Iota Lyrae
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| Observation data Epoch J2000.0 |
|
|---|---|
| Constellation (pronunciation) |
Lyra |
| Right ascension | 19h 7m 18.1291s |
| Declination | +36° 6' 0.566" |
| Apparent magnitude (V) | 5.249 |
| Characteristics | |
| Spectral type | B6IV |
| U-B color index | -0.51 |
| B-V color index | -0.11 |
| Astrometry | |
| Radial velocity (Rv) | -18 km/s |
| Proper motion (μ) | RA: -0.64 mas/yr Dec.: -4.28 mas/yr |
| Parallax (π) | 3.92 ± 0.52 mas |
| Distance | approx. 800 ly (approx. 260 pc) |
| Other designations | |
Iota Lyrae (ι Lyr) is a 5th magnitude star in the constellation Lyra, approximately 800 light years away from Earth. It is a bluish white subgiant star of the spectral type B6IV. It therefore possesses a surface temperature of 11,000 to 25,000 kelvins and is larger, brighter, and at least twice as hot in surface temperature as our Sun. It is a B[e] star, meaning it shows prominent forbidden emission lines of hydrogen in its spectrum.[1] It also rotates rapidly, at an uncertain 250 km/s.[2]
[edit] References
- ^ a b Simbad Query Result. Simbad. Retrieved on October 15, 2007.
- ^ Iota Lyrae. The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991). Retrieved on October 15, 2007.
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