Zeta Aquilae
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| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Aquila |
| Right ascension | 19h 05m 24.6082s |
| Declination | +13° 51′ 48.521″ |
| Apparent magnitude (V) | 2.988 |
| Characteristics | |
| Spectral type | A0Vn |
| U-B color index | -0.01 |
| B-V color index | 0.01 |
| Astrometry | |
| Radial velocity (Rv) | -25 km/s |
| Proper motion (μ) | RA: -7.04 mas/yr Dec.: -95.31 mas/yr |
| Parallax (π) | 39.18 ± 0.72 mas |
| Distance | 83 ± 2 ly (25.5 ± 0.5 pc) |
| Absolute magnitude (MV) | 0.96 |
| Details | |
| Mass | 2.4 M☉ |
| Radius | 2.2 R☉ |
| Luminosity | 40 L☉ |
| Temperature | 10,000 K |
| Metallicity | ? |
| Rotation | 331 km/s (uncertain) (variable) 0,0088058738 Year |
| Age | ? years |
| Orbit | |
| Companion | ζ Aquilae B |
| Semimajor axis (a) | 6.5" |
| Inclination (i) | 60° |
| Orbit | |
| Companion | ζ Aquilae C |
| Semimajor axis (a) | 160.8" |
| Orbit | |
| Companion | ζ Aquilae D |
| Semimajor axis (a) | 202.3" |
| Inclination (i) | 151° |
| Other designations | |
|
Deneb el Okab, GC 26270, HR 7235, SAO 104461, * 17 Aql, GCRV 11547, IDS 19008+1343 A, ADS 12026 A, IRC +10404, SRS 30716, AG+13° 1887, GJ 4095, JP11 3072, TD1 23865, BD+13° 3899, GSC 01052-03027, N30 4228, TYC 1052-3027-1, CCDM J19055+1352A, HD 177724, PLX 4436, UBV M 23478, CSI+13° 3899 1, HGAM 730, PMC 90-93 509, UBV 16191, EUVE J1905+13.8, HIC 93747, PPM 135773, uvby98 100177724 AB, FK5 716, HIP 93747, ROT 2719.
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| Database references | |
| SIMBAD | data |
| Database references | |
| SIMBAD | data |
| Data sources: | |
| Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) |
|
Zeta Aquilae (ζ Aql / ζ Aquilae) is a triple star system in the constellation Aquila. It has the traditional names Deneb el Okab, from an Arabic term ذنب العقاب ðanab al-cuqāb meaning "the tail of the falcon", and the Mandarin names Woo and Yuë, derived from 吳 wú, an old state near Jiangsu province, and 粵 yuè, an old state in Guandong province. It shares these names with ε Aquilae.
The primary component, ζ Aquilae A, is a white A-type main sequence dwarf with an apparent magnitude of +2.99. It has two 12th magnitude companions at 6.5 and 158.6 arcseconds from the primary. Zeta Aquilae is approximately 83.2 light years from Earth.
The system is depicted in the computer game Descent II.
[edit] Location
[edit] References
[edit] Components
| NAME | Right ascension | Declination | Apparent magnitude (V) | Database references |
|---|---|---|---|---|
| ζ Aquilae B (BD+13 3899B) | 01h 09m 42.2s | +35° 36' 54 | 14.4 | Simbad |
| ζ Aquilae C (BD+13 3899C) | 01h 09m 35.334s | +35° 36' 24.4 | 12.9 | Simbad |
| ζ Aquilae D | Simbad |
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