Orbit Fit and Astrometric record for 15RD278

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: 15RD278   
# Created Fri Dec  3 02:13:28 2021
# Orbit generated from Bernstein formalism
# Fitting     32 observations of     32
# Arc:   2.18y
# First observation: 2015/07/19
#  Last observation: 2017/09/22
Preliminary a, adot, b, bdot, g, gdot:
  -0.000178   0.028092   0.000001  -0.001273   0.026154   0.000000
# Chi-squared of fit:    11.81 DOF:     58 RMS:  0.11
# Min/Max residuals:    -0.27    0.25
# Exact a, adot, b, bdot, g, gdot:
  1.633334E-05  2.770610E-02 -6.153433E-07 -1.261796E-03  2.603410E-02  7.419275E-04
# Covariance matrix:
  1.9577E-13 -2.6770E-14  6.3946E-16 -3.5084E-15  1.3199E-13  1.5502E-12
 -2.6770E-14  3.5215E-13  4.1291E-15 -1.8338E-14  2.0298E-13  7.9377E-12
  6.3946E-16  4.1291E-15  1.1213E-13 -8.8184E-14  3.0381E-15  1.4137E-13
 -3.5084E-15 -1.8338E-14 -8.8184E-14  1.1656E-13 -1.4277E-14 -6.2300E-13
  1.3199E-13  2.0298E-13  3.0381E-15 -1.4277E-14  2.6723E-13  6.2167E-12
  1.5502E-12  7.9377E-12  1.4137E-13 -6.2300E-13  6.2167E-12  2.6944E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.215838    8.919508    0.970059    0.001258   -0.307236  2457223.003419
# Heliocentric elements and errors
Epoch:              2457220.5000  =  2015/07/17
Mean Anomaly:            0.31539 +/-     0.274
Argument of Peri:      174.89346 +/-     0.343
Long of Asc Node:      192.18089 +/-     0.001
Inclination:             2.61391 +/-     0.001
Eccentricity:         0.10962061 +/-    0.0001
Semi-Major Axis:     43.49488291 +/-    0.0029
Time of Perihelion: 2457128.7089 +/-      79.7
Perihelion:          38.72694719 +/-    0.0036
Aphelion:            48.26281862 +/-    0.0041
Period (y)              286.8570 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           38.39674398 +/-    0.0008
Ecliptic Y            5.04509586 +/-    0.0001
Ecliptic Z            0.14472711 +/-    0.0000
Ecliptic XDOT        -0.00037643 +/-    0.0000
Ecliptic YDOT         0.00288433 +/-    0.0000
Ecliptic ZDOT        -0.00013234 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.72704335 +/-    0.0007
Geocenter to KBO     38.41115535 +/-    0.0008
# Hcoef:  8.92

The following table shows the complete astrometric record for 15RD278. 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 (15RD278) followed by the observatory code and reference code for the source of the astrometry.

2015 07  19.50263  00 32 26.103  +03 44 03.51  24.7r 15RD278   568  C~2lVP      
2015 08  11.48475  00 31 46.628  +03 39 39.89  24.6r 15RD278   568  C~2lVP      
2015 08  11.52861  00 31 46.495  +03 39 39.33  24.7r 15RD278   568  C~2lVP      
2015 09  08.39268  00 30 07.131  +03 28 45.50  24.4r 15RD278   568  C~2lVP      
2015 09  08.49686  00 30 06.682  +03 28 42.38  24.5r 15RD278   568  C~2lVP      
2015 09  08.54047  00 30 06.489  +03 28 41.12  24.9r 15RD278   568  C~2lVP      
2015 09  09.51600  00 30 02.261  +03 28 13.53  24.9w 15RD278   568  C~2lVP      
2015 09  10.45696  00 29 58.164  +03 27 46.46  24.9w 15RD278   568  C~2lVP      
2015 09  16.44258  00 29 31.341  +03 24 49.86  25.0w 15RD278   568  C~2lVP      
2015 10  07.33735  00 27 52.769  +03 14 00.02  24.8r 15RD278   568  C~2lVP      
2015 10  07.39541  00 27 52.510  +03 13 58.30  25.7r 15RD278   568  C~2lVP      
2015 11  07.23400  00 25 40.361  +02 59 18.99  25.2w 15RD278   568  C~2lVP      
2015 11  07.28647  00 25 40.174  +02 59 17.69  24.9w 15RD278   568  C~2lVP      
2015 11  10.36441  00 25 29.524  +02 58 05.64  25.0w 15RD278   568  C~2lVP      
2015 12  07.31039  00 24 27.208  +02 50 55.70  24.8w 15RD278   568  C~2lVP      
2016 01  01.23954  00 24 29.064  +02 50 40.19  25.2w 15RD278   568  C~2lVP      
2016 07  07.57912  00 38 23.787  +04 17 33.98  25.2w 15RD278   568  C~2lVP      
2016 07  08.55858  00 38 24.196  +04 17 36.09  24.8w 15RD278   568  C~2lVP      
2016 09  05.53271  00 36 18.831  +04 03 41.31  24.8w 15RD278   568  C~2lVP      
2016 09  05.54486  00 36 18.796  +04 03 41.06        15RD278   568  C~2lVP      
2016 09  07.47209  00 36 10.699  +04 02 48.02  25.1w 15RD278   568  C~2lVP      
2016 09  07.48422  00 36 10.649  +04 02 47.78  25.2w 15RD278   568  C~2lVP      
2016 09  07.51840  00 36 10.493  +04 02 46.89  24.7w 15RD278   568  C~2lVP      
2016 09  07.53054  00 36 10.441  +04 02 46.40  24.9w 15RD278   568  C~2lVP      
2016 09  26.54877  00 34 44.039  +03 53 19.99  25.7w 15RD278   568  C~2lVP      
2016 11  03.40883  00 31 53.236  +03 34 33.58  25.3w 15RD278   568  C~2lVP      
2016 11  03.47388  00 31 52.983  +03 34 31.83  24.6w 15RD278   568  C~2lVP      
2016 12  25.24114  00 30 17.195  +03 23 27.72  25.2w 15RD278   568  C~2lVP      
2017 01  02.28800  00 30 24.632  +03 24 07.78  25.8w 15RD278   568  C~2lVP      
2017 01  29.24345  00 31 34.666  +03 31 12.14  24.7w 15RD278   568  C~2lVP      
2017 09  15.44947  00 41 40.327  +04 32 55.62  24.8w 15RD278   568  C~2lVP      
2017 09  22.51463  00 41 07.975  +04 29 24.46  24.6w 15RD278   568  C~2lVP      

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     0.10       0.00    -0.03
     2   0.0629   -646.96     0.09      -9.56    -0.06
     3   0.0630   -649.01    -0.00      -9.29     0.20
     4   0.1393  -2273.95    -0.05     -23.81     0.13
     5   0.1396  -2281.36    -0.00     -24.03    -0.08
     6   0.1397  -2284.52    -0.03     -24.05    -0.09
     7   0.1424  -2353.58    -0.05     -24.43     0.11
     8   0.1450  -2420.63     0.01     -25.11     0.02
     9   0.1614  -2859.42     0.08     -28.96    -0.16
    10   0.2186  -4472.68    -0.24     -43.39    -0.04
    11   0.2187  -4476.92     0.09     -43.44    -0.08
    12   0.3032  -6644.21    -0.07     -69.07     0.13
    13   0.3033  -6647.30    -0.02     -69.15     0.06
    14   0.3117  -6822.51     0.25     -72.25    -0.27
    15   0.3855  -7851.27    -0.14     -97.91     0.08
    16   0.4538  -7831.84     0.02    -123.17    -0.14
    17   0.9694   5713.03    -0.03    -254.64    -0.03
    18   0.9721   5719.49    -0.04    -255.10    -0.02
    19   1.1336   3665.78    -0.09    -286.88    -0.02
    20   1.1336   3665.20     0.17    -286.90    -0.05
    21   1.1389   3532.91    -0.04    -288.09     0.01
    22   1.1389   3532.13     0.03    -288.02     0.08
    23   1.1390   3529.63    -0.05    -287.92     0.18
    24   1.1390   3528.73    -0.10    -288.07     0.04
    25   1.1911   2116.96     0.09    -300.79     0.05
    26   1.2947   -676.71    -0.09    -330.07    -0.01
    27   1.2949   -680.88    -0.10    -330.19    -0.10
    28   1.4367  -2260.80     0.15    -375.29     0.11
    29   1.4587  -2142.65     0.09    -382.38     0.14
    30   1.5325  -1011.61    -0.07    -405.69     0.19
    31   2.1600   8782.37     0.05    -558.05    -0.08
    32   2.1794   8253.64    -0.01    -563.10    -0.23

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.

15RD278    quality flag:3

Type:         7:4EEE    7:4EEE    7:4EEE

axisobj        43.964    43.976    43.953
ecceobj         0.119     0.120     0.119
incobj          2.601     2.602     2.601
qmin           37.846    37.693    38.030
qmax           49.970    50.060    49.841
amean          43.727    43.727    43.727
amin           43.331    43.333    43.325
amax           44.156    44.148    44.146
emean           0.112     0.113     0.111
emin            0.090     0.088     0.095
emax            0.133     0.135     0.130
imean           3.446     3.313     3.706
imin            2.594     2.620     2.819
imax            4.957     4.417     4.989
excite_mean     0.128     0.128     0.129
fracstop        1.000     1.000     1.000
cjmean          3.079     3.079     3.078

libcent 0       182.0     179.2     185.3
libamp  0        94.8      83.6     101.8
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       171.1     212.7     190.0
kozaiamp        179.8     179.8     180.0