Orbit Fit and Astrometric record for 15GV54

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: 15GV54    
# Created Wed Feb 20 02:10:30 2019
# Orbit generated from Bernstein formalism
# Fitting   39 observations of   40
# Arc:   2.35y
# First observation: 2015/02/17
#  Last observation: 2017/06/24
Preliminary a, adot, b, bdot, g, gdot:
  -0.000069   0.029322   0.000004   0.000001   0.027762   0.000000
# Chi-squared of fit:    11.68 DOF:   72 RMS:  0.10
# Min/Max residuals:    -0.23    0.30
# Exact a, adot, b, bdot, g, gdot:
  1.638904E-05  2.895932E-02  1.845247E-07 -1.513259E-07  2.758949E-02 -6.007278E-03
# Covariance matrix:
  1.6187E-13  1.4377E-14 -1.9784E-15  9.6513E-16  1.3480E-13  1.7654E-12
  1.4377E-14  2.8101E-13 -2.6928E-15  2.0560E-15  1.9338E-13  5.9339E-12
 -1.9784E-15 -2.6928E-15  8.1318E-14 -6.1729E-14 -3.7509E-15 -7.1872E-14
  9.6513E-16  2.0560E-15 -6.1729E-14  8.5778E-14  2.2276E-15  6.0722E-14
  1.3480E-13  1.9338E-13 -3.7509E-15  2.2276E-15  2.6087E-13  5.2392E-12
  1.7654E-12  5.9339E-12 -7.1872E-14  6.0722E-14  5.2392E-12  1.8620E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    3.147604 -154.969859    0.823586    0.029835   -0.540016  2457071.097458
# Heliocentric elements and errors
Epoch:              2457070.5000  =  2015/02/17
Mean Anomaly:          300.87707 +/-     0.030
Argument of Peri:      174.19185 +/-     0.019
Long of Asc Node:      114.76673 +/-     0.011
Inclination:             3.10087 +/-     0.000
Eccentricity:         0.23397214 +/-    0.0005
Semi-Major Axis:     39.68857382 +/-    0.0099
Time of Perihelion: 2472069.0802 +/-       5.1
Perihelion:          30.40255329 +/-    0.0206
Aphelion:            48.97459435 +/-    0.0227
Period (y)              250.0382 +/-      0.09
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -33.63341418 +/-    0.0006
Ecliptic Y          -14.79476093 +/-    0.0003
Ecliptic Z            1.99020341 +/-    0.0000
Ecliptic XDOT         0.00175157 +/-    0.0000
Ecliptic YDOT        -0.00235763 +/-    0.0000
Ecliptic ZDOT        -0.00003266 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   36.79745113 +/-    0.0006
Geocenter to KBO     36.24568774 +/-    0.0007
# Hcoef:  9.14

The following table shows the complete astrometric record for 15GV54. 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 (15GV54) followed by the observatory code and reference code for the source of the astrometry.

2015 02  17.59668  13 37 23.885  -06 45 26.74  24.9r 15GV54    568  C~2lV8      
2015 02  17.63771  13 37 23.782  -06 45 25.94  24.1r 15GV54    568  C~2lV8      
2015 02  20.63083  13 37 16.747  -06 44 30.60  25.0r 15GV54    568  C~2lV8      
2015 03  18.57516  13 35 45.522  -06 34 00.65  24.4r 15GV54    568  C~2lV8      
2015 03  18.62254  13 35 45.319  -06 33 59.26  24.6r 15GV54    568  C~2lV8      
2015 03  20.57938  13 35 36.617  -06 33 03.35  24.5r 15GV54    568  C~2lV8      
2015 04  11.51365  13 33 49.564  -06 22 04.44  25.1r 15GV54    568  C~2lV8      
2015 04  13.37789  13 33 40.027  -06 21 07.96  24.3r 15GV54    568  C~2lV8      
2015 04  13.41891  13 33 39.807  -06 21 06.73  24.6r 15GV54    568  C~2lV8      
2015 04  13.42365  13 33 39.763  -06 21 06.67  24.9r 15GV54    568  C~2lV8      
2015 04  13.42846  13 33 39.750  -06 21 06.50  24.0r 15GV54    568  C~2lV8      
2015 04  13.43331  13 33 39.726  -06 21 06.39  24.5r 15GV54    568  C~2lV8      
2015 04  13.43815  13 33 39.697  -06 21 06.22  24.4r 15GV54    568  C~2lV8      
2015 04  13.52145  13 33 39.257  -06 21 03.39  24.2r 15GV54    568  C~2lV8      
2015 04  19.48929  13 33 08.592  -06 18 04.41  24.0r 15GV54    568  C~2lV8      
2015 04  19.53630  13 33 08.346  -06 18 02.99  24.4r 15GV54    568  C~2lV8      
2015 04  19.56015  13 33 08.252  -06 18 02.67  24.5r 15GV54    568  C~2lV8      
2015 05  18.34130  13 30 51.039  -06 05 28.55  24.4r 15GV54    568  C~2lV8      
2015 06  20.29133  13 29 12.762  -05 58 08.23  24.4r 15GV54    568  C~2lV8      
2015 06  20.33212  13 29 12.695  -05 58 07.95  24.5r 15GV54    568  C~2lV8      
2015 06  22.33610  13 29 09.675  -05 58 00.30  24.7r 15GV54    568  C~2lV8      
2015 07  20.28135  13 29 08.164  -06 00 23.18  24.9r 15GV54    568  C~2lV8      
2016 02  10.57151  13 43 53.487  -07 23 31.81  25.4w 15GV54    568  C~2lV8      
2016 02  10.61301  13 43 53.431  -07 23 31.23  25.2w 15GV54    568  C~2lV8      
2016 03  11.56297  13 42 31.539  -07 13 28.29  24.5w 15GV54    568  C~2lV8      
2016 04  03.44935  13 40 47.313  -07 02 34.56  25.1w 15GV54    568  C~2lV8      
2016 04  09.43049  13 40 16.934  -06 59 33.53  24.6w 15GV54    568  C~2lV8      
2016 05  01.45743  13 38 23.944  -06 48 50.58  24.9w 15GV54    568  C~2lV8      
2016 05  02.33152  13 38 19.622  -06 48 26.80  25.4w 15GV54    568  C~2lV8      
2016 05  02.36396  13 38 19.461  -06 48 25.85  24.5w 15GV54    568  C~2lV8      
2016 05  07.33487  13 37 55.257  -06 46 15.07  25.0w 15GV54    568  C~2lV8      
2016 05  28.29220  13 36 26.203  -06 38 41.66  24.7w 15GV54    568  C~2lV8      
2016 05  28.30434  13 36 26.150  -06 38 41.52  25.3w 15GV54    568  C~2lV8      
2016 05  29.31127  13 36 22.568  -06 38 24.70  24.4w 15GV54    568  C~2lV8      
2016 06  04.36963  13 36 02.442  -06 36 52.52  25.1w 15GV54    568  C~2lV8      
2016 06  27.34644  13 35 14.411  -06 34 05.52  25.0w 15GV54    568  C~2lV8      
2016 07  07.33613  13 35 08.994  -06 34 28.42  26.0w 15GV54    568  C~2lV8      
2017 02  27.64948  13 49 38.768  -07 54 54.72        15GV54    568  C~2lV8      
2017 03  30.48771  13 47 35.110  -07 41 36.98  24.8w 15GV54    568  C~2lV8      
2017 06  24.30392  13 41 36.540  -07 10 41.47  24.9w 15GV54    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     0.04       0.00    -0.04
  2   0.0001     -1.72    -0.10       0.19    -0.02
  3   0.0083   -119.45     0.03      13.72     0.05
  4   0.0793  -1614.64     0.00     106.75    -0.02
  5   0.0795  -1617.96     0.11     106.95     0.07
  6   0.0848  -1759.10    -0.19     111.86    -0.00
  7   0.1449  -3485.38    -0.14     144.42     0.09
  8   0.1500  -3638.41     0.15     145.17     0.06
  9   0.1501  -3641.91     0.08     145.12     0.02
 10   0.1501  -3642.55    -0.15     144.93    -0.16
 11   0.1501  -3642.79     0.01     145.02    -0.07
 12   0.1501  -3643.16     0.04     144.99    -0.10
 13   0.1501  -3643.63    -0.02     144.99    -0.10
 14   0.1504  -3650.77    -0.19     145.24     0.16
 15   0.1667  -4141.91     0.10     145.11     0.06
 16   0.1668  -4145.84     0.08     145.10     0.08
 17   0.1669  -4147.26 (   0.64)    144.88 (  -0.12)
 18   0.2457  -6328.92     0.18      99.15    -0.23
 19   0.3359  -7856.13     0.01     -28.16    -0.05
 20   0.3360  -7857.17     0.00     -28.27     0.05
 21   0.3415  -7901.95     0.01     -37.68     0.15
 22   0.4180  -7870.49    -0.14    -178.97     0.05
 23   0.9801   6235.24     0.04     -35.10    -0.10
 24   0.9802   6234.25     0.08     -34.86    -0.04
 25   1.0622   4879.49    -0.06      89.01     0.06
 26   1.1249   3196.17    -0.11     138.92    -0.08
 27   1.1412   2708.94     0.00     144.26     0.00
 28   1.2015    907.60     0.03     134.50    -0.02
 29   1.2039    838.98     0.04     133.33     0.06
 30   1.2040    836.40     0.05     133.35     0.15
 31   1.2176    453.00    -0.13     124.51     0.07
 32   1.2750   -947.77     0.01      65.34    -0.01
 33   1.2750   -948.55    -0.08      65.19    -0.12
 34   1.2778  -1004.39     0.30      61.46    -0.19
 35   1.2944  -1317.26    -0.08      38.33     0.02
 36   1.3573  -2044.73     0.05     -66.47     0.07
 37   1.3846  -2111.59    -0.02    -117.18     0.10
 38   2.0289  11712.82     0.02      45.37    -0.08
 39   2.1133   9706.01     0.03     134.26     0.06
 40   2.3483   4055.54    -0.11     -50.60     0.01

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.

15GV54    quality flag:3

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

axisobj        39.347    39.369    39.325
ecceobj         0.234     0.235     0.233
incobj          3.101     3.101     3.101
qmin           29.539    29.553    29.566
qmax           50.095    50.179    50.116
amean          39.456    39.456    39.456
amin           38.922    38.898    38.918
amax           40.077    40.094    40.062
emean           0.236     0.236     0.234
emin            0.220     0.221     0.219
emax            0.252     0.252     0.251
imean           1.592     1.717     1.585
imin            1.059     1.136     0.831
imax            2.264     2.235     2.270
excite_mean     0.237     0.238     0.236
fracstop        1.000     1.000     1.000
cjmean          2.987     2.986     2.988

libcent 0       180.3     180.0     180.4
libamp  0       119.7     123.5     121.2
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       214.3     181.3     195.3
kozaiamp        179.7     180.0     179.5