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
- Constellation
- Pegasus
- Child body
- 51 Pegasi b
- Distance from Earth
- 15.4614
- Diameter
- 1570000
- Radius
- 1.29
- Mass
- 1.06929608103
- Variable-star type
- rotating variable star
- Image
- Pegasus 51 location inv.png
Show 20 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
- epoch
- J2000.0
- 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
via Wikidata · CC0
~5 min read
Encyclopedic overview
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
Excerpted from Wikipedia’s “51 Pegasi” article, available under the CC BY-SA 4.0 licence.