Theta Aquilae
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 Aquila Constellation |
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| Observation data Epoch J2000 Equinox J2000 |
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|---|---|
| Constellation | Aquila |
| Right ascension | 20h 11m 18.2855s |
| Declination | -00° 49′ 17.26″ |
| Apparent magnitude (V) | 3.242 |
| Characteristics | |
| Spectral type | B9.5III |
| U-B color index | -0.14 |
| B-V color index | -0.07 |
| Astrometry | |
| Radial velocity (Rv) | -27.3 km/s |
| Proper motion (μ) | RA: 35.48 mas/yr Dec.: 6.05 mas/yr |
| Parallax (π) | 11.36 ± 0.92 mas |
| Distance | 290 ± 20 ly (88 ± 7 pc) |
| Absolute magnitude (MV) | -1.48 |
| Details | |
| Mass | 3.7 M☉ |
| Radius | 5.5 R☉ |
| Luminosity | 370 L☉ |
| Temperature | 10,800 K |
| Metallicity | ? |
| Rotation | 63 km/s (uncertain) (variable) 0,015421927 Year |
| Age | ? years |
| Orbit | |
| Companion | θ Aquilae B |
| Semimajor axis (a) | 1" |
| Inclination (i) | 44° |
| Orbit | |
| Companion | θ Aquilae C |
| Period (P) | 0,046883778234 yr |
| Semimajor axis (a) | 113.7" |
| Inclination (i) | 260° |
| Other designations | |
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Tseen Foo, HD 191692, GC 28010, JP11 3180, TD1 26180, GCRV 12537, N30 4459, TYC 5161-2682-1, 65 Aql, PLX 4790, UBV M 24576, AG-00° 2584, GSC 05161-02682, PMC 90-93 535, UBV 17389, BD-01° 3911, HGAM 861, PPM 180896, uvby98 100191692, BDS 9960 A, HIC 99473, ROT 2926, VDB 129, CCDM J20113-0049A, HIP 99473, SAO 144150, CSI-01° 3911 1, HR 7710, SBC7 790, FK5 756, IDS 20061-0107 A.
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| Database references | |
| SIMBAD | data |
| Database references | |
| SIMBAD | data |
Theta Aquilae (θ Aql / θ Aquilae) is a binary star in the constellation Aquila. It is approximately 287 light years from Earth. It has the traditional name Tseen Foo, which is derived from the Mandarin 天桴 tiānfú meaning "the heavenly raft(er)," it may also mean drumsticks, with Altair, Beta Aquilae and Gamma Aquilae being the drum.
Theta Aquilae is a spectroscopic binary which is classified as a blue-white B-type giant with an apparent magnitude of +3.24. The binary has an orbital period of 17,1243 days.
[edit] Components
| NAME | Right ascension | Declination | Apparent magnitude (V) | Database references |
|---|---|---|---|---|
| θ Aquilae B (BD-01 3911B) | 20h 11m 10.6s | -00° 49' 35 | 13.0 | Simbad |
[edit] References
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