Orbit Fit and Astrometric record for 15VO169

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: 15VO169   
# Created Tue Apr  1 01:10:40 2025
# Orbit generated from Bernstein formalism
# Fitting     23 observations of     23
# Arc:   1.37y
# First observation: 2015/09/12
#  Last observation: 2017/01/26
Preliminary a, adot, b, bdot, g, gdot:
  -0.000155   0.023526  -0.000005   0.000749   0.023681   0.000000
# Chi-squared of fit:     2.80 DOF:     40 RMS:  0.06
# Min/Max residuals:    -0.20    0.11
# Exact a, adot, b, bdot, g, gdot:
  1.577884E-05  2.336076E-02  6.971635E-07  7.461517E-04  2.370441E-02  2.742737E-03
# Covariance matrix:
  6.5844E-13  1.8100E-13  8.2485E-15  2.1666E-14  7.4765E-13  3.4857E-11
  1.8100E-13  5.6097E-13  4.5750E-15  2.0665E-14  5.3404E-13  3.1222E-11
  8.2485E-15  4.5750E-15  1.5065E-13 -1.5333E-13  1.1632E-14  4.6482E-13
  2.1666E-14  2.0665E-14 -1.5333E-13  2.7197E-13  3.5678E-14  2.2403E-12
  7.4765E-13  5.3404E-13  1.1632E-14  3.5678E-14  1.1251E-12  5.6201E-11
  3.4857E-11  3.1222E-11  4.6482E-13  2.2403E-12  5.6201E-11  3.3656E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
   -3.392363   49.440546    0.875748   -0.029619   -0.502169  2457278.038539
# Heliocentric elements and errors
Epoch:              2457270.5000  =  2015/09/05
Mean Anomaly:           50.67126 +/-     0.371
Argument of Peri:      235.85386 +/-     0.617
Long of Asc Node:      110.70850 +/-     0.017
Inclination:             3.77969 +/-     0.001
Eccentricity:         0.11324535 +/-    0.0023
Semi-Major Axis:     45.57460484 +/-    0.0238
Time of Perihelion: 2441452.8496 +/-     115.1
Perihelion:          40.41349260 +/-    0.1072
Aphelion:            50.73571708 +/-    0.1084
Period (y)              307.6753 +/-      0.24
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           28.37131577 +/-    0.0012
Ecliptic Y           31.80655976 +/-    0.0014
Ecliptic Z           -2.49626157 +/-    0.0001
Ecliptic XDOT        -0.00184277 +/-    0.0000
Ecliptic YDOT         0.00199213 +/-    0.0000
Ecliptic ZDOT         0.00006734 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.69449759 +/-    0.0013
Geocenter to KBO     42.18623547 +/-    0.0019
# Hcoef:  8.04

The following table shows the complete astrometric record for 15VO169. 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 (15VO169) followed by the observatory code and reference code for the source of the astrometry.

2015 09  12.53775  03 11 45.384  +14 19 21.93  24.9w 15VO169   568  C~2nw2      
2015 10  08.48746  03 10 30.653  +14 12 54.78  24.3w 15VO169   568  C~2nw2      
2015 11  06.30199  03 08 24.441  +14 03 43.70  24.4r 15VO169   568  C~2nw2      
2015 11  06.36535  03 08 24.135  +14 03 42.52  24.6r 15VO169   568  C~2nw2      
2015 11  06.43596  03 08 23.785  +14 03 40.98  24.5r 15VO169   568  C~2nw2      
2015 11  06.50529  03 08 23.449  +14 03 39.76  24.4r 15VO169   568  C~2nw2      
2015 11  07.52528  03 08 18.569  +14 03 19.74  24.2w 15VO169   568  C~2nw2      
2015 11  17.29127  03 07 31.704  +14 00 12.80  24.6w 15VO169   568  C~2nw2      
2015 11  17.34053  03 07 31.462  +14 00 11.90  24.5w 15VO169   568  C~2nw2      
2015 12  13.35388  03 05 35.574  +13 53 10.08  24.5w 15VO169   568  C~2nw2      
2015 12  13.41241  03 05 35.342  +13 53 09.27  24.4w 15VO169   568  C~2nw2      
2016 01  01.40713  03 04 32.173  +13 50 01.74  24.4w 15VO169   568  C~2nw2      
2016 01  07.35336  03 04 17.896  +13 49 30.23  24.4w 15VO169   568  C~2nw2      
2016 02  04.28349  03 03 53.208  +13 50 14.70  24.4w 15VO169   568  C~2nw2      
2016 09  07.54470  03 17 08.116  +14 43 40.86        15VO169   568  C~2nw2      
2016 09  26.60873  03 16 26.044  +14 39 45.78  24.4w 15VO169   568  C~2nw2      
2016 10  10.41976  03 15 38.785  +14 36 01.52  24.8w 15VO169   568  C~2nw2      
2016 10  10.47844  03 15 38.549  +14 36 00.65  24.6w 15VO169   568  C~2nw2      
2016 10  27.51997  03 14 26.066  +14 30 46.68  24.4w 15VO169   568  C~2nw2      
2016 11  03.54499  03 13 53.252  +14 28 32.31  24.7w 15VO169   568  C~2nw2      
2016 12  29.38526  03 09 54.679  +14 14 35.33  24.9w 15VO169   568  C~2nw2      
2017 01  02.39267  03 09 43.570  +14 14 08.12  24.3w 15VO169   568  C~2nw2      
2017 01  26.25843  03 09 05.852  +14 13 34.65  24.4w 15VO169   568  C~2nw2      

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    -0.04       0.00    -0.04
     2   0.0710  -1150.37    -0.12     -82.32     0.02
     3   0.1499  -3067.00     0.08    -118.62     0.03
     4   0.1501  -3071.61     0.11    -118.56     0.08
     5   0.1503  -3076.93    -0.03    -118.66    -0.05
     6   0.1505  -3081.97     0.02    -118.51     0.08
     7   0.1533  -3155.76     0.01    -118.58    -0.02
     8   0.1800  -3863.11     0.06    -113.78    -0.02
     9   0.1802  -3866.75     0.03    -113.69    -0.00
    10   0.2514  -5605.87     0.05     -60.21    -0.01
    11   0.2515  -5609.35     0.08     -60.07    -0.06
    12   0.3035  -6546.30    -0.20      11.47    -0.03
    13   0.3198  -6755.13    -0.01      38.26     0.02
    14   0.3963  -7089.03    -0.05     179.90    -0.03
    15   0.9884   4906.08     0.04     169.41     0.05
    16   1.0406   4255.08    -0.01     102.22     0.05
    17   1.0784   3534.11    -0.01      65.82    -0.11
    18   1.0786   3530.58    -0.05      65.88     0.06
    19   1.1252   2432.46     0.00      40.29     0.03
    20   1.1444   1937.29    -0.02      36.72     0.07
    21   1.2973  -1627.24    -0.04     155.00    -0.14
    22   1.3083  -1790.13     0.03     172.24    -0.01
    23   1.3736  -2327.34     0.05     287.74     0.04

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.

15VO169    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        46.091    46.175    46.012
ecceobj         0.122     0.129     0.116
incobj          3.781     3.781     3.781
qmin           39.589    39.474    39.806
qmax           52.133    52.463    51.751
amean          45.705    45.783    45.627
amin           45.324    45.401    45.254
amax           46.117    46.223    46.030
emean           0.117     0.122     0.111
emin            0.103     0.109     0.097
emax            0.131     0.135     0.124
imean           2.271     2.204     2.271
imin            1.754     1.732     1.757
imax            2.811     2.723     2.804
excite_mean     0.124     0.129     0.118
fracstop        1.000     1.000     1.000
cjmean          3.104     3.103     3.104

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       172.6     188.2     172.9
kozaiamp        179.9     180.0     179.9