Orbit Fit and Astrometric record for 15RQ278

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: 15RQ278   
# Created Wed Dec  8 02:13:31 2021
# Orbit generated from Bernstein formalism
# Fitting     22 observations of     22
# Arc:   2.42y
# First observation: 2015/06/23
#  Last observation: 2017/11/22
Preliminary a, adot, b, bdot, g, gdot:
  -0.000035   0.020655  -0.000006   0.006674   0.022778   0.000000
# Chi-squared of fit:     9.68 DOF:     38 RMS:  0.12
# Min/Max residuals:    -0.40    0.20
# Exact a, adot, b, bdot, g, gdot:
  1.424994E-05  2.011228E-02  4.480144E-06  6.525972E-03  2.227780E-02 -1.621444E-03
# Covariance matrix:
  2.6329E-13  1.3499E-13 -3.7900E-14  8.7489E-14  3.3269E-13  5.6976E-12
  1.3499E-13  8.7709E-13 -1.3369E-13  3.5541E-13  9.5020E-13  2.3061E-11
 -3.7900E-14 -1.3369E-13  1.8413E-13 -1.6518E-13 -1.6059E-13 -4.1408E-12
  8.7489E-14  3.5541E-13 -1.6518E-13  2.8557E-13  4.0878E-13  1.1612E-11
  3.3269E-13  9.5020E-13 -1.6059E-13  4.0878E-13  1.2280E-12  2.6553E-11
  5.6976E-12  2.3061E-11 -4.1408E-12  1.1612E-11  2.6553E-11  7.5251E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    3.223564    9.644234    1.006652   -0.007778    0.139727  2457197.024748
# Heliocentric elements and errors
Epoch:              2457190.5000  =  2015/06/17
Mean Anomaly:          288.89123 +/-     0.043
Argument of Peri:       92.81534 +/-     0.109
Long of Asc Node:      358.58115 +/-     0.001
Inclination:            18.40714 +/-     0.001
Eccentricity:         0.10184188 +/-    0.0013
Semi-Major Axis:     45.82411947 +/-    0.0143
Time of Perihelion: 2479570.5091 +/-       8.7
Perihelion:          41.15730477 +/-    0.0614
Aphelion:            50.49093418 +/-    0.0621
Period (y)              310.2054 +/-      0.15
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           44.21046151 +/-    0.0022
Ecliptic Y            6.49274607 +/-    0.0004
Ecliptic Z            2.52439420 +/-    0.0001
Ecliptic XDOT        -0.00065715 +/-    0.0000
Ecliptic YDOT         0.00238966 +/-    0.0000
Ecliptic ZDOT         0.00078961 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   44.75592949 +/-    0.0022
Geocenter to KBO     44.88773088 +/-    0.0022
# Hcoef:  8.39

The following table shows the complete astrometric record for 15RQ278. 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 (15RQ278) followed by the observatory code and reference code for the source of the astrometry.

2015 06  23.52397  00 30 20.706  +06 47 02.28  24.9r 15RQ278   568  C~2lVR      
2015 07  19.58735  00 30 24.045  +06 51 13.30  24.4r 15RQ278   568  C~2lVR      
2015 08  20.42114  00 29 17.755  +06 48 30.39  24.7r 15RQ278   568  C~2lVR      
2015 08  20.47056  00 29 17.584  +06 48 29.83  24.8r 15RQ278   568  C~2lVR      
2015 09  09.39585  00 28 05.446  +06 43 03.04  25.1r 15RQ278   568  C~2lVR      
2015 09  09.43729  00 28 05.279  +06 43 02.25  24.8r 15RQ278   568  C~2lVR      
2015 09  09.47825  00 28 05.112  +06 43 01.44  25.2r 15RQ278   568  C~2lVR      
2015 09  10.50253  00 28 00.971  +06 42 40.94  24.8w 15RQ278   568  C~2lVR      
2015 09  18.46210  00 27 27.758  +06 39 52.36  24.7w 15RQ278   568  C~2lVR      
2015 10  09.31945  00 25 57.097  +06 31 41.67  25.1w 15RQ278   568  C~2lVR      
2016 09  05.59522  00 32 02.805  +07 33 07.94  25.1w 15RQ278   568  C~2lVR      
2016 09  06.54431  00 31 59.081  +07 32 50.41  25.0w 15RQ278   568  C~2lVR      
2016 09  06.58642  00 31 58.908  +07 32 49.61  25.6w 15RQ278   568  C~2lVR      
2016 09  27.50093  00 30 30.740  +07 25 23.28  24.9w 15RQ278   568  C~2lVR      
2016 11  03.31592  00 27 58.286  +07 10 46.85  25.2w 15RQ278   568  C~2lVR      
2016 11  03.36828  00 27 58.089  +07 10 45.57  25.4w 15RQ278   568  C~2lVR      
2016 12  25.22839  00 26 25.556  +07 00 11.60  24.8w 15RQ278   568  C~2lVR      
2017 01  02.27514  00 26 30.809  +07 00 30.83  26.0w 15RQ278   568  C~2lVR      
2017 01  29.23654  00 27 27.908  +07 05 57.48  25.2w 15RQ278   568  C~2lVR      
2017 09  16.48602  00 35 06.569  +08 18 52.03  24.8w 15RQ278   568  C~2lVR      
2017 09  22.43395  00 34 41.099  +08 16 43.38  24.9w 15RQ278   568  C~2lVR      
2017 11  22.34963  00 30 45.986  +07 53 47.12  25.1w 15RQ278   568  C~2lVR      

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     0.03
     2   0.0714    144.82    -0.01     210.98     0.07
     3   0.1585   -826.50     0.20     451.46    -0.09
     4   0.1586   -829.06     0.04     451.96     0.04
     5   0.2132  -1945.27    -0.05     577.05     0.11
     6   0.2133  -1947.87    -0.00     577.31     0.12
     7   0.2134  -1950.47     0.02     577.55     0.11
     8   0.2162  -2015.24     0.08     583.16     0.00
     9   0.2380  -2536.41    -0.40     624.40    -0.38
    10   0.2951  -3971.52     0.10     709.79     0.02
    11   1.2048   2487.52     0.09    1942.05     0.01
    12   1.2074   2429.70    -0.02    1947.76     0.01
    13   1.2076   2427.02    -0.09    1948.04     0.02
    14   1.2648   1045.88    -0.07    2055.11     0.13
    15   1.3656  -1384.23     0.16    2147.16    -0.01
    16   1.3658  -1387.43     0.01    2147.14    -0.09
    17   1.5077  -2903.53     0.14    2111.25    -0.05
    18   1.5298  -2824.09    -0.16    2097.86    -0.17
    19   1.6036  -1914.08    -0.03    2060.61    -0.05
    20   2.2340   6078.88    -0.06    3392.53     0.10
    21   2.2503   5680.31     0.04    3422.53    -0.08
    22   2.4170   1926.95     0.01    3531.45     0.12

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.

15RQ278    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        46.275    46.310    46.241
ecceobj         0.103     0.106     0.100
incobj         18.313    18.313    18.312
qmin           40.724    40.603    40.866
qmax           51.605    51.747    51.407
amean          46.010    46.050    45.983
amin           45.654    45.678    45.616
amax           46.414    46.449    46.382
emean           0.099     0.102     0.096
emin            0.088     0.091     0.085
emax            0.112     0.115     0.108
imean          18.792    18.801    18.795
imin           18.468    18.473    18.474
imax           19.051    19.068    19.052
excite_mean     0.337     0.338     0.336
fracstop        1.000     1.000     1.000
cjmean          2.983     2.982     2.983

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       175.6     175.6     175.9
kozaiamp        179.9     180.0     179.9