Orbit Fit and Astrometric record for 15TP361

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: 15TP361   
# Created Wed Dec  8 02:13:35 2021
# Orbit generated from Bernstein formalism
# Fitting     21 observations of     21
# Arc:   2.87y
# First observation: 2013/10/13
#  Last observation: 2016/08/25
Preliminary a, adot, b, bdot, g, gdot:
   0.000098   0.022522  -0.000032  -0.002738   0.023850   0.000000
# Chi-squared of fit:     3.10 DOF:     36 RMS:  0.07
# Min/Max residuals:    -0.16    0.15
# Exact a, adot, b, bdot, g, gdot:
  1.465466E-05  2.270473E-02 -2.105262E-06 -2.773364E-03  2.446778E-02  2.634221E-03
# Covariance matrix:
  1.0346E-12 -9.6210E-13 -4.2511E-14  7.4244E-14 -4.2418E-13 -8.9680E-12
 -9.6210E-13  1.4368E-12  9.8493E-14 -1.6739E-13  1.5229E-12  1.9515E-11
 -4.2511E-14  9.8493E-14  6.0851E-13 -3.0331E-13  1.6109E-13  1.6540E-12
  7.4244E-14 -1.6739E-13 -3.0331E-13  1.8193E-13 -2.6442E-13 -2.7787E-12
 -4.2418E-13  1.5229E-12  1.6109E-13 -2.6442E-13  3.5860E-12  2.9357E-11
 -8.9680E-12  1.9515E-11  1.6540E-12 -2.7787E-12  2.9357E-11  3.1887E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -6.854134   13.653070   -0.105104   -0.118247   -0.984768  2456578.715098
# Heliocentric elements and errors
Epoch:              2456570.5000  =  2013/10/05
Mean Anomaly:          111.81208 +/-     0.158
Argument of Peri:       99.26372 +/-     0.151
Long of Asc Node:      150.21700 +/-     0.004
Inclination:             9.65872 +/-     0.001
Eccentricity:         0.12954107 +/-    0.0006
Semi-Major Axis:     39.42790256 +/-    0.0064
Time of Perihelion: 2428484.4813 +/-      39.0
Perihelion:          34.32036978 +/-    0.0259
Aphelion:            44.53543534 +/-    0.0263
Period (y)              247.5789 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           40.36971649 +/-    0.0030
Ecliptic Y            9.91737710 +/-    0.0008
Ecliptic Z           -4.87764548 +/-    0.0004
Ecliptic XDOT        -0.00035746 +/-    0.0000
Ecliptic YDOT         0.00252767 +/-    0.0000
Ecliptic ZDOT        -0.00034315 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.85522433 +/-    0.0029
Geocenter to KBO     40.87006915 +/-    0.0032
# Hcoef:  7.48

The following table shows the complete astrometric record for 15TP361. 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 (15TP361) followed by the observatory code and reference code for the source of the astrometry.

2013 10  13.21432  01 00 52.759  -00 55 56.70  23.4i 15TP361   W84  C~52UG      
2014 10  03.30739  01 06 40.306  -00 29 37.76  23.1r 15TP361   W84  C~52UG      
2014 10  21.25242  01 05 19.574  -00 38 14.97  23.5r 15TP361   W84  C~52UG      
2014 10  21.25516  01 05 19.565  -00 38 14.90  23.0i 15TP361   W84  C~52UG      
2014 11  16.02735  01 03 35.408  -00 47 37.49  23.7i 15TP361   W84  C~52UG      
2015 09  04.30277  01 13 37.055  +00 06 17.09  22.9z 15TP361   W84  C~52UG      
2015 10  10.288962 01 11 09.873  -00 11 49.25  24.1r 15TP361   568  C~2TuU      
2015 10  10.333304 01 11 09.664  -00 11 50.59  23.8r 15TP361   568  C~2TuU      
2015 10  10.365520 01 11 09.517  -00 11 51.49  23.7r 15TP361   568  C~2TuU      
2015 10  10.367656 01 11 09.508  -00 11 51.56  23.6r 15TP361   568  C~2TuU      
2015 10  10.397632 01 11 09.366  -00 11 52.47  23.6r 15TP361   568  C~2TuU      
2015 10  10.406203 01 11 09.328  -00 11 52.72  23.5r 15TP361   568  C~2TuU      
2015 10  14.271856 01 10 51.860  -00 13 44.71  24.4g 15TP361   568  C~2TuU      
2015 10  14.313316 01 10 51.673  -00 13 45.94  24.3g 15TP361   568  C~2TuU      
2015 10  14.345429 01 10 51.521  -00 13 46.82  24.3g 15TP361   568  C~2TuU      
2015 10  14.377439 01 10 51.373  -00 13 47.75  24.4g 15TP361   568  C~2TuU      
2015 10  14.385968 01 10 51.338  -00 13 48.00  24.4g 15TP361   568  C~2TuU      
2015 11  02.12028  01 09 28.956  -00 21 53.95  23.3r 15TP361   W84  C~52UG      
2016 08  16.40088  01 19 21.950  +00 35 03.56  23.0i 15TP361   W84  C~52UG      
2016 08  16.40224  01 19 21.968  +00 35 03.38  24.1r 15TP361   W84  C~52UG      
2016 08  25.39991  01 19 00.765  +00 31 21.75  23.2z 15TP361   W84  C~52UG      

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     0.00       0.00     0.06
     2   0.9722   5419.07     0.11    -560.09     0.03
     3   1.0213   4101.63    -0.13    -568.54    -0.08
     4   1.0213   4101.54    -0.03    -568.42     0.03
     5   1.0919   2442.86     0.07    -482.91    -0.01
     6   1.8921  12029.55    -0.03    -992.90    -0.12
     7   1.9906   9566.66     0.06   -1140.12    -0.01
     8   1.9907   9563.25    -0.04   -1140.14    -0.01
     9   1.9908   9560.86    -0.01   -1140.12     0.03
    10   1.9908   9560.71     0.00   -1140.13     0.01
    11   1.9909   9558.39    -0.07   -1140.15     0.01
    12   1.9909   9557.76    -0.05   -1140.16     0.00
    13   2.0015   9272.22     0.04   -1141.99     0.02
    14   2.0016   9269.16     0.06   -1142.03    -0.04
    15   2.0017   9266.71     0.01   -1141.96     0.02
    16   2.0018   9264.30    -0.00   -1141.96     0.01
    17   2.0018   9263.71     0.05   -1141.99    -0.02
    18   2.0531   7933.89    -0.06   -1111.69    -0.09
    19   2.8424  17496.30    -0.16   -1404.67     0.11
    20   2.8424  17496.48     0.07   -1404.94    -0.15
    21   2.8670  17114.82     0.10   -1486.47     0.15

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.

15TP361    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.635    39.655    39.614
ecceobj         0.129     0.129     0.129
incobj          9.635     9.635     9.636
qmin           32.959    32.919    32.943
qmax           46.244    46.215    46.135
amean          39.457    39.457    39.457
amin           39.127    39.132    39.133
amax           39.828    39.816    39.836
emean           0.141     0.142     0.141
emin            0.122     0.123     0.119
emax            0.161     0.162     0.161
imean           8.609     8.548     8.666
imin            7.912     7.913     7.918
imax            9.300     9.313     9.362
excite_mean     0.206     0.206     0.206
fracstop        1.000     1.000     1.000
cjmean          3.004     3.004     3.004

libcent 0       179.4     179.3     179.2
libamp  0        24.9      23.8      33.1
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       181.2     180.6     181.1
kozaiamp        180.0     180.0     180.0