R Doradus — Variable Star in Dorado
Excellent (68/100)
Observe
1Physical Properties
Magnitude
5.40
Range
4.78 - 6.32
Period
172 days
Variable Type
Semi-Regular Variable (Late-type Giant)
Spectral Type
M8eIII:
Star Color
Deep ruby red
(B-V 1.58)
2Position & Identifiers
RA
04h 36m 45.6s
Dec
-62° 04' 39.0"
Constellation
Dorado
(Dor)
HR
1492
HIP
21479
HD
29712
SAO
249066
Variable ID
R Dor
Querying VizieR catalog...
3How easy to follow?
Magnitude
4.8 – 6.6 mag
Amplitude
1.8 mag
Period
172 d
Type
SRB
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| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | Hard | V. hard+ | V. hard |
| 50 mm finder 50mm finder | Easy | Easy | Easy |
| 150 mm telescope 150mm scope | Easy | Easy | Easy |
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
Oct – Dec
(peak: Nov)
5Survey Image
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6Light Curve
7Comparison Stars for R Dor (4.8–6.6)
Nearby stable stars for estimating brightness (AAVSO)
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Explore
8
Size Comparison
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9
Compare Stars
10
Spectral Classification
11
Hertzsprung-Russell Diagram
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12
Stellar Lifecycle
13
Blackbody Spectrum
14
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
15
Stellar Fusion
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16Stellar Notes
Component A of triple, SRb 4.8 - 6.6v, about 338d.
B is 11.9 at 34". Uncertain which of components B,C is the brighter: discordant magnitudes.
Gamma Leo group.
Probable SiO maser emission. One of the brightest stars in infrared and brightest star visually to show a spectrum as | late-type as M8.0.
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.
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Article
Dorado
Mythology, bright stars, and deep-sky highlights.
Constellation
