51 Pegasi

Also known as Helvetios

star in the constellation Pegasus

Astronomical data · SIMBAD

Object type: PM*
Spectral type: G2IV
Distance: 51 light-years
Redshift: z = -0.00011062041373444131
Coordinates: RA 344.3666° · Dec 20.7688°

View on SIMBAD →

via SIMBAD · CDS Strasbourg

Key facts

Constellation: Pegasus
Right ascension: 22 57 27.9805
Declination: +20 ° 46 ′ 07.797 ″
Evolutionary stage: main sequence
Spectral type: G2V+
U b color index: +0.20
B v color index: +0.67

via Wikipedia infobox

Wikidata facts

Distance from Earth: 15.4614
Diameter: 1570000
Radius: 1.29
Mass: 1.06929608103
Image: Pegasus 51 location inv.png

Show 19 more facts

metallicity: 0.18
catalog code: WDS J22575+2046A
absolute magnitude: 4.524
Commons category: 51 Pegasi
spectral class: G2IV-V
apparent magnitude: 5.283212
luminosity: 1.4028223
radial velocity: -33.165
effective temperature: 5773
parallax: 64.4048
angular diameter: 0.677
stellar rotational velocity: 2.47
surface gravity: 23000
name: Helvetios
right ascension component of proper motion: 200
declination component of proper motion: 59
right ascension: 344.36658535524
declination: 20.76883251114
age estimated by a dating method: 10

Sources (4)

via Wikidata · CC0

~5 min read

Article

51 Pegasi, also named Helvetios (/hɛlˈviːʃiəs/), is a Sun-like star located 50.6 light-years (15.5 parsecs) from Earth in the constellation of Pegasus. It was the first main-sequence star found to have an exoplanet (designated 51 Pegasi b, officially named Dimidium) orbiting it.

Properties