Orbit Fit and Astrometric record for 15RU277

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: 15RU277   
# Created Sun Dec  5 02:13:23 2021
# Orbit generated from Bernstein formalism
# Fitting     37 observations of     37
# Arc:   2.50y
# First observation: 2015/06/23
#  Last observation: 2017/12/23
Preliminary a, adot, b, bdot, g, gdot:
  -0.000049   0.042457  -0.000034  -0.012181   0.034337   0.000000
# Chi-squared of fit:     9.05 DOF:     68 RMS:  0.09
# Min/Max residuals:    -0.20    0.26
# Exact a, adot, b, bdot, g, gdot:
  1.915135E-05  4.133213E-02 -5.050002E-06 -1.201234E-02  3.348812E-02 -9.259769E-04
# Covariance matrix:
  1.1122E-13  2.7189E-14 -5.5559E-18 -1.0327E-14  9.2999E-14  4.6088E-13
  2.7189E-14  5.9674E-13  4.2893E-14 -2.2947E-13  3.9914E-13  9.3534E-12
 -5.5559E-18  4.2893E-14  7.9090E-14 -7.7774E-14  2.4563E-14  1.0232E-12
 -1.0327E-14 -2.2947E-13 -7.7774E-14  2.0166E-13 -1.4455E-13 -5.0757E-12
  9.2999E-14  3.9914E-13  2.4563E-14 -1.4455E-13  3.4658E-13  5.9424E-12
  4.6088E-13  9.3534E-12  1.0232E-12 -5.0757E-12  5.9424E-12  2.0535E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.900289    9.203486    1.007689   -0.004295    0.132195  2457197.020648
# Heliocentric elements and errors
Epoch:              2457190.5000  =  2015/06/17
Mean Anomaly:          350.55517 +/-     0.054
Argument of Peri:      189.20602 +/-     0.093
Long of Asc Node:      193.80561 +/-     0.000
Inclination:            16.29415 +/-     0.000
Eccentricity:         0.24717570 +/-    0.0001
Semi-Major Axis:     39.20420787 +/-    0.0028
Time of Perihelion: 2459542.7802 +/-      13.4
Perihelion:          29.51388016 +/-    0.0044
Aphelion:            48.89453558 +/-    0.0051
Period (y)              245.4750 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           29.48782159 +/-    0.0005
Ecliptic Y            3.75797514 +/-    0.0001
Ecliptic Z            0.99011901 +/-    0.0000
Ecliptic XDOT        -0.00058547 +/-    0.0000
Ecliptic YDOT         0.00332251 +/-    0.0000
Ecliptic ZDOT        -0.00098398 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   29.74280308 +/-    0.0005
Geocenter to KBO     29.86133955 +/-    0.0005
# Hcoef:  8.83

The following table shows the complete astrometric record for 15RU277. 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 (15RU277) followed by the observatory code and reference code for the source of the astrometry.

2015 06  23.51987  00 30 49.106  +05 23 39.61  23.7r 15RU277   568  C~2lVO      
2015 07  14.61234  00 31 15.067  +05 25 18.22  23.6r 15RU277   568  C~2lVO      
2015 07  19.59146  00 31 13.382  +05 24 50.47  23.7r 15RU277   568  C~2lVO      
2015 08  13.47989  00 30 22.654  +05 17 48.59  23.6r 15RU277   568  C~2lVO      
2015 08  13.50863  00 30 22.557  +05 17 48.12  24.1r 15RU277   568  C~2lVO      
2015 08  13.51279  00 30 22.529  +05 17 47.89  24.0r 15RU277   568  C~2lVO      
2015 08  13.53336  00 30 22.462  +05 17 47.38  23.1r 15RU277   568  C~2lVO      
2015 08  19.54254  00 30 00.568  +05 14 59.34  23.5r 15RU277   568  C~2lVO      
2015 08  19.58390  00 30 00.398  +05 14 58.40  23.5r 15RU277   568  C~2lVO      
2015 08  19.61259  00 30 00.274  +05 14 57.19  23.6r 15RU277   568  C~2lVO      
2015 08  20.41707  00 29 57.108  +05 14 33.07  23.6r 15RU277   568  C~2lVO      
2015 08  20.46647  00 29 56.909  +05 14 31.50  23.4r 15RU277   568  C~2lVO      
2015 09  07.56274  00 28 32.158  +05 03 50.58  23.7w 15RU277   568  C~2lVO      
2015 09  09.39169  00 28 22.441  +05 02 37.04  23.5r 15RU277   568  C~2lVO      
2015 09  09.43322  00 28 22.213  +05 02 35.36  23.5r 15RU277   568  C~2lVO      
2015 09  09.47414  00 28 21.986  +05 02 33.71  23.5r 15RU277   568  C~2lVO      
2015 09  10.46104  00 28 16.670  +05 01 53.41  23.8w 15RU277   568  C~2lVO      
2015 09  18.44606  00 27 32.072  +04 56 15.30  23.6w 15RU277   568  C~2lVO      
2015 10  08.33404  00 25 35.562  +04 41 16.91  23.7w 15RU277   568  C~2lVO      
2015 10  08.38665  00 25 35.261  +04 41 14.58  23.5w 15RU277   568  C~2lVO      
2015 10  09.30373  00 25 29.916  +04 40 32.62  23.5w 15RU277   568  C~2lVO      
2015 11  10.42944  00 22 46.393  +04 17 59.63  23.8w 15RU277   568  C~2lVO      
2015 12  08.22831  00 21 35.957  +04 05 28.30  23.8w 15RU277   568  C~2lVO      
2016 01  01.29102  00 21 50.551  +04 02 37.13  23.9w 15RU277   568  C~2lVO      
2016 09  06.53219  00 38 45.153  +05 22 32.22        15RU277   568  C~2lVO      
2016 09  06.57428  00 38 44.933  +05 22 30.58        15RU277   568  C~2lVO      
2016 09  27.48878  00 36 47.967  +05 07 38.16  23.8w 15RU277   568  C~2lVO      
2016 11  03.39726  00 33 21.768  +04 40 35.78  23.8w 15RU277   568  C~2lVO      
2016 11  03.46220  00 33 21.454  +04 40 33.23  23.9w 15RU277   568  C~2lVO      
2016 12  29.23783  00 31 37.197  +04 20 42.29  23.9w 15RU277   568  C~2lVO      
2017 01  03.20730  00 31 46.334  +04 20 54.04  23.8w 15RU277   568  C~2lVO      
2017 01  03.25288  00 31 46.433  +04 20 54.24  24.1w 15RU277   568  C~2lVO      
2017 01  27.23800  00 33 13.647  +04 26 32.84  23.9w 15RU277   568  C~2lVO      
2017 01  28.23385  00 33 18.723  +04 26 56.43  23.9w 15RU277   568  C~2lVO      
2017 01  30.24057  00 33 29.260  +04 27 46.09  23.8w 15RU277   568  C~2lVO      
2017 11  22.36455  00 42 15.302  +04 47 57.34  23.7w 15RU277   568  C~2lVO      
2017 12  23.29716  00 41 27.341  +04 38 44.58  23.9w 15RU277   568  C~2lVO      

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     0.08       0.00    -0.13
     2   0.0577    395.15    -0.04     -62.25     0.11
     3   0.0714    361.09    -0.04     -77.83     0.04
     4   0.1395   -501.49     0.12    -166.71    -0.17
     5   0.1396   -503.01     0.26    -166.57     0.07
     6   0.1396   -503.48     0.03    -166.62     0.04
     7   0.1397   -504.60     0.10    -166.69     0.03
     8   0.1561   -871.40     0.08    -192.04    -0.12
     9   0.1562   -874.10     0.16    -191.90     0.17
    10   0.1563   -876.28    -0.09    -192.28    -0.11
    11   0.1585   -929.26    -0.08    -195.78     0.05
    12   0.1586   -932.61    -0.07    -196.04    -0.04
    13   0.2082  -2349.03    -0.03    -284.76     0.03
    14   0.2132  -2511.49    -0.11    -294.93     0.05
    15   0.2133  -2515.28    -0.12    -295.12     0.05
    16   0.2134  -2519.05    -0.14    -295.30     0.07
    17   0.2161  -2607.96    -0.05    -300.92    -0.01
    18   0.2380  -3353.94    -0.02    -347.93    -0.00
    19   0.2924  -5309.69    -0.06    -483.49    -0.02
    20   0.2926  -5314.75     0.14    -483.85    -0.02
    21   0.2951  -5404.81     0.05    -490.72     0.04
    22   0.3831  -8189.31    -0.20    -762.90    -0.20
    23   0.4592  -9457.14     0.01   -1034.13     0.06
    24   0.5250  -9324.54     0.14   -1278.23     0.01
    25   1.2074   6513.55    -0.09   -2856.36     0.04
    26   1.2075   6509.88    -0.08   -2856.59     0.05
    27   1.2648   4551.19    -0.05   -2992.81     0.01
    28   1.3659   1078.83    -0.06   -3273.81     0.01
    29   1.3660   1073.51    -0.05   -3274.31     0.01
    30   1.5187   -828.82     0.01   -3755.16    -0.04
    31   1.5323   -698.56    -0.09   -3798.23    -0.03
    32   1.5325   -697.12    -0.01   -3798.63    -0.06
    33   1.5981    635.42    -0.05   -4001.16    -0.02
    34   1.6009    714.50     0.09   -4009.35    -0.03
    35   1.6064    878.94     0.19   -4025.72     0.01
    36   2.4171   8597.16     0.03   -5997.86     0.01
    37   2.5018   7719.64     0.05   -6226.62     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.

15RU277    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.602    39.613    39.591
ecceobj         0.255     0.255     0.254
incobj         16.235    16.235    16.235
qmin           29.081    29.061    28.835
qmax           50.612    50.626    50.875
amean          39.455    39.455    39.455
amin           38.917    38.913    38.886
amax           40.095    40.077    40.093
emean           0.238     0.237     0.241
emin            0.204     0.203     0.195
emax            0.263     0.264     0.270
imean          17.084    17.094    16.790
imin           16.082    16.085    15.626
imax           18.185    18.195    18.532
excite_mean     0.378     0.378     0.377
fracstop        1.000     1.000     1.000
cjmean          2.889     2.889     2.890

libcent 0       181.5     182.1     179.0
libamp  0       132.5     130.7     134.8
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       270.0     268.1     156.1
kozaiamp         66.5      63.5     180.0