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9729 (1981 RQ)
Classification: Main-belt Asteroid          SPK-ID: 2009729
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1836470775035116 1.0082e-07  
a 2.579291397573408 2.1414e-08 au
q 2.105612070379103 2.7097e-07 au
i 13.09945857143038 9.5116e-06 deg
node 335.9253728168547 1.9228e-05 deg
peri 28.87305343717621 2.6918e-05 deg
M 99.3566565101755 1.7113e-05 deg
tp 2456982.916327823785
(2014-Nov-21.41632782)
7.0624e-05 JED
period 1513.035233507897
4.14
1.8843e-05
5.159e-08
d
yr
n .237932331004188 2.9631e-09 deg/d
Q 3.052970724767712 2.5347e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1129  
   data-arc span      12520 days (34.28 yr)  
   first obs. used      1981-09-07  
   last obs. used      2015-12-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51841  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:11:43  

Additional Information
 Earth MOID = 1.10919 au 
 Jupiter MOID = 2.41669 au 
 T_jup = 3.366 
[ 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 13.3 mag n/a MPO309227  

9729 (1981 RQ)          Discovered 1981-Sep-07 by Mrkos, A. at Klet
Reference: 19981208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1981 RQ = 1985 QU 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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