Orbit Fit and Astrometric record for 15RH280

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: 15RH280   
# Created Tue Apr  1 01:10:33 2025
# Orbit generated from Bernstein formalism
# Fitting     30 observations of     30
# Arc:   2.44y
# First observation: 2015/07/14
#  Last observation: 2017/12/23
Preliminary a, adot, b, bdot, g, gdot:
  -0.000037   0.025696   0.000002  -0.000891   0.024920   0.000000
# Chi-squared of fit:    12.74 DOF:     54 RMS:  0.12
# Min/Max residuals:    -0.35    0.27
# Exact a, adot, b, bdot, g, gdot:
  1.767048E-05  2.523360E-02 -7.061924E-07 -8.777011E-04  2.458857E-02 -7.888703E-04
# Covariance matrix:
  2.2057E-13  2.8126E-14 -1.3152E-15 -3.4541E-15  1.7522E-13  2.1483E-12
  2.8126E-14  3.8853E-13  7.6814E-16 -1.4603E-14  2.7383E-13  8.9678E-12
 -1.3152E-15  7.6814E-16  1.0635E-13 -6.7715E-14 -9.8597E-16  3.3477E-14
 -3.4541E-15 -1.4603E-14 -6.7715E-14  7.8584E-14 -1.1749E-14 -4.2922E-13
  1.7522E-13  2.7383E-13 -9.8597E-16 -1.1749E-14  3.3866E-13  7.2440E-12
  2.1483E-12  8.9678E-12  3.3477E-14 -4.2922E-13  7.2440E-12  2.6338E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.387056   11.606846    1.001546    0.004456   -0.179818  2457218.068079
# Heliocentric elements and errors
Epoch:              2457210.5000  =  2015/07/07
Mean Anomaly:          330.41922 +/-     0.244
Argument of Peri:      181.06995 +/-     0.317
Long of Asc Node:      225.32850 +/-     0.008
Inclination:             2.39873 +/-     0.001
Eccentricity:         0.10475669 +/-    0.0004
Semi-Major Axis:     44.80266481 +/-    0.0047
Time of Perihelion: 2466210.8885 +/-      74.4
Perihelion:          40.10928590 +/-    0.0183
Aphelion:            49.49604373 +/-    0.0185
Period (y)              299.8914 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           40.20008272 +/-    0.0009
Ecliptic Y            7.23560473 +/-    0.0002
Ecliptic Z            0.98447723 +/-    0.0000
Ecliptic XDOT        -0.00065128 +/-    0.0000
Ecliptic YDOT         0.00272874 +/-    0.0000
Ecliptic ZDOT        -0.00009976 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.85792239 +/-    0.0009
Geocenter to KBO     40.66929662 +/-    0.0010
# Hcoef:  9.00

The following table shows the complete astrometric record for 15RH280. 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 (15RH280) followed by the observatory code and reference code for the source of the astrometry.

2015 07  14.56729  00 40 30.484  +05 52 00.49  25.5r 15RH280   568  C~2nvp      
2015 07  19.54532  00 40 28.934  +05 51 59.01  25.2r 15RH280   568  C~2nvp      
2015 08  11.54916  00 39 54.548  +05 48 54.94  26.0r 15RH280   568  C~2nvp      
2015 09  08.41317  00 38 22.534  +05 39 34.73  24.9r 15RH280   568  C~2nvp      
2015 09  08.51862  00 38 22.087  +05 39 32.07  24.9r 15RH280   568  C~2nvp      
2015 09  08.56094  00 38 21.916  +05 39 30.97  25.1r 15RH280   568  C~2nvp      
2015 09  09.53652  00 38 17.945  +05 39 06.03  25.0w 15RH280   568  C~2nvp      
2015 09  10.47732  00 38 14.084  +05 38 41.63  24.8w 15RH280   568  C~2nvp      
2015 09  16.46890  00 37 48.735  +05 36 01.88  25.7w 15RH280   568  C~2nvp      
2015 10  07.36274  00 36 14.617  +05 25 56.12  25.5r 15RH280   568  C~2nvp      
2015 10  07.41585  00 36 14.363  +05 25 54.39  25.2r 15RH280   568  C~2nvp      
2015 11  07.26021  00 34 05.064  +05 11 27.74  25.2w 15RH280   568  C~2nvp      
2015 11  07.31308  00 34 04.871  +05 11 26.43  25.4w 15RH280   568  C~2nvp      
2015 11  10.39917  00 33 54.144  +05 10 11.87  24.9w 15RH280   568  C~2nvp      
2015 12  07.33665  00 32 49.190  +05 02 12.55        15RH280   568  C~2nvp      
2016 01  01.26556  00 32 44.752  +05 00 35.46  25.7w 15RH280   568  C~2nvp      
2016 09  05.50258  00 44 02.318  +06 12 09.39  24.7w 15RH280   568  C~2nvp      
2016 09  06.45678  00 43 58.592  +06 11 46.70  25.0w 15RH280   568  C~2nvp      
2016 09  06.49805  00 43 58.430  +06 11 45.61  24.8w 15RH280   568  C~2nvp      
2016 09  26.45968  00 42 32.774  +06 02 45.65  25.8w 15RH280   568  C~2nvp      
2016 11  03.49128  00 39 46.130  +05 44 30.11  25.7w 15RH280   568  C~2nvp      
2016 11  04.27124  00 39 43.204  +05 44 10.08  25.2w 15RH280   568  C~2nvp      
2016 11  04.33051  00 39 42.981  +05 44 08.51  25.2w 15RH280   568  C~2nvp      
2016 12  29.26796  00 38 06.003  +05 31 39.77  25.4w 15RH280   568  C~2nvp      
2017 01  03.23891  00 38 10.401  +05 31 54.05  25.6w 15RH280   568  C~2nvp      
2017 09  15.43089  00 48 55.687  +06 39 38.86  25.1w 15RH280   568  C~2nvp      
2017 09  16.51398  00 48 51.060  +06 39 09.97  25.3w 15RH280   568  C~2nvp      
2017 09  22.46739  00 48 25.044  +06 36 26.64  24.8w 15RH280   568  C~2nvp      
2017 09  22.49605  00 48 24.926  +06 36 25.92  25.1w 15RH280   568  C~2nvp      
2017 12  23.28322  00 43 29.595  +06 02 53.80  25.5w 15RH280   568  C~2nvp      

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    -0.30       0.00     0.03
     2   0.0136    -21.86    -0.03       7.70     0.07
     3   0.0766   -566.07    -0.06      39.39    -0.01
     4   0.1529  -2049.11     0.14      62.75     0.01
     5   0.1532  -2056.30    -0.01      62.93     0.08
     6   0.1533  -2059.08     0.03      62.92     0.03
     7   0.1560  -2123.39    -0.01      63.25    -0.03
     8   0.1585  -2185.98    -0.07      63.44    -0.17
     9   0.1750  -2596.78     0.15      65.12    -0.07
    10   0.2322  -4127.42     0.11      60.49     0.03
    11   0.2323  -4131.59    -0.04      60.39    -0.06
    12   0.3167  -6249.35     0.04      24.21     0.04
    13   0.3169  -6252.51     0.03      24.14     0.04
    14   0.3253  -6429.34    -0.02      18.79     0.04
    15   0.3991  -7511.41     0.18     -38.92    -0.05
    16   0.4673  -7610.79    -0.25    -102.01     0.12
    17   1.1470   3381.33    -0.18    -122.71    -0.22
    18   1.1496   3321.30     0.19    -121.92     0.17
    19   1.1497   3318.65     0.22    -121.98     0.06
    20   1.2044   1931.48     0.27    -120.13    -0.11
    21   1.3085   -785.45    -0.35    -155.00     0.01
    22   1.3106   -833.48    -0.05    -156.31     0.03
    23   1.3108   -837.16     0.01    -156.45    -0.04
    24   1.4612  -2462.61    -0.04    -277.20     0.01
    25   1.4748  -2396.60     0.12    -289.85    -0.10
    26   2.1735   8055.15     0.06    -304.92     0.04
    27   2.1764   7980.30    -0.02    -304.80    -0.00
    28   2.1927   7559.06    -0.17    -304.86    -0.00
    29   2.1928   7557.16     0.03    -304.84     0.00
    30   2.4441   2714.99     0.01    -443.76     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.

15RH280    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        45.292    45.303    45.282
ecceobj         0.113     0.113     0.112
incobj          2.392     2.392     2.392
qmin           39.203    39.188    39.241
qmax           51.147    51.159    51.059
amean          45.006    45.017    44.997
amin           44.633    44.653    44.634
amax           45.410    45.414    45.396
emean           0.111     0.112     0.111
emin            0.097     0.097     0.096
emax            0.126     0.127     0.125
imean           3.817     3.812     3.820
imin            3.166     3.160     3.175
imax            4.444     4.443     4.449
excite_mean     0.130     0.130     0.129
fracstop        1.000     1.000     1.000
cjmean          3.093     3.093     3.093

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       182.2     182.2     182.2
kozaiamp        180.0     180.0     180.0