W Orionis — Variable Star in Orion
Excellent (64/100)
Observe
1Physical Properties
Magnitude
6.17
Range
5.5 - 6.9
Period
212 days
Variable Type
Semi-Regular Variable (Late-type Giant)
Spectral Type
C6II
bright giant
Star Color
Deep ruby red
(B-V 3.45)
2Position & Identifiers
RA
05h 05m 23.7s
Dec
+01° 10' 39.0"
Constellation
Orion
(Ori)
HR
1648
HIP
23680
HD
32736
SAO
112406
Variable ID
W Ori
Querying VizieR catalog...
3How easy to follow?
Magnitude
5.5 – 6.9 mag
Amplitude
1.4 mag
Period
212 d
Type
SRB
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| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | V. hard+ | V. hard | Imp. |
| 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
Nov – Jan
(peak: Dec)
5Survey Image
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6Light Curve
7Comparison Stars for W Ori (5.5–6.9)
Nearby stable stars for estimating brightness (AAVSO)
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Explore
8
Size Comparison
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9
Compare Stars
10
Spectral Classification
11
Hertzsprung-Russell Diagram
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12
Stellar Lifecycle
13
Blackbody Spectrum
14
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
15
Stellar Fusion
Discover
16Stellar Notes
SRb 8.2 - 12.4p, 212d. Mean mag. varies in period 2450d.
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.
NGC 1671
Bright spiral galaxy
Galaxy
mag 12.88
3.8°
Orion
NGC 1788
Reflection nebula around a bright star
Reflection Nebula
mag 5.80
4.5°
Orion
66 Eri
Variable star, range 5.1–5.6
Variable Star
mag 5.12
5.8°
Eridanus
VV Ori
Eclipsing binary, period 1.5d
Variable Star
mag 5.34
7.4°
Orion
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