Iota Ophiuchi — Star in Ophiuchus
Observe
1Physical Properties
Magnitude
4.38
Spectral Type
B8V
Star Color
Blue-white
(B-V -0.08)
Distance
112 ly
2Position & Identifiers
RA
16h 54m 00.5s
Dec
+10° 09' 55.0"
Constellation
Ophiuchus
(Oph)
HR
6281
HIP
82673
HD
152614
SAO
102458
Bayer
Iota
Flamsteed
25 Oph
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
Apr – Jun
(peak: May)
5Survey Image
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Explore
7
Size Comparison
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Compare Stars
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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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Light Travel Time Machine
16
Relativistic Travel
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