2008 EA9

2008 EA9
2008 EA9 in Orbiter
Designation
Name	2008 EA9
Reference body	Sun
Number of satellites	0
Planetary mean orbits
Epoch	2456200.5
Semimajor axis (a)	158445707km (1.0591441317518 AU)
Eccentricity (e)	0.07979741866638632
Inclination (i)	0.00740892102487189 radian (0.4244999054709°)
Longitude of the ascending node (LAN, ☊)	2.25946066154116 radian 129.457559882145°
Longitude of periapsis (ϖ)	5.86213737085752 radian 335.875730276052°
Perihelion distance	145,802,148 km (0.974627164042352 AU)
Mean anomaly	2.13421261863746 radian (122.28137563149°)
Time of perihelion passage	2456065.265083140718 JED (2012 May 17.76508314)
Orbital period	398.1356099236119 d (1.09 yr)
Mean motion	0.9042145214518018 °/d
Aphelion distance	171,089,265 km (1.143661099461241 AU)
Rotational Elements
	2008 EA9 does not rotate, the body maintains the same sidereal orientation over time.
Selected physical parameters
Mean radius	10 m
Mass	1200000 kg
Note	*Elements given are from 2008 EA9.pdf.

2008 EA9 is a very small near-Earth object about 17 meters in diameter, first detected by NASAs Center for Near-Earth Object Studies (CNEOS), and is in an Earth-crossing orbit.

The Orbiter version was created by joffrey in 2012. It was modeled as a vessel rather than as a body.

It is a strange critter. It has size (10 meters diameter), it is visible, it has mass (1.2 million kg), which gives it a density of 764 kg/m, but it has no gravity. It does not rotate keeping the same orientation to the celestial sphere over time, therefore it has no poles nor equator. It cannot be selected as a reference body, but it can be selected as a target.

As a vessel, it can be targeted as stated before, has 6 invisible docks each with a COMNAV frequency assigned, but you cannot switch ships into it. In order for it to be the focus vessel, it must be stated as the focus vessel in the scenario file before launching the scenario. If you then switch from 2008 EA9 into another vessel, you cannot switch back, it does not appear in the switch ship list. Once you dock with it, you cannot change its orientation with engines or thrusters.

But, it is an interesting entity to rendezvous and dock with. The dock and land lights on the DeltaGlider work at 2008 EA9.

Port	COM/NAV Frequency (MHz)
Transponder	133.00
1	133.05
2	133.10
3	133.15
4	133.20
5	133.25
6	133.30

Orbiter versions and add-ons which include Ceres
Add-on	Source	Version	Author	Type	Release Date	Compatibility	Wiki article
Asteroid 2008 EA9 (dockable)	Pappy's Hangar	20131009	Joffrey	Scenery	9 October 2013	Orbiter 2013
Asteroid 2008 EA9 (dockable)	O-F Resources	2012-11-13	joffrey	Scenery	13 November 2012	D3D9Client

A couple notes about both 2008EA9.zip and asteroid_2008_EA9_for_Orbiter2010.zip after installation as directed by the readme.txt file, Orbiter2010P1 crashed to the desktop and gave me a warning to check the log file. Checking the log, it could not find the planet "2008 EA9". I moved the config file from \config\Vessels\Asteroids directory to the \config directory. Next runtime I got a message that it could not find the vessel, so I copied the file back to the Asteroids directory, so that there was a copy in each directory. Then when during runtime, when I directed the camera to look at EA9, it was listed at "obj1", it could not display the name correctly. Then I opened the config file in the \config directory and added "NAME=2008 EA9 at the top, saved it, now, the name is displayed correctly. However, in all scenarios, the body is rendered as a white faceted ball, it did not render the mesh, except in the scenarios "2. Arrival at 2008 EA9.scn" and "3. Anchored on 2008 EA9.scn" where it is correctly rendered.

Gallery

• 

  2008 EA9 from 2008EA9.zip in Orbiter 2010P1
• 

  2008 EA9 from asteroid_2008_EA9_for_Orbiter 2010.zip in Orbiter 2010P1
• 

  Orbit of 2008 EA9 compared to those of the inner planets
  from JPL Horizons