Orbit Fit and Astrometric record for 15RY279

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: 15RY279   
# Created Wed Dec  8 02:13:32 2021
# Orbit generated from Bernstein formalism
# Fitting     33 observations of     33
# Arc:   2.44y
# First observation: 2015/07/14
#  Last observation: 2017/12/23
Preliminary a, adot, b, bdot, g, gdot:
  -0.000117   0.026900  -0.000041  -0.008534   0.026231   0.000000
# WARNING -- MRQMIN stopped after  17 iterations
# Chi-squared of fit:     9.71 DOF:     60 RMS:  0.10
# Min/Max residuals:    -0.37    0.18
# Exact a, adot, b, bdot, g, gdot:
  1.618379E-05  2.666099E-02 -4.786465E-06 -8.564549E-03  2.610779E-02  3.692234E-03
# Covariance matrix:
  1.9885E-13  5.7220E-14  9.5218E-15 -4.5431E-14  1.8068E-13  2.7453E-12
  5.7220E-14  3.6391E-13  3.7031E-14 -1.6383E-13  3.2919E-13  9.8038E-12
  9.5218E-15  3.7031E-14  1.1537E-13 -1.0943E-13  3.8073E-14  1.9899E-12
 -4.5431E-14 -1.6383E-13 -1.0943E-13  2.3408E-13 -1.7097E-13 -8.5474E-12
  1.8068E-13  3.2919E-13  3.8073E-14 -1.7097E-13  4.1203E-13  1.0252E-11
  2.7453E-12  9.8038E-12  1.9899E-12 -8.5474E-12  1.0252E-11  5.0943E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.998590   10.783162    0.998929    0.003479   -0.193864  2457218.046739
# Heliocentric elements and errors
Epoch:              2457210.5000  =  2015/07/07
Mean Anomaly:           31.27043 +/-     0.128
Argument of Peri:      133.00904 +/-     0.210
Long of Asc Node:      192.39517 +/-     0.000
Inclination:            17.78779 +/-     0.001
Eccentricity:         0.17230396 +/-    0.0006
Semi-Major Axis:     44.62456563 +/-    0.0110
Time of Perihelion: 2447752.6855 +/-      38.7
Perihelion:          36.93557609 +/-    0.0302
Aphelion:            52.31355516 +/-    0.0316
Period (y)              298.1050 +/-      0.11
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           37.99448189 +/-    0.0009
Ecliptic Y            6.22038495 +/-    0.0002
Ecliptic Z            0.66740275 +/-    0.0000
Ecliptic XDOT        -0.00012969 +/-    0.0000
Ecliptic YDOT         0.00281557 +/-    0.0000
Ecliptic ZDOT        -0.00089119 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.50609393 +/-    0.0009
Geocenter to KBO     38.30274555 +/-    0.0009
# Hcoef:  8.25

The following table shows the complete astrometric record for 15RY279. 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 (15RY279) followed by the observatory code and reference code for the source of the astrometry.

2015 07  14.54595  00 38 04.534  +05 11 11.74  24.1r 15RY279   568  C~2nvo      
2015 07  19.51084  00 38 03.122  +05 10 44.91  24.1r 15RY279   568  C~2nvo      
2015 08  11.49932  00 37 27.958  +05 05 34.21  24.3r 15RY279   568  C~2nvo      
2015 08  11.55875  00 37 27.811  +05 05 33.02  24.3r 15RY279   568  C~2nvo      
2015 09  08.40498  00 35 52.253  +04 53 23.38  23.8r 15RY279   568  C~2nvo      
2015 09  08.50910  00 35 51.809  +04 53 20.16  24.1r 15RY279   568  C~2nvo      
2015 09  08.55273  00 35 51.623  +04 53 18.82  24.1r 15RY279   568  C~2nvo      
2015 09  09.52831  00 35 47.498  +04 52 47.77  24.4w 15RY279   568  C~2nvo      
2015 09  10.46916  00 35 43.483  +04 52 17.70  24.3w 15RY279   568  C~2nvo      
2015 09  16.45837  00 35 17.148  +04 49 00.75  24.0w 15RY279   568  C~2nvo      
2015 10  03.38583  00 33 58.371  +04 39 09.86  23.9w 15RY279   568  C~2nvo      
2015 10  07.35453  00 33 39.610  +04 36 48.20  23.8r 15RY279   568  C~2nvo      
2015 10  07.40769  00 33 39.364  +04 36 46.41  23.7r 15RY279   568  C~2nvo      
2015 11  10.38589  00 31 15.638  +04 18 04.38  24.9w 15RY279   568  C~2nvo      
2015 12  07.32615  00 30 11.522  +04 08 18.31  24.4w 15RY279   568  C~2nvo      
2016 01  01.25515  00 30 11.420  +04 05 32.96  24.7w 15RY279   568  C~2nvo      
2016 09  05.53675  00 42 31.300  +05 03 26.53  24.3w 15RY279   568  C~2nvo      
2016 09  07.47613  00 42 23.406  +05 02 26.83  24.2w 15RY279   568  C~2nvo      
2016 09  07.52244  00 42 23.213  +05 02 25.42  24.2w 15RY279   568  C~2nvo      
2016 11  03.42043  00 38 08.110  +04 30 18.34  24.2w 15RY279   568  C~2nvo      
2016 11  03.48549  00 38 07.828  +04 30 16.00  24.4w 15RY279   568  C~2nvo      
2016 11  03.49709  00 38 07.782  +04 30 15.80  24.6w 15RY279   568  C~2nvo      
2016 11  04.26545  00 38 04.853  +04 29 52.72  24.4w 15RY279   568  C~2nvo      
2016 11  04.28299  00 38 04.787  +04 29 52.10  24.3w 15RY279   568  C~2nvo      
2016 11  04.32471  00 38 04.616  +04 29 50.98  24.5w 15RY279   568  C~2nvo      
2016 11  04.34222  00 38 04.552  +04 29 50.42  24.2w 15RY279   568  C~2nvo      
2016 12  29.26158  00 36 30.555  +04 14 35.86  24.5w 15RY279   568  C~2nvo      
2017 01  03.23211  00 36 35.917  +04 14 41.98  24.8w 15RY279   568  C~2nvo      
2017 01  27.23800  00 37 35.268  +04 18 46.75  24.5w 15RY279   568  C~2nvo      
2017 01  28.23385  00 37 38.852  +04 19 04.19  24.1w 15RY279   568  C~2nvo      
2017 01  30.24057  00 37 46.374  +04 19 40.82  24.0w 15RY279   568  C~2nvo      
2017 11  22.36455  00 43 32.132  +04 30 52.65  24.3w 15RY279   568  C~2nvo      
2017 12  23.29716  00 42 48.183  +04 23 41.00  24.6w 15RY279   568  C~2nvo      

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    -0.01       0.00    -0.08
     2   0.0136    -29.93     0.00     -16.40    -0.12
     3   0.0765   -635.06    -0.05     -95.99     0.03
     4   0.0767   -637.55     0.04     -96.22    -0.02
     5   0.1529  -2237.41    -0.05    -206.23     0.02
     6   0.1532  -2244.78     0.02    -206.58     0.05
     7   0.1533  -2247.86     0.06    -206.72     0.08
     8   0.1560  -2316.76     0.02    -211.03    -0.04
     9   0.1586  -2383.77    -0.00    -215.09    -0.00
    10   0.1750  -2823.19     0.01    -241.38     0.07
    11   0.2213  -4138.71     0.02    -321.15    -0.02
    12   0.2322  -4452.46    -0.05    -340.91    -0.02
    13   0.2323  -4456.55     0.12    -341.11     0.02
    14   0.3254  -6876.05    -0.08    -525.00     0.18
    15   0.3991  -7990.11     0.05    -684.99    -0.01
    16   0.4674  -8056.92    -0.02    -836.42    -0.02
    17   1.1471   3485.56    -0.04   -1988.88    -0.06
    18   1.1524   3353.62     0.01   -1997.73    -0.01
    19   1.1526   3350.41     0.05   -1997.90     0.00
    20   1.3083   -913.47     0.11   -2277.75    -0.01
    21   1.3085   -918.27    -0.37   -2278.25    -0.20
    22   1.3086   -918.98    -0.31   -2278.17    -0.05
    23   1.3107   -968.33     0.08   -2282.21    -0.00
    24   1.3107   -969.48     0.08   -2282.40    -0.10
    25   1.3108   -972.27     0.04   -2282.42     0.06
    26   1.3109   -973.37     0.10   -2282.56     0.00
    27   1.4612  -2625.67     0.05   -2571.85    -0.01
    28   1.4748  -2549.49     0.08   -2597.74     0.11
    29   1.5406  -1636.74     0.02   -2721.22     0.10
    30   1.5433  -1580.58    -0.15   -2726.22     0.14
    31   1.5488  -1462.71     0.09   -2736.68    -0.18
    32   2.3595   3559.66    -0.11   -4143.54     0.04
    33   2.4442   2785.70     0.18   -4284.10     0.04

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.

15RY279    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        45.100    45.139    45.062
ecceobj         0.180     0.182     0.178
incobj         17.711    17.712    17.710
qmin           36.209    36.165    36.283
qmax           53.848    53.879    53.682
amean          44.847    44.855    44.769
amin           44.467    44.441    44.377
amax           45.311    45.309    45.223
emean           0.173     0.175     0.170
emin            0.159     0.161     0.156
emax            0.190     0.191     0.188
imean          18.067    18.061    18.068
imin           17.463    17.431    17.461
imax           18.620    18.626    18.609
excite_mean     0.355     0.356     0.354
fracstop        1.000     1.000     1.000
cjmean          2.956     2.956     2.957

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       178.9     179.7     179.0
kozaiamp        180.0     180.0     180.0