HD 89307 b
Encyclopedia
HD 89307 b is an extrasolar planet
orbiting the star HD 89307
located approximately 108 light-year
s away in the constellation
of Leo
. The planet takes 187 megasecond
s to orbit (roughly 2164 days or 5.9 years). The planet’s minimum mass
is 1.92 MJ since the inclination
is unknown. As it is typical for most of the long-period planets, the eccentricity is greater than any planets in our solar system
, orbiting at the average distance of 491 gigameters. The speed of the wobble
caused by the planet’s gravity is 31 meters per second. The average orbital velocity
is 16.6 m/s.
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...
orbiting the star HD 89307
HD 89307
HD 89307 is a yellow main-sequence star located approximately 108 light-years away in the constellation of Leo. The apparent magnitude is 7.06. The mass of the star is identical in value to the Sun.- Planetary system :...
located approximately 108 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 Leo
Leo (constellation)
Leo is one of the constellations of the zodiac. Its name is Latin for lion. Its symbol is . Leo lies between dim Cancer to the west and Virgo to the east.-Stars:...
. The planet takes 187 megasecond
Megasecond
A megasecond is 1 million seconds, or roughly 11.6 days. There are roughly 31.5 megaseconds in a year. This page lists times between 1 and 1000 megaseconds , or 11.6 days and 31.7 years.*shorter times-1 year:...
s to orbit (roughly 2164 days or 5.9 years). The planet’s minimum mass
Minimum mass
In astronomy, minimum mass is the lower-bound calculated mass of observed objects such as planets, stars and binary systems, nebulae, and black holes. Minimum mass is a widely cited statistic for extrasolar planets...
is 1.92 MJ since the 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...
is unknown. As it is typical for most of the long-period planets, the eccentricity is greater than any planets in our solar system
Solar System
The Solar System consists of the Sun and the astronomical objects gravitationally bound in orbit around it, all of which formed from the collapse of a giant molecular cloud approximately 4.6 billion years ago. The vast majority of the system's mass is in the Sun...
, orbiting at the average distance of 491 gigameters. The speed of the wobble
Stellar wobble
Stellar wobble is a variation in the position of a star due to the gravitational influence of another body orbiting it. Stellar wobble is visible as a Doppler shift in the star's spectrum or as a motion of the star in the plane of the sky...
caused by the planet’s gravity is 31 meters per second. The average orbital velocity
Orbital velocity
Orbital velocity can refer to the following:* The orbital speed of a body in a gravitational field.* The velocity of particles due to wave motion, in particular in wind waves....
is 16.6 m/s.