Orbit Fit and Astrometric record for 15VA164

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: 15VA164   
# Created Tue Dec  7 02:13:41 2021
# Orbit generated from Bernstein formalism
# Fitting     29 observations of     29
# Arc:   2.32y
# First observation: 2015/08/20
#  Last observation: 2017/12/13
Preliminary a, adot, b, bdot, g, gdot:
  -0.000076   0.017767  -0.000004  -0.008188   0.021531   0.000000
# Chi-squared of fit:     3.61 DOF:     52 RMS:  0.06
# Min/Max residuals:    -0.21    0.17
# Exact a, adot, b, bdot, g, gdot:
  1.302359E-05  1.756887E-02 -6.106124E-06 -8.091600E-03  2.138125E-02  1.710090E-03
# Covariance matrix:
  2.0483E-13 -3.4749E-14  9.9179E-15 -3.5203E-14  1.3323E-13  2.0551E-12
 -3.4749E-14  2.6265E-13  3.9678E-14 -1.4117E-13  1.7764E-13  8.1276E-12
  9.9179E-15  3.9678E-14  1.3341E-13 -1.1962E-13  4.0063E-14  1.9728E-12
 -3.5203E-14 -1.4117E-13 -1.1962E-13  2.1990E-13 -1.4244E-13 -7.0197E-12
  1.3323E-13  1.7764E-13  4.0063E-14 -1.4244E-13  2.8604E-13  8.2347E-12
  2.0551E-12  8.1276E-12  1.9728E-12 -7.0197E-12  8.2347E-12  4.0395E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.107764   54.766655    1.013743    0.000209   -0.041783  2457255.041279
# Heliocentric elements and errors
Epoch:              2457250.5000  =  2015/08/16
Mean Anomaly:          105.93845 +/-     0.373
Argument of Peri:       66.26477 +/-     0.357
Long of Asc Node:      233.76320 +/-     0.000
Inclination:            24.70607 +/-     0.001
Eccentricity:         0.07015176 +/-    0.0009
Semi-Major Axis:     45.73669097 +/-    0.0073
Time of Perihelion: 2424003.9448 +/-     116.6
Perihelion:          42.52818176 +/-    0.0422
Aphelion:            48.94520017 +/-    0.0424
Period (y)              309.3181 +/-      0.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           27.83000244 +/-    0.0007
Ecliptic Y           37.65118691 +/-    0.0009
Ecliptic Z            0.08770590 +/-    0.0000
Ecliptic XDOT        -0.00171210 +/-    0.0000
Ecliptic YDOT         0.00147194 +/-    0.0000
Ecliptic ZDOT        -0.00103565 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   46.82017305 +/-    0.0009
Geocenter to KBO     46.76994761 +/-    0.0012
# Hcoef:  7.12

The following table shows the complete astrometric record for 15VA164. 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 (15VA164) followed by the observatory code and reference code for the source of the astrometry.

2015 08  20.54049  03 29 31.825  +19 03 52.37  24.1w 15VA164   568  C~2fCN      
2015 09  07.59637  03 29 26.652  +19 02 11.09  24.1w 15VA164   568  C~2fCN      
2015 09  12.44325  03 29 20.533  +19 01 26.83  24.3w 15VA164   568  C~2fCN      
2015 10  07.49180  03 28 20.081  +18 55 53.66  24.1w 15VA164   568  C~2fCN      
2015 10  07.55020  03 28 19.881  +18 55 52.76  24.0w 15VA164   568  C~2fCN      
2015 11  06.30734  03 26 21.294  +18 46 23.52  22.7r 15VA164   568  C~2fCN      
2015 11  06.37060  03 26 20.996  +18 46 22.38  23.9r 15VA164   568  C~2fCN      
2015 11  06.44142  03 26 20.665  +18 46 20.88  24.0r 15VA164   568  C~2fCN      
2015 11  07.46098  03 26 16.092  +18 45 59.33  23.9w 15VA164   568  C~2fCN      
2015 11  17.44217  03 25 30.735  +18 42 26.54  23.7w 15VA164   568  C~2fCN      
2015 12  31.32982  03 22 35.640  +18 28 13.47  24.1w 15VA164   568  C~2fCN      
2016 01  07.35914  03 22 16.857  +18 26 30.74  24.1w 15VA164   568  C~2fCN      
2016 02  05.30505  03 21 41.829  +18 22 06.12  24.2w 15VA164   568  C~2fCN      
2016 02  11.25843  03 21 43.793  +18 21 46.19  24.1w 15VA164   568  C~2fCN      
2016 09  07.61412  03 34 02.997  +18 49 28.26        15VA164   568  C~2fCN      
2016 09  27.53935  03 33 26.444  +18 45 38.09  24.1w 15VA164   568  C~2fCN      
2016 10  09.53365  03 32 50.450  +18 42 31.12  24.0w 15VA164   568  C~2fCN      
2016 10  09.60571  03 32 50.206  +18 42 29.91  23.9w 15VA164   568  C~2fCN      
2016 10  28.47058  03 31 37.458  +18 36 39.93        15VA164   568  C~2fCN      
2016 10  28.49380  03 31 37.365  +18 36 39.45  23.9w 15VA164   568  C~2fCN      
2016 10  29.53251  03 31 32.927  +18 36 18.70  24.2w 15VA164   568  C~2fCN      
2016 11  02.58549  03 31 15.329  +18 34 56.60  24.0w 15VA164   568  C~2fCN      
2016 12  24.34518  03 27 34.756  +18 17 50.78  23.9w 15VA164   568  C~2fCN      
2016 12  24.36175  03 27 34.697  +18 17 50.54  24.1w 15VA164   568  C~2fCN      
2017 01  27.31949  03 26 20.968  +18 11 03.30  24.3w 15VA164   568  C~2fCN      
2017 09  15.55809  03 38 28.698  +18 35 11.48  24.1w 15VA164   568  C~2fCN      
2017 09  20.60688  03 38 19.723  +18 34 12.39  24.3w 15VA164   568  C~2fCN      
2017 12  13.37172  03 32 54.980  +18 08 34.27  24.2w 15VA164   568  C~2fCN      
2017 12  13.40930  03 32 54.822  +18 08 33.49  24.2w 15VA164   568  C~2fCN      

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    -0.01       0.00     0.03
     2   0.0494    -95.75     0.05     -80.44     0.05
     3   0.0627   -190.67    -0.21    -102.29     0.06
     4   0.1313  -1103.52     0.02    -216.39    -0.06
     5   0.1314  -1106.49    -0.02    -216.57     0.01
     6   0.2129  -2878.32     0.17    -354.59    -0.16
     7   0.2131  -2882.71     0.06    -354.64     0.04
     8   0.2133  -2887.63    -0.06    -354.94     0.06
     9   0.2161  -2955.91    -0.03    -359.76    -0.03
    10   0.2434  -3633.01     0.03    -406.28    -0.07
    11   0.3636  -6258.25    -0.05    -609.32    -0.01
    12   0.3828  -6543.06    -0.06    -641.28     0.05
    13   0.4621  -7092.94     0.07    -771.25     0.07
    14   0.4784  -7070.92    -0.02    -797.63     0.04
    15   1.0515   3528.42     0.07   -1761.26    -0.01
    16   1.1061   2969.43    -0.07   -1861.83    -0.03
    17   1.1389   2428.22     0.01   -1921.80    -0.02
    18   1.1391   2424.57     0.08   -1922.15    -0.03
    19   1.1908   1336.87    -0.07   -2014.75     0.03
    20   1.1908   1335.47     0.03   -2014.90    -0.01
    21   1.1937   1269.24    -0.00   -2019.90    -0.01
    22   1.2048   1006.63    -0.01   -2039.48    -0.11
    23   1.3465  -2287.55     0.04   -2272.10     0.02
    24   1.3465  -2288.42     0.03   -2272.13     0.06
    25   1.4395  -3407.02     0.00   -2408.27    -0.05
    26   2.0726   7001.80    -0.02   -3477.49     0.05
    27   2.0864   6863.84     0.07   -3505.53     0.08
    28   2.3158   2005.63    -0.02   -3915.86     0.01
    29   2.3159   2003.25    -0.09   -3916.08    -0.07

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.

15VA164    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        46.147    46.172    46.123
ecceobj         0.072     0.075     0.070
incobj         24.606    24.606    24.606
qmin           41.885    41.794    41.965
qmax           49.978    50.145    49.847
amean          45.827    45.852    45.804
amin           45.463    45.491    45.446
amax           46.193    46.235    46.177
emean           0.071     0.073     0.069
emin            0.060     0.062     0.058
emax            0.082     0.085     0.080
imean          25.785    25.787    25.784
imin           25.523    25.524    25.519
imax           26.016    26.016    26.013
excite_mean     0.441     0.441     0.440
fracstop        1.000     1.000     1.000
cjmean          2.872     2.872     2.872

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       172.1     172.3     171.9
kozaiamp        180.0     179.9     179.9