Theta Sagittae — Star in Sagitta
Observe
1Physical Properties
Magnitude
6.48
Spectral Type
F5IV
subgiant
Star Color
Yellow-white
(B-V 0.38)
Distance
112 ly
2Position & Identifiers
RA
20h 09m 56.6s
Dec
+20° 54' 55.0"
Constellation
Sagitta
(Sge)
HR
7705
HIP
99352
HD
191570
SAO
88276
Bayer
Theta
Flamsteed
17 Sge
Double Cat
13442
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
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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
AB binary. B, 8.7v at 13". C, optical.
0.016".
15
Light Travel Time Machine
16
Relativistic Travel
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.
22 Vul
Observable variable star
Variable Star
mag 5.15
2.9°
Vulpecula
Gamma Sge
Cool red giant
Star
mag 3.47
3.0°
Sagitta
M27
NGC 6853
Planetary nebula — try an OIII filter
Planetary Nebula
mag 8.1
3.0°
Vulpecula
M71
Angelfish Cluster
Globular cluster — dense ball of ancient stars
Globular Cluster
mag 8.2
4.4°
Sagitta
NGC 6830
Open cluster
Open Cluster
mag 7.9
4.9°
Vulpecula
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