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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 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2933195665163372 6.1588e-08  
a 2.623183686136576 1.6643e-08 AU
q 1.853752584426268 1.5758e-07 AU
i 13.03112664567834 6.8496e-06 deg
node 145.2756314440623 2.8829e-05 deg
peri 213.4204373501013 3.1733e-05 deg
M 174.8084535027632 1.6648e-05 deg
tp 2456046.968501711881
(2012-Apr-29.46850171)
6.6626e-05 JED
period 1551.820486641597
4.25
1.4768e-05
4.043e-08
d
yr
n .2319855956916133 2.2077e-09 deg/d
Q 3.392614787846884 2.1524e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      750  
   data-arc span      10108 days (27.67 yr)  
   first obs. used      1986-08-01  
   last obs. used      2014-04-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52327  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Apr-17 14:01:09  

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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