Orbit Fit and Astrometric record for 15RW280

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: 15RW280   
# Created Mon Dec  6 02:13:30 2021
# Orbit generated from Bernstein formalism
# Fitting     27 observations of     27
# Arc:   2.44y
# First observation: 2015/07/14
#  Last observation: 2017/12/23
Preliminary a, adot, b, bdot, g, gdot:
  -0.000129   0.015807  -0.000026  -0.009975   0.021646   0.000000
# Chi-squared of fit:    13.97 DOF:     48 RMS:  0.13
# Min/Max residuals:    -0.38    0.27
# Exact a, adot, b, bdot, g, gdot:
  1.176313E-05  1.568526E-02 -8.578457E-06 -9.949623E-03  2.160711E-02  1.523636E-03
# Covariance matrix:
  2.5235E-13  3.5504E-14  3.0885E-14 -1.5258E-13  2.6532E-13  7.5221E-12
  3.5504E-14  2.0113E-13  1.6331E-14 -8.5984E-14  2.0105E-13  4.2604E-12
  3.0885E-14  1.6331E-14  1.3115E-13 -1.7989E-13  7.0570E-14  5.0111E-12
 -1.5258E-13 -8.5984E-14 -1.7989E-13  5.6842E-13 -3.3933E-13 -2.2454E-11
  2.6532E-13  2.0105E-13  7.0570E-14 -3.3933E-13  4.9970E-13  1.6691E-11
  7.5221E-12  4.2604E-12  5.0111E-12 -2.2454E-11  1.6691E-11  1.0977E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.176219    9.382277    0.993636    0.008436   -0.219201  2457218.113129
# Heliocentric elements and errors
Epoch:              2457210.5000  =  2015/07/07
Mean Anomaly:          150.40453 +/-     0.587
Argument of Peri:       18.60243 +/-     0.584
Long of Asc Node:      191.56958 +/-     0.000
Inclination:            32.43085 +/-     0.001
Eccentricity:         0.14177394 +/-    0.0006
Semi-Major Axis:     41.25120647 +/-    0.0080
Time of Perihelion: 2416779.7486 +/-     157.4
Perihelion:          35.40286033 +/-    0.0242
Aphelion:            47.09955262 +/-    0.0249
Period (y)              264.9495 +/-      0.08
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           46.00389552 +/-    0.0015
Ecliptic Y            6.59500752 +/-    0.0002
Ecliptic Z            1.75708367 +/-    0.0001
Ecliptic XDOT        -0.00008871 +/-    0.0000
Ecliptic YDOT         0.00199387 +/-    0.0000
Ecliptic ZDOT        -0.00125242 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   46.50741737 +/-    0.0015
Geocenter to KBO     46.28106999 +/-    0.0015
# Hcoef:  8.34

The following table shows the complete astrometric record for 15RW280. 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 (15RW280) followed by the observatory code and reference code for the source of the astrometry.

2015 07  14.61234  00 31 02.456  +05 43 06.13  25.7r 15RW280   568  C~2nvr      
2015 08  13.51278  00 30 18.490  +05 36 42.72  25.3r 15RW280   568  C~2nvr      
2015 08  20.41706  00 29 59.947  +05 34 16.21  25.2r 15RW280   568  C~2nvr      
2015 08  20.46647  00 29 59.789  +05 34 15.11  25.1r 15RW280   568  C~2nvr      
2015 09  07.56274  00 28 59.820  +05 26 28.66  25.4w 15RW280   568  C~2nvr      
2015 09  09.39169  00 28 53.045  +05 25 35.82  24.8r 15RW280   568  C~2nvr      
2015 09  09.43322  00 28 52.885  +05 25 34.71  25.0r 15RW280   568  C~2nvr      
2015 09  09.47414  00 28 52.728  +05 25 33.45  24.6r 15RW280   568  C~2nvr      
2015 09  10.49775  00 28 48.876  +05 25 03.59  25.1w 15RW280   568  C~2nvr      
2015 09  18.45683  00 28 18.008  +05 21 02.82  25.4w 15RW280   568  C~2nvr      
2015 09  18.49367  00 28 17.867  +05 21 01.91  25.3w 15RW280   568  C~2nvr      
2015 10  08.34456  00 26 57.404  +05 10 24.75  25.2w 15RW280   568  C~2nvr      
2015 10  08.39721  00 26 57.196  +05 10 23.13  25.1w 15RW280   568  C~2nvr      
2015 10  09.31421  00 26 53.493  +05 09 53.01  24.8w 15RW280   568  C~2nvr      
2015 12  08.23879  00 24 02.689  +04 43 38.25  25.2w 15RW280   568  C~2nvr      
2016 01  01.30142  00 24 02.505  +04 40 03.25  24.8w 15RW280   568  C~2nvr      
2016 09  05.48640  00 33 20.925  +05 16 45.76  25.5w 15RW280   568  C~2nvr      
2016 09  06.44060  00 33 17.479  +05 16 18.66  25.3w 15RW280   568  C~2nvr      
2016 09  06.48188  00 33 17.313  +05 16 17.58  25.3w 15RW280   568  C~2nvr      
2016 09  26.43130  00 31 59.665  +05 06 08.31  25.2w 15RW280   568  C~2nvr      
2016 10  30.35270  00 29 47.137  +04 48 13.02  25.0w 15RW280   568  C~2nvr      
2016 11  03.31006  00 29 33.775  +04 46 18.17  25.2w 15RW280   568  C~2nvr      
2016 11  03.36248  00 29 33.603  +04 46 17.00  25.5w 15RW280   568  C~2nvr      
2016 12  25.23477  00 28 09.555  +04 30 29.99  25.2w 15RW280   568  C~2nvr      
2017 01  02.28151  00 28 15.179  +04 30 01.67  24.5w 15RW280   568  C~2nvr      
2017 11  22.34219  00 32 55.502  +04 28 07.52  25.3w 15RW280   568  C~2nvr      
2017 12  23.31121  00 32 20.246  +04 20 38.76  25.4w 15RW280   568  C~2nvr      

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    -0.06       0.00     0.27
     2   0.0819   -754.31     0.19     -93.36     0.11
     3   0.1008  -1066.49     0.11    -118.69    -0.06
     4   0.1009  -1069.09    -0.05    -118.77     0.03
     5   0.1504  -2075.97    -0.05    -193.59     0.06
     6   0.1555  -2189.80    -0.05    -202.15    -0.06
     7   0.1556  -2192.44    -0.04    -202.22     0.03
     8   0.1557  -2195.09    -0.08    -202.45    -0.03
     9   0.1585  -2259.74    -0.08    -207.15     0.02
    10   0.1803  -2778.43    -0.12    -246.04    -0.27
    11   0.1804  -2780.72     0.08    -246.05    -0.10
    12   0.2347  -4137.00    -0.07    -355.62     0.09
    13   0.2349  -4140.49     0.09    -355.87     0.13
    14   0.2374  -4203.24    -0.06    -361.63    -0.06
    15   0.4014  -7173.27     0.12    -795.56     0.05
    16   0.4673  -7261.26     0.22    -991.94    -0.09
    17   1.1468   1277.71     0.17   -2267.20     0.05
    18   1.1494   1219.72     0.13   -2271.85    -0.00
    19   1.1495   1217.02    -0.01   -2271.87     0.16
    20   1.2042    -89.23    -0.06   -2375.10     0.06
    21   1.2970  -2333.56    -0.38   -2582.06    -0.11
    22   1.3079  -2562.47    -0.06   -2608.72    -0.29
    23   1.3080  -2565.29     0.13   -2608.78    -0.01
    24   1.4500  -4094.43    -0.20   -2982.37    -0.18
    25   1.4721  -4028.36     0.01   -3041.65    -0.03
    26   2.3593   -220.51    -0.06   -4801.02     0.17
    27   2.4441   -882.12     0.18   -5005.98     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.

15RW280    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        41.543    41.569    41.519
ecceobj         0.135     0.136     0.133
incobj         32.257    32.259    32.255
qmin           34.302    34.193    34.253
qmax           48.770    48.836    48.710
amean          41.403    41.390    41.357
amin           41.041    41.031    41.020
amax           41.786    41.775    41.720
emean           0.149     0.150     0.149
emin            0.132     0.132     0.130
emax            0.168     0.169     0.169
imean          32.257    32.255    32.235
imin           31.803    31.784    31.760
imax           32.705    32.695    32.688
excite_mean     0.554     0.555     0.554
fracstop        1.000     1.000     1.000
cjmean          2.689     2.689     2.689

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       170.2     170.0     171.4
kozaiamp        180.0     179.9     179.9