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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 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2145143281851369 7.4511e-08  
a 2.856787974889274 3.2161e-08 AU
q 2.243966021688524 2.1288e-07 AU
i 15.91330424129632 8.8149e-06 deg
node 47.53259936775191 3.366e-05 deg
peri 63.84227802188033 4.0077e-05 deg
M 112.7181478567415 2.0799e-05 deg
tp 2456248.286799954192
(2012-Nov-16.78679995)
0.00010064 JED
period 1763.662336513464
4.83
2.9782e-05
8.154e-08
d
yr
n .2041207052772212 3.4469e-09 deg/d
Q 3.469609928090025 3.906e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      714  
   data-arc span      8231 days (22.54 yr)  
   first obs. used      1991-09-04  
   last obs. used      2014-03-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49267  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Apr-17 13:59:26  

Additional Information
 Earth MOID = 1.30903 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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