Hα spectrum of Alpha Cygni - Deneb - HD 197345 - SAO 49941 [A2Ia] - 2015-12-28
Specs
 | Alpha Cygni is a prototype of variable stars which exhibit non-radial pulsations, meaning that some portions of the stellar surface are contracting at the same time, other pats expand. It is a supergiant star in the passage of blue giant to red giant. Stellar wind is shown in the spectra profile of Ha. |
Telescope: Celestron C11 11" SC, f/10, d=280mm
Spectrograph: Lhires III, 2400gr, slit 23u Resolution: 0.0693 Å / pixel, resolving power = 18600
Date: 28th December 2015, 17:51- 18:22 UT, JD 2457385.25
Spectra with 2400 lines/mm, processed with BASS project Calibrated with on atmospheric H2O lines, relative flux 7 images, each 240 seconds (28 minutes) Dark corrected, crop., enlarged by factor 2, stacked with PixInsight Calibrated with BassProject S/N > 350 - focus problem! | Download spectrum 1D FIT: Deneb_20151228.FIT Download spectrum FIT (dry/hel.corr) deneb_20151228_dry_VC13.1984.fit Download spectrum FIT (RAW, 950 KB): Deneb_7x4min_20151228.fit Download BASS project: Deneb_20151228.bun, Deneb_20151228_V.bun Download complete project(980 KB): Deneb_20151228.zip |
Stellar data (Wikipedia.org):
Constellation: Cygnus, RA: 20h 41m 25.915s, Dec: +45° 16′ 49.217″
v = 1.25 mag, Mv = -8.38 mag
Rv = -4.5 km/s
Distance: 2616 +- 215 ly, 802 +-66 pc
Mass: 19 ± 4 MΘ
Radius: 203 ± 17 RΘ
Luninosity: 196000 ± 32000 LΘ
Surface Temperature: 8,525 ± 75 K
