View source for Omicron (2) Eridani

{{Needs WikiMagic|This page is a Wikipedia or SolStation data dump with little or no relation – or, worse yet, with contradictions – to the situation in Fenspace.}}{{Starbox
|name=Omicron Eridani A
|image=
|image_size=
|caption=
|constellation=Eridanus
|right ascension=04h 15m 16.32s
|declination=-07° 39' 10.34"
|spectral type=K1 Ve
|distance=16.5 ly
|other designations=Omi2 Eri A, 40 Eri A, HR 1325, Gl 166 A, Hip 19849, HD 26965, BD-07 780, SAO 131063, LHS 23, LTT 1907.
}}{{Starbox
|name=Omicron Eridani B
|image=
|image_size=
|caption=
|constellation=Eridanus
|right ascension=04h 15m 16.32s
|declination=-07° 39' 10.34"
|spectral type=DA4 /VII
|distance=16.5 ly
|other designations=mi2 Eri B, 40 Eri B, Gl 166 B, HD 26976, BD-07 781, G 160-60, LHS 24, ADS 3093, W 33, Struve 518.
}}{{Starbox
|name=Omicron Eridani C
|image=
|image_size=
|caption=
|constellation=Eridanus
|right ascension=04h 15m 16.32s
|declination=-07° 39' 10.34"
|spectral type=M4.5 Ve
|distance=16.5 ly
|other designations=DY Eri, Omi2 C, 40 Eri C, Gl 166 C, LTT 1909, LHS 25.
}}
Also known as '''Keid''', this triple star system is located less than 16.5 light-years (ly) away in the northernmost part<ref>04:15:16.32-07:39:10.34, ICRS 2000.0</ref> of Constellation Eridanus, the River -- northeast of Zaurak, Gamma Eridani. It is visible in the night sky. Because Omicron1 Eridani was named "The Egg" (Al Baid, now Beid) by the Arabs for its position near the nest of the Ostrich (Theta Eridani 2, which is located much further south), Omicron2 Eridani nearby to the southeast was called "The Egg-shells" (or Al Kaid, now "Keid"). 

==40 Eridani A==
'''40 Eridani A''' is a main sequence, orange-red dwarf (K1 Ve) may have about 89 percent of Sol's mass<ref name="RECONS">RECONS</ref>, about 85 percent of its diameter<ref name="Johnson">Johnson and Wright, 1983, page 655</ref>, and 36 percent of its luminosity. The star appears to be 46 percent to 102 percent as enriched as Sol with elements heavier than hydrogen ("metallicity"), based on its abundance of iron<ref>Cayrel de Strobel et al, 1991, page 282</ref>. The system shows a radial velocity of about 25 miles per second (mps) -- about 40 km per second or kps -- in recession, but the true space velocity is about 62 mps (or 100 kps). Star A and the binary pair BC have a wide separation of about 418 AUs and an orbital period of some 8,000 years<ref>Wulff Dieter Heintz, 1974</ref>.

==40 Eridani B==
A white dwarf (DA4 /VII). It has a mass estimated from about 50.1 percent of Sol's<ref>Provencal et al, 1998</ref>, only two percent of its diameter, and 33/10,000th of its brightness. The B and C pair of stars have an "average" separation of about 35 AUs (of a semi-major axis) in a highly elliptical orbit (e= 0.410) that lasts about 252 years and swings between 21 and 49 AU<ref>Heintz, 1974</ref>.

==40 Eridani C==
A very dim red dwarf (M4.5 Ve) with only about 19.5 percent of Sol's mass<ref name="RECONS" />, 28 percent of its diameter<ref name="Johnson" />, and 7/10,000th of its luminosity. Star C is also a UV Ceti type flare star, which has the variable star designation of DY Eridani.

''(Boilerplate from [http://www.solstation.com/ SolStation.com])''

== Notes ==
<references />

{{interstellar}}