568  C~2lVT      
2016 11  03.41462  00 36 59.207  +07 41 34.07        15RF279   568  C~2lVT      
2016 11  03.47967  00 36 58.922  +07 41 32.14        15RF279   568  C~2lVT      
2016 12  29.25523  00 35 10.408  +07 27 00.08  24.4w 15RF279   568  C~2lVT      
2017 01  03.22553  00 35 15.598  +07 27 11.75  24.2w 15RF279   568  C~2lVT      
2017 01  27.27188  00 36 16.151  +07 32 00.24  24.1w 15RF279   568  C~2lVT      
2017 01  28.26808  00 36 19.853  +07 32 20.06        15RF279   568  C~2lVT      
2017 09  16.50002  00 47 02.733  +08 55 59.09  24.0w 15RF279   568  C~2lVT      
2017 09  17.39915  00 46 58.407  +08 55 35.62        15RF279   568  C~2lVT      
2017 09  22.45345  00 46 33.510  +08 53 18.84  24.1w 15RF279   568  C~2lVT      
2017 11  22.33845  00 41 54.461  +08 24 05.02  24.1w 15RF279   568  C~2lVT      

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     0.04       0.00    -0.01
     2   0.1395   -344.02    -0.18     335.52    -0.02
     3   0.1397   -346.87     0.25     336.02     0.02
     4   0.1559   -633.17    -0.08     369.91    -0.03
     5   0.1583   -678.90    -0.12     374.79     0.09
     6   0.1584   -681.46    -0.01     374.98    -0.02
     7   0.2080  -1811.96     0.00     463.34     0.04
     8   0.2130  -1942.52    -0.06     470.81     0.05
     9   0.2131  -1945.50    -0.03     470.95    -0.01
    10   0.2132  -1948.48     0.00     471.19     0.05
    11   0.2160  -2022.88     0.03     475.28     0.02
    12   0.2378  -2623.88     0.14     504.10    -0.04
    13   0.2923  -4223.89     0.00     551.02    -0.04
    14   0.2924  -4228.28    -0.04     551.18     0.01
    15   0.3829  -6660.57     0.08     547.70    -0.23
    16   0.4590  -7850.23    -0.06     480.01     0.01
    17   0.5249  -7915.93    -0.07     395.96     0.08
    18   0.5275  -7898.33     0.08     392.37    -0.02
    19   1.2046   4403.71    -0.03    1117.33     0.07
    20   1.2072   4338.10     0.01    1121.51     0.05
    21   1.2073   4335.14     0.03    1121.59    -0.07
    22   1.2645   2738.62     0.03    1193.71     0.01
    23   1.3657   -156.76     0.06    1216.00     0.05
    24   1.3658   -161.41    -0.05    1215.89    -0.00
    25   1.5185  -1988.06    -0.05    1049.75     0.05
    26   1.5322  -1912.51    -0.03    1030.03     0.09
    27   1.5980   -971.09     0.10     940.38     0.00
    28   1.6007   -912.68    -0.03     936.93    -0.15
    29   2.2338   9841.03    -0.05    1829.06    -0.04
    30   2.2363   9772.68     0.04    1832.26    -0.03
    31   2.2501   9378.70     0.03    1849.20     0.09
    32   2.4168   4878.51    -0.05    1844.03    -0.05

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.

15RF279    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        43.229    43.254    43.204
ecceobj         0.244     0.245     0.243
incobj          6.920     6.920     6.920
qmin           32.273    31.495    32.000
qmax           55.946    56.842    53.831
amean          43.364    42.967    42.298
amin           42.220    42.204    41.646
amax           44.391    44.390    43.303
emean           0.222     0.233     0.215
emin            0.186     0.198     0.176
emax            0.263     0.280     0.247
imean          10.344    11.808    14.199
imin            6.463     7.910     7.910
imax           13.444    14.264    18.265
excite_mean     0.288     0.311     0.327
fracstop        1.000     1.000     1.000
cjmean          2.993     2.970     2.953

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       183.6     181.7     183.1
kozaiamp        179.9     180.0     180.0