o Velorum — Star in Vela
Observe
1Physical Properties
Magnitude
3.62
Range
3.57 - 3.63
Period
2.8 days
Variable Type
Slowly Pulsating B Star
Spectral Type
B2.5IV
subgiant
Star Color
Blue
(B-V -0.18)
Distance
537 ly
2Position & Identifiers
RA
08h 40m 17.6s
Dec
-52° 55' 19.0"
Constellation
Vela
(Vel)
HR
3447
HIP
42536
HD
74195
SAO
236164
Variable ID
o Vel
Querying VizieR catalog...
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
Dec – Feb
(peak: Jan)
5Survey Image
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Explore
7
Size Comparison
Querying VizieR for stellar data…
8
Compare Stars
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
Beta C 3.56 - 3.67V, 0.131977d.
3.2 hrs.
In cluster IC 2391 #20.
Expanding circumstellar shell.
Sometimes called omicron Vel, but the letter had originally been "o" (Roman), not omicron.
16
Light Travel Time Machine
17
Relativistic Travel
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.
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