Orbit Fit and Astrometric record for 15RF277

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: 15RF277   
# Created Thu Dec  9 02:13:25 2021
# Orbit generated from Bernstein formalism
# Fitting     25 observations of     25
# Arc:   1.53y
# First observation: 2015/07/19
#  Last observation: 2017/01/28
Preliminary a, adot, b, bdot, g, gdot:
   0.003476   0.227963  -0.000057  -0.001726   0.102693   0.000000
# Chi-squared of fit:    12.37 DOF:     44 RMS:  0.12
# Min/Max residuals:    -0.34    0.31
# Exact a, adot, b, bdot, g, gdot:
  3.635675E-05  2.275214E-01 -2.743325E-07 -1.893227E-03  9.752555E-02  4.431331E-02
# Covariance matrix:
  2.2411E-13  1.2435E-12 -8.3378E-16 -1.3166E-14  4.9453E-13  5.6253E-12
  1.2435E-12  7.1110E-11  1.2911E-14 -7.5737E-13  2.0798E-11  3.0741E-10
 -8.3378E-16  1.2911E-14  1.1435E-13 -1.1026E-13  2.5329E-15  5.9114E-14
 -1.3166E-14 -7.5737E-13 -1.1026E-13  2.1658E-13 -2.2066E-13 -3.2875E-12
  4.9453E-13  2.0798E-11  2.5329E-15 -2.2066E-13  6.2140E-12  8.9893E-11
  5.6253E-12  3.0741E-10  5.9114E-14 -3.2875E-12  8.9893E-11  1.3336E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.869829   10.399141    0.977629    0.004385   -0.282189  2457223.011629
# Heliocentric elements and errors
Epoch:              2457220.5000  =  2015/07/17
Mean Anomaly:            4.57504 +/-     0.006
Argument of Peri:       97.88908 +/-     0.024
Long of Asc Node:      250.44272 +/-     0.006
Inclination:             0.92806 +/-     0.000
Eccentricity:         0.51789793 +/-    0.0001
Semi-Major Axis:     21.62252355 +/-    0.0034
Time of Perihelion: 2456753.7864 +/-       0.6
Perihelion:          10.42426339 +/-    0.0028
Aphelion:            32.82078370 +/-    0.0056
Period (y)              100.5467 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           10.53464939 +/-    0.0003
Ecliptic Y            0.94005240 +/-    0.0000
Ecliptic Z            0.15570940 +/-    0.0000
Ecliptic XDOT         0.00006906 +/-    0.0000
Ecliptic YDOT         0.00650070 +/-    0.0000
Ecliptic ZDOT        -0.00003420 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   10.57765483 +/-    0.0003
Geocenter to KBO     10.25372302 +/-    0.0003
# Hcoef: 14.67

The following table shows the complete astrometric record for 15RF277. 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 (15RF277) followed by the observatory code and reference code for the source of the astrometry.

2015 07  19.51084  00 36 51.624  +04 55 02.82  24.9r 15RF277   568  C~2ji9      
2015 08  11.49932  00 36 10.129  +04 52 08.53  24.9r 15RF277   568  C~2ji9      
2015 08  11.55875  00 36 09.766  +04 52 06.51  26.6r 15RF277   568  C~2ji9      
2015 09  08.39679  00 31 54.960  +04 26 05.35  24.5r 15RF277   568  C~2ji9      
2015 09  08.50096  00 31 53.669  +04 25 57.29  24.6r 15RF277   568  C~2ji9      
2015 09  08.54456  00 31 53.121  +04 25 53.79  24.9r 15RF277   568  C~2ji9      
2015 09  09.52009  00 31 41.115  +04 24 38.11  25.4w 15RF277   568  C~2ji9      
2015 09  10.46103  00 31 29.401  +04 23 24.04  25.2w 15RF277   568  C~2ji9      
2015 09  16.44783  00 30 11.869  +04 15 11.04  24.3w 15RF277   568  C~2ji9      
2015 10  07.33325  00 25 21.608  +03 43 48.78  24.5r 15RF277   568  C~2ji9      
2015 10  07.39133  00 25 20.781  +03 43 43.59  25.2r 15RF277   568  C~2ji9      
2015 11  07.21826  00 19 14.200  +03 02 28.92  25.0w 15RF277   568  C~2ji9      
2015 11  07.27071  00 19 13.724  +03 02 25.73  25.5w 15RF277   568  C~2ji9      
2015 11  08.31542  00 19 04.688  +03 01 22.12  25.4w 15RF277   568  C~2ji9      
2015 11  10.34785  00 18 47.974  +02 59 23.78  24.9w 15RF277   568  C~2ji9      
2015 12  07.29452  00 17 06.994  +02 45 55.42  25.1w 15RF277   568  C~2jiA      
2016 01  01.22912  00 19 13.967  +02 57 03.17  25.7w 15RF277   568  C~2jiA      
2016 09  05.52849  01 22 03.103  +09 28 48.31  25.4w 15RF277   568  C~2jiA      
2016 09  07.46799  01 21 44.803  +09 27 02.56  25.7w 15RF277   568  C~2jiA      
2016 09  07.51408  01 21 44.355  +09 27 00.00  25.2w 15RF277   568  C~2jiA      
2016 09  26.54469  01 18 03.334  +09 05 16.51  25.1w 15RF277   568  C~2jiA      
2016 12  29.30079  01 04 45.521  +07 38 55.14  25.6w 15RF277   568  C~2jiA      
2017 01  02.33619  01 05 04.116  +07 40 26.80  25.6w 15RF277   568  C~2jiA      
2017 01  27.23065  01 08 57.059  +08 02 00.83  24.9w 15RF277   568  C~2jiA      
2017 01  28.22691  01 09 10.328  +08 03 16.70  26.2w 15RF277   568  C~2jiA      

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     0.11       0.00    -0.01
     2   0.0629   -638.77     0.08      83.32    -0.00
     3   0.0631   -644.56    -0.23      83.60    -0.05
     4   0.1393  -4761.87    -0.18     148.01     0.18
     5   0.1396  -4782.80     0.04     148.22     0.03
     6   0.1397  -4791.72    -0.01     148.23    -0.09
     7   0.1424  -4986.67    -0.01     149.49     0.04
     8   0.1450  -5176.99    -0.06     150.53     0.14
     9   0.1614  -6438.10     0.17     155.20    -0.02
    10   0.2185 -11180.59    -0.03     144.31    -0.02
    11   0.2187 -11194.05     0.04     144.45     0.08
    12   0.3031 -17243.50    -0.13      51.58    -0.03
    13   0.3032 -17251.37    -0.10      51.49     0.00
    14   0.3061 -17401.90    -0.01      46.93    -0.14
    15   0.3117 -17680.68     0.22      37.87    -0.25
    16   0.3854 -19404.02     0.14    -102.49     0.04
    17   0.4537 -17377.15    -0.02    -246.98     0.15
    18   1.1335  44213.65     0.12    -256.30    -0.05
    19   1.1388  43909.71    -0.10    -254.33    -0.05
    20   1.1390  43902.28     0.11    -254.25    -0.12
    21   1.1911  40233.60    -0.03    -249.59    -0.01
    22   1.4477  26967.79     0.31    -594.65     0.17
    23   1.4588  27263.34    -0.34    -615.24     0.02
    24   1.5270  31030.78     0.13    -732.26     0.06
    25   1.5297  31246.73    -0.20    -736.63    -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.

15RF277    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        21.632    21.701    21.564
ecceobj         0.520     0.521     0.519
incobj          0.931     0.931     0.931
qmin           10.213    10.389     9.936
qmax           39.510    33.341    32.780
amean          23.468    21.792    20.982
amin           21.632    21.701    20.521
amax           24.861    21.883    21.565
emean           0.557     0.522     0.517
emin            0.520     0.521     0.508
emax            0.589     0.524     0.535
imean           2.326     2.377     3.059
imin            2.217     2.366     2.329
imax            2.501     2.387     4.410
excite_mean     0.559     0.524     0.520
fracstop        0.000     0.000     0.000
cjmean          2.750     2.830     2.863

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       135.7     103.4     141.9
kozaiamp         32.4       5.3      37.6