Orbit Fit and Astrometric record for 15RO281

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: 15RO281   
# Created Sat Dec  4 02:13:33 2021
# Orbit generated from Bernstein formalism
# Fitting     32 observations of     32
# Arc:   2.19y
# First observation: 2015/07/14
#  Last observation: 2017/09/22
Preliminary a, adot, b, bdot, g, gdot:
  -0.000089   0.030260   0.000004  -0.000025   0.027224   0.000000
# Chi-squared of fit:     6.48 DOF:     58 RMS:  0.08
# Min/Max residuals:    -0.16    0.27
# Exact a, adot, b, bdot, g, gdot:
  1.741886E-05  2.963046E-02  2.996793E-07 -2.873423E-05  2.691071E-02 -1.656717E-03
# Covariance matrix:
  1.3284E-13  7.3341E-15 -2.4619E-15  3.9968E-16  1.1130E-13  1.0848E-12
  7.3341E-15  5.9325E-13 -7.7076E-15  7.6632E-15  3.3413E-13  1.1943E-11
 -2.4619E-15 -7.7076E-15  7.7685E-14 -6.1354E-14 -7.2658E-15 -1.7325E-13
  3.9968E-16  7.6632E-15 -6.1354E-14  1.1353E-13  4.3650E-15  2.0025E-13
  1.1130E-13  3.3413E-13 -7.2658E-15  4.3650E-15  3.2136E-13  7.4479E-12
  1.0848E-12  1.1943E-11 -1.7325E-13  2.0025E-13  7.4479E-12  3.0578E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.384162   12.657434    1.004687    0.006816   -0.161267  2457218.064009
# Heliocentric elements and errors
Epoch:              2457210.5000  =  2015/07/07
Mean Anomaly:          335.08753 +/-     0.130
Argument of Peri:      124.53406 +/-     0.197
Long of Asc Node:      281.39469 +/-     0.016
Inclination:             2.37334 +/-     0.000
Eccentricity:         0.16788698 +/-    0.0004
Semi-Major Axis:     43.70893501 +/-    0.0056
Time of Perihelion: 2464514.6232 +/-      38.1
Perihelion:          36.37077406 +/-    0.0163
Aphelion:            51.04709596 +/-    0.0169
Period (y)              288.9772 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           36.59950206 +/-    0.0008
Ecliptic Y            7.19093233 +/-    0.0002
Ecliptic Z            1.54589661 +/-    0.0000
Ecliptic XDOT        -0.00082703 +/-    0.0000
Ecliptic YDOT         0.00289813 +/-    0.0000
Ecliptic ZDOT        -0.00000987 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.33125842 +/-    0.0008
Geocenter to KBO     37.15992837 +/-    0.0008
# Hcoef:  7.48

The following table shows the complete astrometric record for 15RO281. 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 (15RO281) followed by the observatory code and reference code for the source of the astrometry.

2015 07  14.56322  00 42 49.610  +07 11 43.28  23.1r 15RO281   568  C~2nvu      
2015 07  19.54121  00 42 48.490  +07 11 56.87  23.5r 15RO281   568  C~2nvu      
2015 08  13.49630  00 42 08.244  +07 09 17.82  23.0r 15RO281   568  C~2nvu      
2015 08  13.50040  00 42 08.222  +07 09 17.77  23.0r 15RO281   568  C~2nvu      
2015 08  13.54973  00 42 08.080  +07 09 17.11  23.1r 15RO281   568  C~2nvu      
2015 08  13.55383  00 42 08.080  +07 09 17.40  23.4r 15RO281   568  C~2nvu      
2015 08  19.56300  00 41 50.415  +07 07 45.02  23.4r 15RO281   568  C~2nvu      
2015 08  19.63315  00 41 50.180  +07 07 44.07  23.1r 15RO281   568  C~2nvu      
2015 08  20.43431  00 41 47.653  +07 07 30.11  23.0r 15RO281   568  C~2nvu      
2015 08  20.48358  00 41 47.490  +07 07 29.26  23.3r 15RO281   568  C~2nvu      
2015 09  07.58083  00 40 38.417  +07 00 58.18  23.2w 15RO281   568  C~2nvu      
2015 09  09.41265  00 40 30.428  +07 00 11.06  23.1r 15RO281   568  C~2nvu      
2015 09  09.45371  00 40 30.248  +07 00 09.99  23.3r 15RO281   568  C~2nvu      
2015 09  09.49464  00 40 30.071  +07 00 08.91  23.1r 15RO281   568  C~2nvu      
2015 09  10.51481  00 40 25.535  +06 59 41.96  23.4w 15RO281   568  C~2nvu      
2015 09  18.47789  00 39 48.791  +06 56 00.89  23.5w 15RO281   568  C~2nvu      
2015 10  08.36568  00 38 11.065  +06 45 49.24  23.4w 15RO281   568  C~2nvu      
2015 10  08.41827  00 38 10.794  +06 45 47.57  23.2w 15RO281   568  C~2nvu      
2015 10  09.33525  00 38 06.259  +06 45 18.31  23.4w 15RO281   568  C~2nvu      
2015 11  10.46169  00 35 42.510  +06 29 11.38  23.3w 15RO281   568  C~2nvu      
2015 12  08.25986  00 34 30.446  +06 19 55.19  23.4w 15RO281   568  C~2nvu      
2016 01  01.32226  00 34 27.125  +06 17 51.46  23.4w 15RO281   568  C~2nvu      
2016 01  02.27354  00 34 28.224  +06 17 54.31  23.6w 15RO281   568  C~2nvu      
2016 09  05.48236  00 47 09.951  +07 42 00.94  23.4w 15RO281   568  C~2nvu      
2016 09  06.43656  00 47 05.936  +07 41 37.74  23.4w 15RO281   568  C~2nvu      
2016 09  06.47701  00 47 05.756  +07 41 36.68  23.3w 15RO281   568  C~2nvu      
2016 09  26.43941  00 45 33.052  +07 32 21.31  23.4w 15RO281   568  C~2nvu      
2016 11  04.28877  00 42 27.615  +07 12 17.25  23.5w 15RO281   568  C~2nvu      
2016 11  04.34801  00 42 27.358  +07 12 15.56  23.3w 15RO281   568  C~2nvu      
2017 01  02.32887  00 40 43.984  +06 57 42.25  23.8w 15RO281   568  C~2nvu      
2017 09  16.52330  00 52 51.152  +08 17 43.13  23.5w 15RO281   568  C~2nvu      
2017 09  22.47675  00 52 22.991  +08 14 55.23  23.2w 15RO281   568  C~2nvu      

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    -0.00       0.00    -0.07
     2   0.0136    -10.02     0.09      19.03    -0.08
     3   0.0820   -623.46     0.12     107.08    -0.10
     4   0.0820   -623.78    -0.03     107.16    -0.04
     5   0.0821   -625.98    -0.08     107.38    -0.00
     6   0.0821   -625.87     0.21     107.65     0.25
     7   0.0986   -903.97    -0.16     125.61     0.01
     8   0.0988   -907.56    -0.16     126.10     0.27
     9   0.1009   -947.63     0.01     127.99    -0.04
    10   0.1011   -950.20     0.02     128.16    -0.04
    11   0.1506  -2049.49    -0.11     171.44     0.03
    12   0.1556  -2177.39    -0.06     174.76     0.09
    13   0.1558  -2180.27     0.01     174.82     0.07
    14   0.1559  -2183.12     0.11     174.87     0.01
    15   0.1587  -2255.82    -0.01     176.57    -0.06
    16   0.1805  -2845.87    -0.07     188.00    -0.10
    17   0.2349  -4425.07     0.04     197.68    -0.05
    18   0.2351  -4429.44    -0.03     197.74    -0.02
    19   0.2376  -4503.09     0.02     197.42    -0.06
    20   0.3255  -6854.47     0.08     152.72     0.03
    21   0.4016  -8062.59     0.08      65.84     0.00
    22   0.4675  -8157.10    -0.06     -28.33    -0.02
    23   0.4701  -8140.90    -0.03     -32.19    -0.04
    24   1.1469   4275.05    -0.03     163.27    -0.03
    25   1.1496   4211.02     0.10     165.11    -0.01
    26   1.1497   4208.14     0.01     165.17    -0.04
    27   1.2043   2721.95    -0.02     190.30     0.05
    28   1.3107   -287.93     0.04     159.34    -0.07
    29   1.3108   -292.12    -0.04     159.28    -0.03
    30   1.4723  -2050.10    -0.02     -41.31     0.01
    31   2.1765   9784.09    -0.02     175.05     0.04
    32   2.1928   9332.69     0.01     181.46     0.03

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.

15RO281    quality flag:2

Type:       SCATNEAR  SCATNEAR CLASSICAL

axisobj        44.201    44.210    44.191
ecceobj         0.175     0.176     0.175
incobj          2.374     2.374     2.374
qmin           35.635    35.344    35.859
qmax           52.554    52.891    52.357
amean          43.870    43.879    43.864
amin           43.453    43.437    43.450
amax           44.340    44.357    44.319
emean           0.166     0.169     0.161
emin            0.145     0.138     0.133
emax            0.185     0.192     0.182
imean           5.221     5.073     4.975
imin            3.430     2.955     3.103
imax            6.995     7.178     6.820
excite_mean     0.190     0.192     0.184
fracstop        1.000     1.000     1.000
cjmean          3.056     3.054     3.058

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       180.2     181.9     180.1
kozaiamp        180.0     180.0     180.0