Orbit Fit and Astrometric record for 15UO105

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: 15UO105   
# Created Fri Dec  3 02:13:34 2021
# Orbit generated from Bernstein formalism
# Fitting     13 observations of     13
# Arc:   3.13y
# First observation: 2015/10/17
#  Last observation: 2018/12/03
Preliminary a, adot, b, bdot, g, gdot:
   0.000182   0.022765  -0.000127  -0.020354   0.027205   0.000000
# Chi-squared of fit:     7.55 DOF:     20 RMS:  0.13
# Min/Max residuals:    -0.26    0.36
# Exact a, adot, b, bdot, g, gdot:
  1.392091E-05  2.321451E-02 -1.321175E-05 -2.072386E-02  2.715933E-02  3.828342E-03
# Covariance matrix:
  3.4883E-13 -1.6776E-13 -4.8414E-14  4.0626E-14  2.0187E-13 -1.3086E-12
 -1.6776E-13  6.2518E-13  1.1169E-13 -5.0278E-13  5.8014E-13  8.4628E-12
 -4.8414E-14  1.1169E-13  3.1801E-13 -2.3405E-13 -1.0767E-14  2.1528E-12
  4.0626E-14 -5.0278E-13 -2.3405E-13  5.8492E-13 -5.5463E-13 -8.1377E-12
  2.0187E-13  5.8014E-13 -1.0767E-14 -5.5463E-13  1.4860E-12  7.2107E-12
 -1.3086E-12  8.4628E-12  2.1528E-12 -8.1377E-12  7.2107E-12  1.4245E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
  -35.741540    6.679065   -0.286025   -0.559846   -0.778275  2457312.742649
# Heliocentric elements and errors
Epoch:              2457310.5000  =  2015/10/15
Mean Anomaly:           16.55365 +/-     0.040
Argument of Peri:      195.67170 +/-     0.082
Long of Asc Node:      154.46815 +/-     0.001
Inclination:            52.20407 +/-     0.000
Eccentricity:         0.28918098 +/-    0.0003
Semi-Major Axis:     51.23347720 +/-    0.0131
Time of Perihelion: 2451151.3548 +/-      14.6
Perihelion:          36.41772981 +/-    0.0167
Aphelion:            66.04922459 +/-    0.0219
Period (y)              366.7237 +/-      0.14
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           30.59727498 +/-    0.0013
Ecliptic Y            3.87105197 +/-    0.0002
Ecliptic Z          -21.50796853 +/-    0.0010
Ecliptic XDOT        -0.00117469 +/-    0.0000
Ecliptic YDOT         0.00221222 +/-    0.0000
Ecliptic ZDOT        -0.00192103 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.60014614 +/-    0.0012
Geocenter to KBO     36.81976550 +/-    0.0017
# Hcoef:  7.99

The following table shows the complete astrometric record for 15UO105. 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 (15UO105) followed by the observatory code and reference code for the source of the astrometry.

2015 10  17.24186  01 26 20.874  -29 53 33.77  23.5r 15UO105   W84  C~55XC      
2015 11  06.23187  01 24 31.963  -30 00 15.38  24.0r 15UO105   W84  C~55XC      
2015 11  07.26667  01 24 26.654  -30 00 23.97  24.3g 15UO105   W84  C~55XC      
2015 11  16.11771  01 23 43.526  -30 00 42.64  24.2r 15UO105   W84  C~55XC      
2016 09  30.37705  01 35 46.322  -30 08 53.43  23.4i 15UO105   W84  C~55XC      
2016 10  29.28465  01 33 06.381  -30 25 06.32  23.4r 15UO105   W84  C~55XC      
2016 12  02.07985  01 30 28.254  -30 23 55.64  23.2i 15UO105   W84  C~55XC      
2016 12  20.14308  01 29 40.861  -30 14 41.39  23.7r 15UO105   W84  C~55XC      
2016 12  20.14445  01 29 40.855  -30 14 41.38  24.2g 15UO105   W84  C~55XC      
2017 11  26.22703  01 38 44.371  -30 50 28.91  24.2r 15UO105   W84  C~55XC      
2018 02  04.03275  01 38 01.479  -29 58 41.27  22.9z 15UO105   W84  C~55XC      
2018 12  03.07175  01 46 10.864  -31 11 16.22  24.4r 15UO105   W84  C~55XC      
2018 12  03.07313  01 46 10.871  -31 11 15.94  24.6g 15UO105   W84  C~55XC      

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    -0.08       0.00     0.24
     2   0.0547  -1443.61    -0.02     284.73     0.08
     3   0.0576  -1509.01    -0.15     308.25    -0.26
     4   0.0818  -2017.38     0.10     544.42    -0.06
     5   0.9559   6077.31    -0.03   -4229.60    -0.19
     6   1.0350   3789.76     0.00   -4110.39     0.03
     7   1.1276   2012.33     0.36   -3093.38     0.10
     8   1.1770   1724.90     0.04   -2317.83     0.02
     9   1.1770   1724.84    -0.03   -2317.79     0.00
    10   2.1108   6912.66     0.01   -7525.23    -0.00
    11   2.3020   7914.41    -0.23   -4527.53     0.14
    12   3.1289  11335.29    -0.12  -11427.37    -0.12
    13   3.1289  11335.51     0.15  -11427.17     0.02

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.

15UO105    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        51.796    51.840    51.752
ecceobj         0.297     0.298     0.296
incobj         52.076    52.077    52.076
qmin           34.573    34.424    34.671
qmax           69.007    69.319    68.808
amean          51.443    51.488    51.370
amin           50.956    51.009    50.884
amax           52.069    52.126    51.976
emean           0.308     0.310     0.306
emin            0.286     0.287     0.286
emax            0.326     0.330     0.324
imean          50.823    50.804    50.833
imin           50.474    50.441    50.505
imax           51.270    51.276    51.261
excite_mean     0.834     0.835     0.834
fracstop        1.000     1.000     1.000
cjmean          2.157     2.156     2.157

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       264.0     265.7     263.4
kozaiamp         70.1      72.1      69.0