Orbit Fit and Astrometric record for 15VN171

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: 15VN171   
# Created Fri Mar 29 01:18:32 2024
# Orbit generated from Bernstein formalism
# Fitting     38 observations of     38
# Arc:   2.35y
# First observation: 2015/08/11
#  Last observation: 2017/12/16
Preliminary a, adot, b, bdot, g, gdot:
  -0.000090   0.020777  -0.000003   0.000774   0.022452   0.000000
# Chi-squared of fit:     7.07 DOF:     70 RMS:  0.08
# Min/Max residuals:    -0.24    0.28
# Exact a, adot, b, bdot, g, gdot:
  1.537714E-05  2.042747E-02  7.139753E-07  7.613404E-04  2.217387E-02  4.015963E-04
# Covariance matrix:
  1.9091E-13 -1.2198E-14  2.0125E-15  2.2615E-15  1.3648E-13  2.0144E-12
 -1.2198E-14  2.4985E-13  3.8329E-16  7.5792E-15  1.5725E-13  6.4401E-12
  2.0125E-15  3.8329E-16  8.9528E-14 -6.3142E-14  2.3309E-15  1.6890E-14
  2.2615E-15  7.5792E-15 -6.3142E-14  7.6904E-14  6.9121E-15  2.8173E-13
  1.3648E-13  1.5725E-13  2.3309E-15  6.9121E-15  2.3690E-13  5.9701E-12
  2.0144E-12  6.4401E-12  1.6890E-14  2.8173E-13  5.9701E-12  2.3952E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.584492   51.066204    1.014905    0.001359    0.044671  2457246.093519
# Heliocentric elements and errors
Epoch:              2457240.5000  =  2015/08/06
Mean Anomaly:          189.75216 +/-     1.294
Argument of Peri:      133.72950 +/-     1.294
Long of Asc Node:       86.84593 +/-     0.010
Inclination:             2.62958 +/-     0.001
Eccentricity:         0.03188063 +/-    0.0001
Semi-Major Axis:     43.68842039 +/-    0.0025
Time of Perihelion: 2507120.5709 +/-     379.1
Perihelion:          42.29560616 +/-    0.0068
Aphelion:            45.08123461 +/-    0.0069
Period (y)              288.7738 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           29.08714611 +/-    0.0006
Ecliptic Y           34.39461387 +/-    0.0008
Ecliptic Z           -1.24694889 +/-    0.0000
Ecliptic XDOT        -0.00193124 +/-    0.0000
Ecliptic YDOT         0.00161925 +/-    0.0000
Ecliptic ZDOT         0.00009265 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   45.06225043 +/-    0.0007
Geocenter to KBO     45.09813608 +/-    0.0010
# Hcoef:  7.80

The following table shows the complete astrometric record for 15VN171. 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 (15VN171) followed by the observatory code and reference code for the source of the astrometry.

2015 08  11.59273  03 16 16.652  +16 29 42.13  24.7w 15VN171   568  C~2nw9      
2015 09  06.62350  03 16 12.806  +16 28 41.66  24.4w 15VN171   568  C~2nw9      
2015 09  12.51312  03 16 03.794  +16 27 57.50  24.6w 15VN171   568  C~2nw9      
2015 10  07.43992  03 14 56.407  +16 23 03.02  24.5w 15VN171   568  C~2nw9      
2015 10  07.44703  03 14 56.377  +16 23 02.84  24.8w 15VN171   568  C~2nw9      
2015 10  08.45165  03 14 52.783  +16 22 48.05  24.4w 15VN171   568  C~2nw9      
2015 10  08.51072  03 14 52.569  +16 22 47.14  24.2w 15VN171   568  C~2nw9      
2015 11  07.34317  03 12 46.329  +16 14 19.73  24.2r 15VN171   568  C~2nw9      
2015 11  07.38533  03 12 46.134  +16 14 18.95  24.2r 15VN171   568  C~2nw9      
2015 11  07.42748  03 12 45.942  +16 14 18.10  24.5r 15VN171   568  C~2nw9      
2015 11  10.51130  03 12 31.597  +16 13 22.20  24.4w 15VN171   568  C~2nw9      
2015 11  17.37547  03 11 59.612  +16 11 18.70  24.5w 15VN171   568  C~2nw9      
2015 11  17.42215  03 11 59.393  +16 11 17.81  24.5w 15VN171   568  C~2nw9      
2015 12  06.36680  03 10 34.644  +16 05 59.13  24.5w 15VN171   568  C~2nw9      
2015 12  06.51621  03 10 33.992  +16 05 56.83  24.5w 15VN171   568  C~2nw9      
2015 12  13.30120  03 10 06.556  +16 04 17.20  24.6w 15VN171   568  C~2nw9      
2015 12  13.35972  03 10 06.323  +16 04 16.40  24.4w 15VN171   568  C~2nw9      
2016 01  01.35451  03 09 03.281  +16 00 40.04  24.4w 15VN171   568  C~2nw9      
2016 01  07.30127  03 08 48.700  +15 59 54.85  24.5w 15VN171   568  C~2nw9      
2016 02  04.33458  03 08 20.564  +15 59 13.45  24.6w 15VN171   568  C~2nw9      
2016 02  11.22361  03 08 24.611  +15 59 48.50  24.6w 15VN171   568  C~2nw9      
2016 09  06.60560  03 20 54.578  +16 49 25.79  24.6w 15VN171   568  C~2nw9      
2016 09  26.59656  03 20 13.378  +16 46 21.59  24.6w 15VN171   568  C~2nw9      
2016 10  10.40230  03 19 28.093  +16 43 15.48  24.6w 15VN171   568  C~2nw9      
2016 10  10.46065  03 19 27.867  +16 43 14.58  24.4w 15VN171   568  C~2nw9      
2016 10  27.49679  03 18 18.049  +16 38 39.00  24.6w 15VN171   568  C~2nw9      
2016 11  02.60285  03 17 50.521  +16 36 52.82  24.6w 15VN171   568  C~2nw9      
2016 11  03.52184  03 17 46.306  +16 36 36.58  24.6w 15VN171   568  C~2nw9      
2016 12  24.29598  03 14 08.179  +16 23 23.00  24.6w 15VN171   568  C~2nw9      
2016 12  24.30148  03 14 08.164  +16 23 22.97  24.8w 15VN171   568  C~2nw9      
2017 01  02.39822  03 13 41.109  +16 21 55.71  24.5w 15VN171   568  C~2nw9      
2017 01  02.40371  03 13 41.088  +16 21 55.52  24.6w 15VN171   568  C~2nw9      
2017 01  26.29235  03 13 01.547  +16 20 17.96  24.6w 15VN171   568  C~2nw9      
2017 09  16.60944  03 25 22.740  +17 08 38.51  24.6w 15VN171   568  C~2nw9      
2017 09  17.60038  03 25 20.753  +17 08 29.95  24.7w 15VN171   568  C~2nw9      
2017 09  23.54857  03 25 07.190  +17 07 32.12        15VN171   568  C~2nw9      
2017 09  24.59522  03 25 04.513  +17 07 20.94  24.9w 15VN171   568  C~2nw9      
2017 12  16.39181  03 19 22.008  +16 46 08.87  24.5w 15VN171   568  C~2nw9      

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    -0.17       0.00    -0.04
     2   0.0713    -69.17     0.28     -43.95    -0.24
     3   0.0874   -205.83    -0.05     -52.77     0.03
     4   0.1556  -1218.68     0.09     -83.33    -0.03
     5   0.1557  -1219.14     0.01     -83.39    -0.09
     6   0.1584  -1272.93    -0.06     -84.10     0.09
     7   0.1586  -1276.14    -0.03     -84.17     0.05
     8   0.2402  -3163.25    -0.04     -94.53     0.15
     9   0.2404  -3166.17     0.00     -94.54     0.12
    10   0.2405  -3169.06     0.07     -94.63     0.00
    11   0.2489  -3383.14    -0.01     -93.78    -0.01
    12   0.2677  -3860.25    -0.02     -90.55     0.03
    13   0.2678  -3863.53    -0.01     -90.57    -0.04
    14   0.3197  -5126.00     0.01     -72.16    -0.10
    15   0.3201  -5135.68    -0.19     -71.86    -0.02
    16   0.3387  -5543.62    -0.03     -61.99    -0.04
    17   0.3389  -5547.07    -0.04     -61.86    -0.02
    18   0.3909  -6481.39     0.02     -26.16     0.07
    19   0.4071  -6696.25     0.05     -13.04     0.03
    20   0.4839  -7098.54     0.04      56.57    -0.02
    21   0.5028  -7032.81     0.12      74.58     0.04
    22   1.0733   4164.62     0.07     113.55     0.05
    23   1.1280   3545.35    -0.05      86.63     0.01
    24   1.1658   2868.74     0.00      73.52     0.03
    25   1.1660   2865.37    -0.09      73.48     0.02
    26   1.2126   1824.91     0.04      65.59     0.01
    27   1.2293   1415.24     0.09      65.31     0.03
    28   1.2318   1352.51    -0.02      65.31    -0.04
    29   1.3709  -1883.11     0.01     118.33    -0.00
    30   1.3709  -1883.32     0.07     118.35     0.01
    31   1.3958  -2281.96    -0.02     136.79     0.02
    32   1.3958  -2282.30    -0.14     136.68    -0.09
    33   1.4612  -2857.07    -0.05     192.95     0.03
    34   2.1000   8181.72    -0.08     258.28     0.01
    35   2.1027   8151.95    -0.02     257.09     0.11
    36   2.1190   7948.95     0.06     249.65    -0.02
    37   2.1218   7908.94     0.00     248.41    -0.07
    38   2.3485   2828.81     0.08     263.56    -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.

15VN171    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        44.089    44.097    44.081
ecceobj         0.023     0.022     0.023
incobj          2.628     2.628     2.627
qmin           41.854    41.880    41.806
qmax           45.853    45.866    45.898
amean          43.776    43.784    43.768
amin           43.447    43.446    43.432
amax           44.113    44.128    44.108
emean           0.025     0.024     0.025
emin            0.007     0.008     0.007
emax            0.040     0.040     0.041
imean           0.963     0.962     0.962
imin            0.158     0.161     0.153
imax            1.490     1.488     1.492
excite_mean     0.030     0.030     0.030
fracstop        1.000     1.000     1.000
cjmean          3.098     3.098     3.098

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       207.9     207.7     208.8
kozaiamp        180.0     180.0     180.0