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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2144279701398321 6.9295e-08  
a 2.85719455746621 3.1981e-08 AU
q 2.244532128214154 1.9602e-07 AU
i 15.91124631699708 8.2205e-06 deg
node 47.52782801255455 2.9907e-05 deg
peri 63.88419997918603 3.5226e-05 deg
M 153.4926682696151 1.9758e-05 deg
tp 2456248.369356489497
(2012-Nov-16.86935649)
9.3784e-05 JED
period 1764.038860723754
4.83
2.9618e-05
8.109e-08
d
yr
n .2040771368564399 3.4264e-09 deg/d
Q 3.469856986718265 3.8839e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      736  
   data-arc span      8697 days (23.81 yr)  
   first obs. used      1991-09-04  
   last obs. used      2015-06-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .45903  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 12:05:46  

Additional Information
 Earth MOID = 1.30988 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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