Orbit Fit and Astrometric record for 15VY169

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: 15VY169   
# Created Wed Dec  8 02:13:43 2021
# Orbit generated from Bernstein formalism
# Fitting     29 observations of     29
# Arc:   1.35y
# First observation: 2015/08/20
#  Last observation: 2016/12/24
Preliminary a, adot, b, bdot, g, gdot:
  -0.000097   0.027025   0.000002  -0.005349   0.025569   0.000000
# Chi-squared of fit:     8.85 DOF:     52 RMS:  0.10
# Min/Max residuals:    -0.30    0.27
# Exact a, adot, b, bdot, g, gdot:
  1.691189E-05  2.651122E-02 -3.525385E-06 -5.240384E-03  2.523337E-02 -3.891071E-05
# Covariance matrix:
  2.4722E-13  1.2690E-13  1.7273E-14 -9.4271E-14  2.9350E-13  1.2734E-11
  1.2690E-13  1.1537E-12  6.8570E-14 -3.8780E-13  7.9873E-13  5.2072E-11
  1.7273E-14  6.8570E-14  1.1320E-13 -1.4720E-13  5.8551E-14  3.9067E-12
 -9.4271E-14 -3.8780E-13 -1.4720E-13  4.0094E-13 -3.2742E-13 -2.2149E-11
  2.9350E-13  7.9873E-13  5.8551E-14 -3.2742E-13  7.8249E-13  4.4047E-11
  1.2734E-11  5.2072E-11  3.9067E-12 -2.2149E-11  4.4047E-11  2.9728E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.507891   54.611216    1.013621   -0.000265   -0.044603  2457255.045359
# Heliocentric elements and errors
Epoch:              2457250.5000  =  2015/08/16
Mean Anomaly:          351.03751 +/-     0.613
Argument of Peri:      194.93869 +/-     0.851
Long of Asc Node:      230.59325 +/-     0.000
Inclination:            11.21798 +/-     0.001
Eccentricity:         0.15405934 +/-    0.0004
Semi-Major Axis:     46.76788587 +/-    0.0053
Time of Perihelion: 2460158.8473 +/-     199.0
Perihelion:          39.56285626 +/-    0.0197
Aphelion:            53.97291549 +/-    0.0201
Period (y)              319.8378 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           23.79781071 +/-    0.0008
Ecliptic Y           31.75600749 +/-    0.0011
Ecliptic Z           -0.35140597 +/-    0.0000
Ecliptic XDOT        -0.00235240 +/-    0.0000
Ecliptic YDOT         0.00165192 +/-    0.0000
Ecliptic ZDOT        -0.00056847 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.68505125 +/-    0.0010
Geocenter to KBO     39.63005763 +/-    0.0014
# Hcoef:  8.27

The following table shows the complete astrometric record for 15VY169. 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 (15VY169) followed by the observatory code and reference code for the source of the astrometry.

2015 08  20.54457  03 29 31.495  +18 25 46.47  24.3w 15VY169   568  C~2nw4      
2015 08  20.55007  03 29 31.504  +18 25 46.48  24.6w 15VY169   568  C~2nw4      
2015 09  07.60044  03 29 28.689  +18 24 26.68  24.4w 15VY169   568  C~2nw4      
2015 09  12.44733  03 29 22.366  +18 23 45.48  24.7w 15VY169   568  C~2nw4      
2015 10  07.49766  03 28 15.689  +18 18 11.93  24.4w 15VY169   568  C~2nw4      
2015 10  07.55607  03 28 15.461  +18 18 10.94  24.4w 15VY169   568  C~2nw4      
2015 10  09.53675  03 28 08.015  +18 17 36.96  24.5w 15VY169   568  C~2nw4      
2015 11  06.31257  03 26 00.924  +18 08 19.78  24.3r 15VY169   568  C~2nw4      
2015 11  06.37589  03 26 00.596  +18 08 18.21  24.6r 15VY169   568  C~2nw4      
2015 11  06.44667  03 26 00.221  +18 08 16.81  24.1r 15VY169   568  C~2nw4      
2015 11  07.46686  03 25 54.980  +18 07 54.50  24.4w 15VY169   568  C~2nw4      
2015 11  17.44798  03 25 03.253  +18 04 13.66  24.2w 15VY169   568  C~2nw4      
2015 11  17.49527  03 25 03.003  +18 04 12.56  24.3w 15VY169   568  C~2nw4      
2015 12  06.31417  03 23 27.787  +17 57 26.55  24.4w 15VY169   568  C~2nw4      
2015 12  06.44064  03 23 27.179  +17 57 24.01  24.2w 15VY169   568  C~2nw4      
2015 12  06.44787  03 23 27.124  +17 57 23.73  24.1w 15VY169   568  C~2nw4      
2015 12  31.33561  03 21 44.930  +17 50 00.02  24.6w 15VY169   568  C~2nw4      
2016 01  07.36493  03 21 24.179  +17 48 26.21  24.6w 15VY169   568  C~2nw4      
2016 01  07.41708  03 21 24.017  +17 48 25.41  24.9w 15VY169   568  C~2nw4      
2016 02  05.31154  03 20 48.657  +17 45 11.33  24.5w 15VY169   568  C~2nw4      
2016 02  11.26421  03 20 52.155  +17 45 12.58  24.6w 15VY169   568  C~2nw4      
2016 09  25.62123  03 35 28.578  +18 25 24.80  24.4w 15VY169   568  C~2nw4      
2016 10  10.56080  03 34 39.384  +18 21 34.57  24.5w 15VY169   568  C~2nw4      
2016 10  10.60927  03 34 39.201  +18 21 33.70  24.5w 15VY169   568  C~2nw4      
2016 10  28.49380  03 33 20.682  +18 15 53.61  24.4w 15VY169   568  C~2nw4      
2016 10  29.53251  03 33 15.632  +18 15 32.21  24.6w 15VY169   568  C~2nw4      
2016 11  02.58549  03 32 55.579  +18 14 07.97  24.2w 15VY169   568  C~2nw4      
2016 12  24.34518  03 28 43.322  +17 56 49.44  24.6w 15VY169   568  C~2nw4      
2016 12  24.36175  03 28 43.252  +17 56 49.22  24.6w 15VY169   568  C~2nw4      

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    -0.06       0.00     0.05
     2   0.0000      0.13     0.01      -0.02     0.05
     3   0.0494    -58.12     0.04     -67.70     0.05
     4   0.0627   -155.42    -0.30     -85.81     0.15
     5   0.1313  -1157.41     0.11    -177.89     0.01
     6   0.1314  -1160.80     0.01    -178.06     0.04
     7   0.1369  -1271.93    -0.04    -185.07     0.10
     8   0.2129  -3164.42     0.27    -279.54    -0.05
     9   0.2131  -3169.34     0.22    -279.91    -0.25
    10   0.2133  -3174.86     0.16    -279.94    -0.08
    11   0.2161  -3252.79    -0.11    -283.06     0.04
    12   0.2434  -4022.27    -0.06    -313.98     0.06
    13   0.2435  -4026.00    -0.07    -314.16     0.02
    14   0.2951  -5443.35    -0.02    -368.08    -0.06
    15   0.2954  -5452.39     0.15    -368.37    -0.04
    16   0.2954  -5453.22    -0.16    -368.44    -0.09
    17   0.3636  -6978.10    -0.04    -430.39    -0.04
    18   0.3828  -7288.90     0.13    -446.11     0.05
    19   0.3830  -7291.34    -0.19    -446.30    -0.03
    20   0.4621  -7829.86    -0.03    -505.86    -0.06
    21   0.4784  -7781.14    -0.03    -517.36     0.02
    22   1.1008   4930.38    -0.00   -1234.94    -0.03
    23   1.1417   4195.27    -0.02   -1293.83     0.05
    24   1.1419   4192.53     0.09   -1294.07    -0.00
    25   1.1908   3025.28    -0.03   -1359.61     0.03
    26   1.1937   2950.30    -0.07   -1363.28    -0.05
    27   1.2048   2652.73    -0.03   -1377.08    -0.03
    28   1.3465  -1088.58     0.05   -1517.80     0.02
    29   1.3465  -1089.61    -0.00   -1517.77     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.

15VY169    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        47.264    47.286    47.245
ecceobj         0.161     0.161     0.162
incobj         11.176    11.175    11.176
qmin           38.613    38.688    38.664
qmax           55.429    55.420    55.412
amean          46.844    46.865    46.826
amin           46.444    46.463    46.410
amax           47.294    47.318    47.291
emean           0.159     0.159     0.159
emin            0.146     0.146     0.146
emax            0.172     0.172     0.173
imean          12.291    12.289    12.292
imin           11.853    11.854    11.854
imax           12.755    12.749    12.764
excite_mean     0.265     0.265     0.266
fracstop        1.000     1.000     1.000
cjmean          3.049     3.049     3.049

libcent 0       182.3    -180.0    -180.0
libamp  0       143.2    -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       181.7     181.7     181.7
kozaiamp        180.0     180.0     180.0