Megrez
Observer: GDAA
Spectrum Data
FITS Header Metadata
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| Key | Value |
|---|---|
| SIMPLE | True |
| BITPIX | -32 |
| NAXIS | 1 |
| NAXIS1 | 3491 |
| CRPIX1 | 1 |
| CDELT1 | 1.48430462594019 |
| CRVAL1 | 3820.86962890625 |
| 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 | Delta UMa |
| DATE-OBS | 2026-03-03T19:43:44 |
| EXPTIME | 480 |
| 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 | Megrez |
| Observer | GDAA |
| Site | Sandvreten Observatory |
| Equipment | T41 |
| Observation Date | 2026-03-03 19:43 |
| Julian Date | 2461103.32153 |
| Exposure Time | 480.0 seconds |
| Created | 2026-03-11 17:50 |
| Updated | 2026-03-11 17:50 |
Notes
Delta UMa, δ UMa. Megrez has two times more mass than the Sun and is about 23 times more luminous.[6] It has a stellar classification of A3 V,[3] which means it is an A-type main sequence star that is generating energy at its core through the nuclear fusion of hydrogen. It rotates rapidly, taking 3.1 hours to complete a rotation across its equator, causing Megrez to have an oblate shape and hotter temperatures at the poles due to gravity darkening.[6]