Alcyone
Observer: GDAA
Spectrum Data
FITS Header Metadata
Show FITS Header
| Key | Value |
|---|---|
| SIMPLE | True |
| BITPIX | -32 |
| NAXIS | 1 |
| NAXIS1 | 2954 |
| CRPIX1 | 1 |
| CDELT1 | 1.45548207728369 |
| CRVAL1 | 3692.40478515625 |
| CTYPE1 | Wavelength |
| CUNIT1 | Angstrom |
| SWCREATE | RSpec 2.1.1.18 |
| VERSION | RSpec 2.1.1.18 |
| OBSERVER | HLAD |
| BSS_SITE | Sandvreten Observatory L11 |
| BSS_INST | T41 |
| OBJNAME | eta tau |
| DATE-OBS | 2026-01-29T19:16:16 |
| EXPTIME | 30 |
| BSS_VHEL | 0 |
FITS Spectral Image
Click image to open in new tab for zooming
Calibrated Spectrum
Click image to open in new tab for zooming
Observation Image
Click image to open in new tab for zooming
Metadata
| Field | Value |
|---|---|
| Object Name | Alcyone |
| Observer | GDAA |
| Site | Sandvreten Observatory |
| Equipment | T41 |
| Observation Date | 2026-01-31 11:18 |
| Julian Date | 2461071.97083 |
| Created | 2026-01-31 11:18 |
| Updated | 2026-02-11 16:07 |
Notes
Eta Tau, 25 Tau, Alcyone is a blue-white B-type giant, similar to the other bright B-type stars in the Pleiades cluster. With an apparent magnitude of +2.87 and absolute magnitude of −2.39, it is the brightest and most luminous star in the Pleiades. The spectral type of B7IIIe indicates that emission lines are present in its spectrum. Like many Be stars, Alcyone has created a gaseous disk flung into orbit around the star from its equator.