Orbit Fit and Astrometric record for 15KY174

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: 15KY174   
# Created Wed Feb 20 02:10:34 2019
# Orbit generated from Bernstein formalism
# Fitting   28 observations of   28
# Arc:   2.44y
# First observation: 2015/03/19
#  Last observation: 2017/08/26
Preliminary a, adot, b, bdot, g, gdot:
  -0.000112   0.016570  -0.000034  -0.005498   0.020156   0.000000
# Chi-squared of fit:     7.47 DOF:   50 RMS:  0.09
# Min/Max residuals:    -0.22    0.21
# Exact a, adot, b, bdot, g, gdot:
  1.360579E-05  1.659052E-02 -4.138438E-06 -5.609570E-03  2.021822E-02  6.416100E-03
# Covariance matrix:
  1.8102E-13  4.3188E-15  8.2962E-15 -4.9174E-14  1.4512E-13  4.1164E-12
  4.3188E-15  2.2331E-13  2.4874E-14 -1.1340E-13  1.8251E-13  9.1139E-12
  8.2962E-15  2.4874E-14  1.1594E-13 -9.8429E-14  2.5531E-14  2.0346E-12
 -4.9174E-14 -1.1340E-13 -9.8429E-14  2.0253E-13 -1.3283E-13 -8.7344E-12
  1.4512E-13  1.8251E-13  2.5531E-14 -1.3283E-13  3.0935E-13  1.0914E-11
  4.1164E-12  9.1139E-12  2.0346E-12 -8.7344E-12  1.0914E-11  6.9417E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    7.765206 -123.241107    0.843851    0.070695   -0.517574  2457101.145738
# Heliocentric elements and errors
Epoch:              2457100.5000  =  2015/03/19
Mean Anomaly:           57.45515 +/-     0.135
Argument of Peri:       60.34639 +/-     0.035
Long of Asc Node:       77.64376 +/-     0.001
Inclination:            19.91276 +/-     0.001
Eccentricity:         0.34006236 +/-    0.0014
Semi-Major Axis:     54.33297110 +/-    0.0603
Time of Perihelion: 2433754.0906 +/-      38.9
Perihelion:          35.85637257 +/-    0.0868
Aphelion:            72.80956963 +/-    0.1117
Period (y)              400.5008 +/-      0.67
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -27.85843632 +/-    0.0008
Ecliptic Y          -40.96217515 +/-    0.0011
Ecliptic Z            6.68260648 +/-    0.0002
Ecliptic XDOT         0.00134743 +/-    0.0000
Ecliptic YDOT        -0.00204313 +/-    0.0000
Ecliptic ZDOT        -0.00063517 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   49.98649314 +/-    0.0010
Geocenter to KBO     49.46034374 +/-    0.0014
# Hcoef:  7.65

The following table shows the complete astrometric record for 15KY174. 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 (15KY174) followed by the observatory code and reference code for the source of the astrometry.

2015 03  19.64496  15 45 09.388  -11 52 08.26  24.2r 15KY174   568  C~2lVL      
2015 03  22.56564  15 45 03.976  -11 51 34.79  24.8r 15KY174   568  C~2lVL      
2015 04  13.57652  15 44 05.397  -11 46 53.78  24.4r 15KY174   568  C~2lVL      
2015 04  13.61766  15 44 05.257  -11 46 53.07  24.3r 15KY174   568  C~2lVL      
2015 04  18.58658  15 43 48.370  -11 45 46.11  24.1r 15KY174   568  C~2lVL      
2015 05  21.34720  15 41 38.706  -11 38 57.95  24.3r 15KY174   568  C~2lVL      
2015 05  21.38827  15 41 38.533  -11 38 57.44  24.7r 15KY174   568  C~2lVL      
2015 05  21.42959  15 41 38.354  -11 38 57.06  24.6r 15KY174   568  C~2lVL      
2015 05  22.50587  15 41 33.862  -11 38 46.01  24.2r 15KY174   568  C~2lVL      
2015 05  25.49667  15 41 21.476  -11 38 15.99  24.3r 15KY174   568  C~2lVL      
2015 06  20.38581  15 39 41.532  -11 35 21.16  24.5r 15KY174   568  C~2lVL      
2015 06  20.42660  15 39 41.389  -11 35 20.87  24.5r 15KY174   568  C~2lVL      
2015 06  23.44700  15 39 31.194  -11 35 12.10  25.0r 15KY174   568  C~2lVL      
2015 07  18.39769  15 38 25.636  -11 35 42.50  24.2r 15KY174   568  C~2lVL      
2016 02  06.63317  15 48 40.723  -12 27 35.56  24.7w 15KY174   568  C~2lVL      
2016 02  12.61871  15 48 48.980  -12 27 25.95  24.7w 15KY174   568  C~2lVL      
2016 03  15.62688  15 48 43.500  -12 23 57.30  24.3w 15KY174   568  C~2lVL      
2016 04  03.54663  15 48 03.590  -12 20 23.04  24.9w 15KY174   568  C~2lVL      
2016 04  08.59619  15 47 49.066  -12 19 19.38  25.3w 15KY174   568  C~2lVL      
2016 04  29.49739  15 46 36.129  -12 14 50.52  24.8w 15KY174   568  C~2lVL      
2016 05  04.47001  15 46 16.534  -12 13 48.31  24.7w 15KY174   568  C~2lVL      
2016 05  30.45796  15 44 29.779  -12 09 12.12  24.7w 15KY174   568  C~2lVL      
2016 07  04.31032  15 42 27.009  -12 06 44.84  25.0w 15KY174   568  C~2lVL      
2016 07  05.38268  15 42 24.091  -12 06 45.86  24.7w 15KY174   568  C~2lVL      
2017 03  30.57730  15 51 42.823  -12 52 04.77  24.9w 15KY174   568  C~2lVL      
2017 07  28.31662  15 45 07.814  -12 39 22.09        15KY174   568  C~2lVL      
2017 08  20.25685  15 44 59.270  -12 43 18.69  24.9w 15KY174   568  C~2lVL      
2017 08  26.26800  15 45 03.763  -12 44 43.49  25.3w 15KY174   568  C~2lVL      

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    -0.05
  2   0.0080    -84.91    -0.07      14.92     0.08
  3   0.0683   -986.00    -0.02      96.78     0.07
  4   0.0684   -988.16    -0.09      97.01     0.21
  5   0.0820  -1244.84     0.03     106.76     0.07
  6   0.1717  -3192.59     0.13      76.10    -0.04
  7   0.1718  -3195.19     0.12      76.02     0.04
  8   0.1719  -3197.83     0.07      75.79    -0.02
  9   0.1748  -3264.63    -0.09      71.65    -0.17
 10   0.1830  -3448.73    -0.02      59.77     0.02
 11   0.2539  -4919.19    -0.03    -103.07     0.03
 12   0.2540  -4921.30    -0.06    -103.27     0.17
 13   0.2623  -5069.26     0.03    -128.83    -0.05
 14   0.3306  -6000.91     0.08    -378.32    -0.22
 15   0.8870   3493.08     0.13   -1389.13    -0.05
 16   0.9034   3608.99     0.07   -1353.20    -0.07
 17   0.9911   3484.81     0.06   -1167.23    -0.09
 18   1.0429   2867.09    -0.03   -1086.77    -0.07
 19   1.0567   2645.42    -0.21   -1071.56     0.11
 20   1.1139   1543.30     0.09   -1045.55    -0.09
 21   1.1275   1249.40    -0.01   -1048.56     0.04
 22   1.1987   -338.06     0.06   -1127.72    -0.01
 23   1.2941  -2125.75    -0.06   -1388.07     0.10
 24   1.2970  -2167.22    -0.01   -1398.70    -0.17
 25   2.0313   6416.47     0.02   -2241.92     0.03
 26   2.3591    608.99     0.10   -2767.90     0.05
 27   2.4219    539.84    -0.05   -3026.47    -0.02
 28   2.4384    622.84    -0.11   -3094.50     0.08

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.

15KY174    quality flag:2

Type:       SCATNEAR  SCATNEAR12:5EEEEEE

axisobj        53.718    53.882    53.556
ecceobj         0.335     0.339     0.331
incobj         19.939    19.939    19.939
qmin           35.012    34.934    35.370
qmax           74.107    74.786    73.594
amean          54.174    54.387    53.973
amin           53.613    53.764    53.354
amax           54.911    55.139    54.752
emean           0.334     0.337     0.332
emin            0.316     0.318     0.319
emax            0.352     0.357     0.344
imean          18.779    18.840    18.525
imin           17.968    18.170    18.188
imax           19.474    19.512    18.948
excite_mean     0.464     0.467     0.460
fracstop        1.000     1.000     1.000
cjmean          2.950     2.948     2.953

libcent 0      -180.0    -180.0     184.6
libamp  0      -180.0    -180.0     151.8
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       173.2     174.3     185.6
kozaiamp        179.9     179.9     180.0