Orbit Fit and Astrometric record for 15KK173

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: 15KK173   
# Created Fri Dec  3 02:13:21 2021
# Orbit generated from Bernstein formalism
# Fitting     30 observations of     30
# Arc:   2.23y
# First observation: 2015/02/25
#  Last observation: 2017/05/21
Preliminary a, adot, b, bdot, g, gdot:
  -0.000286   0.040864   0.000030  -0.005374   0.033141   0.000000
# Chi-squared of fit:     7.61 DOF:     54 RMS:  0.09
# Min/Max residuals:    -0.17    0.30
# Exact a, adot, b, bdot, g, gdot:
  2.005150E-05  4.034545E-02 -1.839352E-06 -5.316057E-03  3.286728E-02  6.795573E-03
# Covariance matrix:
  1.8344E-13 -7.5951E-14 -8.0412E-15 -3.7262E-16  1.0647E-13  1.0630E-13
 -7.5951E-14  5.7064E-13  2.0342E-15 -6.2023E-14  2.1227E-13  8.4427E-12
 -8.0412E-15  2.0342E-15  1.0175E-13 -8.3183E-14 -9.1334E-15  4.1318E-14
 -3.7262E-16 -6.2023E-14 -8.3183E-14  1.3721E-13 -2.9034E-14 -1.1845E-12
  1.0647E-13  2.1227E-13 -9.1334E-15 -2.9034E-14  2.3112E-13  4.0218E-12
  1.0630E-13  8.4427E-12  4.1318E-14 -1.1845E-12  4.0218E-12  1.6122E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    7.633044 -123.169360    0.973069    0.021978   -0.163042  2457079.117438
# Heliocentric elements and errors
Epoch:              2457070.5000  =  2015/02/17
Mean Anomaly:           23.08442 +/-     0.030
Argument of Peri:       94.03742 +/-     0.060
Long of Asc Node:      101.12462 +/-     0.002
Inclination:            10.46812 +/-     0.000
Eccentricity:         0.25874353 +/-    0.0003
Semi-Major Axis:     39.36451988 +/-    0.0067
Time of Perihelion: 2451285.9125 +/-       7.3
Perihelion:          29.17920514 +/-    0.0114
Aphelion:            49.54983462 +/-    0.0133
Period (y)              246.9822 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -17.40577768 +/-    0.0002
Ecliptic Y          -24.84723718 +/-    0.0004
Ecliptic Z            4.04130554 +/-    0.0001
Ecliptic XDOT         0.00247043 +/-    0.0000
Ecliptic YDOT        -0.00236324 +/-    0.0000
Ecliptic ZDOT        -0.00036362 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   30.60520287 +/-    0.0003
Geocenter to KBO     30.42539450 +/-    0.0004
# Hcoef:  9.09

The following table shows the complete astrometric record for 15KK173. 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 (15KK173) followed by the observatory code and reference code for the source of the astrometry.

2015 02  25.61666  15 45 19.173  -12 00 49.09  24.0r 15KK173   568  C~2lVF      
2015 03  19.64088  15 44 58.272  -11 55 14.26  24.1r 15KK173   568  C~2lVF      
2015 03  22.53917  15 44 50.989  -11 54 18.96  23.9r 15KK173   568  C~2lVF      
2015 03  22.62952  15 44 50.749  -11 54 17.32        15KK173   568  C~2lVF      
2015 04  13.57241  15 43 26.148  -11 46 26.40  24.0r 15KK173   568  C~2lVF      
2015 04  13.61353  15 43 25.938  -11 46 25.54  23.9r 15KK173   568  C~2lVF      
2015 04  18.58247  15 43 00.702  -11 44 32.42  23.7r 15KK173   568  C~2lVF      
2015 04  18.59119  15 43 00.659  -11 44 32.25  23.9r 15KK173   568  C~2lVF      
2015 05  21.34311  15 39 44.086  -11 32 59.96  24.0r 15KK173   568  C~2lVF      
2015 05  21.38417  15 39 43.828  -11 32 59.28  23.9r 15KK173   568  C~2lVF      
2015 05  21.42550  15 39 43.552  -11 32 58.59  24.0r 15KK173   568  C~2lVF      
2015 05  22.50179  15 39 36.739  -11 32 39.64  23.9r 15KK173   568  C~2lVF      
2015 05  25.49257  15 39 17.909  -11 31 48.56  23.8r 15KK173   568  C~2lVF      
2015 06  20.38172  15 36 47.761  -11 26 47.22  24.1r 15KK173   568  C~2lVF      
2015 06  20.42253  15 36 47.547  -11 26 46.97  24.0r 15KK173   568  C~2lVF      
2015 06  23.44287  15 36 32.539  -11 26 30.85  23.8r 15KK173   568  C~2lVF      
2015 07  12.30549  15 35 16.871  -11 26 33.06  24.0r 15KK173   568  C~2lVF      
2015 07  18.38638  15 35 00.117  -11 27 12.74  24.2r 15KK173   568  C~2lVF      
2016 02  06.64530  15 53 34.384  -12 50 25.54  24.4w 15KK173   568  C~2lVF      
2016 02  12.63085  15 53 51.986  -12 50 10.63  24.5w 15KK173   568  C~2lVF      
2016 03  15.64429  15 54 05.290  -12 44 37.19  24.7w 15KK173   568  C~2lVF      
2016 04  08.62452  15 52 51.570  -12 37 07.44  24.4w 15KK173   568  C~2lVF      
2016 04  09.56848  15 52 47.447  -12 36 47.79  24.1w 15KK173   568  C~2lVF      
2016 04  29.50952  15 51 03.880  -12 29 47.21  24.1w 15KK173   568  C~2lVF      
2016 05  04.48214  15 50 34.347  -12 28 04.98  24.2w 15KK173   568  C~2lVF      
2016 05  30.45796  15 47 51.745  -12 20 26.15  24.1w 15KK173   568  C~2lVF      
2016 07  04.31842  15 44 46.001  -12 16 10.70  24.2w 15KK173   568  C~2lVF      
2016 07  05.39078  15 44 41.702  -12 16 11.44  24.2w 15KK173   568  C~2lVF      
2017 03  28.61223  16 02 34.324  -13 27 52.40  22.8w 15KK173   568  C~2lVF      
2017 05  21.54276  15 57 56.464  -13 11 06.97  24.2w 15KK173   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    -0.13       0.00    -0.15
     2   0.0603   -373.55    -0.03     258.14     0.05
     3   0.0682   -490.08    -0.02     288.22    -0.04
     4   0.0685   -493.88     0.21     289.04    -0.12
     5   0.1286  -1809.79    -0.04     470.41     0.10
     6   0.1287  -1812.99    -0.09     470.56     0.01
     7   0.1423  -2199.55    -0.09     497.66    -0.05
     8   0.1423  -2200.21    -0.03     497.68    -0.07
     9   0.2320  -5170.85     0.09     519.65     0.14
    10   0.2321  -5174.69     0.19     519.45     0.11
    11   0.2322  -5178.80     0.06     519.20     0.04
    12   0.2351  -5280.68     0.04     514.88    -0.05
    13   0.2433  -5561.98    -0.04     501.64     0.04
    14   0.3142  -7781.82    -0.02     289.96     0.02
    15   0.3143  -7784.94    -0.05     289.48     0.01
    16   0.3226  -8003.70    -0.08     254.40     0.04
    17   0.3742  -9087.52    -0.02      -4.52     0.09
    18   0.3909  -9318.43     0.04    -100.20     0.10
    19   0.9474   7733.20     0.08   -1318.04     0.05
    20   0.9638   7981.78     0.02   -1248.15     0.03
    21   1.0514   8100.44     0.00    -880.44     0.02
    22   1.1171   6948.58    -0.09    -673.03    -0.17
    23   1.1196   6885.34    -0.01    -666.85    -0.09
    24   1.1742   5312.49    -0.07    -584.46    -0.08
    25   1.1879   4867.82     0.06    -578.75    -0.04
    26   1.2590   2442.27    -0.04    -652.67    -0.00
    27   1.3544   -268.94     0.04   -1006.82    -0.09
    28   1.3574   -330.20     0.01   -1021.60    -0.14
    29   2.0862  15944.50     0.11   -1855.97     0.30
    30   2.2339  11749.15    -0.11   -1716.86    -0.06

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.

15KK173    quality flag:3

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

axisobj        38.982    39.009    38.955
ecceobj         0.251     0.252     0.250
incobj         10.463    10.463    10.463
qmin           28.654    28.719    28.752
qmax           50.806    50.775    50.880
amean          39.455    39.455    39.456
amin           38.982    38.999    38.955
amax           39.994    40.016    40.013
emean           0.237     0.239     0.222
emin            0.201     0.205     0.187
emax            0.272     0.270     0.272
imean          10.811    10.860    11.584
imin            8.863     8.870     8.835
imax           12.905    12.550    13.113
excite_mean     0.303     0.305     0.300
fracstop        1.000     1.000     1.000
cjmean          2.947     2.946     2.949

libcent 0       180.0     180.7     179.2
libamp  0        96.9      84.1     107.5
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        97.2      91.2     160.5
kozaiamp         48.3      37.8     180.0