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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .183313216137373 7.7382e-08  
a 2.580757383518222 1.6715e-08 au
q 2.107670447475225 2.0473e-07 au
i 13.0954647689768 8.6081e-06 deg
node 335.9273960618369 1.7789e-05 deg
peri 29.03945282317989 2.6107e-05 deg
M 146.7378796200899 1.7117e-05 deg
tp 2456983.253077804109
(2014-Nov-21.75307780)
7.0602e-05 JED
period 1514.325357336688
4.15
1.4712e-05
4.028e-08
d
yr
n .2377296254439984 2.3096e-09 deg/d
Q 3.053844319561219 1.978e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1275  
   data-arc span      12642 days (34.61 yr)  
   first obs. used      1981-09-07  
   last obs. used      2016-04-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52022  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:06:13  

Additional Information
 Earth MOID = 1.11221 au 
 Jupiter MOID = 2.41661 au 
 T_jup = 3.365 
[ 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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