Albireo (star)

Albireo Aa
Spectral	K3 II
Type	Bright giant
Multiple	Trinary
Luminosity	1200 LSol
Absolute magnitude	-2.45
Mag Terra	3.18
Temperature	4080° K
Mass	5.0 MSol
Radius	70 RSol
Companion	Albireo Ac & Albireo B

Albireo Ac
Spectral	B9.5 V
Type	Main sequence
Luminosity	230 LSol
Absolute magnitude	-0.25
Mag Terra	5.82
Temperature	12,000° K
Mass	3.2 MSol
Radius	3.5 RSol
Companion	Albireo Aa & Albireo B

Albireo B
Spectral	B8 Ve
Type	Main sequence
Luminosity	230 LSol
Absolute magnitude
Mag Terra	5.09
Temperature	13,200° K
Mass	3.7 MSol
Radius	2.7 RSol
Companion	Albireo Aa/Ac

The star Albireo (otherwise known as Beta Cygni) is a trinary star about 430 light-years from Sol system.

Description (Specifications)

When viewed with the naked eye from the Sol system, Albireo appears to be a single star. However, in a telescope it readily resolves into a double star, consisting of the components Albireo A (a yellow-amber colored K3 II bright giant), and Albireo B (a "blue-green" colored B8 Ve main-sequence star).

• Albireo A is itself a binary as well, composed of the components Albireo Aa (the K3 II star mentioned above) and Albireo Ac (a blue B9.5 V main-sequence star). The A and B components provide one of the best contrasting double stars in Terra's night sky on account of their different colors. Albireo Aa and Albireo Ac have an orbital period about one another of about 213 years.
• Albireo B is a fast-rotating B8 Ve star, with an equatorial rotational velocity of at least 250 kilometers per second. Its surface temperature is estimated to be about 13,200 K.
• Due to their wide physical separation, it is not known whether the two components are orbiting around each other in a physical binary system. If so, the orbital period would be approximately 100,000 years.

The Albireo star system is approximately 130pc from Terra, and is located in a Coreward/Corespinward direction from Terra at bearing 062.1^o Galactic Longitude and +4.6^o North Galactic Latitude.

History & Background (Dossier)

Though it is in the same local area of space, Albireo is NOT the primary star of the world Beta Cygnus 4/Ilelish (Ilelish 3006). The primary of Beta Cygnus 4 is a binary pair of M0 V stars that lie very close to the actual location of the star Beta Cygni, which likely lends the world its name.

Image Repository

TravellerMap (T5SS):
[1]

References & Contributors (Sources)

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This page uses content from Wikipedia. The original article was at Albireo. The list of authors can be seen in the page history. The text of Wikipedia is available under the Commons Attribution-ShareAlike 3.0 Unported License.

This list of sources was used by the Traveller Wiki Editorial Team and individual contributors to compose this article. Copyrighted material is used under license from Far Future Enterprises or by permission of the author. The page history lists all of the contributions.

• EXTERNAL LINK: SIMBAD @ University of Strasbourg: [2]
• Traveller Wiki Editorial Team
• Author & Contributor: WHULorigan
• Author & Contributor: Lord (Marquis) and Master of Sophontology Maksim-Smelchak of the Ministry of Science