Delta Ceti — Star in Cetus
Observe
1Physical Properties
Magnitude
4.07
Range
4.05 - 4.10
Period
3.9 hours
Variable Type
Beta Cephei (Pulsating)
Spectral Type
B2IV
subgiant
Star Color
Blue
(B-V -0.22)
Distance
3,262 ly
2Position & Identifiers
RA
02h 39m 29.0s
Dec
+00° 19' 43.0"
Constellation
Cetus
(Cet)
HR
779
HIP
12387
HD
16582
SAO
110665
Bayer
Delta
Flamsteed
82 Cet
Variable ID
Del Cet
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
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Best season
Sep – Nov
(peak: Oct)
5Survey Image
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Explore
7
Size Comparison
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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 4.05 - 4.10V, 0.16113668d. Per. changed 1965, then increased about 0.7 sec./century.
0.15d, possibly two periods of oscillation.
Cas-Tau OB1.
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.
Explore Nightbase
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