Orbit Fit and Astrometric record for 15QY33

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: 15QY33    
# Created Fri Dec  3 02:13:26 2021
# Orbit generated from Bernstein formalism
# Fitting     10 observations of     10
# Arc:   2.77y
# First observation: 2014/12/20
#  Last observation: 2017/09/26
Preliminary a, adot, b, bdot, g, gdot:
  -0.000221   0.020861   0.000072  -0.007881   0.023673   0.000000
# Chi-squared of fit:     2.53 DOF:     14 RMS:  0.09
# Min/Max residuals:    -0.14    0.18
# Exact a, adot, b, bdot, g, gdot:
  1.425076E-05  2.052925E-02 -5.166496E-06 -7.756181E-03  2.312502E-02  3.002917E-04
# Covariance matrix:
  1.2111E-12 -1.1348E-12 -2.5550E-13  3.2642E-13 -5.6749E-13 -1.1267E-11
 -1.1348E-12  1.6926E-12  3.2242E-13 -5.6696E-13  4.2931E-13  1.8642E-11
 -2.5550E-13  3.2242E-13  5.4221E-13 -3.5074E-13  1.8190E-13  4.0165E-12
  3.2642E-13 -5.6696E-13 -3.5074E-13  3.8679E-13 -1.4578E-13 -6.9531E-12
 -5.6749E-13  4.2931E-13  1.8190E-13 -1.4578E-13  5.6426E-13  5.5507E-12
 -1.1267E-11  1.8642E-11  4.0165E-12 -6.9531E-12  5.5507E-12  2.2910E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
  -26.441330    7.214607   -0.969733   -0.071784   -0.144800  2457011.618298
# Heliocentric elements and errors
Epoch:              2457010.5000  =  2014/12/19
Mean Anomaly:          109.36192 +/-     0.538
Argument of Peri:      122.10185 +/-     0.527
Long of Asc Node:      138.23581 +/-     0.002
Inclination:            32.72048 +/-     0.001
Eccentricity:         0.03478380 +/-    0.0006
Semi-Major Axis:     42.85685057 +/-    0.0060
Time of Perihelion: 2425879.5466 +/-     153.0
Perihelion:          41.36612660 +/-    0.0268
Aphelion:            44.34757454 +/-    0.0269
Period (y)              280.5683 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           38.44860062 +/-    0.0012
Ecliptic Y            5.84651052 +/-    0.0002
Ecliptic Z          -19.25565333 +/-    0.0006
Ecliptic XDOT        -0.00068337 +/-    0.0000
Ecliptic YDOT         0.00235877 +/-    0.0000
Ecliptic ZDOT        -0.00083795 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.39650631 +/-    0.0011
Geocenter to KBO     43.24320854 +/-    0.0014
# Hcoef:  7.32

The following table shows the complete astrometric record for 15QY33. 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 (15QY33) followed by the observatory code and reference code for the source of the astrometry.

2014 12  20.11752  01 10 02.983  -21 20 03.27  23.5r 15QY33    W84  C~55Wd      
2015 08  24.38998  01 22 36.010  -20 42 02.71  23.7r 15QY33    W84  C~55Wd      
2015 08  24.39272  01 22 35.998  -20 42 03.04  24.5g 15QY33    W84  C~55Wd      
2015 10  07.22783  01 19 49.894  -21 12 05.59  23.5i 15QY33    W84  C~55Wd      
2015 11  06.10918  01 17 34.136  -21 22 02.94  23.5i 15QY33    W84  C~55Wd      
2015 11  06.11056  01 17 34.134  -21 22 02.92  23.1r 15QY33    W84  C~55Wd      
2016 11  05.26588  01 23 00.028  -21 15 06.09  23.5i 15QY33    W84  C~55Wd      
2016 12  21.11576  01 20 44.275  -21 06 48.80  23.7r 15QY33    W84  C~55Wd      
2017 09  26.26297  01 31 27.285  -20 50 52.00  24.3r 15QY33    W84  C~55Wd      
2017 09  26.26574  01 31 27.274  -20 50 52.00  23.8g 15QY33    W84  C~55Wd      

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    -0.03
     2   0.6770  10502.22     0.01   -2507.23     0.02
     3   0.6770  10501.92    -0.14   -2507.45    -0.13
     4   0.7970   7613.95     0.18   -3103.73     0.14
     5   0.8788   5643.58    -0.03   -2813.26    -0.01
     6   0.8788   5643.57     0.03   -2813.23    -0.01
     7   1.8786   9927.13     0.13   -4437.87    -0.07
     8   2.0041   8437.92    -0.10   -3152.68     0.15
     9   2.7684  16961.45    -0.05   -6330.96    -0.08
    10   2.7684  16961.32     0.01   -6330.89     0.01

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.

15QY33    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        43.205    43.225    43.186
ecceobj         0.034     0.035     0.033
incobj         32.654    32.655    32.654
qmin           40.843    40.815    40.842
qmax           45.266    45.393    45.215
amean          42.976    42.995    42.956
amin           42.647    42.674    42.630
amax           43.307    43.331    43.290
emean           0.035     0.036     0.034
emin            0.025     0.026     0.025
emax            0.046     0.048     0.045
imean          31.378    31.378    31.378
imin           31.133    31.128    31.130
imax           31.640    31.638    31.633
excite_mean     0.522     0.522     0.522
fracstop        1.000     1.000     1.000
cjmean          2.740     2.740     2.740

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       180.0     180.2     179.9
kozaiamp        180.0     180.0     179.9