Orbit Fit and Astrometric record for 518151

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: 518151    
# Created Thu Feb 21 02:07:08 2019
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   79 observations of   79
# Arc:   3.17y
# First observation: 2015/02/09
#  Last observation: 2018/04/13
# Chi-squared of fit:   280.37 DOF:  152 RMS:  0.33
# Min/Max residuals:    -1.38    1.41
# Exact a, adot, b, bdot, g, gdot:
 -6.205652E-06 -4.346779E-02  4.020056E-05  2.844048E-01  1.112873E-01  5.392019E-03
# Covariance matrix:
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
#      lat0       lon0       xBary       yBary       zBary        JD0
  -44.333476 -174.971534    0.694514   -0.486939   -0.498616  2457063.013598
# Heliocentric elements and errors
Epoch:              2457062.5000  =  2015/02/09
Mean Anomaly:            2.27159 +/-     0.000
Argument of Peri:      306.50014 +/-     0.000
Long of Asc Node:      176.37249 +/-     0.000
Inclination:            93.50989 +/-     0.000
Eccentricity:         0.61741114 +/-    0.0000
Semi-Major Axis:     24.68141263 +/-    0.0000
Time of Perihelion: 2456779.8939 +/-       0.0
Perihelion:           9.44283361 +/-    0.0000
Aphelion:            39.91999164 +/-    0.0000
Period (y)              122.6205 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           -7.16101776 +/-    0.0000
Ecliptic Y            0.06806630 +/-    0.0000
Ecliptic Z           -6.27929524 +/-    0.0000
Ecliptic XDOT        -0.00506276 +/-    0.0000
Ecliptic YDOT         0.00062286 +/-    0.0000
Ecliptic ZDOT         0.00491212 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO    9.52437923 +/-    0.0000
Geocenter to KBO      8.98576061 +/-    0.0000
# Hcoef: 10.28

The following table shows the complete astrometric record for 518151. 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 (518151) followed by the observatory code and reference code for the source of the astrometry.

2015 02  09.51282  10 51 13.887  -41 46 01.96  19.8i 518151    F51  C~2Y4v      
2015 02  09.53168  10 51 13.400  -41 45 59.65  19.8i 518151    F51  C~2Y4v      
2016 03  01.35174  11 12 42.60   -25 33 44.8   20.7r 518151    G45  C~1va2      
2016 03  01.35649  11 12 42.50   -25 33 43.1   20.4r 518151    G45  C~1va2      
2016 03  01.36780  11 12 42.25   -25 33 39.9   20.5r 518151    G45  C~1va2      
2016 03  01.37276  11 12 42.16   -25 33 38.8   20.4r 518151    G45  C~1va2      
2016 03  29.35363  11 02 30.694  -23 12 27.41  19.9r 518151    F51  C~1pSx      
2016 03  29.36394  11 02 30.491  -23 12 23.96  19.9r 518151    F51  C~1pSx      
2016 03  29.37425  11 02 30.292  -23 12 20.31  19.8r 518151    F51  C~1pSx      
2016 03  29.38459  11 02 30.071  -23 12 16.82  19.9r 518151    F51  C~1pSx      
2016 03  31.21672  11 01 54.23   -23 01 48.0   20.7V 518151    691  C~1pSx      
2016 03  31.22249  11 01 54.07   -23 01 46.2   20.7V 518151    691  C~1pSx      
2016 03  31.22827  11 01 53.98   -23 01 43.7   20.9V 518151    691  C~1pSx      
2016 03  31.26023  11 01 53.38   -23 01 33.3   20.5R 518151    926  C~1pSx      
2016 03  31.27502  11 01 53.08   -23 01 27.7   20.0R 518151    926  C~1pSx      
2016 03  31.28888  11 01 52.78   -23 01 22.4   20.2R 518151    926  C~1pSx      
2016 03  31.53871  11 01 47.97   -22 59 55.7         518151    Q62  C~1t4A      
2016 03  31.54324  11 01 47.89   -22 59 53.6         518151    Q62  C~1t4A      
2016 03  31.54776  11 01 47.81   -22 59 51.8   19.4w 518151    Q62  C~1t4A      
2016 04  01.18993  11 01 35.52   -22 56 11.1   20.1R 518151    926  C~1qBR      
2016 04  01.19047  11 01 35.54   -22 56 10.8   20.4V 518151    I52  C~1pSx      
2016 04  01.19632  11 01 35.40   -22 56 09.6   20.2R 518151    926  C~1qBR      
2016 04  01.20171  11 01 35.32   -22 56 06.9   20.1V 518151    I52  C~1pSx      
2016 04  01.20390  11 01 35.26   -22 56 06.3   20.4R 518151    926  C~1qBR      
2016 04  01.21028  11 01 35.10   -22 56 04.0   20.2R 518151    926  C~1qBR      
2016 04  01.21294  11 01 34.98   -22 56 01.5         518151    I52  C~1pSx      
2016 04  01.21781  11 01 34.97   -22 56 01.4   20.2R 518151    926  C~1qBR      
2016 04  01.22420  11 01 34.80   -22 55 57.8   20.5R 518151    926  C~1qBR      
2016 04  01.22504  11 01 34.82   -22 55 58.3   20.1V 518151    I52  C~1pSx      
2016 04  01.31377  11 01 33.11   -22 55 27.6   20.2V 518151    691  C~1pSx      
2016 04  01.32432  11 01 32.96   -22 55 23.8   20.5V 518151    691  C~1pSx      
2016 04  01.33487  11 01 32.70   -22 55 20.8   20.7V 518151    691  C~1pSx      
2016 04  05.16977  11 00 21.55   -22 32 58.5   20.5r 518151    G45  C~1qnz      
2016 04  05.17445  11 00 21.47   -22 32 56.7   20.7r 518151    G45  C~1qnz      
2016 04  05.17880  11 00 21.43   -22 32 55.4   20.2r 518151    G45  C~1qnz      
2016 04  05.18318  11 00 21.35   -22 32 54.0   20.3r 518151    G45  C~1qnz      
2016 04  05.18769  11 00 21.26   -22 32 51.9   20.2r 518151    G45  C~1qnz      
2016 04  05.19247  11 00 21.19   -22 32 50.3   19.9r 518151    G45  C~1qnz      
2016 04  12.32913  10 58 20.170  -21 50 28.32  20.1r 518151    F51  C~1rRt      
2016 04  12.33947  10 58 20.000  -21 50 24.64  20.1r 518151    F51  C~1rRt      
2016 04  12.34980  10 58 19.840  -21 50 20.92  20.0r 518151    F51  C~1rRt      
2016 04  12.36016  10 58 19.680  -21 50 17.26  20.3r 518151    F51  C~1rRt      
2017 01  30.54032  11 43 18.148  -13 09 19.48  20.4w 518151    F51  C~2Fad      
2017 01  30.55195  11 43 17.984  -13 09 17.54  20.5w 518151    F51  C~2Fad      
2017 01  30.56358  11 43 17.826  -13 09 15.77  20.6w 518151    F51  C~2Fad      
2017 01  30.57519  11 43 17.669  -13 09 13.83  20.5w 518151    F51  C~2Fad      
2017 02  26.64995  11 35 42.61   -11 36 35.5   19.7R 518151    Q62  C~29Em      
2017 02  26.66949  11 35 42.19   -11 36 30.7         518151    Q62  C~29Em      
2017 02  27.63840  11 35 23.39   -11 32 31.5         518151    Q62  C~29Em      
2017 02  27.66713  11 35 22.80   -11 32 24.2         518151    Q62  C~29Em      
2017 03  02.24925  11 34 32.12   -11 21 38.4   20.6r 518151    G45  C~29Em      
2017 03  02.25421  11 34 32.07   -11 21 37.3   20.8r 518151    G45  C~29Em      
2017 03  02.26386  11 34 31.85   -11 21 34.8   20.3r 518151    G45  C~29Em      
2017 03  02.26886  11 34 31.76   -11 21 34.0   20.4r 518151    G45  C~29Em      
2017 03  02.27376  11 34 31.65   -11 21 32.6   20.3r 518151    G45  C~29Em      
2017 03  19.34532  11 28 49.44   -10 04 39.6   19.9V 518151    G96  C~2B0K      
2017 03  19.34956  11 28 49.35   -10 04 38.3   20.3V 518151    G96  C~2B0K      
2017 03  19.35380  11 28 49.27   -10 04 37.3   20.5V 518151    G96  C~2B0K      
2017 03  19.35803  11 28 49.19   -10 04 36.0   20.1V 518151    G96  C~2B0K      
2017 03  25.26059  11 26 53.19   -09 36 25.3   20.1V 518151    691  C~2BoD      
2017 03  25.27147  11 26 52.96   -09 36 22.3   20.1V 518151    691  C~2BoD      
2017 03  25.28236  11 26 52.75   -09 36 19.0   20.1V 518151    691  C~2BoD      
2018 03  10.40287  11 49 54.214  +01 42 22.77  20.4w 518151    F51  C~2Ztg      
2018 03  10.41462  11 49 53.997  +01 42 25.68  20.4w 518151    F51  C~2Ztg      
2018 03  10.43831  11 49 53.543  +01 42 31.71  20.2w 518151    F51  C~2Ztg      
2018 03  13.65995  11 48 53.84   +01 56 04.9   20.6R 518151    D29  C~2Ztg      
2018 03  13.67498  11 48 53.61   +01 56 08.6   20.7R 518151    D29  C~2Ztg      
2018 03  13.69000  11 48 53.33   +01 56 12.9   20.9R 518151    D29  C~2Ztg      
2018 03  19.35594  11 47 07.80   +02 20 03.6   20.2G 518151    G96  C~2aIg      
2018 03  19.36207  11 47 07.68   +02 20 04.8   20.2G 518151    G96  C~2aIg      
2018 03  19.36722  11 47 07.58   +02 20 06.4   20.3G 518151    G96  C~2aIg      
2018 03  19.37238  11 47 07.49   +02 20 07.8   20.0G 518151    G96  C~2aIg      
2018 04  11.24098  11 40 23.13   +03 52 40.1   20.4V 518151    691  C~2bHh      
2018 04  11.25189  11 40 22.92   +03 52 42.5   20.4V 518151    691  C~2bHh      
2018 04  11.26273  11 40 22.74   +03 52 45.0   20.6V 518151    691  C~2bHh      
2018 04  13.30816  11 39 50.161  +04 00 29.04  20.5w 518151    F51  C~2bHh      
2018 04  13.31951  11 39 49.974  +04 00 31.61  20.5w 518151    F51  C~2bHh      
2018 04  13.33091  11 39 49.795  +04 00 34.13  20.5w 518151    F51  C~2bHh      
2018 04  13.34232  11 39 49.612  +04 00 36.65  20.6w 518151    F51  C~2bHh      

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     0.04       0.00     0.03
  2   0.0001      0.00    -0.06       0.00    -0.11
  3   1.0564      0.00    -0.36       0.00    -0.55
  4   1.0564      0.00    -0.22       0.00    -0.05
  5   1.0564      0.00    -0.08       0.00     0.28
  6   1.0564      0.00     0.28       0.00     0.12
  7   1.1330      0.00    -0.06       0.00     0.05
  8   1.1331      0.00     0.02       0.00    -0.02
  9   1.1331      0.00     0.16       0.00     0.11
 10   1.1331      0.00    -0.02       0.00     0.06
 11   1.1381      0.00     0.03       0.00    -0.37
 12   1.1382      0.00    -0.66       0.00    -0.56
 13   1.1382      0.00    -0.30       0.00    -0.05
 14   1.1383      0.00     0.17       0.00    -0.69
 15   1.1383      0.00     0.04       0.00    -0.20
 16   1.1383      0.00    -0.36       0.00     0.31
 17   1.1390      0.00    -0.33       0.00    -0.23
 18   1.1390      0.00    -0.19       0.00     0.30
 19   1.1390      0.00    -0.06       0.00     0.54
 20   1.1408      0.00    -0.00       0.00    -0.23
 21   1.1408      0.00     0.46       0.00    -0.11
 22   1.1408      0.00     0.06       0.00    -0.94
 23   1.1408      0.00     0.44       0.00    -0.10
 24   1.1408      0.00     0.18       0.00    -0.27
 25   1.1409      0.00    -0.36       0.00    -0.18
 26   1.1409      0.00    -1.38       0.00     1.41
 27   1.1409      0.00    -0.11       0.00    -0.19
 28   1.1409      0.00    -0.79       0.00     1.19
 29   1.1409      0.00    -0.24       0.00     0.41
 30   1.1411      0.00    -0.01       0.00     0.29
 31   1.1412      0.00     0.81       0.00     0.42
 32   1.1412      0.00    -0.02       0.00    -0.25
 33   1.1517      0.00    -0.18       0.00    -0.04
 34   1.1517      0.00    -0.09       0.00     0.11
 35   1.1517      0.00     0.51       0.00    -0.12
 36   1.1517      0.00     0.52       0.00    -0.26
 37   1.1517      0.00     0.41       0.00     0.25
 38   1.1518      0.00     0.68       0.00     0.17
 39   1.1713      0.00     0.04       0.00     0.02
 40   1.1713      0.00     0.01       0.00    -0.01
 41   1.1714      0.00     0.12       0.00     0.00
 42   1.1714      0.00     0.24       0.00    -0.06
 43   1.9741      0.00    -0.04       0.00     0.12
 44   1.9741      0.00    -0.11       0.00     0.17
 45   1.9741      0.00    -0.08       0.00     0.06
 46   1.9742      0.00    -0.05       0.00     0.11
 47   2.0483      0.00     0.03       0.00    -0.84
 48   2.0483      0.00    -0.49       0.00    -0.82
 49   2.0510      0.00     0.11       0.00     0.01
 50   2.0511      0.00    -0.18       0.00     0.20
 51   2.0581      0.00    -0.19       0.00     0.26
 52   2.0582      0.00     0.55       0.00     0.10
 53   2.0582      0.00     0.16       0.00     0.16
 54   2.0582      0.00     0.31       0.00    -0.30
 55   2.0582      0.00     0.14       0.00    -0.15
 56   2.1049      0.00     0.19       0.00     0.12
 57   2.1050      0.00     0.13       0.00     0.22
 58   2.1050      0.00     0.21       0.00     0.01
 59   2.1050      0.00     0.30       0.00     0.11
 60   2.1211      0.00     0.00       0.00     0.04
 61   2.1212      0.00    -0.23       0.00    -0.10
 62   2.1212      0.00    -0.17       0.00     0.05
 63   3.0798      0.00    -0.15       0.00     0.04
 64   3.0798      0.00    -0.10       0.00    -0.01
 65   3.0799      0.00    -0.23       0.00     0.04
 66   3.0887      0.00    -0.48       0.00    -0.17
 67   3.0887      0.00     0.33       0.00    -0.27
 68   3.0888      0.00     0.38       0.00     0.23
 69   3.1043      0.00    -0.02       0.00     0.04
 70   3.1043      0.00    -0.09       0.00    -0.30
 71   3.1043      0.00    -0.13       0.00    -0.00
 72   3.1043      0.00    -0.02       0.00     0.10
 73   3.1669      0.00     0.38       0.00     0.28
 74   3.1670      0.00    -0.08       0.00     0.19
 75   3.1670      0.00    -0.11       0.00     0.21
 76   3.1726      0.00    -0.03       0.00    -0.01
 77   3.1726      0.00    -0.10       0.00     0.00
 78   3.1727      0.00    -0.04       0.00    -0.04
 79   3.1727      0.00    -0.03       0.00    -0.09

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.

518151    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        24.592    24.592    24.593
ecceobj         0.616     0.616     0.616
incobj         93.412    93.412    93.412
qmin            9.426     8.675     9.425
qmax           40.511    41.043    40.306
amean          24.738    24.534    24.727
amin           24.499    24.282    24.500
amax           25.041    24.934    24.975
emean           0.613     0.612     0.611
emin            0.609     0.593     0.605
emax            0.618     0.648     0.618
imean          92.838    92.915    92.839
imin           92.663    92.616    92.579
imax           93.059    93.172    93.081
excite_mean     1.172     1.171     1.171
fracstop        0.006     0.032     0.006
cjmean          1.163     1.169     1.163

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       298.7     262.1     299.1
kozaiamp          7.9      42.3       7.4