Orbit Fit and Astrometric record for 17WW14

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: 17WW14    
# Created Fri Dec  3 02:13:59 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     42 observations of     42
# Arc:   3.42y
# First observation: 2015/09/09
#  Last observation: 2019/02/08
# Chi-squared of fit:    47.82 DOF:     78 RMS:  0.19
# Min/Max residuals:    -0.71    0.50
# Exact a, adot, b, bdot, g, gdot:
  4.325452E-05  4.212677E-01 -4.646918E-06 -3.995407E-02  1.572800E-01 -2.096377E-01
# Covariance matrix:
  6.9192E-10 -2.4863E-06 -7.7011E-11  2.7021E-07  3.1696E-11 -1.8297E-06
 -2.4863E-06  9.2999E-03  2.7692E-07 -1.0106E-03 -1.1327E-07  6.8441E-03
 -7.7011E-11  2.7692E-07  9.1057E-12 -3.0137E-08 -3.5305E-12  2.0380E-07
  2.7021E-07 -1.0106E-03 -3.0137E-08  1.1095E-04  1.2310E-08 -7.4383E-04
  3.1696E-11 -1.1327E-07 -3.5305E-12  1.2310E-08  1.4545E-12 -8.3357E-08
 -1.8297E-06  6.8441E-03  2.0380E-07 -7.4383E-04 -8.3357E-08  5.0374E-03
#      lat0       lon0       xBary       yBary       zBary        JD0
   -3.673348  -21.499822   -0.136076   -0.064037   -0.999435  2457274.867559
# Heliocentric elements and errors
Epoch:              2457274.5000  =  2015/09/09
Mean Anomaly:          353.09994 +/-     0.002
Argument of Peri:      272.47681 +/-     0.000
Long of Asc Node:      127.58784 +/-     0.000
Inclination:             5.98136 +/-     0.000
Eccentricity:         0.74709473 +/-    0.0011
Semi-Major Axis:     22.79625496 +/-    0.0000
Time of Perihelion: 2458036.4812 +/-       0.2
Perihelion:           5.76529310 +/-    0.0259
Aphelion:            39.82721682 +/-    0.0259
Period (y)              108.8437 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X            6.88172218 +/-    0.0000
Ecliptic Y           -2.56626328 +/-    0.0000
Ecliptic Z           -0.40735054 +/-    0.0000
Ecliptic XDOT        -0.00074407 +/-    0.0000
Ecliptic YDOT         0.00816757 +/-    0.0000
Ecliptic ZDOT        -0.00046022 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO    7.35605891 +/-    0.0000
Geocenter to KBO      6.35825399 +/-    0.0000
# Hcoef: 13.89

The following table shows the complete astrometric record for 17WW14. 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 (17WW14) followed by the observatory code and reference code for the source of the astrometry.

2015 09  09.36677  22 46 07.915  -11 47 11.63  22.3w 17WW14    F51  C~2zme      
2015 09  09.37796  22 46 07.713  -11 47 13.25  22.3w 17WW14    F51  C~2zme      
2015 09  09.38911  22 46 07.501  -11 47 14.66  21.9w 17WW14    F51  C~2zme      
2015 09  09.40021  22 46 07.280  -11 47 16.25  22.5w 17WW14    F51  C~2zme      
2017 08  03.57963  02 52 50.446  +10 15 03.00  22.0w 17WW14    F51  C~2zme      
2017 08  03.58997  02 52 50.705  +10 15 03.55  21.8w 17WW14    F51  C~2zme      
2017 08  03.61068  02 52 51.200  +10 15 04.61  21.8w 17WW14    F51  C~2zme      
2017 09  23.43836  03 00 45.473  +09 56 12.66  21.1G 17WW14    F51  C~2jiW      
2017 09  23.44929  03 00 45.399  +09 56 11.82  21.3G 17WW14    F51  C~2jiW      
2017 09  23.46031  03 00 45.321  +09 56 10.91  21.3G 17WW14    F51  C~2jiW      
2017 09  23.47130  03 00 45.242  +09 56 10.01  21.3G 17WW14    F51  C~2jiW      
2017 09  24.46292  03 00 38.354  +09 54 46.21  22.0G 17WW14    F51  C~2jiW      
2017 09  24.47652  03 00 38.243  +09 54 45.16  21.9G 17WW14    F51  C~2jiW      
2017 09  24.49021  03 00 38.134  +09 54 43.81  21.4G 17WW14    F51  C~2jiW      
2017 09  24.50377  03 00 38.029  +09 54 42.87  21.5G 17WW14    F51  C~2jiW      
2017 11  07.44586  02 48 14.132  +08 40 20.18  21.6G 17WW14    F51  C~2jiW      
2017 11  07.45678  02 48 13.890  +08 40 19.14  21.6G 17WW14    F51  C~2jiW      
2017 11  07.46787  02 48 13.637  +08 40 18.10  21.6G 17WW14    F51  C~2jiW      
2017 11  07.47886  02 48 13.380  +08 40 17.04  21.7G 17WW14    F51  C~2jiW      
2017 11  16.45161  02 44 58.983  +08 27 49.93  21.1G 17WW14    F51  C~2jiW      
2017 11  16.46446  02 44 58.680  +08 27 48.79  21.0G 17WW14    F51  C~2jiW      
2017 11  21.42724  02 43 16.667  +08 22 14.31  21.2w 17WW14    F51  C~2Rki      
2017 11  21.43881  02 43 16.413  +08 22 13.62  21.3w 17WW14    F51  C~2Rki      
2017 11  21.45036  02 43 16.191  +08 22 12.93  21.3w 17WW14    F51  C~2Rki      
2017 11  21.46196  02 43 15.946  +08 22 12.23  21.6w 17WW14    F51  C~2Rki      
2017 11  23.32480  02 42 39.25   +08 20 23.6   21.4R 17WW14    926  C~2Rki      
2017 11  23.35060  02 42 38.76   +08 20 22.1   20.8R 17WW14    926  C~2Rki      
2017 11  23.36940  02 42 38.37   +08 20 21.6   21.0R 17WW14    926  C~2Rki      
2017 11  24.11447  02 42 24.20   +08 19 40.6         17WW14    691  C~2Rki      
2017 11  24.11898  02 42 24.09   +08 19 40.8   20.3R 17WW14    691  C~2Rki      
2017 11  24.12351  02 42 24.00   +08 19 40.1   20.9R 17WW14    691  C~2Rki      
2017 11  24.36629  02 42 19.323  +08 19 27.68  21.1G 17WW14    F51  C~2jiW      
2017 11  26.21713  02 41 44.58   +08 17 55.6   22.2R 17WW14    691  C~2Rki      
2017 11  26.22615  02 41 44.41   +08 17 55.0   21.5R 17WW14    691  C~2Rki      
2017 11  26.23535  02 41 44.25   +08 17 54.2   21.3R 17WW14    691  C~2Rki      
2017 12  20.26409  02 36 31.452  +08 15 00.59  21.4R 17WW14    G37  C~2V06      
2017 12  20.34007  02 36 30.925  +08 15 03.16        17WW14    G37  C~2V06      
2018 01  11.22359  02 36 41.202  +08 41 58.47  21.6G 17WW14    F51  C~2jiW      
2018 01  11.23626  02 36 41.288  +08 41 59.86  21.6G 17WW14    F51  C~2jiW      
2018 01  11.24892  02 36 41.369  +08 42 01.21  21.6G 17WW14    F51  C~2jiW      
2019 02  08.166250 04 54 53.132  +17 58 20.68  22.4G 17WW14    G37  C~2zme      
2019 02  08.268260 04 54 53.290  +17 58 27.50        17WW14    G37  C~2zme      

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    -0.23       0.00     0.05
     2   0.0000      0.00     0.04       0.00    -0.07
     3   0.0001      0.00     0.15       0.00     0.01
     4   0.0001      0.00     0.11       0.00    -0.10
     5   1.9007      0.00    -0.20       0.00    -0.09
     6   1.9007      0.00    -0.04       0.00    -0.04
     7   1.9007      0.00    -0.07       0.00     0.02
     8   2.0399      0.00     0.07       0.00    -0.12
     9   2.0399      0.00     0.14       0.00    -0.06
    10   2.0400      0.00     0.16       0.00    -0.06
    11   2.0400      0.00     0.17       0.00    -0.05
    12   2.0427      0.00     0.10       0.00    -0.07
    13   2.0427      0.00     0.04       0.00     0.03
    14   2.0428      0.00     0.03       0.00    -0.17
    15   2.0428      0.00     0.06       0.00     0.04
    16   2.1631      0.00     0.14       0.00    -0.01
    17   2.1631      0.00     0.23       0.00    -0.04
    18   2.1632      0.00     0.21       0.00    -0.06
    19   2.1632      0.00     0.09       0.00    -0.11
    20   2.1878      0.00     0.44       0.00     0.17
    21   2.1878      0.00     0.09       0.00    -0.01
    22   2.2014      0.00     0.11       0.00    -0.12
    23   2.2014      0.00    -0.12       0.00    -0.10
    24   2.2015      0.00     0.12       0.00    -0.08
    25   2.2015      0.00     0.03       0.00    -0.07
    26   2.2066      0.00    -0.71       0.00    -0.02
    27   2.2067      0.00    -0.34       0.00    -0.06
    28   2.2067      0.00    -0.58       0.00     0.50
    29   2.2088      0.00     0.02       0.00     0.01
    30   2.2088      0.00    -0.31       0.00     0.45
    31   2.2088      0.00    -0.32       0.00    -0.01
    32   2.2094      0.00     0.17       0.00     0.01
    33   2.2145      0.00    -0.14       0.00     0.45
    34   2.2145      0.00    -0.10       0.00     0.27
    35   2.2146      0.00     0.13       0.00    -0.10
    36   2.2803      0.00     0.15       0.00     0.02
    37   2.2806      0.00     0.15       0.00    -0.01
    38   2.3405      0.00     0.17       0.00    -0.03
    39   2.3405      0.00     0.14       0.00    -0.04
    40   2.3405      0.00     0.04       0.00    -0.09
    41   3.4163      0.00    -0.03       0.00    -0.31
    42   3.4166      0.00     0.09       0.00    -0.01

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.

17WW14    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        22.917    22.917    22.917
ecceobj         0.750     0.750     0.750
incobj          5.974     5.974     5.974
qmin            5.735     5.735     5.735
qmax          268.009    40.098    40.099
amean          53.862    22.917    22.886
amin           22.917    22.917    22.854
amax          137.044    22.917    22.917
emean           0.862     0.750     0.748
emin            0.750     0.750     0.746
emax            0.956     0.750     0.750
imean           4.368     4.522     4.555
imin            3.902     4.522     4.522
imax            4.881     4.522     4.588
excite_mean     0.865     0.754     0.752
fracstop        0.006     0.000     0.000
cjmean          1.911     2.465     2.468

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       177.2     272.4     273.9
kozaiamp        178.2       0.0       1.4