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10946 (1999 HR2)
Classification: Main-belt Asteroid          SPK-ID: 2010946
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

[ 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 .2145142458937336 6.9359e-08  
a 2.856787983787037 3.2257e-08 AU
q 2.243966263766681 1.9602e-07 AU
i 15.91330234729504 8.3892e-06 deg
node 47.53262419697691 3.0029e-05 deg
peri 63.84224964035204 3.5571e-05 deg
M 112.718148710233 1.9706e-05 deg
tp 2456248.286793192996
(2012-Nov-16.78679319)
9.4654e-05 JED
period 1763.662344753128
4.83
2.9871e-05
8.178e-08
d
yr
n .2041207043235884 3.4572e-09 deg/d
Q 3.469609703807393 3.9177e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      729  
   data-arc span      8332 days (22.81 yr)  
   first obs. used      1991-09-04  
   last obs. used      2014-06-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .45959  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:25:12  

Additional Information
 Earth MOID = 1.30904 AU 
 T_jup = 3.213 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.8 mag n/a MPO263448  
diameter diameter 16.01 km 0.8 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6
geometric albedo albedo 0.0435   0.005 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6

[ show close-approach data ]
Alternate Designations
 1999 HR2 = 1968 UF3 = 1991 RO9 = 1992 UA10 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]
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