Orbit Fit and Astrometric record for 15KH173

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: 15KH173   
# Created Sat Dec  4 02:13:24 2021
# Orbit generated from Bernstein formalism
# Fitting     29 observations of     29
# Arc:   2.83y
# First observation: 2014/05/30
#  Last observation: 2017/03/30
Preliminary a, adot, b, bdot, g, gdot:
   0.000595   0.044686   0.000054   0.005814   0.034669   0.000000
# Chi-squared of fit:     5.35 DOF:     52 RMS:  0.08
# Min/Max residuals:    -0.29    0.14
# Exact a, adot, b, bdot, g, gdot:
  2.032719E-05  4.587579E-02  3.619027E-06  5.947000E-03  3.553757E-02  5.106628E-03
# Covariance matrix:
  3.1844E-13 -3.7607E-13  1.1384E-14 -2.8145E-14 -8.8085E-14 -1.9697E-12
 -3.7607E-13  6.3014E-13 -2.3401E-14  5.7512E-14  1.6901E-13  4.0379E-12
  1.1384E-14 -2.3401E-14  1.9427E-13 -1.2100E-13 -8.3982E-15 -1.7957E-13
 -2.8145E-14  5.7512E-14 -1.2100E-13  1.0575E-13  2.6249E-14  4.5081E-13
 -8.8085E-14  1.6901E-13 -8.3982E-15  2.6249E-14  2.5693E-13  1.6285E-12
 -1.9697E-12  4.0379E-12 -1.7957E-13  4.5081E-13  1.6285E-12  3.1289E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    6.569099 -126.245587   -0.264132    0.112144   -0.973370  2456807.894078
# Heliocentric elements and errors
Epoch:              2456800.5000  =  2014/05/23
Mean Anomaly:           17.00605 +/-     0.012
Argument of Peri:        9.52440 +/-     0.025
Long of Asc Node:      193.69262 +/-     0.002
Inclination:             9.70554 +/-     0.000
Eccentricity:         0.28803680 +/-    0.0001
Semi-Major Axis:     39.54743205 +/-    0.0038
Time of Perihelion: 2452509.3200 +/-       3.0
Perihelion:          28.15631638 +/-    0.0046
Aphelion:            50.93854772 +/-    0.0061
Period (y)              248.7056 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -16.89567699 +/-    0.0002
Ecliptic Y          -23.48990277 +/-    0.0003
Ecliptic Z            3.21932902 +/-    0.0000
Ecliptic XDOT         0.00264505 +/-    0.0000
Ecliptic YDOT        -0.00236623 +/-    0.0000
Ecliptic ZDOT         0.00050029 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   29.11363104 +/-    0.0003
Geocenter to KBO     28.13923579 +/-    0.0004
# Hcoef:  9.94

The following table shows the complete astrometric record for 15KH173. 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 (15KH173) followed by the observatory code and reference code for the source of the astrometry.

2014 05  30.39330  15 32 09.554  -12 20 28.96  25.0r 15KH173   568  C~2lVF      
2014 06  01.32025  15 31 57.552  -12 19 45.83  24.5r 15KH173   568  C~2lVF      
2014 06  22.30598  15 29 59.693  -12 13 38.61  24.6r 15KH173   568  C~2lVF      
2014 06  22.34880  15 29 59.479  -12 13 38.00  24.7r 15KH173   568  C~2lVF      
2015 02  25.63010  15 49 25.592  -13 16 24.69  24.7r 15KH173   568  C~2lVF      
2015 03  19.62451  15 49 10.159  -13 09 20.97  24.2r 15KH173   568  C~2lVF      
2015 04  13.55598  15 47 39.926  -12 58 32.59  24.5r 15KH173   568  C~2lVF      
2015 04  13.59705  15 47 39.726  -12 58 31.41  24.6r 15KH173   568  C~2lVF      
2015 04  18.56045  15 47 14.379  -12 56 11.45  24.8r 15KH173   568  C~2lVF      
2015 05  21.32647  15 43 53.679  -12 41 19.11  24.6r 15KH173   568  C~2lVF      
2015 05  21.36772  15 43 53.420  -12 41 18.06  24.2r 15KH173   568  C~2lVF      
2015 05  21.40894  15 43 53.141  -12 41 17.07  24.8r 15KH173   568  C~2lVF      
2015 05  22.48541  15 43 46.125  -12 40 50.93  24.5r 15KH173   568  C~2lVF      
2015 05  25.47599  15 43 26.740  -12 39 39.89  24.6r 15KH173   568  C~2lVF      
2015 06  20.36530  15 40 51.538  -12 31 36.56  24.8r 15KH173   568  C~2lVF      
2015 06  20.40617  15 40 51.321  -12 31 36.15  24.7r 15KH173   568  C~2lVF      
2015 06  23.42643  15 40 35.769  -12 30 58.12  24.2r 15KH173   568  C~2lVF      
2015 07  11.29956  15 39 20.522  -12 28 45.54  24.5r 15KH173   568  C~2lVF      
2015 07  11.30916  15 39 20.487  -12 28 45.48  24.7r 15KH173   568  C~2lVF      
2015 07  18.36957  15 38 59.946  -12 28 38.54  24.8r 15KH173   568  C~2lVF      
2016 04  03.57092  15 58 53.346  -13 17 07.70  25.1w 15KH173   568  C~2lVF      
2016 04  08.62048  15 58 33.101  -13 14 56.37  25.4w 15KH173   568  C~2lVF      
2016 04  09.56442  15 58 29.032  -13 14 31.32  24.6w 15KH173   568  C~2lVF      
2016 04  29.51761  15 56 45.235  -13 05 33.39  24.5w 15KH173   568  C~2lVF      
2016 05  04.49023  15 56 15.272  -13 03 21.12  24.7w 15KH173   568  C~2lVF      
2016 07  04.32248  15 50 15.906  -12 45 03.42  24.6w 15KH173   568  C~2lVF      
2016 07  05.39482  15 50 11.421  -12 44 57.28  24.3w 15KH173   568  C~2lVF      
2017 01  31.65858  16 08 41.487  -13 46 01.04  24.9w 15KH173   568  C~2lVF      
2017 03  30.59606  16 09 32.290  -13 31 25.95  24.8w 15KH173   568  C~2lVF      

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    -0.20
     2   0.0053   -181.08     0.02      -0.50     0.07
     3   0.0627  -1946.12     0.03     -61.90     0.08
     4   0.0628  -1949.31     0.02     -62.07     0.14
     5   0.7426  15547.80     0.09     263.68    -0.29
     6   0.8028  15231.28    -0.01     626.92    -0.01
     7   0.8711  13793.49    -0.04     961.83    -0.05
     8   0.8712  13790.37     0.04     962.31    -0.01
     9   0.8848  13396.07    -0.09    1014.75     0.05
    10   0.9745  10324.13    -0.09    1213.02     0.02
    11   0.9746  10320.19     0.10    1213.17     0.12
    12   0.9747  10315.98     0.02    1213.19     0.08
    13   0.9777  10209.78    -0.05    1215.00     0.00
    14   0.9859   9916.65    -0.02    1218.78    -0.02
    15   1.0567   7590.22    -0.06    1162.44     0.01
    16   1.0568   7587.03     0.01    1162.09    -0.11
    17   1.0651   7356.40     0.01    1146.00    -0.03
    18   1.1140   6252.73    -0.03    1017.29     0.03
    19   1.1141   6252.22    -0.06    1017.23     0.06
    20   1.1334   5957.87    -0.04     953.42     0.04
    21   1.8458  23717.73    -0.08    2055.89     0.11
    22   1.8596  23396.67     0.07    2120.61    -0.10
    23   1.8622  23332.44     0.04    2132.28    -0.01
    24   1.9168  21716.82    -0.07    2328.91     0.07
    25   1.9305  21255.76     0.06    2362.48    -0.03
    26   2.0970  15844.66     0.07    2267.88    -0.07
    27   2.0999  15778.95     0.09    2259.10     0.06
    28   2.6756  32632.81     0.04    2174.97     0.00
    29   2.8342  33192.86    -0.08    3196.97    -0.02

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.

15KH173    quality flag:3

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

axisobj        39.256    39.270    39.242
ecceobj         0.282     0.283     0.282
incobj          9.732     9.732     9.732
qmin           27.146    27.159    27.121
qmax           52.489    52.399    52.405
amean          39.455    39.455    39.455
amin           38.990    38.985    39.011
amax           40.017    40.040    40.006
emean           0.294     0.294     0.294
emin            0.276     0.275     0.276
emax            0.312     0.311     0.311
imean           9.316     9.362     9.249
imin            8.435     8.546     8.345
imax           10.132    10.124    10.095
excite_mean     0.336     0.336     0.335
fracstop        1.000     1.000     1.000
cjmean          2.922     2.922     2.922

libcent 0       180.5     180.1     180.0
libamp  0        78.0      85.0      72.7
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       178.3     171.1     185.1
kozaiamp        180.0     180.0     180.0