Beta Doradus — Variable Star in Dorado
Excellent (72/100)
Observe
1Physical Properties
Magnitude
3.76
Range
3.41 - 4.08
Period
9.8 days
Variable Type
Classical Cepheid
Spectral Type
G2Ib
supergiant
Star Color
Orange
(B-V 0.82)
Distance
992 ly
2Position & Identifiers
RA
05h 33m 37.5s
Dec
-62° 29' 23.0"
Constellation
Dorado
(Dor)
HR
1922
HIP
26069
HD
37350
SAO
249311
Bayer
Beta
Variable ID
Bet Dor
Querying VizieR catalog...
3How easy to follow?
Magnitude
3.5 – 4.1 mag
Amplitude
0.6 mag
Period
9.84 d
Type
DCEP
Sign in
and configure your equipment and default location to see a personalized row.
| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | Hard+ | Hard+ | Hard |
| 50 mm finder 50mm finder | Medium | Medium | Medium |
| 150 mm telescope 150mm scope | Medium | Medium | Medium |
Easy
Medium
Hard
Very hard
Impossible
Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs
4Visibility
Set a location in User Settings to see visibility data.
Best season
Nov – Jan
(peak: Dec)
5Survey Image
Loading survey image…
6Light Curve
7Comparison Stars for Beta Dor (3.5–4.1)
Nearby stable stars for estimating brightness (AAVSO)
Loading comparison stars…
Explore
9
Size Comparison
Querying VizieR for stellar data…
10
Compare Stars
11
Spectral Classification
12
Hertzsprung-Russell Diagram
Loading HR diagram…
13
Stellar Lifecycle
14
Blackbody Spectrum
15
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
16
Stellar Fusion
Discover
17Stellar Notes
CDelta 3.46 - 4.08V, 9.84200d. Period varies.
Also classified F4-G4Ia-II.
Same period, originally considered SB in 1924; later identified as pulsating.
18
Light Travel Time Machine
19
Relativistic Travel
Nearby in the Sky
Other targets within a few degrees — pan your scope a little and keep exploring.
Visibility scores assume a 150 mm Newton at Bortle 4.
Explore Nightbase
Related knowledge, tools, and stories — no observation planning required.
Arthur Eddington
1919 eclipse expedition confirming general relativity; first theory of stellar interiors; the Eddington limit
Biography
Variable Stars — A Guide for Observers
A practical guide to visual observation of variable stars: estimating magnitudes, finding comparison stars, recording data, and contributing to science with AAVSO.
Article
Dorado
Mythology, bright stars, and deep-sky highlights.
Constellation
