13 Sagittae — Star in Sagitta
Observe
1Physical Properties
Magnitude
5.37
Range
5.27 - 5.57
Variable Type
Semi-Regular Variable
Spectral Type
M4IIIa
bright giant
Star Color
Red
(B-V 1.67)
2Position & Identifiers
RA
20h 00m 03.3s
Dec
+17° 30' 60.0"
Constellation
Sagitta
(Sge)
HR
7645
HIP
98438
HD
189577
SAO
105522
Flamsteed
13 Sge
Variable ID
VZ Sge
Double Cat
13230
Querying VizieR catalog...
3How easy to spot?
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| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | Medium | Hard+ | Hard |
| 50 mm finder 50mm finder | Easy | Easy | Easy |
| 150 mm telescope 150mm scope | Easy | Easy | Easy |
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
Jun – Aug
(peak: Jul)
5Survey Image
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Explore
6
Size Comparison
Querying VizieR for stellar data…
7
Compare Stars
8
Spectral Classification
9
Hertzsprung-Russell Diagram
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10
Stellar Lifecycle
11
Blackbody Spectrum
12
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
13
Stellar Fusion
Discover
14Stellar Notes
Lb? 5.27 - 5.57V, 7.0 - 7.24p.
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.
10 Sge
Pulsating variable, period 8.4d
Variable Star
mag 5.36
1.3°
Sagitta
M71
Angelfish Cluster
Globular cluster — dense ball of ancient stars
Globular Cluster
mag 8.2
2.0°
Sagitta
Gamma Sge
Cool red giant
Star
mag 3.47
2.0°
Sagitta
9 Sge
Hot blue O-type star
Star
mag 6.23
2.2°
Sagitta
M27
NGC 6853
Planetary nebula — try an OIII filter
Planetary Nebula
mag 8.1
5.2°
Vulpecula
NGC 6830
Open cluster
Open Cluster
mag 7.9
6.0°
Vulpecula
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