Orbit Fit and Astrometric record for 15VV170

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: 15VV170   
# Created Tue Apr  1 01:10:41 2025
# Orbit generated from Bernstein formalism
# Fitting     32 observations of     33
# Arc:   2.02y
# First observation: 2015/09/07
#  Last observation: 2017/09/15
Preliminary a, adot, b, bdot, g, gdot:
  -0.000081   0.022618   0.000001   0.000335   0.023515   0.000000
# Chi-squared of fit:     8.04 DOF:     58 RMS:  0.09
# Min/Max residuals:    -0.17    0.29
# Exact a, adot, b, bdot, g, gdot:
  1.499703E-05  2.244927E-02  5.172580E-07  3.337858E-04  2.343043E-02  1.134846E-03
# Covariance matrix:
  2.2732E-13 -4.7326E-14 -6.9416E-16  1.8848E-15  1.6787E-13  3.2957E-12
 -4.7326E-14  3.1563E-13 -1.1689E-15  4.7744E-15  1.5572E-13  8.4382E-12
 -6.9416E-16 -1.1689E-15  1.1375E-13 -1.0306E-13 -1.4815E-15 -6.2481E-14
  1.8848E-15  4.7744E-15 -1.0306E-13  1.5497E-13  4.9026E-15  2.5145E-13
  1.6787E-13  1.5572E-13 -1.4815E-15  4.9026E-15  2.8848E-13  8.6220E-12
  3.2957E-12  8.4382E-12 -6.2481E-14  2.5145E-13  8.6220E-12  4.4427E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.311585   52.049985    0.934035    0.002253   -0.387037  2457273.129809
# Heliocentric elements and errors
Epoch:              2457270.5000  =  2015/09/05
Mean Anomaly:           83.50579 +/-     0.121
Argument of Peri:      293.17516 +/-     0.145
Long of Asc Node:       31.07698 +/-     0.022
Inclination:             0.91437 +/-     0.001
Eccentricity:         0.02667117 +/-    0.0009
Semi-Major Axis:     43.17356083 +/-    0.0039
Time of Perihelion: 2433235.7655 +/-      34.6
Perihelion:          42.02207165 +/-    0.0407
Aphelion:            44.32505001 +/-    0.0407
Period (y)              283.6841 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           27.21688803 +/-    0.0006
Ecliptic Y           33.38491067 +/-    0.0008
Ecliptic Z            0.23212753 +/-    0.0000
Ecliptic XDOT        -0.00198897 +/-    0.0000
Ecliptic YDOT         0.00171118 +/-    0.0000
Ecliptic ZDOT         0.00003978 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.07394964 +/-    0.0007
Geocenter to KBO     42.67954717 +/-    0.0010
# Hcoef:  8.79

The following table shows the complete astrometric record for 15VV170. 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 (15VV170) followed by the observatory code and reference code for the source of the astrometry.

2015 09  07.62902  03 18 11.996  +18 34 52.90  25.1w 15VV170   568  C~2nw7      
2015 09  12.49264  03 18 04.313  +18 34 26.59  25.1w 15VV170   568  C~2nw7      
2015 10  07.53854  03 16 54.367  +18 30 14.00  26.1w 15VV170   568  C~2nw7      
2015 10  07.59790  03 16 54.142  +18 30 13.23  25.9w 15VV170   568  C~2nw7      
2015 10  09.57780  03 16 46.705  +18 29 45.61  25.2w 15VV170   568  C~2nw7      
2015 11  07.33264  03 14 38.667  +18 21 42.80  25.1r 15VV170   568  C~2nw7      
2015 11  07.37479  03 14 38.459  +18 21 42.02  25.1r 15VV170   568  C~2nw7      
2015 11  07.41697  03 14 38.242  +18 21 41.23  24.7r 15VV170   568  C~2nw7      
2015 11  10.49950  03 14 23.168  +18 20 43.70  24.7w 15VV170   568  C~2nw7      
2015 11  17.34635  03 13 49.626  +18 18 34.45  25.0w 15VV170   568  C~2nw7      
2015 11  17.39294  03 13 49.399  +18 18 33.66  25.5w 15VV170   568  C~2nw7      
2015 12  06.35508  03 12 20.006  +18 12 45.53  24.8w 15VV170   568  C~2nw7      
2015 12  06.49265  03 12 19.394  +18 12 43.27  25.7w 15VV170   568  C~2nw7      
2016 01  01.34294  03 10 43.536  +18 06 22.60  24.9w 15VV170   568  C~2nw7      
2016 01  07.40549  03 10 27.837  +18 05 18.99  25.1w 15VV170   568  C~2nw7      
2016 01  08.25043  03 10 25.903  +18 05 11.20  25.5w 15VV170   568  C~2nw7      
2016 02  05.28189  03 09 58.668  +18 03 15.80  25.6w 15VV170   568  C~2nw7      
2016 02  10.30227  03 10 01.749  +18 03 26.74  25.1w 15VV170   568  C~2nw7      
2016 09  07.57363  03 23 24.388  +18 55 32.47  25.4w 15VV170   568  C~2nw7      
2016 09  27.51061  03 22 41.088  +18 53 05.02  25.8w 15VV170   568  C~2nw7      
2016 09  29.48481  03 22 35.080  +18 52 43.78  25.1w 15VV170   568  C~2nw7      
2016 10  05.48792  03 22 15.061  +18 51 33.15  24.8w 15VV170   568  C~2nw7      
2016 10  07.49247  03 22 07.813  +18 51 07.34  25.7w 15VV170   568  C~2nw7      
2016 10  07.58817  03 22 07.456  +18 51 06.08  25.5w 15VV170   568  C~2nw7      
2016 10  09.49252  03 22 00.357  +18 50 40.58  25.9w 15VV170   568  C~2nw7      
2016 10  09.56525  03 22 00.072  +18 50 39.50  25.4w 15VV170   568  C~2nw7      
2016 11  02.53154  03 20 15.270  +18 44 18.04  25.6w 15VV170   568  C~2nw7      
2016 11  04.40663  03 20 06.238  +18 43 44.68  25.4w 15VV170   568  C~2nw7      
2016 12  24.30698  03 16 20.557  +18 29 30.84  25.5w 15VV170   568  C~2nw7      
2016 12  24.32550  03 16 20.489  +18 29 30.44  26.0w 15VV170   568  C~2nw7      
2017 01  02.40920  03 15 51.884  +18 27 39.00  25.2w 15VV170   568  C~2nw7      
2017 01  02.42780  03 15 51.849  +18 27 38.83  25.1w 15VV170   568  C~2nw7      
2017 09  15.56413  03 28 26.186  +19 15 01.39  25.3w 15VV170   568  C~2nw7      

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    -0.06
     2   0.0133   -112.33    -0.17       2.78    -0.14
     3   0.0819  -1138.56     0.04      16.48     0.02
     4   0.0821  -1141.85     0.04      16.57     0.07
     5   0.0875  -1251.19    -0.08      17.39    -0.04
     6   0.1662  -3136.35     0.07      27.67    -0.08
     7   0.1663  -3139.41     0.08      27.69    -0.08
     8   0.1664  -3142.60    -0.04      27.74    -0.06
     9   0.1749  -3364.84    -0.15      28.68     0.11
    10   0.1936  -3859.78    -0.02      29.87    -0.00
    11   0.1937  -3863.10     0.07      29.96     0.06
    12   0.2457  -5183.84    -0.06      31.57    -0.00
    13   0.2460  -5192.85     0.09      31.71     0.11
    14   0.3168  -6612.31     0.01      29.55     0.08
    15   0.3334  -6845.25    -0.03      28.30    -0.10
    16   0.3357  -6873.94    -0.04      28.19    -0.02
    17   0.4125  -7279.52 (   0.53)     21.37 (   0.06)
    18   0.4262  -7234.20     0.10      20.09     0.18
    19   1.0019   4607.23    -0.08      69.25    -0.11
    20   1.0565   3975.16    -0.13      81.08    -0.03
    21   1.0619   3887.26     0.05      82.02    -0.16
    22   1.0783   3594.38     0.29      85.39     0.08
    23   1.0838   3488.28     0.01      86.41     0.11
    24   1.0841   3483.06     0.05      86.47     0.10
    25   1.0893   3379.08     0.09      87.28     0.02
    26   1.0895   3374.90     0.03      87.26    -0.05
    27   1.1551   1838.32     0.03      96.51    -0.01
    28   1.1602   1705.75    -0.10      97.02     0.01
    29   1.2969  -1614.20    -0.05      99.95     0.06
    30   1.2969  -1615.24    -0.11      99.81    -0.08
    31   1.3218  -2037.21    -0.12      98.40     0.05
    32   1.3218  -2037.73     0.14      98.37     0.02
    33   2.0231   9046.52    -0.05     142.85    -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.

15VV170    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.595    43.610    43.580
ecceobj         0.033     0.035     0.032
incobj          0.911     0.910     0.911
qmin           41.122    41.041    41.183
qmax           45.579    45.685    45.488
amean          43.269    43.283    43.254
amin           42.943    42.946    42.918
amax           43.610    43.629    43.587
emean           0.029     0.031     0.028
emin            0.009     0.011     0.008
emax            0.046     0.047     0.044
imean           1.575     1.574     1.576
imin            0.604     0.606     0.600
imax            2.289     2.290     2.290
excite_mean     0.040     0.042     0.039
fracstop        1.000     1.000     1.000
cjmean          3.091     3.091     3.091

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       196.1     197.4     195.2
kozaiamp        180.0     180.0     180.0