Y Sagittarii — Variable Star in Sagittarius
Excellent (68/100)
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1Physical Properties
Magnitude
5.75
Range
5.35 - 6.09
Period
5.8 days
Variable Type
Classical Cepheid
Spectral Type
F8I
supergiant
Star Color
Orange
(B-V 0.94)
2Position & Identifiers
RA
18h 21m 23.1s
Dec
-18° 51' 36.0"
Constellation
Sagittarius
(Sgr)
HR
6863
HIP
89968
HD
168608
SAO
161376
Variable ID
Y Sgr
Querying VizieR catalog...
3How easy to follow?
Magnitude
5.4 – 6.1 mag
Amplitude
0.7 mag
Period
5.77 d
Type
DCEP
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| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | V. hard+ | V. 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
May – Jul
(peak: Jun)
5Survey Image
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6Light Curve
7Comparison Stars for Y Sgr (5.4–6.1)
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 5.40 - 6.10V, 5.77335d.
Possibly long period.
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.
NGC 6603
Open cluster
Open Cluster
mag 11.0
0.8°
Sagittarius
M24
Small Sagittarius Star Cloud
Bright star cloud
Star Cloud
mag 2.5
1.1°
Sagittarius
IC 1284
Diffuse nebula
Diffuse Nebula
mag 7.70
1.2°
Sagittarius
IC 4715 C
Noteworthy asterism
Asterism
mag 4.50
1.2°
Sagittarius
U Sgr
Pulsating variable, period 6.7d
Variable Star
mag 6.68
2.5°
Sagittarius
V3879 Sgr
Semi-regular variable, range 6.0–6.6
Variable Star
mag 6.35
5.1°
Sagittarius
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