* Astronomy

Members Login
Username 
 
Password 
    Remember Me  
Home -> Astronomy News -> Solar System -> Asteroid 2009 HC82
Post Info TOPIC: Asteroid 2009 HC82
Blobrana


L

Posts: 131433
Date:
RE: Asteroid 2009 HC82
Permalink  
 

Removed as an Earth Impact Risk.

__________________
Blobrana


L

Posts: 131433
Date:
Permalink  
 
 

Orbital elements:
2009 HC82                                                Earth MOID = 0.1429 AU
Epoch 2010 July 23.0 TT = JDT 2455400.5                 MPC
M 153.74013              (2000.0)            P               Q
n   0.24522695     Peri.  298.42477     +0.92044033     -0.02023311
a   2.5278847      Node   294.85605     +0.06039728     -0.97930421
e   0.8071912      Incl.  154.51905     -0.38618877     -0.20137997
P   4.02           H   16.0           G   0.15           U   4

MPEC 2010 - H67

__________________
Blobrana


L

Posts: 131433
Date:
Permalink  
 

2009 HC82
Earth Impact Risk Summary
Torino Scale (maximum) 0
Palermo Scale (maximum) -2.16
Palermo Scale (cumulative) -2.15
Impact Probability (cumulative) 3.4e-09
Number of Potential Impacts 3
Vimpact 61.94 km/s
Vinfinity 60.92 km/s
H 16.3
Diameter 1.900 km
Mass 8.9e+12 kg
Energy 4.1e+06 MT
all above are mean values
weighted by impact probability
Analysis based on
26 observations spanning 5.8252 days
(2009-Apr-29.37373 to 2009-May-05.19896)



__________________
Blobrana


L

Posts: 131433
Date:
Permalink  
 

From observations of its position by five different groups, Sonia Keys of the International Astronomical Union's Minor Planet Centre calculated it orbits the sun every 3.39 years on a path that ventures within 3.5 million km of the Earth's orbit. Combined with its size, that makes 2009 HC82 a potentially hazardous asteroid.

Source

__________________
Blobrana


L

Posts: 131433
Date:
Permalink  
 

The discovery of a 2- to 3-kilometre-wide asteroid in an orbit that goes backwards has set astronomers scratching their heads. It comes closer to Earth than any other object in a 'retrograde' orbit, and astronomers think they should have spotted it before.

Read more

__________________
Blobrana


L

Posts: 131433
Date:
Permalink  
 

Asteroid 2009 HC82 was discovered by the Catalina Sky Survey (CSS) on the 29th April, 2009.
The 1500 - 3300 meter wide asteroid 2009 HC82 has an unusual retrograde orbit.

__________________
Blobrana


L

Posts: 131433
Date:
Permalink  
 
 

Orbital elements:
2009 HC82                                           PHA, Earth MOID = 0.0235 AU
Epoch 2009 June 18.0 TT = JDT 2455000.5                 MPC
M  64.79849              (2000.0)            P               Q
n   0.29099311     Peri.  291.70705     +0.91746366     +0.06497679
a   2.2553516      Node   293.55963     +0.15508685     -0.96693369
e   0.8222477      Incl.  154.64869     -0.36634479     -0.24661155
P   3.39           H   16.2           G   0.15           U   9

MPEC 2009 - J04

__________________
Page 1 of 1  sorted by
 
Quick Reply

Please log in to post quick replies.
Home -> Astronomy News -> Solar System -> Asteroid 2009 HC82


Create your own FREE Forum
Report Abuse 		Powered by ActiveBoard