Betelgeuse
(Alpha Orionis)
(second brightest star in constellation Orion)
Betelgeuse is the bright star representing the
constellation Orion's right shoulder,
assuming Orion pictures a man who is facing us.
Betelgeuse is a red supergiant with spectral type M2Iab
and is among the larger and more luminous stars known.
Characteristics:
Betelgeuse is near the end of the short lifetime of a massive star
and is thought likely to supernova within the next 100,000 years.
Astronomers occasionally casually/humorously refer to the possibility
that it will supernova any time now, but its state of evolution is not
so precisely known as to make that likely.
It generally shows somewhat periodic variation (on the order of a
magnitude) but a longer and deeper reduction in brightness
from November 2019 to March 2020 (the Great Dimming) produced
speculation regarding its current state.
(star,bright star,variable star,giant star)
Further reading:
https://en.wikipedia.org/wiki/Betelgeuse
http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Betelgeuse
https://www.aavso.org/vsots_alphaori
http://spider.seds.org/spider/Vars/alphaOri.html
https://ui.adsabs.harvard.edu/abs/2022ApJ...936...18D/abstract
Redshift | Parsecs /Distance | Lightyears /Lookback Years | | |
~0 | 168pc | 548ly | | Betelgeuse |
|
Coordinates: | Betelgeuse J055510.30536+072425.4304 |
|
Referenced by pages:
Bayer designation
M-type star (M)
near-Earth supernova
Orion
red giant
right ascension (RA)
solar luminosity (LSun)
stellar designation
supergiant
Index