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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2933195665508107 6.1606e-08  
a 2.623183686134844 1.6648e-08 AU
q 1.853752584334613 1.5763e-07 AU
i 13.03112671536334 6.9218e-06 deg
node 145.2756307280806 3.0557e-05 deg
peri 213.4204382097845 3.3623e-05 deg
M 174.8084533887809 1.7001e-05 deg
tp 2456046.968502203961
(2012-Apr-29.46850220)
6.8226e-05 JED
period 1551.820486640059
4.25
1.4773e-05
4.045e-08
d
yr
n .2319855956918431 2.2084e-09 deg/d
Q 3.392614787935074 2.1531e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      722  
   data-arc span      10085 days (27.61 yr)  
   first obs. used      1986-08-01  
   last obs. used      2014-03-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51433  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Mar-22 10:59:06  

Additional Information
 Earth MOID = .861097 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 (809)
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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