HD 170469
Encyclopedia
HD 170469 is a yellow subgiant star
located approximately 212 light-year
s away in the constellation
Ophiuchus
. It has apparent magnitude
+8.21 and it is 211.91 ly away.
In April 2007, a planet
was discovered by the N2K Consortium
, led by principal investigators Debra Fischer
and Gregory P. Laughlin.
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 212 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....
Ophiuchus
Ophiuchus
Ophiuchus is a large constellation located around the celestial equator. Its name is from the Greek "serpent-bearer", and it is commonly represented as a man grasping the snake that is represented by the constellation Serpens. Ophiuchus was one of the 48 constellations listed by the 2nd-century...
. It has 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...
+8.21 and it is 211.91 ly away.
In April 2007, a planet
Extrasolar planet
An extrasolar planet, or exoplanet, is a planet outside the Solar System. A total of such planets have been identified as of . It is now known that a substantial fraction of stars have planets, including perhaps half of all Sun-like stars...
was discovered by the N2K Consortium
N2K Consortium
The N2K Consortium is a collaborative multinational effort by American, Chilean and Japanese astronomers to find additional extrasolar planets around stars that are...
, led by principal investigators Debra Fischer
Debra Fischer
Debra A. Fischer is a professor of astronomy at Yale University. Fischer has co-authored over 100 papers on dwarf and sub-stellar mass objects in the galactic neighborhood, including many on extrasolar planets. She is a principal investigator with the N2K Consortium searching for exoplanets...
and Gregory P. Laughlin.
See also
- HD 125612HD 125612- See also :* HD 170469* HD 231701* HD 17156* HD 11506* List of extrasolar planets...
- HD 231701HD 231701HD 231701 is a yellow-white dwarf star approximately 354 light years away in the constellation of Sagitta. It is a 9th magnitude star, meaning the star is not visible to the naked eye, but powerful binoculars or a small telescope is needed to view the star...
- HD 17156HD 17156HD 17156 is a yellow subgiant star approximately 255 light-years away in the constellation of Cassiopeia. The apparent magnitude is 8.17, which means it is not visible to the naked eye but can be seen with good binoculars. The Sun to star distance is 255.19 ly or 78.24 pc.The mass of the star is...
- HD 11506HD 11506HD 11506 is a yellow dwarf star in the constellation Cetus. It is 8th magnitude and about 175.5 ly away.- Planetary system :The superjovian planet HD 11506 b was discovered orbiting the star by the N2K Consortium using the doppler spectroscopy method.This planet was announced by Debra Fischer in...
- List of extrasolar planets