Orbit Fit and Astrometric record for 14UM277

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: 14UM277   
# Created Tue Nov 30 02:12:56 2021
# Orbit generated from Bernstein formalism
# Fitting     18 observations of     18
# Arc:   3.99y
# First observation: 2014/10/23
#  Last observation: 2018/10/18
Preliminary a, adot, b, bdot, g, gdot:
  -0.000129   0.033064   0.000004  -0.001516   0.029407   0.000000
# Chi-squared of fit:     7.89 DOF:     30 RMS:  0.12
# Min/Max residuals:    -0.24    0.28
# Exact a, adot, b, bdot, g, gdot:
  1.907759E-05  3.231799E-02 -1.928992E-06 -1.474818E-03  2.673246E-02 -6.111539E-03
# Covariance matrix:
  4.9897E-13 -2.5171E-13 -4.5245E-15  5.4024E-15  1.0295E-13 -8.0116E-13
 -2.5171E-13  5.5605E-13  5.5114E-15 -2.3799E-14  6.5301E-13  4.2116E-12
 -4.5245E-15  5.5114E-15  3.9549E-13 -1.2214E-13 -4.8384E-15  3.3545E-14
  5.4024E-15 -2.3799E-14 -1.2214E-13  4.8110E-14 -3.3072E-14 -1.9947E-13
  1.0295E-13  6.5301E-13 -4.8384E-15 -3.3072E-14  1.8664E-12  6.4439E-12
 -8.0116E-13  4.2116E-12  3.3545E-14 -1.9947E-13  6.4439E-12  3.5898E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.734326   -0.358156   -0.494119   -0.041119   -0.864630  2456953.693748
# Heliocentric elements and errors
Epoch:              2456950.5000  =  2014/10/20
Mean Anomaly:          350.56078 +/-     0.010
Argument of Peri:      257.01548 +/-     0.024
Long of Asc Node:      134.24739 +/-     0.005
Inclination:             3.70432 +/-     0.000
Eccentricity:         0.49199879 +/-    0.0003
Semi-Major Axis:     71.83244827 +/-    0.0388
Time of Perihelion: 2462781.0995 +/-       3.8
Perihelion:          36.49097038 +/-    0.0283
Aphelion:           107.17392617 +/-    0.0614
Period (y)              608.8204 +/-      0.49
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           38.23052486 +/-    0.0019
Ecliptic Y            0.25705087 +/-    0.0000
Ecliptic Z           -1.78464767 +/-    0.0001
Ecliptic XDOT        -0.00061617 +/-    0.0000
Ecliptic YDOT         0.00330900 +/-    0.0000
Ecliptic ZDOT        -0.00012091 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.27302017 +/-    0.0019
Geocenter to KBO     37.40771069 +/-    0.0019
# Hcoef:  7.58

The following table shows the complete astrometric record for 14UM277. 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 (14UM277) followed by the observatory code and reference code for the source of the astrometry.

2014 10  23.19297  00 03 02.364  -02 39 03.57  23.5r 14UM277   W84  C~55Sg      
2014 10  23.19436  00 03 02.373  -02 39 03.89  23.6g 14UM277   W84  C~55Sg      
2014 11  15.10548  00 01 48.304  -02 46 10.81  23.2z 14UM277   W84  C~55Sg      
2016 11  30.11061  00 15 09.610  -01 29 12.96  23.4r 14UM277   W84  C~55Sg      
2016 11  30.11446  00 15 09.616  -01 29 12.54  23.2i 14UM277   W84  C~55Sg      
2016 11  30.11584  00 15 09.595  -01 29 12.94  23.7g 14UM277   W84  C~55Sg      
2016 12  19.05933  00 15 00.743  -01 28 51.46  23.2i 14UM277   W84  C~55Sg      
2017 09  27.21439  00 26 06.754  -00 25 24.54  22.9i 14UM277   W84  C~55Sg      
2017 09  27.21575  00 26 06.747  -00 25 24.44  23.0r 14UM277   W84  C~55Sg      
2017 10  12.18913  00 24 56.408  -00 33 01.87  23.6g 14UM277   W84  C~55Sg      
2017 10  27.16442  00 23 50.987  -00 39 47.47  23.1z 14UM277   W84  C~55Sg      
2017 10  29.12934  00 23 43.096  -00 40 34.71  23.2i 14UM277   W84  C~55Sg      
2017 11  09.06153  00 23 03.172  -00 44 26.33  23.2r 14UM277   W84  C~55Sg      
2018 09  09.33142  00 34 41.556  +00 25 30.98  23.3r 14UM277   W84  C~55Sg      
2018 09  09.33280  00 34 41.550  +00 25 31.01  23.0i 14UM277   W84  C~55Sg      
2018 10  10.25683  00 32 18.326  +00 09 29.15  23.5r 14UM277   W84  C~55Sg      
2018 10  10.25820  00 32 18.318  +00 09 29.03  23.5i 14UM277   W84  C~55Sg      
2018 10  18.18917  00 31 41.651  +00 05 37.57  23.2z 14UM277   W84  C~55Sg      

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     0.01       0.00     0.22
     2   0.0000     -0.00     0.09      -0.35    -0.13
     3   0.0627  -1188.03    -0.09      49.80    -0.24
     4   2.1052  11680.49    -0.12    -509.57    -0.13
     5   2.1052  11680.74     0.22    -509.22     0.21
     6   2.1052  11680.29    -0.20    -509.46    -0.04
     7   2.1571  11566.86    -0.00    -436.56     0.09
     8   2.9296  22318.70    -0.10    -950.51    -0.07
     9   2.9296  22318.64    -0.05    -950.38     0.07
    10   2.9706  21155.92     0.00    -946.47     0.28
    11   3.0116  20083.73     0.11    -924.63    -0.03
    12   3.0169  19955.16     0.13    -920.45     0.01
    13   3.0469  19307.88     0.05    -892.54     0.12
    14   3.8799  30756.65     0.01   -1250.62    -0.13
    15   3.8799  30756.58     0.04   -1250.56    -0.06
    16   3.9646  28354.46     0.00   -1270.15    -0.05
    17   3.9646  28354.30    -0.05   -1270.21    -0.11
    18   3.9863  27746.58    -0.06   -1261.53     0.00

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.

14UM277    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        73.072    73.175    72.970
ecceobj         0.500     0.501     0.499
incobj          3.697     3.697     3.697
qmin           35.756    35.817    35.754
qmax          110.768   110.802   110.999
amean          71.376    72.214    72.138
amin           69.764    71.129    71.002
amax           73.639    73.664    73.756
emean           0.488     0.494     0.493
emin            0.473     0.484     0.482
emax            0.504     0.504     0.506
imean           2.747     2.468     2.717
imin            2.276     2.334     2.270
imax            3.258     2.627     3.098
excite_mean     0.490     0.495     0.496
fracstop        1.000     1.000     1.000
cjmean          3.106     3.108     3.107

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       179.2     189.7     188.4
kozaiamp        180.0     180.0     180.0