Orbit Fit and Astrometric record for 16QP134

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: 16QP134   
# Created Wed Dec  8 02:13:53 2021
# Orbit generated from Bernstein formalism
# Fitting     18 observations of     18
# Arc:   4.27y
# First observation: 2014/08/18
#  Last observation: 2018/11/26
Preliminary a, adot, b, bdot, g, gdot:
  -0.000446   0.016917   0.000334  -0.007606   0.020213   0.000000
# Chi-squared of fit:     5.31 DOF:     30 RMS:  0.10
# Min/Max residuals:    -0.23    0.20
# Exact a, adot, b, bdot, g, gdot:
  1.300422E-05  1.619284E-02 -6.229981E-06 -7.245900E-03  1.951400E-02 -1.008041E-02
# Covariance matrix:
  1.1637E-12 -8.0642E-13 -2.9826E-13  3.0588E-13 -4.3508E-13 -8.4569E-12
 -8.0642E-13  8.7951E-13  3.9701E-13 -4.0691E-13  7.0532E-13  1.1243E-11
 -2.9826E-13  3.9701E-13  9.2797E-13 -4.3837E-13  3.1309E-13  5.7632E-12
  3.0588E-13 -4.0691E-13 -4.3837E-13  2.9536E-13 -3.2030E-13 -5.9096E-12
 -4.3508E-13  7.0532E-13  3.1309E-13 -3.2030E-13  8.7085E-13  8.8321E-12
 -8.4569E-12  1.1243E-11  5.7632E-12 -5.9096E-12  8.8321E-12  1.6336E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.940547   -1.457723    0.559837   -0.043310   -0.845531  2456887.782258
# Heliocentric elements and errors
Epoch:              2456880.5000  =  2014/08/11
Mean Anomaly:          340.21639 +/-     0.052
Argument of Peri:      270.24000 +/-     0.013
Long of Asc Node:      171.55070 +/-     0.000
Inclination:            24.46438 +/-     0.001
Eccentricity:         0.63245238 +/-    0.0008
Semi-Major Axis:     93.28234839 +/-    0.1598
Time of Perihelion: 2474964.7578 +/-       7.9
Perihelion:          34.28570469 +/-    0.0949
Aphelion:           152.27899208 +/-    0.2713
Period (y)              900.9639 +/-      2.32
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           51.99111117 +/-    0.0024
Ecliptic Y           -1.88094921 +/-    0.0001
Ecliptic Z           -2.62918552 +/-    0.0002
Ecliptic XDOT        -0.00141121 +/-    0.0000
Ecliptic YDOT         0.00230413 +/-    0.0000
Ecliptic ZDOT        -0.00094260 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   52.09151781 +/-    0.0024
Geocenter to KBO     51.24526233 +/-    0.0025
# Hcoef:  6.31

The following table shows the complete astrometric record for 16QP134. 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 (16QP134) followed by the observatory code and reference code for the source of the astrometry.

2014 08  18.28148  23 59 20.008  -03 16 39.09  23.1z 16QP134   W84  C~52ZY      
2016 08  26.20509  00 07 13.102  -03 21 41.83  23.5r 16QP134   W84  C~52ZY      
2016 09  09.15907  00 06 26.923  -03 28 10.62  23.5i 16QP134   W84  C~52ZY      
2016 09  22.09563  00 05 40.597  -03 34 19.24  22.9r 16QP134   W84  C~52ZY      
2016 09  22.09701  00 05 40.599  -03 34 19.30  23.7g 16QP134   W84  C~52ZY      
2016 11  26.12104  00 02 36.082  -03 56 26.47  23.0i 16QP134   W84  C~52ZY      
2016 11  26.12241  00 02 36.087  -03 56 26.56  23.4r 16QP134   W84  C~52ZY      
2017 08  18.31325  00 11 53.552  -03 18 43.95  23.2r 16QP134   W84  C~52ZY      
2017 08  18.31463  00 11 53.540  -03 18 44.05  22.8i 16QP134   W84  C~52ZY      
2017 09  27.28309  00 09 39.087  -03 37 27.88  23.3r 16QP134   W84  C~52ZY      
2017 09  27.28445  00 09 39.072  -03 37 27.95  23.4i 16QP134   W84  C~52ZY      
2017 09  27.28584  00 09 39.066  -03 37 28.06  23.8g 16QP134   W84  C~52ZY      
2017 10  12.19051  00 08 45.286  -03 44 10.81  23.9g 16QP134   W84  C~52ZY      
2017 11  08.09902  00 07 23.349  -03 53 46.38  23.3g 16QP134   W84  C~52ZY      
2017 11  09.06567  00 07 20.998  -03 54 02.22  23.5r 16QP134   W84  C~52ZY      
2018 10  18.17681  00 12 46.768  -03 47 24.95  23.2z 16QP134   W84  C~52ZY      
2018 10  18.17817  00 12 46.760  -03 47 25.09  22.9i 16QP134   W84  C~52ZY      
2018 11  26.08382  00 11 07.207  -03 58 27.20  23.8g 16QP134   W84  C~52ZY      

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     0.02       0.00     0.07
     2   2.0231   6377.15     0.15   -3107.00    -0.08
     3   2.0613   5587.16     0.20   -3186.58    -0.06
     4   2.0967   4803.46    -0.13   -3246.96    -0.02
     5   2.0967   4803.47    -0.04   -3247.03    -0.08
     6   2.2747   1740.22    -0.06   -3360.08     0.08
     7   2.2747   1740.26     0.01   -3360.20    -0.03
     8   3.0008  10304.03     0.08   -4629.94     0.04
     9   3.0008  10303.83    -0.06   -4629.96     0.03
    10   3.1102   8003.98     0.01   -4851.42    -0.07
    11   3.1102   8003.75    -0.14   -4851.39    -0.04
    12   3.1102   8003.62    -0.18   -4851.46    -0.10
    13   3.1510   7103.22    -0.23   -4897.56     0.04
    14   3.2247   5747.33     0.18   -4933.40     0.15
    15   3.2273   5708.71     0.02   -4933.81     0.04
    16   4.1667  10344.33     0.08   -6529.81     0.03
    17   4.1667  10344.16    -0.01   -6529.89    -0.05
    18   4.2732   8709.52     0.13   -6537.02     0.03

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.

16QP134    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        94.720    95.182    94.264
ecceobj         0.636     0.638     0.633
incobj         24.346    24.346    24.346
qmin           33.501    33.536    33.491
qmax          156.906   158.471   156.180
amean          92.783    93.808    92.482
amin           90.949    91.951    90.267
amax           95.666    96.439    95.306
emean           0.622     0.633     0.622
emin            0.602     0.622     0.601
emax            0.640     0.644     0.639
imean          24.656    23.942    24.529
imin           23.627    23.548    23.476
imax           26.130    24.357    25.916
excite_mean     0.749     0.752     0.748
fracstop        1.000     1.000     1.000
cjmean          2.822     2.820     2.823

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       165.3     222.0     173.5
kozaiamp        180.0     180.0     180.0