HD 221287 b
Encyclopedia
HD 221287 b is an exoplanet approximately 173 light years away in the constellation
of Tucana
. This planet has mass
>3.12 MJ (>992 M⊕) and orbits at 1.25 AUs
or 6.06 μpc from the star, taking 1.25 years to orbit at 29.9 km/s around the star. Naef discovered this planet in early 2007 by using HARPS spectrograph
located in Chile
.
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 Tucana
Tucana
Tucana is a constellation in the southern sky, created in the late sixteenth century. Its name is Latin for the toucan, a South American bird.-History:...
. This planet has mass
Mass
Mass can be defined as a quantitive measure of the resistance an object has to change in its velocity.In physics, mass commonly refers to any of the following three properties of matter, which have been shown experimentally to be equivalent:...
>3.12 MJ (>992 M⊕) and orbits at 1.25 AUs
Astronomical unit
An astronomical unit is a unit of length equal to about or approximately the mean Earth–Sun distance....
or 6.06 μpc from the star, taking 1.25 years to orbit at 29.9 km/s around the star. Naef discovered this planet in early 2007 by using HARPS spectrograph
Spectrograph
A spectrograph is an instrument that separates an incoming wave into a frequency spectrum. There are several kinds of machines referred to as spectrographs, depending on the precise nature of the waves...
located in Chile
Chile
Chile ,officially the Republic of Chile , is a country in South America occupying a long, narrow coastal strip between the Andes mountains to the east and the Pacific Ocean to the west. It borders Peru to the north, Bolivia to the northeast, Argentina to the east, and the Drake Passage in the far...
.