Beta Arae
Template:Location mark Location of β Arae (circled) | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Ara |
| Right ascension | Template:RA[1] |
| Declination | Template:DEC[1] |
| Apparent magnitude (V) | 2.84[2] |
| Characteristics | |
| Evolutionary stage | Red supergiant |
| Spectral type | K0/1Ib[3] |
| U−B Template:Engvar | +1.56[4] |
| B−V Template:Engvar | +1.46[4] |
| Astrometry | |
| Radial velocity (Rv) | Template:Val[5] km/s |
| Proper motion (μ) | RA: Template:Val mas/yr[6] Dec.: Template:Val mas/yr[6] |
| Parallax (π) | 4.5601±0.2077 mas[1] |
| Distance | Template:Val ly (Template:Val pc)[7] |
| Absolute magnitude (MV) | −3.494[8] |
| Details[9] | |
| Mass | Template:Val or 7.89±0.4 Template:Solar mass |
| Radius | Template:Val Template:Solar radius |
| Luminosity | Template:Val Template:Solar luminosity |
| Surface gravity (log g) | Template:Val cgs |
| Temperature | Template:Val K |
| Metallicity [Fe/H] | Template:Val dex |
| Rotational velocity (v sin i) | Template:Val[5] km/s |
| Age | Template:Val[10] Myr |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[11] | |
| Database references | |
| SIMBAD | data |
Script error: No such module "Check for unknown parameters".
Beta Arae is the brightest star in the constellation of Ara. This is a very luminous, relatively young red supergiant with an apparent visual magnitude of 2.84 and an absolute magnitude of −3.494.[2][8] Its name is a Bayer designation that is Latinized from β Arae, and abbreviated Beta Ara or β Ara. Based on a photogeometric estimation method, it is 710 light-years away,[7] a distance of which interstellar extinction in the line of sight reduces its apparent magnitude by 0.193 magnitudes.[9]
Characteristics
The spectrum of this star matches a stellar classification of K0/1 Ib,[3] with the luminosity class notation 'Ib' indicating that the star is a supergiant. It has an age estimated at 50 million years,[10] having spent much of its life as a B-type star.[12] Currently, it has expanded to 141 times the Sun's size and is 5,800 times more luminous.[9] Beta Arae is radiating energy from its outer envelope at an effective temperature of Template:Val, which causes it to take on the orange hue of a K-type star.[13] This enlarged star appears to be rotating slowly with a projected rotational velocity of about Template:Val.[5] The abundance of elements other than hydrogen and helium, its metallicity, is more than three times that of the Sun.[5]Template:Efn
Nomenclature
Beta Arae is the star's Bayer designation. Other designations include HD 157244 (from the Henry Draper Catalogue), HIP 85258 (from the Hipparcos catalogue) and HR 6461 (from the Bright Star Catalogue).[11]
Rarely, this star is called Vasat-ül-cemre a Turkisation of Arabic وسط الجمر (wasaṭ al-jamar), meaning "middle of the embers."[14] The constellation is named in Arabic المجمرة (al-mijmarah), meaning brazier/incense-burner.[15] In Chinese, Script error: No such module "Lang". (Script error: No such module "Lang".), meaning Pestle, refers to an asterism of β, σ and α Arae.[16] The Chinese name for β Arae is Script error: No such module "Lang". (Script error: No such module "Lang"., Template:Langx.)[17]
Notes
References
External links
Template:Stars of Ara Template:Portal bar
- ↑ a b c Cite error: Invalid
<ref>tag; no text was provided for refs namedGaiaDR3 - ↑ a b Cite error: Invalid
<ref>tag; no text was provided for refs namedscfs - ↑ a b Cite error: Invalid
<ref>tag; no text was provided for refs namedHouk1975 - ↑ a b Cite error: Invalid
<ref>tag; no text was provided for refs namedclpl4_99 - ↑ a b c d Cite error: Invalid
<ref>tag; no text was provided for refs namedaaa395_97 - ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedaaa474_2_653 - ↑ a b Cite error: Invalid
<ref>tag; no text was provided for refs namedb-j - ↑ a b Cite error: Invalid
<ref>tag; no text was provided for refs namedcasatella - ↑ a b c Cite error: Invalid
<ref>tag; no text was provided for refs namedSoubiran2024 - ↑ a b Cite error: Invalid
<ref>tag; no text was provided for refs namedmnras410_1_190 - ↑ a b Cite error: Invalid
<ref>tag; no text was provided for refs namedSIMBAD - ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedKaler - ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedcsiro - ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedtr - ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedara - ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedzh - ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedaeea