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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09563438980107344 1.5612e-07  
a 2.515390803646257 2.5395e-08 au
q 2.274832939028316 3.9065e-07 au
i 7.987703777908253 6.751e-06 deg
node 78.61521031932467 6.4235e-05 deg
peri 143.8969748604476 7.7935e-05 deg
M 177.7521432131359 4.6169e-05 deg
tp 2457881.019587230635
(2017-May-07.51958723)
0.0001871 TDB
period 1457.157949912305
3.99
2.2066e-05
6.041e-08
d
yr
n .2470562645742458 3.7413e-09 deg/d
Q 2.755948668264199 2.7823e-08 au
  Orbit Determination Parameters
   # obs. used (total)      152  
   data-arc span      7805 days (21.37 yr)  
   first obs. used      1997-05-03  
   last obs. used      2018-09-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .65336  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-04 10:53:25  

Additional Information
 Earth MOID = 1.27045 au 
 Jupiter MOID = 2.23623 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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