Orbit Fit and Astrometric record for 18VO35

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: 18VO35    
# Created Tue Apr  1 01:11:09 2025
# Orbit generated from Bernstein formalism
# Fitting     11 observations of     11
# Arc:   1.05y
# First observation: 2018/11/10
#  Last observation: 2019/11/30
Preliminary a, adot, b, bdot, g, gdot:
  -0.000031   0.010661   0.000003  -0.003195   0.015214   0.000000
# Chi-squared of fit:     6.63 DOF:     16 RMS:  0.14
# Min/Max residuals:    -0.22    0.39
# Exact a, adot, b, bdot, g, gdot:
  1.143213E-05  1.058075E-02 -4.321173E-06 -3.157313E-03  1.527007E-02 -7.670132E-03
# Covariance matrix:
  6.2861E-13  1.2422E-12  8.5991E-14 -8.1895E-13  1.4714E-12  2.1521E-10
  1.2422E-12  1.4698E-11  7.8351E-13 -7.1530E-12  1.0157E-11  1.8703E-09
  8.5991E-14  7.8351E-13  2.7421E-13 -7.1706E-13  5.7670E-13  1.0685E-10
 -8.1895E-13 -7.1530E-12 -7.1706E-13  4.7207E-12 -5.3138E-12 -9.7602E-10
  1.4714E-12  1.0157E-11  5.7670E-13 -5.3138E-12  7.9900E-12  1.3910E-09
  2.1521E-10  1.8703E-09  1.0685E-10 -9.7602E-10  1.3910E-09  2.5522E-07
#      lat0       lon0       xBary       yBary       zBary        JD0
   -8.739097   83.142345    0.572090   -0.123683   -0.805296  2458432.987961
# Heliocentric elements and errors
Epoch:              2458430.5000  =  2018/11/08
Mean Anomaly:          329.84233 +/-     3.766
Argument of Peri:      310.54216 +/-     0.722
Long of Asc Node:      236.20139 +/-     0.008
Inclination:            18.82813 +/-     0.005
Eccentricity:         0.62771351 +/-    0.0388
Semi-Major Axis:     94.14905300 +/-    7.4937
Time of Perihelion: 2486382.8060 +/-    1021.8
Perihelion:          35.05042092 +/-    4.5984
Aphelion:           153.24768508 +/-   12.7335
Period (y)              913.5496 +/-    109.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X            8.39352831 +/-    0.0015
Ecliptic Y           64.99756138 +/-    0.0119
Ecliptic Z           -9.95019380 +/-    0.0019
Ecliptic XDOT        -0.00204842 +/-    0.0000
Ecliptic YDOT        -0.00121077 +/-    0.0001
Ecliptic ZDOT        -0.00035077 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   66.28831466 +/-    0.0117
Geocenter to KBO     65.48758126 +/-    0.0121
# Hcoef:  6.75

The following table shows the complete astrometric record for 18VO35. 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 (18VO35) followed by the observatory code and reference code for the source of the astrometry.

2018 11  10.48716  05 31 59.323  +14 32 01.13  24.7r 18VO35    568  C~2ygZ      
2018 11  10.58061  05 31 59.072  +14 32 00.16  24.8r 18VO35    568  C~2ygZ      
2018 12  09.25228  05 30 30.474  +14 28 42.53        18VO35    304  C~2ygZ      
2018 12  10.24562  05 30 27.140  +14 28 37.60  24.9r 18VO35    304  C~2ygZ      
2018 12  11.25815  05 30 23.755  +14 28 32.39        18VO35    304  C~2ygZ      
2019 02  02.10060  05 27 47.432  +14 27 43.91  24.8r 18VO35    304  C~2ygZ      
2019 02  03.07790  05 27 45.461  +14 27 47.21  24.9r 18VO35    304  C~2ygZ      
2019 03  01.02627  05 27 13.110  +14 29 45.88  25.0r 18VO35    304  C~4ZZD      
2019 03  02.02761  05 27 12.675  +14 29 51.65  25.0r 18VO35    304  C~4ZZD      
2019 11  29.25582  05 33 37.032  +14 20 30.81  24.9r 18VO35    304  C~4ZZD      
2019 11  30.25092  05 33 33.811  +14 20 24.28  25.0r 18VO35    304  C~4ZZD      

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    -0.10       0.00     0.22
     2   0.0003     -3.69    -0.06      -0.79     0.03
     3   0.0788  -1298.57    -0.11    -134.00    -0.07
     4   0.0815  -1347.18    -0.00    -136.47     0.02
     5   0.0842  -1396.54     0.39    -139.18    -0.22
     6   0.2289  -3666.82    -0.09     -69.02    -0.14
     7   0.2316  -3695.23    -0.14     -64.19     0.22
     8   0.3026  -4158.16     0.10      79.70     0.02
     9   0.3054  -4164.16     0.00      85.81    -0.11
    10   1.0507   1384.47    -0.01    -757.92     0.11
    11   1.0534   1337.40     0.01    -762.22    -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.

18VO35    quality flag:0

Type:      ERR2LARGE ERR2LARGE ERR2LARGE

axisobj         0.000     0.000     0.000
ecceobj        -1.000    -1.000    -1.000
incobj         -1.000    -1.000    -1.000
qmin            0.000     0.000     0.000
qmax            0.000     0.000     0.000
amean           0.000     0.000     0.000
amin            0.000     0.000     0.000
amax            0.000     0.000     0.000
emean           0.000     0.000     0.000
emin            0.000     0.000     0.000
emax            0.000     0.000     0.000
imean           0.000     0.000     0.000
imin            0.000     0.000     0.000
imax            0.000     0.000     0.000
excite_mean     0.000     0.000     0.000
fracstop        0.000     0.000     0.000
cjmean          0.000     0.000     0.000

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         0.0       0.0       0.0
kozaiamp          0.0       0.0       0.0