Orbit Fit and Astrometric record for 15VN167

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: 15VN167   
# Created Mon Dec  6 02:13:38 2021
# Orbit generated from Bernstein formalism
# Fitting     37 observations of     37
# Arc:   2.35y
# First observation: 2015/08/11
#  Last observation: 2017/12/16
Preliminary a, adot, b, bdot, g, gdot:
  -0.000113   0.033470  -0.000009  -0.001697   0.029960   0.000000
# Chi-squared of fit:     3.79 DOF:     68 RMS:  0.06
# Min/Max residuals:    -0.16    0.12
# Exact a, adot, b, bdot, g, gdot:
  1.787268E-05  3.267360E-02 -7.716494E-07 -1.661939E-03  2.937794E-02  1.169992E-04
# Covariance matrix:
  1.9531E-13 -9.7454E-16  7.2386E-15 -7.4373E-15  1.3594E-13  1.6780E-12
 -9.7454E-16  3.0481E-13  1.3373E-14 -2.5944E-14  1.9764E-13  5.8590E-12
  7.2386E-15  1.3373E-14  1.0367E-13 -8.1607E-14  1.4866E-14  3.6106E-13
 -7.4373E-15 -2.5944E-14 -8.1607E-14  1.0218E-13 -2.2461E-14 -7.6089E-13
  1.3594E-13  1.9764E-13  1.4866E-14 -2.2461E-14  2.4767E-13  5.0710E-12
  1.6780E-12  5.8590E-12  3.6106E-13 -7.6089E-13  5.0710E-12  1.7185E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -3.123962   50.388269    1.015361    0.001911    0.032764  2457246.085349
# Heliocentric elements and errors
Epoch:              2457240.5000  =  2015/08/06
Mean Anomaly:          338.81759 +/-     0.265
Argument of Peri:      250.52351 +/-     0.311
Long of Asc Node:      182.67565 +/-     0.005
Inclination:             4.34104 +/-     0.000
Eccentricity:         0.07263374 +/-    0.0002
Semi-Major Axis:     36.46076571 +/-    0.0020
Time of Perihelion: 2461972.1208 +/-      59.2
Perihelion:          33.81248382 +/-    0.0064
Aphelion:            39.10904760 +/-    0.0065
Period (y)              220.1643 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           22.42778457 +/-    0.0004
Ecliptic Y           25.51146415 +/-    0.0004
Ecliptic Z           -1.85500535 +/-    0.0000
Ecliptic XDOT        -0.00234630 +/-    0.0000
Ecliptic YDOT         0.00193696 +/-    0.0000
Ecliptic ZDOT        -0.00015519 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   34.01883844 +/-    0.0004
Geocenter to KBO     34.03914133 +/-    0.0006
# Hcoef:  8.26

The following table shows the complete astrometric record for 15VN167. 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 (15VN167) followed by the observatory code and reference code for the source of the astrometry.

2015 08  11.58456  03 15 14.042  +14 49 55.22  24.0w 15VN167   568  C~2lVj      
2015 09  06.63168  03 15 14.402  +14 47 01.72        15VN167   568  C~2lVj      
2015 09  12.52133  03 15 03.831  +14 45 42.45  23.8w 15VN167   568  C~2lVj      
2015 10  07.45992  03 13 40.228  +14 37 53.77  23.7w 15VN167   568  C~2lVj      
2015 10  08.46335  03 13 35.711  +14 37 31.25  23.7w 15VN167   568  C~2lVj      
2015 10  08.52236  03 13 35.435  +14 37 29.97  23.9w 15VN167   568  C~2lVj      
2015 11  07.36952  03 10 55.294  +14 25 16.34  23.6r 15VN167   568  C~2lVj      
2015 11  07.41164  03 10 55.043  +14 25 15.25  23.5r 15VN167   568  C~2lVj      
2015 11  07.45387  03 10 54.791  +14 25 14.20  23.4r 15VN167   568  C~2lVj      
2015 11  10.54061  03 10 36.551  +14 23 56.43  23.6w 15VN167   568  C~2lVj      
2015 11  17.38710  03 09 56.065  +14 21 07.18  23.6w 15VN167   568  C~2lVj      
2015 11  17.43381  03 09 55.788  +14 21 06.03  23.7w 15VN167   568  C~2lVj      
2015 12  06.39596  03 08 08.688  +14 14 02.21  23.8w 15VN167   568  C~2lVj      
2015 12  13.33048  03 07 33.553  +14 11 52.24  23.7w 15VN167   568  C~2lVj      
2015 12  13.38903  03 07 33.268  +14 11 51.18  23.8w 15VN167   568  C~2lVj      
2016 01  01.38342  03 06 15.807  +14 07 32.59  23.9w 15VN167   568  C~2lVj      
2016 01  02.34977  03 06 12.749  +14 07 23.66  23.9w 15VN167   568  C~2lVj      
2016 01  07.33018  03 05 58.477  +14 06 45.23  23.8w 15VN167   568  C~2lVj      
2016 02  05.27611  03 05 31.231  +14 07 11.64  23.8w 15VN167   568  C~2lVj      
2016 09  07.56785  03 22 53.003  +15 10 26.63        15VN167   568  C~2lVj      
2016 09  25.60501  03 22 09.149  +15 05 49.17  23.9w 15VN167   568  C~2lVj      
2016 10  10.53987  03 21 09.088  +15 00 44.24  24.0w 15VN167   568  C~2lVj      
2016 10  10.58850  03 21 08.860  +15 00 43.19  23.8w 15VN167   568  C~2lVj      
2016 11  02.50837  03 19 07.195  +14 51 39.24        15VN167   568  C~2lVj      
2016 11  02.54312  03 19 06.991  +14 51 38.37  23.8w 15VN167   568  C~2lVj      
2016 11  04.41826  03 18 56.072  +14 50 52.35  23.7w 15VN167   568  C~2lVj      
2016 11  04.48449  03 18 55.673  +14 50 50.73  23.7w 15VN167   568  C~2lVj      
2016 12  24.31885  03 14 24.708  +14 33 54.03  23.4w 15VN167   568  C~2lVj      
2016 12  24.32174  03 14 24.692  +14 33 53.96  24.0w 15VN167   568  C~2lVj      
2016 12  29.38526  03 14 05.066  +14 32 54.41  24.0w 15VN167   568  C~2lVj      
2017 01  02.39267  03 13 51.231  +14 32 15.39  23.9w 15VN167   568  C~2lVj      
2017 01  02.42106  03 13 51.143  +14 32 15.20  23.8w 15VN167   568  C~2lVj      
2017 01  02.42405  03 13 51.134  +14 32 15.04  23.9w 15VN167   568  C~2lVj      
2017 01  26.30729  03 13 04.746  +14 31 03.29  23.8w 15VN167   568  C~2lVj      
2017 01  26.33541  03 13 04.725  +14 31 03.46  23.8w 15VN167   568  C~2lVj      
2017 09  21.61548  03 30 08.024  +15 30 03.64  23.7w 15VN167   568  C~2lVj      
2017 12  16.34460  03 22 47.885  +14 59 57.72  24.0w 15VN167   568  C~2lVj      

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    -0.03
     2   0.0713    -40.48    -0.16    -168.79     0.03
     3   0.0874   -209.23    -0.01    -205.04    -0.03
     4   0.1557  -1502.88     0.09    -337.82    -0.08
     5   0.1585  -1572.06    -0.00    -342.23    -0.05
     6   0.1586  -1576.26    -0.02    -342.41     0.00
     7   0.2403  -4013.43     0.09    -432.29     0.09
     8   0.2405  -4017.23     0.10    -432.37     0.05
     9   0.2406  -4021.04     0.12    -432.40     0.06
    10   0.2490  -4297.29     0.01    -436.57     0.02
    11   0.2678  -4909.71    -0.03    -442.23    -0.00
    12   0.2679  -4913.90     0.01    -442.26    -0.03
    13   0.3198  -6528.55     0.04    -431.87    -0.03
    14   0.3388  -7056.13    -0.07    -419.01     0.02
    15   0.3390  -7060.41    -0.01    -418.91    -0.03
    16   0.3910  -8216.51    -0.09    -362.37     0.05
    17   0.3936  -8261.82    -0.04    -358.87    -0.04
    18   0.4072  -8472.40     0.05    -339.38     0.01
    19   0.4865  -8847.24    -0.04    -205.92     0.02
    20   1.0759   6744.59     0.01    -527.51     0.04
    21   1.1253   6059.25    -0.04    -634.31     0.08
    22   1.1662   5139.55    -0.02    -706.93     0.01
    23   1.1663   5136.08     0.02    -707.10     0.04
    24   1.2291   3291.41     0.02    -779.46     0.03
    25   1.2292   3288.32     0.03    -779.53     0.02
    26   1.2343   3123.46     0.06    -783.10     0.01
    27   1.2345   3117.45     0.01    -783.17     0.04
    28   1.3709   -943.24    -0.03    -739.30    -0.03
    29   1.3709   -943.48    -0.09    -739.31    -0.04
    30   1.3848  -1234.06     0.11    -721.70    -0.10
    31   1.3958  -1438.12    -0.12    -706.37    -0.04
    32   1.3959  -1439.40    -0.01    -706.22     0.01
    33   1.3959  -1439.57    -0.03    -706.34    -0.13
    34   1.4613  -2108.22     0.08    -597.56    -0.07
    35   1.4613  -2108.46     0.06    -597.31     0.03
    36   2.1137  13147.35     0.01    -962.01     0.08
    37   2.3484   6512.90    -0.04   -1117.24    -0.00

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.

15VN167    quality flag:3

Type:           4:3E      4:3E      4:3E

axisobj        36.791    36.797    36.785
ecceobj         0.078     0.078     0.078
incobj          4.324     4.324     4.323
qmin           33.391    33.372    33.394
qmax           39.993    39.985    39.947
amean          36.485    36.485    36.485
amin           36.176    36.175    36.184
amax           36.817    36.817    36.804
emean           0.064     0.064     0.064
emin            0.044     0.044     0.045
emax            0.086     0.086     0.085
imean           2.596     2.601     2.617
imin            0.388     0.488     0.321
imax            4.268     4.266     4.268
excite_mean     0.081     0.080     0.081
fracstop        1.000     1.000     1.000
cjmean          3.020     3.020     3.020

libcent 0       180.1     178.1     180.3
libamp  0        49.4      51.4      45.3
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       180.2     180.5     180.5
kozaiamp        180.0     180.0     180.0