9 Sagittae — Star in Sagitta
Observe
1Physical Properties
Magnitude
6.23
Range
6.16 - 6.23
Variable Type
E:
Spectral Type
O7.5Iaf
Star Color
White
(B-V 0.01)
2Position & Identifiers
RA
19h 52m 21.8s
Dec
+18° 40' 19.0"
Constellation
Sagitta
(Sge)
HR
7574
HIP
97796
HD
188001
SAO
105360
Flamsteed
9 Sge
Querying VizieR catalog...
3How easy to spot?
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| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | Hard | V. hard+ | V. 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
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Best season
Jun – Aug
(peak: Jul)
5Survey Image
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6
Size Comparison
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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
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14Stellar Notes
E?, 6.20 - 6.25V, amp. 0.06B, over 80d? Variable polarization. Expanding atmosphere.
Within 1d of HII reg. S84.
Shell star. Also classified O8If.
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.
M71
NGC 6838
Globular cluster — dense ball of ancient stars
Globular Cluster
mag 8.3
0.3°
Sagitta
Gamma Sge
Cool red giant
Star
mag 3.47
1.7°
Sagitta
10 Sge
Pulsating variable, period 8.4d
Variable Star
mag 5.36
2.2°
Sagitta
M27
NGC 6853
Planetary nebula — try an OIII filter
Planetary Nebula
mag 8.1
4.4°
Vulpecula
NGC 6830
Open cluster
Open Cluster
mag 7.9
4.4°
Vulpecula
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Article
Sagitta
Mythology, bright stars, and deep-sky highlights.
Constellation
