U Aquilae
| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Aquila |
| Right ascension | 19h 29m 21.3603s[1]> |
| Declination | −07° 02′ 38.710″[1] |
| Apparent magnitude (V) | 6.61[2] |
| Characteristics | |
| Spectral type | F5-G1I-II[3] + B9.8V[4] |
| U−B color index | 0.70[2] |
| B−V color index | 1.10[2] |
| Variable type | classical Cepheid[5] |
| Astrometry | |
| Radial velocity (Rv) | -6.5[1] km/s |
| Proper motion (μ) | RA: -0.99[1] mas/yr Dec.: -9.14[1] mas/yr |
| Parallax (π) | 3.63 ± 0.96[1] absmag_v=-0.79 mas |
| Distance | approx. 900 ly (approx. 280 pc) |
| Details | |
| Mass | 7/2[6] M☉ |
| Radius | 55/2.1[6] R☉ |
| Luminosity | 2,570[4] L☉ |
| Surface gravity (log g) | 1.3[7] cgs |
| Temperature | 5,440-6,640[7] K |
| Metallicity [Fe/H] | 0.17[8] dex |
| Orbit | |
| Companion | U Aquilae B |
| Period (P) | 1856[6] days |
| Semi-major axis (a) | 1.311[6]" |
| Eccentricity (e) | 0.17[6] |
| Inclination (i) | 74[6]° |
| Longitude of the node (Ω) | 190[6]° |
| Other designations | |
|
GCRV 11912, IDS 19240-0715 AB, TYC 5143-1372-1, KUI 91AB, IRAS 19266-0708, UBV M 23815, ADS 12503 AB, GSC 05143-01372, LS IV -07 35, UBV 21626, ALS 10306, HD 183344, 2MASS J19292135-0702387, uvby98 100183344 ABV, BD-07° 4968, HERZ 2291, PLX 4556, YZ 97 6771, CCDM J19294-0703AB, HIC 95820, PPM 202954, AAVSO 1924-07, CSI-07 4968 1, HIP 95820, SAO 143454, GC 26905, HR 7402.
|
|
| Database references | |
| SIMBAD | data |
| Data sources: | |
| Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) |
|
U Aquilae is a binary star system[4] in the constellation Aquila. Located approximately 275 parsecs (900 ly) distant, the primary is a classical Cepheid variable ranging between magnitudes 6.08 and 6.86 over a period of 7.02 days,[5] while the secondary is a blue main-sequence star.[4]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 2.0 2.1 2.2 Lua error in package.lua at line 80: module 'strict' not found.
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- ↑ 4.0 4.1 4.2 4.3 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 5.0 5.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 6.0 6.1 6.2 6.3 6.4 6.5 6.6 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 7.0 7.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
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