Gamma Camelopardalis,
Latinized from γ Camelopardalis, is a suspected wide
binary star
A binary star is a system of two stars that are gravitationally bound to and in orbit around each other. Binary stars in the night sky that are seen as a single object to the naked eye are often resolved using a telescope as separate stars, in wh ...
[ system in the northern circumpolar constellation of ]Camelopardalis
Camelopardalis is a large but faint constellation of the northern sky representing a giraffe. The constellation was introduced in 1612 or 1613 by Petrus Plancius. Some older astronomy books give Camelopardalus or Camelopardus as alternative for ...
. With a visual magnitude of 4.66,[ it is faintly visible to the naked eye. Based upon an annual parallax shift of 9.09 ]mas
Mas, Más or MAS may refer to:
Film and TV
* Más y Menos, fictional superhero characters, from the Teen Titans animated television series
* Más (Breaking Bad), "Más" (''Breaking Bad''), a season three episode of ''Breaking Bad''
Songs
* Más ( ...
as seen from Earth,[ this star is located about 359 ]light year
A light-year, alternatively spelled light year, is a large unit of length used to express astronomical distances and is equivalent to about 9.46 trillion kilometers (), or 5.88 trillion miles ().One trillion here is taken to be 1012 ...
s from the Sun.
The brighter primary, designated component A, is a white-hued A-type subgiant star with a stellar classification
In astronomy, stellar classification is the classification of stars based on their stellar spectrum, spectral characteristics. Electromagnetic radiation from the star is analyzed by splitting it with a Prism (optics), prism or diffraction grati ...
of A2 IVn.[ It is spinning rapidly with a ]projected rotational velocity
Stellar rotation is the angular motion of a star about its axis. The rate of rotation can be measured from the spectrum of the star, or by timing the movements of active features on the surface.
The rotation of a star produces an equatorial bulge ...
of 205 km/s. This is giving the star an oblate shape with an equatorial bulge that is 17% larger than the polar radius.[ It has about three][ times the ]mass of the Sun
The solar mass () is a standard unit of mass in astronomy, equal to approximately . It is often used to indicate the masses of other stars, as well as stellar clusters, nebulae, galaxies and black holes. It is approximately equal to the mass ...
and 2.5[ times the Sun's radius. The star is radiating 185][ times the Sun's luminosity from its ]photosphere
The photosphere is a star's outer shell from which light is radiated.
The term itself is derived from Ancient Greek roots, φῶς, φωτός/''phos, photos'' meaning "light" and σφαῖρα/''sphaira'' meaning "sphere", in reference to it ...
at an effective temperature
The effective temperature of a body such as a star or planet is the temperature of a black body that would emit the same total amount of electromagnetic radiation. Effective temperature is often used as an estimate of a body's surface temperature ...
of 8,892 K.[
The magnitude 9.07 secondary, BD+70 260, designated component C, lies at an ]angular separation
Angular distance \theta (also known as angular separation, apparent distance, or apparent separation) is the angle between the two sightlines, or between two point objects as viewed from an observer.
Angular distance appears in mathematics (in pa ...
of 106.00 arc seconds along a position angle of 85°, as of 2011. Component B is a magnitude 12.40 visual companion
In observational astronomy, a double star or visual double is a pair of stars that appear close to each other as viewed from Earth, especially with the aid of optical telescopes.
This occurs because the pair either forms a binary star (i.e. a bi ...
at a separation of 56.30 arc seconds along position angle 247°.[
]
References
External links
HR 1148
Image Gamma Camelopardalis
{{DEFAULTSORT:Gamma Camelopardalis
A-type subgiants
Double stars
Camelopardalis, Gamma
Camelopardalis
BD+70 0259
023401
017959
1148
Year 1148 ( MCXLVIII) was a leap year starting on Thursday (link will display the full calendar) of the Julian calendar.
Events
By place
Second Crusade
* January 1 – The French crusaders under King Louis VII defeat a Turkish am ...