Orbit Fit and Astrometric record for 15UN105

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: 15UN105   
# Created Fri Dec  3 02:13:34 2021
# Orbit generated from Bernstein formalism
# Fitting      9 observations of      9
# Arc:   3.06y
# First observation: 2014/11/04
#  Last observation: 2017/11/24
Preliminary a, adot, b, bdot, g, gdot:
   0.000193   0.029210  -0.000028  -0.007716   0.024910   0.000000
# Chi-squared of fit:     4.23 DOF:     12 RMS:  0.12
# Min/Max residuals:    -0.23    0.26
# Exact a, adot, b, bdot, g, gdot:
  1.928052E-05  2.957488E-02 -6.142821E-06 -7.777818E-03  2.401018E-02  4.136718E-03
# Covariance matrix:
  1.2669E-12 -1.5272E-12 -1.6874E-13  3.1988E-13 -3.4732E-13 -1.3389E-11
 -1.5272E-12  2.6316E-12  2.8841E-13 -5.9516E-13 -1.0216E-12  2.8388E-11
 -1.6874E-13  2.8841E-13  6.3560E-13 -3.5067E-13  3.9309E-13  2.6731E-12
  3.1988E-13 -5.9516E-13 -3.5067E-13  3.2499E-13 -1.3167E-13 -6.3884E-12
 -3.4732E-13 -1.0216E-12  3.9309E-13 -1.3167E-13  2.1280E-11 -3.8568E-11
 -1.3389E-11  2.8388E-11  2.6731E-12 -6.3884E-12 -3.8568E-11  3.6228E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
  -35.165551   14.170096   -0.453225   -0.508740   -0.722427  2456965.690158
# Heliocentric elements and errors
Epoch:              2456960.5000  =  2014/10/30
Mean Anomaly:            1.50141 +/-     0.014
Argument of Peri:      231.50989 +/-     0.068
Long of Asc Node:      129.44698 +/-     0.001
Inclination:            37.04626 +/-     0.000
Eccentricity:         0.77494582 +/-    0.0012
Semi-Major Axis:    184.05038570 +/-    1.0303
Time of Perihelion: 2453156.8486 +/-      12.9
Perihelion:          41.42130884 +/-    0.3264
Aphelion:           326.67946255 +/-    1.8431
Period (y)             2496.9699 +/-     20.97
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           33.75454780 +/-    0.0063
Ecliptic Y            8.99255167 +/-    0.0016
Ecliptic Z          -23.98762829 +/-    0.0046
Ecliptic XDOT        -0.00095131 +/-    0.0000
Ecliptic YDOT         0.00323425 +/-    0.0000
Ecliptic ZDOT        -0.00099660 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.37501379 +/-    0.0057
Geocenter to KBO     41.64900531 +/-    0.0080
# Hcoef:  7.27

The following table shows the complete astrometric record for 15UN105. 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 (15UN105) followed by the observatory code and reference code for the source of the astrometry.

2014 11  04.18938  01 50 01.293  -26 40 02.75  23.1z 15UN105   W84  C~55XC      
2015 10  23.32395  01 58 36.518  -26 16 38.81  23.2r 15UN105   W84  C~55XC      
2015 11  03.18232  01 57 45.580  -26 19 32.24  24.2r 15UN105   W84  C~55XC      
2015 11  05.20075  01 57 36.237  -26 19 52.24  23.1r 15UN105   W84  C~55XC      
2015 11  14.11356  01 56 56.248  -26 20 30.29  23.7r 15UN105   W84  C~55XC      
2016 11  09.25846  02 04 45.441  -25 58 52.58  23.6i 15UN105   W84  C~55XC      
2016 11  09.26672  02 04 45.390  -25 58 52.32  24.2g 15UN105   W84  C~55XC      
2017 11  24.23228  02 11 05.376  -25 35 49.64  23.8r 15UN105   W84  C~55XC      
2017 11  24.23365  02 11 05.383  -25 35 49.73  23.0i 15UN105   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     0.04       0.00     0.21
     2   0.9668   6834.43     0.03   -1777.20    -0.10
     3   0.9966   6143.26     0.02   -1626.87    -0.05
     4   1.0021   6021.76    -0.22   -1588.85    -0.23
     5   1.0265   5522.82     0.10   -1383.97    -0.03
     6   2.0152  11759.23     0.01   -3073.97    -0.09
     7   2.0153  11758.73    -0.01   -3073.42     0.26
     8   3.0556  16975.42    -0.04   -4227.33     0.09
     9   3.0556  16975.46     0.06   -4227.45    -0.08

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.

15UN105    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj       193.185   196.787   189.723
ecceobj         0.786     0.790     0.782
incobj         37.015    37.016    37.015
qmin           39.074    39.773    39.198
qmax          347.498   354.378   341.734
amean         184.959   188.523   181.975
amin          178.802   183.045   176.554
amax          194.174   198.107   191.321
emean           0.778     0.779     0.774
emin            0.767     0.768     0.764
emax            0.790     0.790     0.786
imean          35.268    35.788    35.274
imin           34.733    35.101    34.796
imax           36.031    36.385    36.014
excite_mean     0.969     0.974     0.966
fracstop        1.000     1.000     1.000
cjmean          2.708     2.708     2.708

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       244.6     236.2     245.0
kozaiamp         14.2       5.9      14.2