Please Read

If you'd like an account, please email accounts at this domain name  to ask for one. Include your email address and an explanation of why you want an account.

this is just a formality, to weed out spammers.

Navigation
User login

PostHeaderIcon12 Ophiuchi

Primary of Mataora.

Spectral Class K2.

This star is categorized as a BY Draconis variable, with variable star designation V2133. The variability is attributed to large-scale magnetic activity on the chromosphere (in the form of starspots) combined with a rotational period that moved the active regions into (and out of) the line of sight. This results in low amplitude variability of 12 Ophiuchi's luminosity. The star also appears to display rapid variation in luminosity, possibly due to changes in the starspots. Measurements of the long-term variability show two overlapping cycles of starspot activity (compared to the Sun's single, 11-year cycle.) The periods of these two cycles are 4.0 and 17.4 years.

Its abundance of heavy elements (elements heavier than helium) is nearly identical to that of the Sun. The surface gravity is equal to , which is somewhat higher than the Sun's. The space velocity is 30 km/s relative to the solar system. The high rotation period and active chromosphere are indicative of a relatively young star.
 

Have you read?
The Book That Predicted Google Glass
The final battle of the Empress
Clone paranormal geniuses against the galactic empire
Two Tales of the Scattered Worlds
Visit a world in which scent and taste are as important as vision and hearing
Opening a new chapter in the Scattered Worlds Mosaic
How would intelligent, long-lived trees judge the Human race?
Classic gay teenage romance
The Fey vs the Galactic Empire
A Datebook Like No Other
Carmen Miranda's Ghost is Haunting Space Station Three
Lucky's Life is Turning Around
An anthology in celebration of queer speculative fiction.
An anthology celebrating queer speculative fiction.
The PsiScouts: X-Men meet Buck Rogers
collection of sf & fantasy stories, essay, and poetry by Maryland-area writers
A Scattered Worlds Omnibus
a Scattered Worlds omnibus
Psi-gifted teens tackle theocracy & a threat to history itself
A collection of sf/fantasy diversions
Search
Eras