Theta Crateris — Star in Crater
Observe
1Physical Properties
Magnitude
4.70
Spectral Type
B9.5Vn
Star Color
Blue-white
(B-V -0.08)
2Position & Identifiers
RA
11h 36m 40.9s
Dec
-09° 48' 08.0"
Constellation
Crater
(Crt)
HR
4468
HIP
56633
HD
100889
SAO
138296
Bayer
Theta
Flamsteed
21 Crt
Querying VizieR catalog...
3How easy to spot?
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| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | Medium+ | Medium | 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
Feb – Apr
(peak: Mar)
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
About 150d.
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.
Explore Nightbase
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Article
Crater
Mythology, bright stars, and deep-sky highlights.
Constellation
