Orbit Fit and Astrometric record for 15GH56

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: 15GH56    
# Created Sat Dec  4 02:13:20 2021
# Orbit generated from Bernstein formalism
# Fitting     36 observations of     36
# Arc:   2.34y
# First observation: 2015/02/17
#  Last observation: 2017/06/22
Preliminary a, adot, b, bdot, g, gdot:
  -0.000139   0.014708   0.000023   0.011243   0.021142   0.000000
# Chi-squared of fit:     8.56 DOF:     66 RMS:  0.09
# Min/Max residuals:    -0.17    0.25
# Exact a, adot, b, bdot, g, gdot:
  1.002342E-05  1.470142E-02  7.856089E-06  1.132302E-02  2.129891E-02  4.702663E-03
# Covariance matrix:
  1.7906E-13 -1.1594E-14 -1.7637E-14  8.5508E-14  1.5727E-13  4.1853E-12
 -1.1594E-14  1.3868E-13 -1.3705E-14  6.6683E-14  1.0195E-13  3.2645E-12
 -1.7637E-14 -1.3705E-14  9.6808E-14 -1.1479E-13 -3.8375E-14 -2.2491E-12
  8.5508E-14  6.6683E-14 -1.1479E-13  3.2694E-13  1.8677E-13  1.1032E-11
  1.5727E-13  1.0195E-13 -3.8375E-14  1.8677E-13  2.8097E-13  9.1433E-12
  4.1853E-12  3.2645E-12 -2.2491E-12  1.1032E-11  9.1433E-12  5.4026E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.571350 -156.730485    0.807695    0.005776   -0.564259  2457070.986558
# Heliocentric elements and errors
Epoch:              2457070.5000  =  2015/02/17
Mean Anomaly:           82.47118 +/-     0.173
Argument of Peri:      251.64900 +/-     0.097
Long of Asc Node:      201.55571 +/-     0.000
Inclination:            37.41762 +/-     0.001
Eccentricity:         0.23549197 +/-    0.0011
Semi-Major Axis:     46.40232441 +/-    0.0252
Time of Perihelion: 2430621.5938 +/-      51.2
Perihelion:          35.47494977 +/-    0.0535
Aphelion:            57.32969904 +/-    0.0588
Period (y)              316.0951 +/-      0.26
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -43.96979546 +/-    0.0011
Ecliptic Y          -18.02805860 +/-    0.0004
Ecliptic Z            0.46854342 +/-    0.0000
Ecliptic XDOT         0.00020095 +/-    0.0000
Ecliptic YDOT        -0.00197470 +/-    0.0000
Ecliptic ZDOT         0.00146156 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   47.52444995 +/-    0.0010
Geocenter to KBO     46.95076453 +/-    0.0012
# Hcoef:  7.43

The following table shows the complete astrometric record for 15GH56. 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 (15GH56) followed by the observatory code and reference code for the source of the astrometry.

2015 02  17.48578  13 26 58.933  -08 30 37.21  24.3r 15GH56    568  C~2nvR      
2015 02  17.52702  13 26 58.833  -08 30 36.43  24.3r 15GH56    568  C~2nvR      
2015 02  20.45766  13 26 52.647  -08 29 37.80  24.3r 15GH56    568  C~2nvR      
2015 03  17.43316  13 25 39.261  -08 19 17.83  24.2r 15GH56    568  C~2nvR      
2015 03  18.45231  13 25 35.619  -08 18 49.03  24.1r 15GH56    568  C~2nvR      
2015 03  18.50553  13 25 35.423  -08 18 47.61  24.2r 15GH56    568  C~2nvR      
2015 03  20.50715  13 25 28.171  -08 17 49.91  24.0r 15GH56    568  C~2nvR      
2015 04  11.39801  13 24 02.383  -08 06 44.70  24.1r 15GH56    568  C~2nvR      
2015 04  12.35069  13 23 58.514  -08 06 14.87  24.1r 15GH56    568  C~2nvR      
2015 04  12.39167  13 23 58.353  -08 06 13.59  24.3r 15GH56    568  C~2nvR      
2015 04  12.43732  13 23 58.164  -08 06 12.10  24.3r 15GH56    568  C~2nvR      
2015 04  14.44843  13 23 49.975  -08 05 09.78  23.9r 15GH56    568  C~2nvR      
2015 04  16.38638  13 23 42.105  -08 04 09.65  24.0r 15GH56    568  C~2nvR      
2015 04  18.40224  13 23 33.943  -08 03 07.24  24.1r 15GH56    568  C~2nvR      
2015 04  18.45015  13 23 33.739  -08 03 05.69  24.3r 15GH56    568  C~2nvR      
2015 05  16.26602  13 21 49.427  -07 49 40.28  24.1r 15GH56    568  C~2nvR      
2015 06  21.32182  13 20 27.384  -07 37 50.72  24.2r 15GH56    568  C~2nvR      
2015 06  22.27832  13 20 26.384  -07 37 39.13  24.4r 15GH56    568  C~2nvR      
2015 07  12.27234  13 20 21.064  -07 35 12.52  24.2r 15GH56    568  C~2nvR      
2015 07  19.26227  13 20 26.425  -07 35 05.30  24.2r 15GH56    568  C~2nvR      
2016 02  04.55519  13 31 25.232  -08 16 51.52  24.4w 15GH56    568  C~2nvR      
2016 02  10.54313  13 31 18.215  -08 15 20.58  24.4w 15GH56    568  C~2nvR      
2016 03  12.48022  13 30 02.820  -08 03 47.80  24.4w 15GH56    568  C~2nvR      
2016 04  03.44126  13 28 41.531  -07 53 04.54  24.4w 15GH56    568  C~2nvR      
2016 04  09.42106  13 28 17.520  -07 50 00.64  24.5w 15GH56    568  C~2nvR      
2016 05  01.35644  13 26 50.120  -07 38 58.47  23.4w 15GH56    568  C~2nvR      
2016 05  02.29905  13 26 46.537  -07 38 31.51  24.9w 15GH56    568  C~2nvR      
2016 05  06.30882  13 26 31.568  -07 36 37.97  24.4w 15GH56    568  C~2nvR      
2016 05  28.27599  13 25 20.693  -07 27 30.69  24.2w 15GH56    568  C~2nvR      
2016 05  28.28814  13 25 20.660  -07 27 30.44  24.1w 15GH56    568  C~2nvR      
2016 06  04.35749  13 25 03.093  -07 25 08.25  24.3w 15GH56    568  C~2nvR      
2016 06  27.28082  13 24 28.799  -07 19 48.61  23.9w 15GH56    568  C~2nvR      
2016 07  06.31671  13 24 25.735  -07 18 46.90  24.8w 15GH56    568  C~2nvR      
2016 07  07.28338  13 24 25.797  -07 18 42.56  24.5w 15GH56    568  C~2nvR      
2017 03  28.56968  13 33 12.958  -07 38 46.87  24.6w 15GH56    568  C~2nvR      
2017 06  22.26639  13 28 38.588  -07 03 49.87  24.6w 15GH56    568  C~2nvR      

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     0.18       0.00     0.11
     2   0.0001     -1.67    -0.01       0.18     0.02
     3   0.0081   -108.61    -0.07      20.75     0.00
     4   0.0765  -1349.68    -0.05     193.92     0.12
     5   0.0793  -1410.56    -0.02     200.66    -0.07
     6   0.0795  -1413.79    -0.00     200.90    -0.17
     7   0.0849  -1535.15     0.06     214.63    -0.04
     8   0.1449  -2964.84     0.05     360.17    -0.05
     9   0.1475  -3029.27    -0.04     366.54     0.13
    10   0.1476  -3031.97     0.08     366.84     0.18
    11   0.1477  -3035.13     0.05     367.18     0.25
    12   0.1532  -3171.22    -0.06     379.90    -0.03
    13   0.1585  -3302.10    -0.09     392.33    -0.08
    14   0.1640  -3437.87     0.01     405.25    -0.05
    15   0.1642  -3441.26    -0.10     405.56    -0.02
    16   0.2403  -5180.11     0.15     576.82    -0.02
    17   0.3390  -6577.35    -0.06     780.72    -0.05
    18   0.3417  -6595.49     0.00     785.92    -0.04
    19   0.3964  -6723.73    -0.04     892.48     0.04
    20   0.4155  -6652.40    -0.05     928.95    -0.14
    21   0.9639   3370.54     0.04    2222.86     0.07
    22   0.9803   3240.24     0.08    2269.24    -0.02
    23   1.0650   1944.27    -0.14    2502.35    -0.11
    24   1.1251    584.57     0.05    2655.92    -0.05
    25   1.1415    185.09    -0.03    2695.35    -0.12
    26   1.2016  -1266.80    -0.15    2831.25     0.03
    27   1.2041  -1326.26    -0.08    2836.62    -0.12
    28   1.2151  -1575.06     0.12    2859.86     0.02
    29   1.2753  -2756.97     0.00    2978.36     0.09
    30   1.2753  -2757.52     0.01    2978.41     0.08
    31   1.2947  -3052.99     0.05    3013.72     0.01
    32   1.3574  -3645.52     0.06    3121.56    -0.08
    33   1.3822  -3710.78    -0.13    3161.99    -0.06
    34   1.3848  -3711.53     0.11    3166.36     0.02
    35   2.1084   4023.22    -0.09    4936.37     0.04
    36   2.3430   -545.26     0.09    5387.57     0.11

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.

15GH56    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        46.053    46.123    45.984
ecceobj         0.236     0.238     0.233
incobj         37.589    37.589    37.589
qmin           34.774    34.157    34.831
qmax           58.177    59.086    58.015
amean          46.265    46.346    46.190
amin           45.875    45.925    45.769
amax           46.714    46.831    46.667
emean           0.228     0.240     0.227
emin            0.211     0.223     0.209
emax            0.246     0.262     0.243
imean          37.782    37.626    37.759
imin           37.442    37.217    37.461
imax           38.188    38.056    38.056
excite_mean     0.654     0.656     0.653
fracstop        1.000     1.000     1.000
cjmean          2.559     2.558     2.559

libcent 0      -180.0    -180.0    -180.0
libamp  0      -180.0    -180.0    -180.0
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       200.8     204.9     206.4
kozaiamp        180.0     180.0     180.0