Kappa Velorum
Encyclopedia
Kappa Velorum is a binary star
in the constellation
Vela
. It also has the traditional name Markab
, often spelled Markeb
to distinguish it from similarly named stars such as Alpha Pegasi
.
Kappa Velorum is spectroscopic binary which is classified as a blue-white B-type
subgiant with an apparent magnitude
of +2.47. It is approximately 539 light years
from Earth
. The two components complete one orbit every 116.65 days.
The star is only a couple of degrees from the south celestial pole of Mars
, so it could therefore be considered the southern polar star of Mars
. Due to precession of the equinoxes
, it will be the closest bright star of note to the south celestial pole of Earth in the period surrounding 9000 AD.
Binary star
A binary star is a star system consisting of two stars orbiting around their common center of mass. The brighter star is called the primary and the other is its companion star, comes, or secondary...
in the constellation
Constellation
In modern astronomy, a constellation is an internationally defined area of the celestial sphere. These areas are grouped around asterisms, patterns formed by prominent stars within apparent proximity to one another on Earth's night sky....
Vela
Vela (constellation)
Vela is a constellation in the southern sky. Its name is Latin for the sails of a ship, and it was originally part of a larger constellation, the ship Argo Navis, which was later divided into three parts, the others being Carina and Puppis.-Stars:...
. It also has the traditional name Markab
Markab
Markab can refer to*the following stars Markab can refer to*the following stars Markab can refer to*the following stars (the name derives from Arabic مركب, markab meaning "something to ride" [or "vehicle", "saddle", "boat", etc...
, often spelled Markeb
Markeb
Markeb is a variant form of Markab the proper name for some stars.* k Puppis, in the constellation Puppis, was former Kappa Argus lettered by Bayer....
to distinguish it from similarly named stars such as Alpha Pegasi
Alpha Pegasi
Alpha Pegasi is the third brightest star in the constellation Pegasus and one of the four stars in the asterism known as the Great Square of Pegasus. It has the traditional name Markab .Markab is a relatively average star nearing the end of its stellar evolution on the main sequence...
.
Kappa Velorum is spectroscopic binary which is classified as a blue-white B-type
Stellar classification
In astronomy, stellar classification is a classification of stars based on their spectral characteristics. The spectral class of a star is a designated class of a star describing the ionization of its chromosphere, what atomic excitations are most prominent in the light, giving an objective measure...
subgiant with an apparent magnitude
Apparent magnitude
The apparent magnitude of a celestial body is a measure of its brightness as seen by an observer on Earth, adjusted to the value it would have in the absence of the atmosphere...
of +2.47. It is approximately 539 light years
Light Years
Light Years is the seventh studio album by Australian recording artist Kylie Minogue. It was released on 25 September 2000 by Parlophone and Mushroom Records. The album's style was indicative of her return to "mainstream pop dance tunes"....
from Earth
Earth
Earth is the third planet from the Sun, and the densest and fifth-largest of the eight planets in the Solar System. It is also the largest of the Solar System's four terrestrial planets...
. The two components complete one orbit every 116.65 days.
The star is only a couple of degrees from the south celestial pole of Mars
Mars
Mars is the fourth planet from the Sun in the Solar System. The planet is named after the Roman god of war, Mars. It is often described as the "Red Planet", as the iron oxide prevalent on its surface gives it a reddish appearance...
, so it could therefore be considered the southern polar star of Mars
Mars
Mars is the fourth planet from the Sun in the Solar System. The planet is named after the Roman god of war, Mars. It is often described as the "Red Planet", as the iron oxide prevalent on its surface gives it a reddish appearance...
. Due to precession of the equinoxes
Precession of the equinoxes
In astronomy, axial precession is a gravity-induced, slow and continuous change in the orientation of an astronomical body's rotational axis. In particular, it refers to the gradual shift in the orientation of Earth's axis of rotation, which, like a wobbling top, traces out a pair of cones joined...
, it will be the closest bright star of note to the south celestial pole of Earth in the period surrounding 9000 AD.