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312579 (2009 HY77)
Classification: Main-belt Asteroid          SPK-ID: 2312579
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09541587003583926 1.3602e-07  
a 2.515519812488126 2.5103e-08 au
q 2.27549930098718 3.4195e-07 au
i 7.987144638213764 6.6587e-06 deg
node 78.61456711282101 6.2595e-05 deg
peri 143.9741771992664 7.4105e-05 deg
M 276.4650476639956 4.1803e-05 deg
tp 2459338.647178932450
(2021-May-04.14717893)
0.00016993 TDB
period 1457.270052971755
3.99
2.1813e-05
5.972e-08
d
yr
n .2470372593369814 3.6978e-09 deg/d
Q 2.755540323989071 2.7498e-08 au
  Orbit Determination Parameters
   # obs. used (total)      156  
   data-arc span      8281 days (22.67 yr)  
   first obs. used      1997-05-03  
   last obs. used      2020-01-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .63112  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-30 06:37:52  

Additional Information
 Earth MOID = 1.27104 au 
 Jupiter MOID = 2.23601 au 
 T_jup = 3.439 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.0   n/a MPO455304  
diameter diameter 2.353 km 0.513 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.038   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

312579 (2009 HY77)          Discovered 2009-Apr-27 by PMO NEO Survey Program at Purple Mountain
Reference: 20120109/Numbers.arcLast Updated: 2012-01-11

Alternate Designations
 2009 HY77 = 2003 WO185 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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