51 Pegasi
NASA
51 Pegasi is a yellow-orange star
like our Sun, Sol. (See a Digitized
Sky Survey image of 51 Pegasi
from the Nearby Stars Database.) ...
51 Pegasi b
External links
* Current Notes from the Extrasolar Planet Encyclopedia
* Extrasolar Visions: 51 Pegasi b
* Velocity curve and information from the Geneva based Planet Search Team ...
51 Pegasi
A Sun-like star around which has been discovered a planet, 51 Pegasi b, with about half the mass of Jupiter. With the exception of some pulsar planets, 51 Pegasi b was the first extrasolar planet to be found.
When 51 Pegasi b, the first extrasolar planet found around a fusing star, was discovered, many astronomers assumed it must be a gigantic terrestrial, as it was assumed no gas giant could exist as close to its star (0.052 AU) as 51 Pegasi b did.
[6328] 51 Pegasi is another notable star. It was the first star similar to the Sun discovered to have a planet in orbit. It is a yellow dwarf, approximately 50 light-years away. It has an apparent magnitude of 5.49 and can be seen in binoculars.
The star 51 pegasi is the first star similar to our sun to have confirmed extra-solar planets.
Pegasus constellation to constellation homepage
SBI! ...
[ The 5.5-magnitude 51 Pegasi is easily visible in binoculars between Alpha and Beta Pegasi, the western pair of stars in the Great Square of Pegasus. The star's equinox-2000 coordinates are R.A. 22 hours 57 minutes, Dec. +20 degrees 46 minutes. ] ...
The first confirmed discovery of an extrasolar planet orbiting an ordinary main-sequence star occurred on 6 October 1995, when Michel Mayor and Didier Queloz of the University of Geneva announced the detection of an exoplanet around 51 Pegasi.
Located in the constellation Pegasus, about 40 light-years from earth, the planet—called 51 Pegasi—has about half the mass of Jupiter and is so close to the star that it has a surface temperature of about 1,000°C; ...
The top graph shows the line-of-sight velocity of the star 51 Pegasi, a near-twin to our Sun lying some 40 light years away. These data were acquired in 1994 by Swiss astronomers using the 1.9-m telescope at Haute-Provence Observatory in France.
While observing the star 51 Pegasi, they noticed a change in the light from the star - its light repeatedly shifted back and forth between the blue and red ends of the electromagnetic spectrum.
For single planet systems, like 51 Pegasi, the first extra-solar planet to be discovered (1995), the variations in the Doppler-shifts in the star's light repeat as a simple sine-wave (see Figure 2 for the fit of the data for 51-Pegasi or; exoplanets.
It was discovered by noting a slight perturbation in the position of 51 Pegasi, a star in our nearby galactic neighborhood.
A planet was tentatively discovered orbiting 51 Pegasi by a wobble in the star's radial velocity, monitored by looking at 5000 lines in the visible spectrum. The wobble could be caused by a 4.
On Oct 6, 1995 the first extra-solar planet was found around 51 Pegasi - a similar star to the Sun, G2. The official announcement was made 19 days later in the International Astronomical Union Circular.
The first "true" extrasolar planet was announced on October 6, 1995 by Michael Mayor and Didier Queloz; the primary star was 51 Pegasi.
Its first catch came in 1995, when Swiss astronomers Michel Mayor and Didier Queloz discovered a planet orbiting the star 51 Pegasi. The planet, which is about half the mass of Jupiter, takes only 4.2 days to orbit the star.
Pegasus has two stars with orbiting planets: 51 Pegasi and HR 8799.
See a wide angle view of Pegasus with Cassiopeia, Andromeda, and Cepheus.
By Jim Kaler. Return to STARS.
PEGASUS
Pegasus (the flying horse) is a large northern hemisphere . Delta Pegasi is shared with the constellation . 51 Pegasi (51 Peg), off the Great Square of Pegasus, is a nearby, Sun-like star that has been found to have an orbiting planet.
Pegasus (the flying horse) is a large northern hemisphere constellation. Delta Pegasi is shared with the constellation Andromeda. 51 Pegasi (51 Peg), off the Great Square of Pegasus, is a nearby, ...
According to Queloz, who was part of the team that discovered the first hot jupiter exoplanet around 51 Pegasi in 1995, the new parameter of looking at the angles of exoplanet orbits has opened up a new dimension.
Exoplanets: The first planet discovered orbiting a sun-like star was in 1995 when two Swiss astronomers detected a Jupiter-mass planet around the star 51 Pegasi. This followed the discovery of a planet orbiting a pulsar the previous year.
 See also: Planet, Solar, Star, Orbit, Sun
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