HD 216770
Encyclopedia
HD 216770 is an 8th magnitude
star
located approximately 124 light-year
s away in the constellation
of Piscis Austrinus
. It is an orange dwarf
(spectral type K1 V), and is somewhat dimmer and cooler than our Sun
.
In 2003 a planet
was announced orbiting it by the Geneva Extrasolar Planet Search Team.
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...
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...
located approximately 124 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....
of Piscis Austrinus
Piscis Austrinus
Piscis Austrinus is a constellation in the southern celestial hemisphere. The name is Latin for "the southern fish" in contrast with the larger constellation Pisces, which represents a pair of fishes. Prior to the 20th century, it was also known as Piscis Notius...
. It is an orange dwarf
Main sequence
The main sequence is a continuous and distinctive band of stars that appears on plots of stellar color versus brightness. These color-magnitude plots are known as Hertzsprung–Russell diagrams after their co-developers, Ejnar Hertzsprung and Henry Norris Russell...
(spectral type K1 V), and is somewhat dimmer and cooler than our Sun
Sun
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...
.
In 2003 a planet
Planet
A planet is a celestial body orbiting a star or stellar remnant that is massive enough to be rounded by its own gravity, is not massive enough to cause thermonuclear fusion, and has cleared its neighbouring region of planetesimals.The term planet is ancient, with ties to history, science,...
was announced orbiting it by the Geneva Extrasolar Planet Search Team.
See also
- HD 10647HD 10647HD 10647, also known as q1 Eridani by the extended Bayer system, is a yellow-white dwarf star approximately 57 light-years away in the constellation of Eridanus . It is a relatively nearby 6th magnitude star. The star should be visible to the unaided eye under very dark skies, but with...
- HD 108874HD 108874HD 108874 is a yellow dwarf star in the constellation of Coma Berenices. It is 223 light years from Earth and has two extrasolar planets that are possibly in a 4:1 orbital resonance.- Star :...
- HD 111232HD 111232HD 111232 is a yellow main-sequence star in the constellation of Musca. It has magnitude 7.61 and has the distance of 95 light years away from Earth. It has mass 78% that of the Sun. Since 2003, it has been known to have a planet....
- HD 142415HD 142415HD 142415 is a 7th magnitude yellow main-sequence star 113 light years from Earth in the southern constellation Norma. This star dwarfs the Sun in terms of mass , size , luminosity , temperature , and metallicity . The age of the star is as young as 1.5 billion years.The star is currently known to...
- HD 169830HD 169830HD 169830 is a yellow-white dwarf star in the constellation of Sagittarius, 118.46 light years from our solar system. It is known to be orbited by two large Jupiter-like planets.- Star :...
- HD 41004HD 41004HD 41004 is a star system approximately 139 light years away in the constellation of Pictor.- HD 41004 A :HD 41004 A is a primary orange dwarf star of spectral type K1V and apparent magnitude 8.65.- Planetary system :...
- HD 65216HD 65216HD 65216 is an 8th magnitude G-type main sequence star located approximately away in the constellation of Carina. It is a Sun-like yellow dwarf, 8% less massive and somewhat less luminous. It cannot be seen without technical aid, but with binoculars or telescope it should be visible.- Planetary...
- List of extrasolar planets