Orbit Fit and Astrometric record for 01XR254

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: 01XR254   
# Created Thu May 23 01:07:57 2019
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting  112 observations of  112
# Arc:  16.10y
# First observation: 2001/12/10
#  Last observation: 2018/01/16
# Chi-squared of fit:   525.41 DOF:  218 RMS:  0.38
# Min/Max residuals:    -1.44    1.01
# Exact a, adot, b, bdot, g, gdot:
  1.668224E-05  2.148306E-02  2.570388E-06  9.185587E-05  2.307593E-02 -1.179221E-04
# Covariance matrix:
  1.0415E-13 -2.2063E-14  2.5508E-16 -8.0123E-17 -9.7360E-15 -4.6649E-14
 -2.2063E-14  7.1455E-15 -1.1174E-16  3.0847E-17  5.6267E-15  1.7650E-14
  2.5508E-16 -1.1174E-16  5.8168E-14 -4.6921E-15 -3.5189E-16 -2.6298E-16
 -8.0123E-17  3.0847E-17 -4.6921E-15  4.8232E-16  2.8156E-17  8.1440E-17
 -9.7360E-15  5.6267E-15 -3.5189E-16  2.8156E-17  3.9801E-14  1.0410E-14
 -4.6649E-14  1.7650E-14 -2.6298E-16  8.1440E-17  1.0410E-14  4.7331E-14
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.236124  101.319162    0.378228   -0.019559   -0.902745  2452254.078693
# Heliocentric elements and errors
Epoch:              2452254.5000  =  2001/12/11
Mean Anomaly:          211.99667 +/-     0.034
Argument of Peri:       70.71993 +/-     0.032
Long of Asc Node:      179.63836 +/-     0.003
Inclination:             1.23402 +/-     0.000
Eccentricity:         0.02588541 +/-    0.0000
Semi-Major Axis:     43.28656623 +/-    0.0014
Time of Perihelion: 2495020.3503 +/-      10.2
Perihelion:          42.16607588 +/-    0.0016
Aphelion:            44.40705658 +/-    0.0017
Period (y)              284.7986 +/-      0.01
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           -8.30893981 +/-    0.0001
Ecliptic Y           43.44748093 +/-    0.0004
Ecliptic Z           -0.93475469 +/-    0.0000
Ecliptic XDOT        -0.00250518 +/-    0.0000
Ecliptic YDOT        -0.00051380 +/-    0.0000
Ecliptic ZDOT         0.00001141 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   44.24473533 +/-    0.0004
Geocenter to KBO     43.33523122 +/-    0.0004
# Hcoef:  5.82

The following table shows the complete astrometric record for 01XR254. 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 (01XR254) followed by the observatory code and reference code for the source of the astrometry.

2001 12  10.57795  06 48 46.70   +21 43 31.0         01XR254   568  Ce7056      
2001 12  10.60115  06 48 46.60   +21 43 31.0         01XR254   568  Ce7056      
2001 12  10.62681  06 48 46.46   +21 43 31.1         01XR254   568  Ce7056      
2002 01  08.52922  06 46 22.74   +21 46 10.5   21.6R 01XR254   568  Ce7056      
2002 01  08.55399  06 46 22.62   +21 46 10.6   21.6R 01XR254   568  Ce7056      
2002 02  07.37434  06 44 06.58   +21 49 00.5   21.7R 01XR254   568  Cf2430      
2002 02  07.41451  06 44 06.42   +21 49 00.7         01XR254   568  Cf2430      
2002 03  12.34701  06 42 43.51   +21 51 14.7   21.7R 01XR254   568  Cf2430      
2002 03  13.30124  06 42 42.54   +21 51 17.6   21.8R 01XR254   568  Cf2430      
2002 10  31.48763  06 56 17.35   +21 35 07.5   21.9R 01XR254   568  Cg5849      
2002 11  01.51091  06 56 15.60   +21 35 08.3   21.8R 01XR254   568  Cg5849      
2002 11  05.54752  06 56 07.73   +21 35 13.3   21.7R 01XR254   568  Cl8351      
2002 11  06.54390  06 56 05.56   +21 35 14.5         01XR254   568  Cl8351      
2002 11  06.61618  06 56 05.39   +21 35 14.7         01XR254   568  Cl8351      
2005 12  23.39350  07 08 54.85   +21 16 24.7   22.0R 01XR254   568  Cp7668      
2005 12  23.44723  07 08 54.54   +21 16 24.8         01XR254   568  Cp7668      
2006 12  20.27161  07 14 26.79   +21 07 22.4   22.2R 01XR254   250  S~06AS      
2006 12  20.27601  07 14 26.77   +21 07 22.4         01XR254   250  S~06AS      
2006 12  20.28040  07 14 26.75   +21 07 22.4         01XR254   250  S~06AS      
2006 12  20.28480  07 14 26.73   +21 07 22.5         01XR254   250  S~06AS      
2007 02  15.16792  07 09 58.69   +21 15 28.0         01XR254   688  Cu2303      
2007 02  15.26559  07 09 58.31   +21 15 28.7         01XR254   688  Cu2303      
2007 09  17.43098  07 21 31.29   +20 56 38.9   22.8R 01XR254   250  S~06AS      
2007 09  17.43862  07 21 31.31   +20 56 38.9         01XR254   250  S~06AS      
2007 09  17.49348  07 21 31.48   +20 56 38.5         01XR254   250  S~06AS      
2007 09  17.50112  07 21 31.50   +20 56 38.4         01XR254   250  S~06AS      
2007 09  18.09210  07 21 33.31   +20 56 34.0         01XR254   250  S~06AS      
2007 09  18.09973  07 21 33.34   +20 56 34.0         01XR254   250  S~06AS      
2007 09  18.10807  07 21 33.36   +20 56 33.9         01XR254   250  S~06AS      
2007 09  18.11571  07 21 33.39   +20 56 33.8         01XR254   250  S~06AS      
2007 09  21.29973  07 21 42.62   +20 56 11.2         01XR254   250  S~06AS      
2007 09  21.30737  07 21 42.64   +20 56 11.1         01XR254   250  S~06AS      
2007 09  21.31501  07 21 42.66   +20 56 11.1         01XR254   250  S~06AS      
2007 09  21.35529  07 21 42.78   +20 56 10.8         01XR254   250  S~06AS      
2007 12  05.35518  07 20 47.36   +20 56 12.0         01XR254   250  S~06AS      
2007 12  05.36143  07 20 47.34   +20 56 12.1         01XR254   250  S~06AS      
2007 12  05.37601  07 20 47.28   +20 56 12.2         01XR254   250  S~06AS      
2007 12  05.42115  07 20 47.10   +20 56 12.5         01XR254   250  S~06AS      
2007 12  05.43087  07 20 47.06   +20 56 12.6         01XR254   250  S~06AS      
2007 12  05.43990  07 20 47.03   +20 56 12.6         01XR254   250  S~06AS      
2007 12  05.44754  07 20 47.00   +20 56 12.7         01XR254   250  S~06AS      
2007 12  05.48643  07 20 46.85   +20 56 12.9         01XR254   250  S~06AS      
2007 12  28.59696  07 19 02.71   +20 59 19.1         01XR254   250  S~06AS      
2007 12  28.60529  07 19 02.66   +20 59 19.1         01XR254   250  S~06AS      
2007 12  28.61293  07 19 02.63   +20 59 19.2         01XR254   250  S~06AS      
2007 12  28.62057  07 19 02.59   +20 59 19.3         01XR254   250  S~06AS      
2009 02  26.13664  07 19 47.03   +20 59 00.4   22.4R 01XR254   688  C~04pJ      
2009 02  26.23481  07 19 46.73   +20 59 01.0         01XR254   688  C~04pJ      
2011 01  25.31801  07 32 26.838  +20 33 24.18  21.9G 01XR254   F51  C~2r79      
2011 01  25.33085  07 32 26.744  +20 33 24.26  22.2G 01XR254   F51  C~2r79      
2011 01  25.34633  07 32 26.687  +20 33 24.02  22.3G 01XR254   F51  C~2r79      
2011 01  25.35982  07 32 26.621  +20 33 24.20  21.9G 01XR254   F51  C~2r79      
2011 04  16.23990  07 29 21.166  +20 41 56.58  22.1G 01XR254   F51  C~2r79      
2013 01  17.47539  07 43 31.597  +20 08 34.81  22.1G 01XR254   F51  C~2r79      
2013 01  17.49066  07 43 31.517  +20 08 34.85  21.5G 01XR254   F51  C~2r79      
2013 01  17.50597  07 43 31.449  +20 08 35.12  21.7G 01XR254   F51  C~2r79      
2013 01  17.52138  07 43 31.378  +20 08 35.19  21.6G 01XR254   F51  C~2r79      
2013 02  10.40745  07 41 38.291  +20 13 26.82  22.4G 01XR254   F51  C~2r79      
2013 02  10.42279  07 41 38.223  +20 13 26.97  22.1G 01XR254   F51  C~2r79      
2013 02  10.43827  07 41 38.165  +20 13 27.17  22.1G 01XR254   F51  C~2r79      
2013 02  10.45370  07 41 38.083  +20 13 27.25  22.0G 01XR254   F51  C~2r79      
2013 12  15.56969  07 51 21.108  +19 49 17.65  22.2G 01XR254   F51  C~2r79      
2013 12  31.53541  07 50 10.065  +19 52 17.23  21.7G 01XR254   F51  C~2r79      
2013 12  31.55132  07 50 09.991  +19 52 17.47  21.8G 01XR254   F51  C~2r79      
2013 12  31.56585  07 50 09.931  +19 52 17.36  22.1G 01XR254   F51  C~2r79      
2013 12  31.58044  07 50 09.831  +19 52 17.33  22.2G 01XR254   F51  C~2r79      
2014 11  26.49002  07 57 37.740  +19 33 08.64  22.3G 01XR254   F51  C~2r79      
2015 01  13.34759  07 54 22.002  +19 41 41.15  21.9G 01XR254   F51  C~2r79      
2015 01  13.36113  07 54 21.936  +19 41 41.39  21.9G 01XR254   F51  C~2r79      
2015 01  13.37462  07 54 21.873  +19 41 41.60  22.3G 01XR254   F51  C~2r79      
2015 01  13.38814  07 54 21.801  +19 41 41.66  21.9G 01XR254   F51  C~2r79      
2015 02  20.24109  07 51 25.875  +19 49 57.75  22.4G 01XR254   F51  C~2r79      
2015 02  20.25423  07 51 25.823  +19 49 58.17  22.3G 01XR254   F51  C~2r79      
2015 02  20.26733  07 51 25.755  +19 49 58.42  22.4G 01XR254   F51  C~2r79      
2015 02  20.28051  07 51 25.700  +19 49 58.55  22.1G 01XR254   F51  C~2r79      
2016 02  05.28880  07 57 43.859  +19 33 12.66  22.4G 01XR254   F51  C~2r79      
2016 02  05.30305  07 57 43.796  +19 33 12.87  22.2G 01XR254   F51  C~2r79      
2016 02  05.31733  07 57 43.716  +19 33 12.95  22.2G 01XR254   F51  C~2r79      
2016 02  05.33188  07 57 43.654  +19 33 13.27  22.2G 01XR254   F51  C~2r79      
2016 02  10.28579  07 57 20.967  +19 34 20.33  22.3G 01XR254   F51  C~2r79      
2016 02  10.29892  07 57 20.911  +19 34 20.59  22.1G 01XR254   F51  C~2r79      
2016 02  10.31213  07 57 20.855  +19 34 20.74  22.1G 01XR254   F51  C~2r79      
2016 02  10.32564  07 57 20.786  +19 34 20.93  22.6G 01XR254   F51  C~2r79      
2016 02  11.27734  07 57 16.543  +19 34 33.50  21.6G 01XR254   F51  C~2r79      
2016 02  11.28899  07 57 16.500  +19 34 33.67  21.8G 01XR254   F51  C~2r79      
2016 02  11.30090  07 57 16.449  +19 34 33.92  21.8G 01XR254   F51  C~2r79      
2016 02  11.31254  07 57 16.398  +19 34 34.05  22.0G 01XR254   F51  C~2r79      
2016 03  13.14435  07 55 27.38   +19 40 12.9   22.3R 01XR254   G37  C~1pPc      
2016 03  13.24127  07 55 27.14   +19 40 13.7         01XR254   G37  C~1pPc      
2016 04  02.27419  07 54 56.465  +19 42 09.24  22.4G 01XR254   F51  C~2r79      
2016 04  02.28677  07 54 56.452  +19 42 09.30  22.6G 01XR254   F51  C~2r79      
2016 04  02.29942  07 54 56.431  +19 42 09.42  22.4G 01XR254   F51  C~2r79      
2016 04  02.31210  07 54 56.435  +19 42 09.42  23.1G 01XR254   F51  C~2r79      
2016 04  21.24348  07 55 02.042  +19 42 25.39  22.2G 01XR254   F51  C~2r79      
2016 11  08.54518  08 08 23.745  +19 03 26.04  21.9G 01XR254   F51  C~2r79      
2016 11  08.55745  08 08 23.736  +19 03 25.84  22.2G 01XR254   F51  C~2r79      
2016 11  08.56979  08 08 23.721  +19 03 25.96  22.0G 01XR254   F51  C~2r79      
2016 11  08.58216  08 08 23.706  +19 03 25.95  22.3G 01XR254   F51  C~2r79      
2017 01  05.36372  08 05 22.485  +19 11 40.97  22.0G 01XR254   F51  C~2r79      
2017 01  05.41378  08 05 22.247  +19 11 41.71  21.8G 01XR254   F51  C~2r79      
2017 01  05.43363  08 05 22.154  +19 11 41.84  21.6G 01XR254   F51  C~2r79      
2017 02  27.26253  08 01 20.032  +19 24 01.07  21.9G 01XR254   F51  C~2r79      
2017 12  12.47965  08 12 14.474  +18 51 37.60  20.9G 01XR254   F51  C~2r79      
2017 12  12.50408  08 12 14.395  +18 51 37.88  21.5G 01XR254   F51  C~2r79      
2017 12  12.51617  08 12 14.357  +18 51 37.96  21.2G 01XR254   F51  C~2r79      
2017 12  23.57750  08 11 31.324  +18 53 45.05  22.5G 01XR254   F51  C~2r79      
2017 12  23.58940  08 11 31.270  +18 53 45.19  22.4G 01XR254   F51  C~2r79      
2017 12  23.60135  08 11 31.216  +18 53 45.34  22.6G 01XR254   F51  C~2r79      
2017 12  23.61330  08 11 31.174  +18 53 45.36  22.0G 01XR254   F51  C~2r79      
2018 01  16.34592  08 09 41.022  +18 59 20.98  22.5G 01XR254   F51  C~2r79      
2018 01  16.35757  08 09 40.969  +18 59 21.26  22.6G 01XR254   F51  C~2r79      
2018 01  16.36919  08 09 40.912  +18 59 21.33  22.2G 01XR254   F51  C~2r79      

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    -0.48       0.00    -0.48
  2   0.0001      0.00    -0.34       0.00    -0.59
  3   0.0001      0.00    -0.64       0.00    -0.60
  4   0.0793      0.00    -0.43       0.00    -0.69
  5   0.0793      0.00    -0.34       0.00    -0.73
  6   0.1610      0.00    -0.24       0.00    -0.82
  7   0.1611      0.00    -0.29       0.00    -0.82
  8   0.2512      0.00     0.12       0.00    -1.44
  9   0.2539      0.00    -0.09       0.00    -1.15
 10   0.8896      0.00     0.54       0.00    -0.30
 11   0.8924      0.00     0.66       0.00    -0.35
 12   0.9034      0.00     0.67       0.00    -0.05
 13   0.9061      0.00     0.65       0.00    -0.35
 14   0.9063      0.00     0.60       0.00    -0.26
 15   4.0351      0.00    -0.16       0.00    -0.37
 16   4.0352      0.00    -0.81       0.00    -0.69
 17   5.0259      0.00     0.38       0.00     0.81
 18   5.0259      0.00     0.40       0.00     0.78
 19   5.0259      0.00     0.41       0.00     0.74
 20   5.0259      0.00     0.42       0.00     0.81
 21   5.1816      0.00     0.34       0.00    -0.44
 22   5.1819      0.00     0.15       0.00    -0.46
 23   5.7682      0.00     0.28       0.00     0.94
 24   5.7683      0.00     0.23       0.00     1.00
 25   5.7684      0.00     0.23       0.00     1.01
 26   5.7684      0.00     0.17       0.00     0.96
 27   5.7701      0.00     0.14       0.00     0.95
 28   5.7701      0.00     0.24       0.00     1.00
 29   5.7701      0.00     0.16       0.00     0.96
 30   5.7701      0.00     0.26       0.00     0.92
 31   5.7788      0.00     0.12       0.00     0.99
 32   5.7789      0.00     0.10       0.00     0.94
 33   5.7789      0.00     0.09       0.00     0.99
 34   5.7790      0.00     0.22       0.00     0.97
 35   5.9843      0.00    -0.15       0.00     0.21
 36   5.9843      0.00    -0.08       0.00     0.27
 37   5.9844      0.00    -0.12       0.00     0.27
 38   5.9845      0.00    -0.16       0.00     0.27
 39   5.9845      0.00    -0.19       0.00     0.31
 40   5.9846      0.00    -0.11       0.00     0.25
 41   5.9846      0.00    -0.11       0.00     0.30
 42   5.9847      0.00    -0.06       0.00     0.23
 43   6.0480      0.00    -0.35       0.00     0.56
 44   6.0480      0.00    -0.49       0.00     0.49
 45   6.0480      0.00    -0.37       0.00     0.52
 46   6.0480      0.00    -0.41       0.00     0.55
 47   7.2130      0.00     0.16       0.00    -0.19
 48   7.2133      0.00     0.21       0.00    -0.29
 49   9.1245      0.00     0.04       0.00     0.06
 50   9.1246      0.00    -0.42       0.00    -0.01
 51   9.1246      0.00    -0.12       0.00    -0.43
 52   9.1247      0.00    -0.11       0.00    -0.40
 53   9.3461      0.00    -0.08       0.00    -0.38
 54  11.1044      0.00    -0.05       0.00    -0.12
 55  11.1045      0.00    -0.09       0.00    -0.27
 56  11.1045      0.00     0.06       0.00    -0.19
 57  11.1046      0.00     0.16       0.00    -0.31
 58  11.1700      0.00     0.00       0.00    -0.06
 59  11.1700      0.00    -0.01       0.00    -0.09
 60  11.1700      0.00     0.14       0.00    -0.06
 61  11.1701      0.00    -0.07       0.00    -0.15
 62  12.0137      0.00    -0.16       0.00    -0.10
 63  12.0574      0.00     0.01       0.00    -0.08
 64  12.0574      0.00     0.05       0.00    -0.03
 65  12.0575      0.00     0.21       0.00    -0.32
 66  12.0575      0.00    -0.24       0.00    -0.52
 67  12.9607      0.00     0.07       0.00    -0.27
 68  13.0918      0.00    -0.08       0.00    -0.15
 69  13.0918      0.00    -0.05       0.00    -0.10
 70  13.0918      0.00     0.02       0.00    -0.07
 71  13.0919      0.00    -0.04       0.00    -0.20
 72  13.1955      0.00     0.16       0.00    -0.39
 73  13.1956      0.00     0.17       0.00    -0.13
 74  13.1956      0.00    -0.07       0.00    -0.03
 75  13.1956      0.00    -0.10       0.00    -0.05
 76  14.1539      0.00     0.04       0.00     0.02
 77  14.1539      0.00     0.11       0.00     0.03
 78  14.1540      0.00    -0.07       0.00    -0.09
 79  14.1540      0.00     0.03       0.00     0.02
 80  14.1676      0.00    -0.02       0.00    -0.14
 81  14.1676      0.00     0.03       0.00    -0.06
 82  14.1677      0.00     0.10       0.00    -0.08
 83  14.1677      0.00    -0.01       0.00    -0.08
 84  14.1703      0.00    -0.02       0.00    -0.15
 85  14.1703      0.00     0.12       0.00    -0.14
 86  14.1704      0.00     0.17       0.00    -0.05
 87  14.1704      0.00     0.19       0.00    -0.07
 88  14.2548      0.00    -0.08       0.00     0.12
 89  14.2551      0.00    -0.06       0.00     0.13
 90  14.3099      0.00     0.12       0.00    -0.12
 91  14.3099      0.00     0.06       0.00    -0.10
 92  14.3100      0.00    -0.13       0.00    -0.02
 93  14.3100      0.00     0.06       0.00    -0.06
 94  14.3618      0.00     0.33       0.00    -0.16
 95  14.9130      0.00    -0.05       0.00     0.17
 96  14.9130      0.00    -0.02       0.00    -0.04
 97  14.9131      0.00    -0.08       0.00     0.06
 98  14.9131      0.00    -0.13       0.00     0.03
 99  15.0713      0.00    -0.20       0.00    -0.08
100  15.0714      0.00    -0.14       0.00    -0.05
101  15.0715      0.00    -0.10       0.00    -0.20
102  15.2161      0.00    -0.10       0.00     0.24
103  16.0052      0.00    -0.22       0.00    -0.30
104  16.0053      0.00    -0.08       0.00    -0.27
105  16.0053      0.00     0.01       0.00    -0.32
106  16.0356      0.00     0.01       0.00     0.00
107  16.0356      0.00    -0.04       0.00    -0.00
108  16.0357      0.00    -0.08       0.00    -0.00
109  16.0357      0.00     0.06       0.00    -0.13
110  16.1007      0.00    -0.13       0.00    -0.08
111  16.1007      0.00    -0.05       0.00     0.02
112  16.1007      0.00    -0.04       0.00    -0.08

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.

01XR254    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.141    43.141    43.141
ecceobj         0.028     0.028     0.028
incobj          1.234     1.234     1.234
qmin           41.017    41.019    41.015
qmax           45.138    45.152    45.133
amean          43.009    43.009    43.009
amin           42.675    42.677    42.675
amax           43.341    43.341    43.340
emean           0.024     0.024     0.024
emin            0.005     0.005     0.005
emax            0.042     0.042     0.042
imean           2.660     2.660     2.660
imin            1.607     1.607     1.607
imax            3.401     3.401     3.401
excite_mean     0.053     0.053     0.053
fracstop        1.000     1.000     1.000
cjmean          3.086     3.086     3.086

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       176.2     176.1     176.2
kozaiamp        179.9     180.0     180.0