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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 ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05948654759593959 4.5655e-08  
a 3.044620901334618 2.6645e-08 au
q 2.863506915175784 1.4313e-07 au
i 10.96536942002539 5.7838e-06 deg
node 184.1138757730906 2.4518e-05 deg
peri 73.6811785127646 5.5899e-05 deg
M 349.1756829508935 4.7939e-05 deg
tp 2459058.844008965190
(2020-Jul-28.34400897)
0.00025819 TDB
period 1940.431265287255
5.31
2.5472e-05
6.974e-08
d
yr
n .1855257676167709 2.4354e-09 deg/d
Q 3.225734887493453 2.823e-08 au
  Orbit Determination Parameters
   # obs. used (total)      345  
   data-arc span      8119 days (22.23 yr)  
   first obs. used      1998-03-22  
   last obs. used      2020-06-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57742  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-24 04:34:59  

Additional Information
 Earth MOID = 1.87443 au 
 Jupiter MOID = 1.82037 au 
 T_jup = 3.208 
[ 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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