Theta Sagittarii — Star in Sagittarius
HIP 98412; Theta1 Sagittarii
Observe
1Physical Properties
Magnitude
4.37
Spectral Type
B3IV
subgiant
Star Color
Blue-white
(B-V -0.15)
2Position & Identifiers
RA
19h 59m 44.2s
Dec
-35° 16' 35.0"
Constellation
Sagittarius
(Sgr)
HR
7623
HIP
98412
HD
189103
SAO
211716
Bayer
Theta1
Querying VizieR catalog...
3How easy to spot?
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| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | Medium+ | Medium+ | Medium |
| 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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7
Size Comparison
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8
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9
Spectral Classification
10
Hertzsprung-Russell Diagram
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11
Stellar Lifecycle
12
Blackbody Spectrum
13
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
14
Stellar Fusion
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15Stellar Notes
2.1051d, K 15.9k/s, V0 +0.9k/s, asini 0.460.
Member of the local association (Pleiades group).
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.
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