9 Sagittarii — Star in Sagittarius
Observe
1Physical Properties
Magnitude
5.97
Spectral Type
O4V((f))
Star Color
White
(B-V 0.00)
2Position & Identifiers
RA
18h 03m 52.4s
Dec
-24° 21' 38.0"
Constellation
Sagittarius
(Sgr)
HR
6736
HIP
88469
HD
164794
SAO
186204
Flamsteed
9 Sgr
Querying VizieR catalog...
3How easy to spot?
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| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | Hard+ | 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
Set a location in User Settings to see visibility data.
Best season
May – Jul
(peak: Jun)
5Survey Image
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Explore
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
Color excess E(B-V) = +0.34.
Cluster NGC 6530 #7; Sgr OB1; in HII reg. S25; in nebulosity.
uv observations indicate dwarf; 1548 emission very strong.
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.
M8
NGC 6523
Emission nebula — try an OIII filter
Emission Nebula
mag 5.8
0.0°
Sagittarius
NGC 6530
Rich open cluster
Open Cluster
mag 4.6
0.1°
Sagittarius
NGC 6544
Globular cluster — dense ball of ancient stars
Globular Cluster
mag 8.3
1.0°
Sagittarius
IC 4678
Diffuse nebula
Diffuse Nebula
mag 10.40
1.1°
Sagittarius
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