S Trianguli Australis — Variable Star in Triangulum Australe
Excellent (62/100)
Observe
1Physical Properties
Magnitude
6.41
Range
6.01 - 6.77
Period
6.3 days
Variable Type
Classical Cepheid
Spectral Type
F8II
bright giant
Star Color
Orange
(B-V 0.78)
2Position & Identifiers
RA
16h 01m 10.7s
Dec
-63° 46' 36.0"
Constellation
Triangulum Australe
(TrA)
HR
5939
HIP
78476
HD
142941
SAO
253377
Variable ID
S TrA
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3How easy to follow?
Magnitude
6.1 – 6.8 mag
Amplitude
0.8 mag
Period
6.32 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
Apr – Jun
(peak: May)
5Survey Image
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6Light Curve
7Comparison Stars for S TrA (6.1–6.8)
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
CDelta 6.06 - 6.81V, 6.32344d. Possible blue companion.
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.
C95
NGC 6025
Rich open cluster
Open Cluster
mag 5.1
3.3°
Triangulum Australe
NGC 5938
Barred spiral galaxy
Galaxy
mag 11.49
4.0°
Triangulum Australe
S Nor
Pulsating variable, period 9.8d
Variable Star
mag 6.49
6.3°
Norma
AX Cir
Pulsating variable, period 5.3d
Variable Star
mag 5.87
7.6°
Circinus
X TrA
Semi-regular variable, range 5.0–6.0
Variable Star
mag 5.81
7.8°
Triangulum Australe
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Article
Triangulum Australe
Mythology, bright stars, and deep-sky highlights.
Constellation
