Epsilon Muscae — Variable Star in Musca
Excellent (61/100)
Observe
1Physical Properties
Magnitude
4.11
Range
3.99 - 4.31
Period
40 days
Variable Type
Semi-Regular Variable (Late-type Giant)
Spectral Type
M5III
giant
Star Color
Red
(B-V 1.58)
Distance
71 ly
2Position & Identifiers
RA
12h 17m 34.1s
Dec
-67° 57' 39.0"
Constellation
Musca
(Mus)
HR
4671
HIP
59929
HD
106849
SAO
251830
Bayer
Epsilon
Variable ID
Eps Mus
Querying VizieR catalog...
3How easy to follow?
Magnitude
4.0 – 4.3 mag
Amplitude
0.3 mag
Period
40 d
Type
SRB
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| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | Hard | Hard | Hard |
| 50 mm finder 50mm finder | Hard+ | Hard+ | Hard+ |
| 150 mm telescope 150mm scope | Hard+ | Hard+ | Hard+ |
Easy
Medium
Hard
Very hard
Impossible
Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs
Out of reach for typical amateur telescopes, even at Bortle 3.
4Visibility
Set a location in User Settings to see visibility data.
Best season
Feb – Apr
(peak: Mar)
5Survey Image
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6Light Curve
7Comparison Stars for Epsilon Mus (4.0–4.3)
Nearby stable stars for estimating brightness (AAVSO)
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Explore
9
Size Comparison
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10
Compare Stars
11
Spectral Classification
12
Hertzsprung-Russell Diagram
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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
SRb? 3.99 - 4.31V, 40d.
61 Cyg group.
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.
Collinder 261
Open cluster
Open Cluster
mag 9.0
1.9°
Musca
S Mus
Pulsating variable, period 9.7d
Variable Star
mag 6.17
2.2°
Musca
R Mus
Pulsating variable, period 7.5d
Variable Star
mag 6.33
2.7°
Musca
NGC 4833
Globular cluster — dense ball of ancient stars
Globular Cluster
mag 7.4
4.7°
Musca
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Article
Musca
Mythology, bright stars, and deep-sky highlights.
Constellation
