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JPL Small-Body Database Browser
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243450 (2009 HY21)
Classification: Main-belt Asteroid          SPK-ID: 2243450
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05906518067181595 4.7597e-08  
a 3.043756856160936 3.6868e-08 au
q 2.863976807530712 1.5679e-07 au
i 10.96637257500442 8.3278e-06 deg
node 184.1215296483337 2.6235e-05 deg
peri 73.62065285400651 8.2288e-05 deg
M 274.9639297202726 8.1222e-05 deg
tp 2459058.656701621444
(2020-Jul-28.15670162)
0.00044123 TDB
period 1939.605299741147
5.31
3.5241e-05
9.648e-08
d
yr
n .1856047722946748 3.3723e-09 deg/d
Q 3.22353690479116 3.9046e-08 au
  Orbit Determination Parameters
   # obs. used (total)      278  
   data-arc span      7701 days (21.08 yr)  
   first obs. used      1998-03-22  
   last obs. used      2019-04-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60488  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 12:10:48  

Additional Information
 Earth MOID = 1.87465 au 
 Jupiter MOID = 1.8227 au 
 T_jup = 3.209 
[ 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 15.3   n/a MPO433595  

243450 (2009 HY21)          Discovered 2009-Apr-16 by CSS at Catalina
Reference: 20100626/Numbers.arcLast Updated: 2010-06-28

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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