Nu Aquarii
Template:Location mark Location of ν Aquarii (circled) | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquarius |
| Right ascension | Template:RA[1] |
| Declination | Template:DEC[1] |
| Apparent magnitude (V) | 4.520[2] |
| Characteristics | |
| Spectral type | G8 III[3] |
| U−B Template:Engvar | +0.66[4] |
| B−V Template:Engvar | +0.943[5] |
| Astrometry | |
| Radial velocity (Rv) | −11.23[5] km/s |
| Proper motion (μ) | RA: +93.613 mas/yr[1] Dec.: −15.494 mas/yr[1] |
| Parallax (π) | 20.0842±0.1137 mas[1] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | +0.93[6] |
| Details | |
| Mass | 2.35[6] Template:Solar mass |
| Radius | 8[5] Template:Solar radius |
| Luminosity | 37[5] Template:Solar luminosity |
| Surface gravity (log g) | 2.88±0.09[2] cgs |
| Temperature | 4,920±5[5] K |
| Metallicity [Fe/H] | −0.06±0.04[2] dex |
| Rotational velocity (v sin i) | 2.8±0.3[7] km/s |
| Age | 708[6] Myr |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[8] | |
| Database references | |
| SIMBAD | data |
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Nu Aquarii is a star in the equatorial constellation of Aquarius. The name is a Bayer designation that is Latinized from ν Aquarii, and abbreviated Nu Aqr or ν Aqr. With an apparent visual magnitude of 4.52,[4] Nu Aquarii is faintly visible to the naked eye. Its distance from Earth, as determined from parallax measurements, is Script error: No such module "convert".. The star is drifting closer to the Sun with a radial velocity of −11 km/s.[5]
At an estimated age of 708 million years,[6] Nu Aquarii has exhausted the supply of hydrogen at its core and evolved into a giant star with a spectrum that matches a stellar classification of G8 III.[3] It has double the mass of the Sun[6] and has expanded to eight[5] times the Sun's radius. Nu Aquarii is radiating 37 times[5] the luminosity of the Sun from its photosphere at an effective temperature of Script error: No such module "val"..[5] At this heat, the star is glowing with the yellowish hue of a G-type star.[9]
Together with μ Aquarii, it is Albulaan Template:IPAc-en, a name derived from the Arabic term al-bulaʽān (ألبولعان), meaning "the two swallowers". This star, along with ε Aqr (Albali) and μ Aqr (Albulaan), were al Bulaʽ (البلع)—the Swallower.[10][11]
In Chinese, Script error: No such module "Lang". (Script error: No such module "Lang".), meaning Celestial Ramparts, refers to an asterism consisting of ν Aquarii, ξ Aquarii, 46 Capricorni, 47 Capricorni, λ Capricorni, 50 Capricorni, 18 Aquarii, 29 Capricorni, 9 Aquarii, 8 Aquarii, 14 Aquarii, 17 Aquarii and 19 Aquarii.[12] Consequently, the Chinese name for ν Aquarii itself is Script error: No such module "Lang". (Script error: No such module "Lang"., Template:Langx).[13]
References
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- ↑ a b c d Template:Cite Gaia DR3
- ↑ a b c Script error: No such module "citation/CS1".
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- ↑ a b c d e Script error: No such module "citation/CS1".
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- ↑ Template:Cite simbad
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ Template:In lang 中國星座神話, written by 陳久金. Published by 台灣書房出版有限公司, 2005, Template:ISBN.
- ↑ Template:In lang AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 5 月 15 日 Template:Webarchive
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