90 Antiope

90 Antiope
90 Antiope from Antiope.zip in Orbiter 2002P3
Designation
Name	90 Antiope
Reference body	Sun
Planetary mean orbits
Epoch	2003.441
Semimajor axis (a)	541 399 341 300 m
Eccentricity (e)	0.154810771
Inclination (i)	2.218798084° (0.038725332 radian)
Longitude of the ascending node (LAN, ☊)	70.35644109° (1.227951547 radian)
Longitude of periapsis (ϖ)	311.6958182° (5.440118292 radian)
Mean longitude (L)	82.86693862° (1.4463009199 radian)
Selected physical parameters
Mean radius	42500 km
Mass	4×1017 kg
Rotation elements
SidRotPeriod	59432 seconds (16.509 hours)
SidRotOffset	0
Obliqutiy	0
LAN	0
Note	*Elements given are from 90 Antiope.cfg (Antiope.zip)

90 Antiopeis a double asteroid with S/2000 (90) 1 in the main asteroid belt between Mars and Jupiter, and was discovered on 1 October 1866 by Robert Luther. The name comes from Greek mythology. 90 Antiope was considered a single body until August 2000 when it was discovered to be two almost identical bodies, the mass differing by less than 2.5%. Antiope is now attributed to the larger body and the smaller body is desgnated as S/2000 (90) 1.

Antiope in Orbiter

90 Antiope was first introduced with the release of MainBeltAsteroids051403.zip in May 2003. Since Orbiter is not written for two bodies revolving about a gravity center, S/2000 (90) 1 is configured to revolve as a standard satellite about Antiope in this release.

In the release of Antiope.zip by Bluefrog in January 2003, 90 Antiope and S2000 90 1 were modeled to orbit around a common gravity center by creating a ficticious body "Antiope" with the solar orbital parameters of the twin body system as given in the table to the right, but, the fictitious body has a radius of 4.25 meters, mass of 10.325×10¹⁶ kg, and was not given any visuals. 90 Antiope and S2000 90 1 were modeled as satellites of the fictitious body, orbiting each at 85000 km from Antiope each with the same mass, radius, and rotation periods.

Sol.cfg is listed like this, 'Planet5' being whatever planet number you assign in your file:
Planet5 = Antiope
Antiope:Moon1 = 90 Antiope
Antiope:Moon2 = S2000 90 1

NOTICE TO PILOTS: The Antiope center body is invisible, but has a hard surface 4.25 meters in radius. Do be very careful when flying between the bodies as not to crash into Antiope.

Note that the landing surface of 90 Antiope as given in the config file is spherical, but the visual of these bodies are not, if you land, you will likely be above or below the visual surface.

Orbiter versions and add-ons which include 90 Antiope
Add-on	Source	Version	Author	Type	Release Date	Compatibility	Wiki article
Antiope	O-F Resources	2004-01-24	Bluefrog	Scenery	24 January 2004
Main Belt Asteroids v1.0	O-F Resources	v1.0	Unknown OHM Addon Developer	Scenery	14 May 2003

See also

90 Antiope at Wikipedia

Gallery

• 

  90 Antiope in Orbiter 2002P3 from MainBeltAsteroids051403.zip
• 

  S/2000 (90) 1 (left) and 90 Antiope (right) in Orbiter 2002P3 from MainBeltAsteroids051403.zip
• 

  90 Antiope from Antiope.zip in Orbiter 2003P2
• 

  90 Antiope (left) and S/2000 (90) 1 (right) from Antiope.zip in Orbiter 2003P2
• 

  Very Large Telescope images of 90 Antiope and S/2000 (90) 1 in 2004

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