HD 4391
Encyclopedia
HD 4391 is a star in the constellation
Phoenix
that is located at a distance of 48.7 light years from the Sun
. It has a stellar classification
of G3V, which is a
G-type main sequence star. The physical properties of this star are similar to the Sun, making it a solar analog
. However, it is believed to have 22% greater mass than the Sun and is only 1.2 billion years old. The spectrum for this star displays an abnormally low level of beryllium, which may be caused by some type of mixing process.
Presently, no planet has been detected in orbit around this star. Nor does it emit a statistically significant excess of infrared radiation that might indicate a debris disk
. However, it has two optical companions, at least one of which may share a common proper motion through space with HD 4391.
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....
Phoenix
Phoenix (constellation)
Phoenix is a minor constellation in the southern sky. It is named after the Phoenix, a mythical bird. It is faint: there are only two stars in the whole constellation which are brighter than magnitude 5.0...
that is located at a distance of 48.7 light years from the 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...
. It has a stellar classification
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...
of G3V, which is a
G-type main sequence star. The physical properties of this star are similar to the Sun, making it a solar analog
Solar analog
Solar-type, solar analog, and solar twin stars are those stars that are particularly similar to the Sun. The classification is a hierarchy with solar twin being most like the Sun followed by solar analog and then solar-type...
. However, it is believed to have 22% greater mass than the Sun and is only 1.2 billion years old. The spectrum for this star displays an abnormally low level of beryllium, which may be caused by some type of mixing process.
Presently, no planet has been detected in orbit around this star. Nor does it emit a statistically significant excess of infrared radiation that might indicate a debris disk
Debris disk
A debris disk is a circumstellar disk of dust and debris in orbit around a star. Sometimes these disks contain prominent rings, as seen in the image of Fomalhaut on the right. Debris disks have been found around both evolved and young stars, as well as at least one debris disk in orbit around a...
. However, it has two optical companions, at least one of which may share a common proper motion through space with HD 4391.