Upsilon Aquilae
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Template:Location mark Location of υ Aquilae (circled) | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquila[1] |
| Right ascension | Template:RA[2] |
| Declination | Template:DEC[2] |
| Apparent magnitude (V) | +5.889[3] |
| Characteristics | |
| Spectral type | A3 IV[4] |
| U−B Template:Engvar | +0.09[5] |
| B−V Template:Engvar | +0.18[5] |
| Astrometry | |
| Radial velocity (Rv) | Script error: No such module "val".[6] km/s |
| Proper motion (μ) | RA: +53.593 mas/yr[2] Dec.: −0.223 mas/yr[2] |
| Parallax (π) | 18.884±0.0408 mas[2] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | +2.24[1] |
| Details | |
| Mass | 1.68[7] Template:Solar mass |
| Luminosity | 10.5[1] Template:Solar luminosity |
| Surface gravity (log g) | 4.21[3] cgs |
| Temperature | 7,906[3] K |
| Metallicity [Fe/H] | −0.05[3] dex |
| Rotational velocity (v sin i) | 22.5[7] km/s |
| Age | 361±308[7] Myr |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[8] | |
| Database references | |
| SIMBAD | data |
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Upsilon Aquilae is a star in the equatorial constellation of Aquila. Its name is a Bayer designation that is Latinized from υ Aquilae, and abbreviated Upsilon Aql or υ Aql. With an apparent visual magnitude of +5.91[5] it is a faint star but, according to the Bortle Dark-Sky Scale, it is visible to the naked eye from suburban skies. It has an annual parallax shift of Script error: No such module "val".,[9] indicating a distance of Script error: No such module "convert".. The star is drifting closer with a radial velocity of −30 km/s.[6]
This is a subgiant star with a stellar classification of A3 IV.[4] The outer atmosphere is radiating energy into space with 10.5[1] times the Sun's luminosity from its photosphere at an effective temperature of 7,906 K,[3] which gives it the white-hot glow of an A-type star. It is 361 million years old with 1.68 times the mass of the Sun and has a relatively high rate of spin with a projected rotational velocity of 22.5 km/s. An infrared excess has been reported, although no circumstellar disk has been resolved.[7]
References
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- ↑ a b c d Script error: No such module "citation/CS1".
- ↑ a b c d Template:Cite Gaia DR3
- ↑ a b c d e Script error: No such module "citation/CS1".
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- ↑ a b Script error: No such module "citation/CS1".
- ↑ a b c d Script error: No such module "citation/CS1".
- ↑ Template:Cite simbad
- ↑ Template:Cite Gaia DR2
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