Orbit Fit and Astrometric record for 15QL14

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: 15QL14    
# Created Wed Dec  8 02:13:28 2021
# Orbit generated from Bernstein formalism
# Fitting     16 observations of     16
# Arc:   2.27y
# First observation: 2015/08/16
#  Last observation: 2017/11/23
Preliminary a, adot, b, bdot, g, gdot:
   0.000065   0.023738   0.000017   0.000822   0.024144   0.000000
# Chi-squared of fit:    52.56 DOF:     26 RMS:  0.32
# Min/Max residuals:    -0.61    0.59
# Exact a, adot, b, bdot, g, gdot:
  1.730734E-05  2.425979E-02  3.493379E-06  8.602727E-04  2.455779E-02 -2.800617E-03
# Covariance matrix:
  2.3698E-13 -2.3148E-13  4.0620E-15 -1.1605E-14 -3.4780E-14 -1.9225E-12
 -2.3148E-13  1.2112E-12 -5.8627E-14  1.1285E-13  6.8605E-13  2.3172E-11
  4.0620E-15 -5.8627E-14  2.2981E-13 -1.4598E-13 -4.5850E-14 -1.3006E-12
 -1.1605E-14  1.1285E-13 -1.4598E-13  1.6239E-13  5.6989E-14  2.4194E-12
 -3.4780E-14  6.8605E-13 -4.5850E-14  5.6989E-14  6.4188E-13  1.5504E-11
 -1.9225E-12  2.3172E-11 -1.3006E-12  2.4194E-12  1.5504E-11  5.0702E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
  -12.291411  -53.757728   -0.291623   -0.206891   -0.950258  2457250.675709
# Heliocentric elements and errors
Epoch:              2457250.5000  =  2015/08/16
Mean Anomaly:          297.04711 +/-     0.048
Argument of Peri:      355.36417 +/-     0.122
Long of Asc Node:       26.32908 +/-     0.004
Inclination:            12.19828 +/-     0.000
Eccentricity:         0.11381373 +/-    0.0009
Semi-Major Axis:     43.43872646 +/-    0.0116
Time of Perihelion: 2475536.8581 +/-      12.0
Perihelion:          38.49480318 +/-    0.0418
Aphelion:            48.38264974 +/-    0.0425
Period (y)              286.3016 +/-      0.11
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           24.32923817 +/-    0.0008
Ecliptic Y          -32.70112259 +/-    0.0010
Ecliptic Z           -8.66854244 +/-    0.0003
Ecliptic XDOT         0.00201104 +/-    0.0000
Ecliptic YDOT         0.00182220 +/-    0.0000
Ecliptic ZDOT         0.00016023 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.67035969 +/-    0.0009
Geocenter to KBO     40.72027159 +/-    0.0013
# Hcoef:  6.97

The following table shows the complete astrometric record for 15QL14. 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 (15QL14) followed by the observatory code and reference code for the source of the astrometry.

2015 08  16.17492  20 48 34.362  -30 34 57.41  23.2r 15QL14    807  C~2Z6n      
2015 08  18.04935  20 48 24.646  -30 35 20.54  23.2r 15QL14    807  C~2Z6n      
2015 08  18.11161  20 48 24.332  -30 35 21.56  23.1r 15QL14    807  C~2Z6n      
2015 08  18.17929  20 48 23.958  -30 35 21.97  23.1r 15QL14    807  C~2Z6n      
2015 10  16.07056  20 45 06.631  -30 33 35.05        15QL14    304  C~2Z6n      
2015 10  16.14502  20 45 06.581  -30 33 33.11        15QL14    304  C~2Z6n      
2016 05  10.37493  21 00 28.109  -29 33 08.21  23.2r 15QL14    304  C~2Z6n      
2016 09  25.00291  20 51 47.837  -30 11 54.57        15QL14    304  C~2Z6n      
2016 09  25.08750  20 51 47.585  -30 11 54.21        15QL14    304  C~2Z6n      
2016 09  26.01104  20 51 44.946  -30 11 49.15        15QL14    304  C~2Z6n      
2016 11  02.06076  20 51 09.432  -30 02 42.93        15QL14    304  C~2Z6n      
2017 04  22.42292  21 05 59.532  -29 01 33.25  23.0r 15QL14    304  C~2Z6n      
2017 04  23.42145  21 06 01.804  -29 01 41.28  23.1r 15QL14    304  C~2Z6n      
2017 04  26.41798  21 06 07.967  -29 02 09.18        15QL14    304  C~2Z6n      
2017 11  22.03564  20 57 45.608  -29 27 57.64  23.2r 15QL14    304  C~2Z6n      
2017 11  23.02673  20 57 48.600  -29 27 28.79  23.2r 15QL14    304  C~2Z6n      

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    -0.35       0.00    -0.61
     2   0.0051   -127.01     0.22      12.00    -0.19
     3   0.0053   -131.19     0.32      12.12    -0.46
     4   0.0055   -135.95     0.22      13.05     0.00
     5   0.1667  -2561.55    -0.30     802.29    -0.07
     6   0.1669  -2561.65     0.02     804.33     0.59
     7   0.7343   9946.38    -0.38     907.78     0.16
     8   1.1111   2788.35     0.16     636.51     0.36
     9   1.1113   2785.32     0.14     637.77     0.27
    10   1.1139   2753.88    -0.04     652.21     0.18
    11   1.2153   2463.95    -0.20    1305.44     0.33
    12   1.6845  14669.99     0.39    1398.00     0.26
    13   1.6872  14695.97     0.36    1381.11     0.35
    14   1.6954  14764.53    -0.55    1329.44    -0.21
    15   2.2693   8007.74    -0.03    1831.46    -0.42
    16   2.2720   8053.62     0.00    1847.65    -0.56

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.

15QL14    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        43.563    43.591    43.535
ecceobj         0.119     0.121     0.117
incobj         12.202    12.202    12.202
qmin           36.264    37.604    35.310
qmax           51.693    50.270    52.694
amean          43.758    43.725    43.681
amin           43.247    43.310    43.234
amax           44.228    44.205    44.296
emean           0.139     0.120     0.155
emin            0.107     0.103     0.108
emax            0.170     0.138     0.192
imean          11.165    11.574    11.298
imin           10.133    10.867     9.985
imax           12.232    12.179    12.752
excite_mean     0.238     0.234     0.250
fracstop        1.000     1.000     1.000
cjmean          3.030     3.032     3.023

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       175.2     173.8     175.1
kozaiamp        180.0     180.0     180.0