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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .293418864364302 5.8825e-08  
a 2.62306069954895 2.0781e-08 AU
q 1.853405207928665 1.4859e-07 AU
i 13.03124539544768 6.267e-06 deg
node 145.2759456087554 2.6938e-05 deg
peri 213.398870078494 2.9674e-05 deg
M 221.2470301485334 1.7115e-05 deg
tp 2457598.568218469237
(2016-Jul-29.06821847)
7.9477e-05 JED
period 1551.711353489633
4.25
1.844e-05
5.049e-08
d
yr
n .2320019114317869 2.757e-09 deg/d
Q 3.392716191169234 2.6879e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      764  
   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      .5017  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jan-08 02:13:46  

Additional Information
 Earth MOID = .862303 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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