9 Orionis — Star in Orion
Observe
1Physical Properties
Magnitude
4.07
Spectral Type
K2-IIIFe-1
Star Color
Red
(B-V 1.15)
Distance
172 ly
2Position & Identifiers
RA
04h 56m 22.3s
Dec
+13° 30' 52.0"
Constellation
Orion
(Ori)
HR
1580
HIP
22957
HD
31421
Flamsteed
9 Ori
Double Cat
3540
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3How easy to spot?
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| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | Easy | 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
Set a location in User Settings to see visibility data.
Best season
Oct – Dec
(peak: Nov)
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
Discover
14Stellar Notes
Optical group.
Hyades?
Also classified K2IIIbCN-1.
15
Light Travel Time Machine
16
Relativistic Travel
Survey Image
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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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The HR diagram turns the night sky into a physics map: every named star has a spot, every spot tells you mass, age, and fate. A guide for amateur observers.
Article
Orion
Mythology, bright stars, and deep-sky highlights.
Constellation
