Hα spectrum of Alpha Cygni - Deneb - HD 197345 - SAO 49941 [A2Ia] - 2015-10-05
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: 0.09 Å / pixel, resolving power = 17000
Date: 5th October 2015, 20:33- 21:34 UT, JD 2457301.38
Spectra with 2400 lines/mm, processed with BASS project Calibrated with on atmospheric H2O lines, relative flux 7 images, each 500 seconds (58 minutes) Dark corrected, cropped, enlarged by factor 4 and stacked with PixInsight Calibrated with BassProject, RV-Graphic with VSpec S/N > 200 (VSpec) | Download spectrum 1D FIT: deneb_20151005_Ha.FIT Download spectrum DAT (dry, normalized): deneb_20151005_ha_norm_dry.dat Download BASS project bundle: Deneb_20151005_Ha.bun Download complete project(2.1MB): Deneb_20151005.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
