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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .214086916842639 6.9055e-08  
a 2.857673795049632 3.1215e-08 au
q 2.245883222925453 1.9575e-07 au
i 15.91054995397194 7.6249e-06 deg
node 47.50435306487277 2.9658e-05 deg
peri 63.9493134822691 3.4262e-05 deg
M 275.8378303704589 2.0192e-05 deg
tp 2458013.007479329997
(2017-Sep-16.50747933)
0.00010219 JED
period 1764.482703006199
4.83
2.8911e-05
7.915e-08
d
yr
n .204025802795719 3.3429e-09 deg/d
Q 3.469464367173812 3.7898e-08 au
  Orbit Determination Parameters
   # obs. used (total)      754  
   data-arc span      8768 days (24.01 yr)  
   first obs. used      1991-09-04  
   last obs. used      2015-09-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .4727  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Oct-05 13:43:24  

Additional Information
 Earth MOID = 1.30997 au 
 Jupiter MOID = 1.98509 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 12.9 mag n/a MPO347612  
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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