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13423 Bobwoolley (1999 VR22)
Classification: Main-belt Asteroid          SPK-ID: 2013423
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07538150005120699 1.0356e-08  
a 2.749703568354187 1.0793e-08 au
q 2.542426788675492 3.3444e-08 au
i 4.027137713993286 7.2046e-07 deg
node 285.5002604963431 1.0134e-05 deg
peri 92.89948091691643 1.8998e-05 deg
M 283.5709014854344 1.7775e-05 deg
tp 2459750.076570501254
(2022-Jun-19.57657050)
8.2792e-05 TDB
period 1665.433295097593
4.56
9.8054e-06
2.685e-08
d
yr
n .2161599633318873 1.2727e-09 deg/d
Q 2.956980348032882 1.1606e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2387  
   data-arc span      18234 days (49.92 yr)  
   first obs. used      1971-07-27  
   last obs. used      2021-06-28  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44853  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 03:15:41  

Additional Information
 Earth MOID = 1.54734 au 
 Jupiter MOID = 2.42185 au 
 T_jup = 3.339 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457454.5 (2016-Mar-07.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07495897229149842 1.0257e-08  
q 2.542140954936835 3.3229e-08 au
tp 2458091.488606619216
(2017-Dec-03.98860662)
8.1081e-05 TDB
node 285.5125316094177 1.0133e-05 deg
peri 94.19691095803871 1.9066e-05 deg
i 4.028137933694632 7.2085e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2387  
   data-arc span      18234 days (49.92 yr)  
   first obs. used      1971-07-27  
   last obs. used      2021-06-28  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44853  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 03:15:41  

Additional Information
 Jupiter MOID = 2.42185 au 
 T_jup = 3.339 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.052091030582413E-16 -3.26756484145579E-16 -1.989065251538733E-13 -3.124587649092223E-14 -2.687916959709812E-15 -2.477547982703435E-17
q -3.26756484145579E-16 1.104162919393286E-15 6.807590499647556E-13 8.595635273062628E-14 2.40872253660317E-14 1.765016428214706E-16
tp -1.989065251538733E-13 6.807590499647556E-13 6.574171357204229E-9 -3.309590412200781E-11 1.309307071684923E-9 4.333925363930877E-12
node -3.124587649092223E-14 8.595635273062628E-14 -3.309590412200781E-11 1.026779552621362E-10 -1.085345385069854E-10 -4.558427908781713E-12
peri -2.687916959709812E-15 2.40872253660317E-14 1.309307071684923E-9 -1.085345385069854E-10 3.635197489024461E-10 5.516350993642778E-12
i -2.477547982703435E-17 1.765016428214706E-16 4.333925363930877E-12 -4.558427908781713E-12 5.516350993642778E-12 5.196217868929966E-13

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.17   n/a E2021B10  
diameter diameter 12.349 km 0.063 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.076   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

13423 Bobwoolley           Discovered 1999 Nov. 13 by C. W. Juels at Fountain Hills.
Robert Woolley (b. 1953) taught astronomy and was planetarium director at Montgomery College (1976-1981) and president of the Von Braun Astronomical Society (1993-1994). Since 1994 he has been conducting week-long astronomical/geological educational experiences at a dark site near Flagstaff, Arizona.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010109/MPCPages.arcLast Updated: 2009-05-11

Alternate Designations
 1999 VR22 = 1971 OY = 1971 QC2 = 1985 QN4 = 1990 UC3 = 1990 WC13 = 1996 BD13 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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