Orbit Fit and Astrometric record for 15GQ54

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: 15GQ54    
# Created Wed Feb 20 02:10:30 2019
# Orbit generated from Bernstein formalism
# Fitting   34 observations of   34
# Arc:   2.44y
# First observation: 2015/02/17
#  Last observation: 2017/07/27
Preliminary a, adot, b, bdot, g, gdot:
  -0.000087   0.019639   0.000012   0.003649   0.022730   0.000000
# Chi-squared of fit:    14.81 DOF:   62 RMS:  0.12
# Min/Max residuals:    -0.26    0.35
# Exact a, adot, b, bdot, g, gdot:
  1.373086E-05  1.966979E-02  2.682043E-06  3.674264E-03  2.288399E-02  2.932063E-03
# Covariance matrix:
  2.0540E-13 -3.6304E-16 -6.0408E-15  2.1689E-14  1.5244E-13  2.6865E-12
 -3.6304E-16  2.2171E-13 -1.3858E-14  5.2001E-14  1.5799E-13  6.5040E-12
 -6.0408E-15 -1.3858E-14  1.0132E-13 -7.0619E-14 -1.4847E-14 -6.1933E-13
  2.1689E-14  5.2001E-14 -7.0619E-14  9.4661E-14  5.4664E-14  2.3270E-12
  1.5244E-13  1.5799E-13 -1.4847E-14  5.4664E-14  2.5885E-13  6.8090E-12
  2.6865E-12  6.5040E-12 -6.1933E-13  2.3270E-12  6.8090E-12  2.9113E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.723582 -158.277393    0.791309    0.017798   -0.586784  2457071.068908
# Heliocentric elements and errors
Epoch:              2457070.5000  =  2015/02/17
Mean Anomaly:          125.76316 +/-     0.197
Argument of Peri:      229.07481 +/-     0.186
Long of Asc Node:      191.66102 +/-     0.001
Inclination:            10.70426 +/-     0.001
Eccentricity:         0.17611493 +/-    0.0005
Semi-Major Axis:     39.53507220 +/-    0.0069
Time of Perihelion: 2425351.2315 +/-      49.1
Perihelion:          32.57235592 +/-    0.0190
Aphelion:            46.49778848 +/-    0.0199
Period (y)              248.5891 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -41.41815715 +/-    0.0009
Ecliptic Y          -15.64826495 +/-    0.0003
Ecliptic Z            1.31447139 +/-    0.0000
Ecliptic XDOT         0.00055389 +/-    0.0000
Ecliptic YDOT        -0.00231664 +/-    0.0000
Ecliptic ZDOT         0.00045004 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   44.29514389 +/-    0.0009
Geocenter to KBO     43.69867887 +/-    0.0010
# Hcoef:  8.09

The following table shows the complete astrometric record for 15GQ54. 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 (15GQ54) followed by the observatory code and reference code for the source of the astrometry.

2015 02  17.56813  13 22 54.568  -06 52 00.22  23.9r 15GQ54    568  C~2lV8      
2015 02  17.60905  13 22 54.466  -06 51 59.42  24.4r 15GQ54    568  C~2lV8      
2015 03  18.54653  13 21 23.974  -06 41 04.34  24.6r 15GQ54    568  C~2lV8      
2015 03  18.58746  13 21 23.821  -06 41 03.42  24.3r 15GQ54    568  C~2lV8      
2015 03  20.55033  13 21 16.161  -06 40 10.86  24.6r 15GQ54    568  C~2lV8      
2015 04  11.48481  13 19 44.057  -06 29 56.43  24.6r 15GQ54    568  C~2lV8      
2015 04  13.34921  13 19 35.998  -06 29 03.73  24.6r 15GQ54    568  C~2lV8      
2015 04  13.39016  13 19 35.822  -06 29 02.70  24.6r 15GQ54    568  C~2lV8      
2015 04  13.45967  13 19 35.508  -06 29 00.72  24.2r 15GQ54    568  C~2lV8      
2015 04  19.39003  13 19 09.898  -06 26 14.30  24.4r 15GQ54    568  C~2lV8      
2015 05  18.25525  13 17 16.935  -06 14 16.55  24.4r 15GQ54    568  C~2lV8      
2015 06  20.26264  13 16 00.492  -06 06 28.86  24.4r 15GQ54    568  C~2lV8      
2015 06  20.30355  13 16 00.440  -06 06 28.61  24.3r 15GQ54    568  C~2lV8      
2015 06  22.30724  13 15 58.329  -06 06 16.31  24.5r 15GQ54    568  C~2lV8      
2015 07  14.25857  13 15 56.399  -06 06 12.69  24.6r 15GQ54    568  C~2lV8      
2015 07  20.24993  13 16 02.725  -06 06 53.88  24.1r 15GQ54    568  C~2lV8      
2015 07  20.26062  13 16 02.744  -06 06 53.95  24.0r 15GQ54    568  C~2lV8      
2016 02  04.54710  13 27 47.619  -07 08 33.12  24.6w 15GQ54    568  C~2lV8      
2016 02  10.53503  13 27 39.750  -07 07 17.38  24.6w 15GQ54    568  C~2lV8      
2016 03  11.53623  13 26 20.855  -06 57 18.84  24.9w 15GQ54    568  C~2lV8      
2016 04  03.42508  13 24 50.033  -06 47 03.55  24.5w 15GQ54    568  C~2lV8      
2016 04  09.40482  13 24 24.312  -06 44 15.09  24.4w 15GQ54    568  C~2lV8      
2016 05  02.29500  13 22 47.314  -06 33 54.72  25.0w 15GQ54    568  C~2lV8      
2016 05  06.30476  13 22 31.421  -06 32 15.35  25.2w 15GQ54    568  C~2lV8      
2016 05  28.26791  13 21 16.897  -06 24 37.21  24.7w 15GQ54    568  C~2lV8      
2016 06  04.34936  13 20 58.618  -06 22 47.77  24.7w 15GQ54    568  C~2lV8      
2016 06  27.26867  13 20 24.093  -06 19 30.60  25.0w 15GQ54    568  C~2lV8      
2016 07  06.30443  13 20 21.778  -06 19 22.85  24.7w 15GQ54    568  C~2lV8      
2017 02  24.62428  13 31 39.638  -07 16 15.57        15GQ54    568  C~2lV8      
2017 02  24.63510  13 31 39.583  -07 16 15.27        15GQ54    568  C~2lV8      
2017 03  28.56025  13 29 49.075  -07 03 19.25        15GQ54    568  C~2lV8      
2017 03  28.56493  13 29 49.045  -07 03 19.37  24.7w 15GQ54    568  C~2lV8      
2017 06  21.28313  13 24 59.307  -06 33 27.02  24.8w 15GQ54    568  C~2lV8      
2017 07  27.26646  13 25 07.837  -06 34 53.41  24.0w 15GQ54    568  C~2lV8      

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    -0.03       0.00    -0.03
  2   0.0001     -1.71    -0.17       0.18    -0.00
  3   0.0793  -1496.65    -0.26     105.92     0.07
  4   0.0795  -1499.11    -0.08     105.93    -0.04
  5   0.0848  -1624.61    -0.03     112.13     0.04
  6   0.1449  -3127.42     0.00     169.76     0.03
  7   0.1500  -3258.55     0.17     173.75     0.01
  8   0.1501  -3261.37     0.27     173.72    -0.08
  9   0.1503  -3266.45     0.17     173.81    -0.11
 10   0.1665  -3682.82    -0.11     185.46    -0.01
 11   0.2455  -5514.07     0.15     220.56    -0.20
 12   0.3359  -6747.35    -0.05     226.54     0.07
 13   0.3360  -6748.16    -0.08     226.48     0.04
 14   0.3415  -6782.00    -0.04     226.06     0.07
 15   0.4016  -6810.07    -0.06     218.61     0.35
 16   0.4180  -6707.04    -0.06     215.84    -0.01
 17   0.4180  -6706.76     0.01     215.88     0.04
 18   0.9637   4420.64     0.05     696.73     0.08
 19   0.9801   4283.75     0.10     723.79     0.05
 20   1.0622   2970.69    -0.04     844.99    -0.24
 21   1.1249   1486.22     0.00     914.71    -0.05
 22   1.1412   1067.90    -0.03     928.83    -0.06
 23   1.2039   -504.36     0.22     967.28     0.06
 24   1.2149   -761.17     0.05     971.33    -0.06
 25   1.2750  -1962.69     0.06     982.55     0.00
 26   1.2944  -2256.36    -0.04     982.45     0.07
 27   1.3572  -2807.54     0.01     973.29    -0.17
 28   1.3819  -2842.46    -0.04     967.59    -0.04
 29   2.0207   7803.74     0.24    1541.00     0.10
 30   2.0207   7802.87    -0.16    1540.98     0.04
 31   2.1081   5985.91    -0.04    1656.51     0.03
 32   2.1081   5985.54    -0.09    1656.23    -0.26
 33   2.3401   1311.38     0.05    1724.23    -0.04
 34   2.4386   1461.49    -0.15    1691.19     0.24

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.

15GQ54    quality flag:3

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

axisobj        39.233    39.252    39.214
ecceobj         0.181     0.182     0.180
incobj         10.760    10.760    10.760
qmin           31.675    31.653    31.719
qmax           47.522    47.541    47.485
amean          39.456    39.456    39.456
amin           39.134    39.145    39.126
amax           39.818    39.812    39.840
emean           0.172     0.173     0.172
emin            0.149     0.150     0.147
emax            0.194     0.195     0.194
imean          10.927    10.912    10.939
imin           10.200    10.187    10.221
imax           11.669    11.674    11.676
excite_mean     0.256     0.257     0.256
fracstop        1.000     1.000     1.000
cjmean          2.977     2.977     2.977

libcent 0       180.0     179.9     180.1
libamp  0        19.6      11.5      30.3
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       176.4     177.4     175.3
kozaiamp        180.0     180.0     180.0