S Muscae — Variable Star in Musca
Excellent (66/100)
Observe
1Physical Properties
Magnitude
6.17
Range
5.89 - 6.49
Period
9.7 days
Variable Type
Classical Cepheid
Spectral Type
F6Ib
supergiant
Star Color
Orange
(B-V 0.84)
2Position & Identifiers
RA
12h 12m 46.8s
Dec
-70° 09' 07.0"
Constellation
Musca
(Mus)
HR
4645
HIP
59551
HD
106111
SAO
251791
Variable ID
S Mus
Querying VizieR catalog...
3How easy to follow?
Magnitude
5.9 – 6.5 mag
Amplitude
0.6 mag
Period
9.66 d
Type
DCEP
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| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | V. hard+ | V. hard | Imp. |
| 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
Feb – Apr
(peak: Mar)
5Survey Image
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6Light Curve
7Comparison Stars for S Mus (5.9–6.5)
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
CDelta 5.89 - 6.49V. Period changes 9.66011 to 9.66007d.
Shortest known orbital per., 506d, for SB with Cepheid primary. Blue companion.
Also classified F6Ib-G0.
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.
Epsilon Mus
Semi-regular variable, range 4.0–4.3
Variable Star
mag 4.11
2.2°
Musca
R Mus
Pulsating variable, period 7.5d
Variable Star
mag 6.33
2.6°
Musca
C108
NGC 4372
Globular cluster — dense ball of ancient stars
Globular Cluster
mag 7.8
2.7°
Musca
Collinder 261
Open cluster
Open Cluster
mag 9.0
2.9°
Musca
IC 2980
Elliptical galaxy
Galaxy
mag 12.41
3.7°
Musca
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Article
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