Alpha Arietis
Sign in to saveAlso known as Hamal, α Arietis, α Ari, 13 Ari, 13 Arietis, LTT 10711, GJ 84.3, GJ 9072
Hamal, , is a star in the northern zodiacal constellation of Aries. It has the Bayer designation Alpha Arietis, which is Latinized from α Arietis and abbreviated Alpha Ari or α Ari. This star is visible to the naked eye with an apparent visual magnitude of 2.0. Hamal is the brightest star in the constellation and, on average, the 50th-brightest star in the night sky. Based upon parallax measurements made with the Hipparcos astrometry satellite, Hamal is about from Earth. It is drifting closer to the Sun with a radial velocity of −14 km/s.
In the Vinony graph
Vinony's link graph records 154 inbound references to Alpha Arietis, and connects out to stellar classification, star catalogue and list of stars in Aries.
It is catalogued under topics including Aries (constellation), Bayer objects and Brightest stars.
Vinony links it to 34 Wikipedia language editions.
Wikidata facts
- Instance of
- orange giant
- Constellation
- Aries
- Distance from Earth
- 20.2
- Radius
- 13.9
- Mass
- 1.5
Show 14 more facts
- catalog code
- [B10] 447
- spectral class
- K2 IIIab
- metallicity
- -0.19
- radial velocity
- -14.412
- apparent magnitude
- -0.63
- stellar rotational velocity
- 0.50
- effective temperature
- 4537
- surface gravity
- 700
- right ascension
- 31.793357100
- declination
- 23.462417550
- parallax
- 49.48
- epoch
- J2000.0
- right ascension component of proper motion
- 192
- declination component of proper motion
- -146
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Encyclopedic overview
8 sectionsContents
- Nomenclature
- Properties
- Planetary system
- In culture
- See also
- Notes
- References
- External links
Hamal, , is a star in the northern zodiacal constellation of Aries. It has the Bayer designation Alpha Arietis, which is Latinized from α Arietis and abbreviated Alpha Ari or α Ari. This star is visible to the naked eye with an apparent visual magnitude of 2.0. Hamal is the brightest star in the constellation and, on average, the 50th-brightest star in the night sky. Based upon parallax measurements made with the Hipparcos astrometry satellite, Hamal is about from Earth. It is drifting closer to the Sun with a radial velocity of −14 km/s.
This is an aging giant star that is likely to host an orbiting planet with a mass greater than Jupiter.
Excerpted from Wikipedia’s “Alpha Arietis” article, available under the CC BY-SA 4.0 licence.