Orbit Fit and Astrometric record for 14XB48

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: 14XB48    
# Created Thu Dec  9 02:12:54 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     42 observations of     42
# Arc:   7.04y
# First observation: 2014/10/27
#  Last observation: 2021/11/11
# Chi-squared of fit:    13.19 DOF:     78 RMS:  0.10
# Min/Max residuals:    -0.35    0.28
# Exact a, adot, b, bdot, g, gdot:
  2.019759E-05  3.515222E-02 -2.075335E-06 -3.594178E-03  2.836980E-02 -7.293107E-03
# Covariance matrix:
  1.7172E-13 -7.4310E-14 -1.5696E-14  5.5026E-15  4.9902E-14 -2.1301E-13
 -7.4310E-14  6.0615E-14  5.4620E-15 -5.0254E-15  4.9743E-15  2.1861E-13
 -1.5696E-14  5.4620E-15  9.8606E-14 -2.1436E-14 -2.2609E-14  1.9762E-14
  5.5026E-15 -5.0254E-15 -2.1436E-14  7.6371E-15  5.8532E-16 -2.0433E-14
  4.9902E-14  4.9743E-15 -2.2609E-14  5.8532E-16  1.2460E-13  3.4162E-14
 -2.1301E-13  2.1861E-13  1.9762E-14 -2.0433E-14  3.4162E-14  8.9552E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
  -28.509355   28.801473   -0.081124   -0.473371   -0.871894  2456957.826498
# Heliocentric elements and errors
Epoch:              2456958.5000  =  2014/10/28
Mean Anomaly:          349.83404 +/-     0.002
Argument of Peri:      294.44582 +/-     0.005
Long of Asc Node:      130.96651 +/-     0.000
Inclination:            28.28589 +/-     0.000
Eccentricity:         0.51141004 +/-    0.0001
Semi-Major Axis:     69.39253154 +/-    0.0083
Time of Perihelion: 2462920.7949 +/-      36.7
Perihelion:          33.90449387 +/-    0.0054
Aphelion:           104.88056921 +/-    0.0130
Period (y)              578.0658 +/-      0.10
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           27.97009506 +/-    0.0003
Ecliptic Y           15.47361057 +/-    0.0002
Ecliptic Z          -16.82442592 +/-    0.0002
Ecliptic XDOT        -0.00232585 +/-    0.0000
Ecliptic YDOT         0.00259018 +/-    0.0000
Ecliptic ZDOT         0.00003125 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   36.12243753 +/-    0.0003
Geocenter to KBO     35.24892146 +/-    0.0004
# Hcoef:  7.24

The following table shows the complete astrometric record for 14XB48. 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 (14XB48) followed by the observatory code and reference code for the source of the astrometry.

2014 10  27.32572  02 27 37.406  -15 38 07.48  23.5g 14XB48    W84  C~4yVS      
2014 12  12.19842  02 23 56.558  -15 41 54.58  22.0i 14XB48    W84  C~4yVS      
2014 12  12.19842  02 23 56.56   -15 41 54.6   22.1i 14XB48    W84  C~3cpY      
2014 12  15.18670  02 23 46.070  -15 40 56.70  23.7g 14XB48    W84  C~4yVS      
2014 12  15.19384  02 23 46.024  -15 40 56.64  22.6i 14XB48    W84  C~4yVS      
2014 12  16.17957  02 23 42.743  -15 40 35.72  22.8r 14XB48    W84  C~4yVS      
2014 12  16.17957  02 23 42.74   -15 40 35.7   22.8r 14XB48    W84  C~3cpY      
2014 12  24.16741  02 23 19.190  -15 37 11.63  23.2r 14XB48    W84  C~4yVS      
2014 12  24.16741  02 23 19.19   -15 37 11.6   23.3r 14XB48    W84  C~3cpY      
2015 01  08.12240  02 22 51.886  -15 28 19.66  22.7z 14XB48    W84  C~4yVS      
2016 08  29.41062  02 47 32.360  -13 48 01.35  22.6i 14XB48    W84  C~4yVS      
2016 08  29.41062  02 47 32.36   -13 48 01.3   22.7i 14XB48    W84  C~3cpY      
2016 09  25.25510  02 46 25.192  -14 10 14.56  23.5g 14XB48    W84  C~4yVS      
2016 09  25.25510  02 46 25.19   -14 10 14.6   23.6g 14XB48    W84  C~3cpY      
2016 11  19.16351  02 41 53.265  -14 37 55.49  22.3z 14XB48    W84  C~4yVS      
2016 11  19.16351  02 41 53.26   -14 37 55.5   22.4z 14XB48    W84  C~3cpY      
2016 12  02.12613  02 40 49.184  -14 38 01.44  23.0r 14XB48    W84  C~4yVS      
2016 12  02.12613  02 40 49.18   -14 38 01.4   23.0r 14XB48    W84  C~3cpY      
2016 12  02.12749  02 40 49.177  -14 38 01.40  22.6i 14XB48    W84  C~4yVS      
2016 12  02.12749  02 40 49.18   -14 38 01.4   22.7i 14XB48    W84  C~3cpY      
2016 12  02.12886  02 40 49.165  -14 38 01.37  23.8g 14XB48    W84  C~4yVS      
2016 12  02.12886  02 40 49.16   -14 38 01.4   23.7g 14XB48    W84  C~3cpY      
2017 10  21.28416  02 52 44.400  -13 51 52.11  22.5r 14XB48    W84  C~4yVS      
2017 10  21.28553  02 52 44.395  -13 51 52.11  22.7i 14XB48    W84  C~4yVS      
2017 10  21.28691  02 52 44.381  -13 51 52.31  23.8g 14XB48    W84  C~4yVS      
2018 01  09.12005  02 46 55.962  -13 47 52.11  22.8r 14XB48    W84  C~4yVS      
2018 01  09.12142  02 46 55.963  -13 47 52.03  22.6i 14XB48    W84  C~4yVS      
2018 01  09.12279  02 46 55.959  -13 47 52.12  23.5g 14XB48    W84  C~4yVS      
2018 01  16.10243  02 46 47.513  -13 42 51.48  22.5r 14XB48    W84  C~4yVS      
2018 01  16.10379  02 46 47.510  -13 42 51.41  22.4i 14XB48    W84  C~4yVS      
2018 01  16.10517  02 46 47.519  -13 42 51.57  22.9g 14XB48    W84  C~4yVS      
2018 10  28.32860  03 00 28.392  -13 17 57.83  22.0z 14XB48    W84  C~4yVS      
2018 11  07.31226  02 59 34.324  -13 22 09.71  22.6r 14XB48    W84  C~4yVS      
2018 11  07.31365  02 59 34.320  -13 22 09.80  22.7i 14XB48    W84  C~4yVS      
2020 10  20.48248  03 17 54.879  -11 54 33.69  22.6w 14XB48    F51  C~4A5c      
2020 10  20.49652  03 17 54.827  -11 54 34.08  22.6w 14XB48    F51  C~4A5c      
2020 10  20.52470  03 17 54.687  -11 54 35.27  22.8w 14XB48    F51  C~4A5c      
2021 01  11.125480 03 11 32.933  -11 53 14.10  22.2G 14XB48    G37  C~4UFe      
2021 01  11.190430 03 11 32.792  -11 53 12.00        14XB48    G37  C~4UFe      
2021 11  11.406954 03 24 28.851  -11 22 59.07  22.5w 14XB48    F51  C~5BVW      
2021 11  11.432714 03 24 28.716  -11 22 59.29  22.8w 14XB48    F51  C~5BVW      
2021 11  11.445624 03 24 28.629  -11 22 59.85  22.5w 14XB48    F51  C~5BVW      

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    -0.13       0.00    -0.03
     2   0.1256      0.00    -0.03       0.00     0.12
     3   0.1256      0.00     0.00       0.00     0.10
     4   0.1338      0.00     0.06       0.00     0.15
     5   0.1338      0.00    -0.26       0.00     0.06
     6   0.1365      0.00    -0.04       0.00     0.01
     7   0.1365      0.00     0.00       0.00    -0.01
     8   0.1584      0.00     0.16       0.00     0.05
     9   0.1584      0.00     0.16       0.00     0.02
    10   0.1993      0.00    -0.05       0.00    -0.07
    11   1.8401      0.00    -0.01       0.00    -0.06
    12   1.8401      0.00    -0.01       0.00    -0.11
    13   1.9136      0.00    -0.06       0.00    -0.02
    14   1.9136      0.00    -0.03       0.00     0.02
    15   2.0639      0.00     0.10       0.00    -0.03
    16   2.0639      0.00     0.02       0.00    -0.04
    17   2.0994      0.00    -0.00       0.00     0.03
    18   2.0994      0.00     0.06       0.00    -0.01
    19   2.0994      0.00     0.09       0.00     0.02
    20   2.0994      0.00     0.05       0.00     0.02
    21   2.0994      0.00    -0.11       0.00     0.01
    22   2.0994      0.00    -0.04       0.00     0.04
    23   2.9841      0.00     0.08       0.00     0.05
    24   2.9841      0.00     0.11       0.00     0.10
    25   2.9842      0.00     0.01       0.00    -0.06
    26   3.2027      0.00     0.01       0.00    -0.01
    27   3.2027      0.00     0.06       0.00     0.01
    28   3.2027      0.00     0.03       0.00    -0.14
    29   3.2218      0.00     0.00       0.00    -0.02
    30   3.2218      0.00    -0.02       0.00    -0.01
    31   3.2218      0.00     0.13       0.00    -0.24
    32   4.0027      0.00    -0.00       0.00    -0.10
    33   4.0301      0.00     0.03       0.00     0.05
    34   4.0301      0.00     0.08       0.00    -0.01
    35   5.9826      0.00    -0.18       0.00     0.04
    36   5.9827      0.00     0.10       0.00     0.15
    37   5.9827      0.00     0.13       0.00    -0.03
    38   6.2089      0.00    -0.16       0.00     0.13
    39   6.2091      0.00    -0.21       0.00    -0.35
    40   7.0420      0.00    -0.01       0.00    -0.00
    41   7.0420      0.00     0.15       0.00     0.28
    42   7.0421      0.00    -0.05       0.00    -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.

14XB48    quality flag:3

Type:       7:2EEEEE  7:2EEEEE  7:2EEEEE

axisobj        70.419    70.418    70.420
ecceobj         0.517     0.517     0.517
incobj         28.266    28.266    28.266
qmin           31.584    31.586    31.583
qmax          109.588   109.656   109.440
amean          69.407    69.407    69.407
amin           68.327    68.330    68.329
amax           70.865    70.975    70.890
emean           0.528     0.528     0.528
emin            0.502     0.502     0.502
emax            0.546     0.547     0.546
imean          25.295    25.302    25.293
imin           24.379    24.383    24.376
imax           26.927    26.927    26.927
excite_mean     0.679     0.679     0.679
fracstop        1.000     1.000     1.000
cjmean          2.765     2.765     2.765

libcent 0       178.1     179.6     178.0
libamp  0       109.7     112.8     113.2
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       246.0     244.3     245.9
kozaiamp        180.0     180.0     180.0