45 Aquilae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquila[1] |
| Right ascension | Template:RA[2] |
| Declination | Template:DEC[2] |
| Apparent magnitude (V) | 5.656[3] (5.9 + 7.6)[4] |
| Characteristics | |
| Spectral type | A3 IV[5] |
| U−B Template:Engvar | +0.09[3] |
| B−V Template:Engvar | +0.11[3] |
| Astrometry | |
| Radial velocity (Rv) | −46[6] km/s |
| Proper motion (μ) | RA: +15.683[2] mas/yr Dec.: +5.323[2] mas/yr |
| Parallax (π) | 9.3151±0.1561 mas[2] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | 0.49[1] |
| Orbit[7] | |
| Primary | 5 Aql Aa |
| Companion | 5 Aql Ab |
| Period (P) | Script error: No such module "val". yr |
| Semi-major axis (a) | Script error: No such module "val".″ |
| Eccentricity (e) | Script error: No such module "val". |
| Inclination (i) | Script error: No such module "val".° |
| Longitude of the node (Ω) | Script error: No such module "val".° |
| Periastron epoch (T) | Script error: No such module "val". |
| Argument of periastron (ω) (secondary) | Script error: No such module "val".° |
| Details | |
| 45 Aql Aa | |
| Mass | Script error: No such module "val".[8] Template:Solar mass |
| Luminosity | Script error: No such module "val".[8] Template:Solar luminosity |
| Temperature | Script error: No such module "val".[8] K |
| Rotational velocity (v sin i) | 75[8] km/s |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[9] | |
| Database references | |
| SIMBAD | data |
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45 Aquilae, abbreviated 45 Aql, is a triple star system in the equatorial constellation of Aquila. 45 Aquilae is its Flamsteed designation. It is located Script error: No such module "convert". away from Earth, give or take a 6 light-year margin of error, and has a combined apparent visual magnitude of 5.7.[3] The system is moving closer to the Earth with a heliocentric radial velocity of -46 km/s.[6]
Based upon a stellar classification of A3 IV,[5] the primary component of this system is a subgiant star that is in the process of evolving away from the main sequence. The star has 2.6[8] times the mass of the Sun and is spinning with a projected rotational velocity of 75 km/s.[8] It has an orbiting companion with a period of 20.31 years and an eccentricity of 0.054. At an angular separation of 42.2 arcseconds from this pair is a 12.7 magnitude tertiary companion.[10]
References
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