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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 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .293319574106783 5.8814e-08  
a 2.623183700229066 2.0818e-08 AU
q 1.853752574474021 1.4853e-07 AU
i 13.03112346640384 6.2674e-06 deg
node 145.2756754719863 2.6955e-05 deg
peri 213.4203767103031 2.9693e-05 deg
M 174.8084594060325 1.6693e-05 deg
tp 2456046.968470192896
(2012-Apr-29.46847019)
6.5309e-05 JED
period 1551.820499146829
4.25
1.8473e-05
5.058e-08
d
yr
n .2319855938221743 2.7616e-09 deg/d
Q 3.39261482598411 2.6924e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      756  
   data-arc span      10184 days (27.88 yr)  
   first obs. used      1986-08-01  
   last obs. used      2014-06-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50375  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:27:05  

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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