34 Bootis — Variable Star in Boötes
Excellent (68/100)
Observe
1Physical Properties
Magnitude
4.81
Range
4.62 - 4.93
Period
25.5 days
Variable Type
Semi-Regular Variable (Late-type Giant)
Spectral Type
M3-III
Star Color
Red
(B-V 1.66)
Distance
1,631 ly
2Position & Identifiers
RA
14h 43m 25.4s
Dec
+26° 31' 40.0"
Constellation
Boötes
(Boo)
HR
5490
HIP
71995
HD
129712
SAO
83488
Flamsteed
34 Boo
Variable ID
W Boo
Querying VizieR catalog...
3How easy to follow?
Magnitude
4.7 – 5.4 mag
Amplitude
0.7 mag
Period
25.51 d
Type
SRB
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| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | Hard | Hard | V. 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
Mar – May
(peak: Apr)
5Survey Image
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6Light Curve
7Comparison Stars for 34 Boo (4.7–5.4)
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
Discover
16Stellar Notes
SRb 4.7 - 5.4v, about 30d or 450:d.
17
Light Travel Time Machine
18
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
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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
Boötes
Mythology, bright stars, and deep-sky highlights.
Constellation
