HD 73526
Encyclopedia
HD 73526 is a yellow dwarf
star
(G6V) about 323 light-year
s away in the constellation
Vela
.
. This star is 22% older than our Sun and with metallicity
nearly doubled with the Sun, based on its abundance of iron
.
planet HD 73526 b
was discovered orbiting its star in an orbit just a little smaller than that of Venus
' orbit around the Sun. This planet receives insolation 3.65 times that of Earth or 1.89 times that of Venus. This single planetary system was known for four years until 2006 when 2.3 MJ second planet HD 73526 c
was found. This planet forms 2:1 orbital resonance
with the planet b. Although those masses are minimal as inclination
s of these planets are not known.
Yellow dwarf
A G-type main-sequence star , often called a yellow dwarf, is a main-sequence star of spectral type G and luminosity class V. Such a star has about 0.8 to 1.2 solar masses and surface temperature of between 5,300 and 6,000 K., Tables VII, VIII...
star
Star
A star is a massive, luminous sphere of plasma held together by gravity. At the end of its lifetime, a star can also contain a proportion of degenerate matter. The nearest star to Earth is the Sun, which is the source of most of the energy on Earth...
(G6V) about 323 light-year
Light-year
A light-year, also light year or lightyear is a unit of length, equal to just under 10 trillion kilometres...
s away 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:...
.
Star
The star is cooler, more luminous, similar mass, and larger than our SunSun
The Sun is the star at the center of the Solar System. It is almost perfectly spherical and consists of hot plasma interwoven with magnetic fields...
. This star is 22% older than our Sun and with metallicity
Metallicity
In astronomy and physical cosmology, the metallicity of an object is the proportion of its matter made up of chemical elements other than hydrogen and helium...
nearly doubled with the Sun, based on its abundance of iron
Iron
Iron is a chemical element with the symbol Fe and atomic number 26. It is a metal in the first transition series. It is the most common element forming the planet Earth as a whole, forming much of Earth's outer and inner core. It is the fourth most common element in the Earth's crust...
.
Planetary system
In 2002, a 2.1 MJJupiter mass
Jupiter mass , is the unit of mass equal to the total mass of the planet Jupiter . Jupiter mass is used to describe masses of the gas giants, such as the outer planets and extrasolar planets. It is also used in describing brown dwarfs....
planet HD 73526 b
HD 73526 b
HD 73526 b is an extrasolar planet orbiting about 61 million miles away from its parent star. This planet is more massive than Jupiter in our solar system, so is most likely a gas giant. Based on its orbit and the stellar luminosity, the planet probably receives insolation 61% that of Mercury....
was discovered orbiting its star in an orbit just a little smaller than that of Venus
Venus
Venus is the second planet from the Sun, orbiting it every 224.7 Earth days. The planet is named after Venus, the Roman goddess of love and beauty. After the Moon, it is the brightest natural object in the night sky, reaching an apparent magnitude of −4.6, bright enough to cast shadows...
' orbit around the Sun. This planet receives insolation 3.65 times that of Earth or 1.89 times that of Venus. This single planetary system was known for four years until 2006 when 2.3 MJ second planet HD 73526 c
HD 73526 c
HD 73526 c is an extrasolar planet orbiting about 97 million miles away from its parent star. Based on its mass, this planet is likely to be a gas giant. At the distance this planet orbits from its star, which is more luminous than our Sun, HD 73526 c would receive insolation 84% that of Venus.HD...
was found. This planet forms 2:1 orbital resonance
Orbital resonance
In celestial mechanics, an orbital resonance occurs when two orbiting bodies exert a regular, periodic gravitational influence on each other, usually due to their orbital periods being related by a ratio of two small integers. Orbital resonances greatly enhance the mutual gravitational influence of...
with the planet b. Although those masses are minimal as inclination
Inclination
Inclination in general is the angle between a reference plane and another plane or axis of direction.-Orbits:The inclination is one of the six orbital parameters describing the shape and orientation of a celestial orbit...
s of these planets are not known.
External links
- Extrasolar Planet Interactions by Rory Barnes & Richard Greenberg, Lunar and Planetary Lab, University of Arizona