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7631 Vokrouhlicky (1981 WH)
Classification: Main-belt Asteroid          SPK-ID: 2007631
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .28252620908682 6.2875e-08  
a 2.371533692169427 1.1686e-08 AU
q 1.701513268399129 1.5021e-07 AU
i 4.030859880312999 6.6559e-06 deg
node 136.1731351891104 9.8777e-05 deg
peri 274.0044452935117 9.9559e-05 deg
M 14.7583982684975 1.3635e-05 deg
tp 2456945.813629482966
(2014-Oct-15.31362948)
5.0281e-05 JED
period 1333.958674103222
3.65
9.8601e-06
2.7e-08
d
yr
n .2698734278571386 1.9948e-09 deg/d
Q 3.041554115939724 1.4988e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      976  
   data-arc span      22548 days (61.73 yr)  
   first obs. used      1953-01-09  
   last obs. used      2014-10-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51964  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Nov-10 13:05:02  

Additional Information
 Earth MOID = .717505 AU 
 T_jup = 3.486 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.8 mag n/a MPO263417  

7631 Vokrouhlický           Discovered 1981 Nov. 20 by E. Bowell at the Anderson Mesa Station of the Lowell Observatory.
Named in honor of David Vokrouhlický (b. 1966), a Czech physicist at Charles University, Prague, who has developed new physical models for the nongravitational forces acting on small minor planets and meteoroids. In particular, Vokrouhlický has studied the so-called Yarkovsky effect, which causes a slow orbital drift into main-belt resonances and is an important mechanism for transporting meteorites to Earth. Name proposed and citation written by P. Farinella.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19990728/MPCPages.arcLast Updated: 2010-06-11

Alternate Designations
 1981 WH = 1975 BJ 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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