Sirius
Observer: GDAA
Spectrum Data
FITS Header Metadata
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| Key | Value |
|---|---|
| SIMPLE | True |
| BITPIX | -32 |
| NAXIS | 1 |
| NAXIS1 | 3543 |
| CRPIX1 | 1 |
| CDELT1 | 1.48193697118948 |
| CRVAL1 | 3750.43823242188 |
| CTYPE1 | Wavelength |
| CUNIT1 | Angstrom |
| SWCREATE | RSpec 2.3.1.76 |
| VERSION | RSpec 2.3.1.76 |
| OBSERVER | DGRA |
| BSS_SITE | Sandvreten Observatory |
| BSS_INST | T41 |
| OBJNAME | Alf CMa |
| DATE-OBS | 2026-03-09T18:22:34 |
| EXPTIME | 40 |
| BSS_VHEL | 0 |
FITS Spectral Image
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Calibrated Spectrum
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Observation Image
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Metadata
| Field | Value |
|---|---|
| Object Name | Sirius |
| Observer | GDAA |
| Site | Sandvreten Observatory |
| Equipment | T41 |
| Observation Date | 2026-03-09 18:22 |
| Julian Date | 2461109.26528 |
| Exposure Time | 40.0 seconds |
| Created | 2026-03-13 15:10 |
| Updated | 2026-03-13 15:10 |
Notes
Sirius A is about twice as massive as the Sun (M☉) and has an absolute visual magnitude of +1.43. It is 25 times as luminous as the Sun,[19] but has a significantly lower luminosity than other bright stars such as Canopus, Betelgeuse, and Rigel. The system is between 200 and 300 million years old.[19] It was originally composed of two bright bluish stars. The initially more massive of these, Sirius B, consumed its hydrogen fuel and became a red giant before shedding its outer layers and collapsing into its current state as a white dwarf around 120 million years ago.[19]