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216451 Irsha (2009 HP12)
Classification: Main-belt Asteroid          SPK-ID: 2216451
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1649487505746859 4.2792e-08  
a 2.357755812714332 1.4637e-08 au
q 1.9688469372469 9.4649e-08 au
i 5.986352030405811 4.0906e-06 deg
node 138.3629299282952 3.4935e-05 deg
peri 44.32440163092658 3.8003e-05 deg
M 98.36788823390675 1.2645e-05 deg
tp 2458839.175416725637
(2019-Dec-21.67541673)
4.6135e-05 TDB
period 1322.350741834203
3.62
1.2314e-05
3.371e-08
d
yr
n .2722424456771976 2.5351e-09 deg/d
Q 2.746664688181764 1.7051e-08 au
  Orbit Determination Parameters
   # obs. used (total)      329  
   data-arc span      8184 days (22.41 yr)  
   first obs. used      1998-03-24  
   last obs. used      2020-08-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56386  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 23:54:52  

Additional Information
 Earth MOID = .976662 au 
 Jupiter MOID = 2.21819 au 
 T_jup = 3.528 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.15   n/a E2021B55  

216451 Irsha           Discovered 2009 Apr. 19 at Andrushivka.
Located on the Irsha river, the ancient city of Malyn in Ukraine is noted for the museum of Nikolaj Miklukho-Maklaj (1846-1888), a prominent ethnologist, biologist, and anthropologist. His place of birth is not definitely known, but the city has been considered a possibility.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20091202/MPCPages.arcLast Updated: 2010-04-12

[ show close-approach data ]
Alternate Designations
 2009 HP12 = 1998 FB93 = 2007 TP305 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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