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11840 (1986 QR2)
Classification: Main-belt Asteroid          SPK-ID: 2011840
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2935059954521393 5.1978e-08  
a 2.623932233367153 1.9564e-08 au
q 1.853792391213771 1.3259e-07 au
i 13.03086104275424 5.5498e-06 deg
node 145.2736829459503 2.6856e-05 deg
peri 213.3348037542273 2.9599e-05 deg
M .4908800096476187 1.8106e-05 deg
tp 2457598.383100723568
(2016-Jul-28.88310072)
7.806e-05 JED
period 1552.484771303773
4.25
1.7363e-05
4.754e-08
d
yr
n .2318863325774672 2.5935e-09 deg/d
Q 3.394072075520534 2.5307e-08 au
  Orbit Determination Parameters
   # obs. used (total)      845  
   data-arc span      10552 days (28.89 yr)  
   first obs. used      1986-08-01  
   last obs. used      2015-06-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49511  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 12:08:01  

Additional Information
 Earth MOID = .861404 au 
 Jupiter MOID = 2.07512 au 
 T_jup = 3.306 
[ 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 PDS3 (MPC 36230)  

11840 (1986 QR2)          Discovered 1986-Aug-28 by Debehogne, H. at La Silla
Reference: 19991026/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1986 QR2 = 1992 CG6 = 1998 HD125 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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