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7 Ceti — Star in Cetus

Magnitude 4.3–4.5m Star Cetus (Cet) Visible
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1Physical Properties

Magnitude 4.44
Range 4.26 - 4.46
Variable Type Semi-Regular Variable
Spectral Type M3III giant
Star Color Red (B-V 1.66)
Distance 112 ly

2Position & Identifiers

RA 00h 14m 38.4s
Dec -18° 55' 58.0"
Constellation Cetus (Cet)
HR 48
HIP 1170
HD 1038
SAO 147169
Flamsteed 7 Cet
Variable ID AE Cet
SIMBAD

3How easy to spot?

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Equipment Bortle 3 Bortle 4 Bortle 5
Naked eye Medium+ Medium Medium
50mm finder Easy Easy Easy
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 Aug – Oct (peak: Sep)

5Survey Image

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7

Size Comparison

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8

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9

Spectral Classification

10

Hertzsprung-Russell Diagram

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Read: The Hertzsprung-Russell Diagram — Reading Stars Like a Map
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

Lb 4.26 - 4.46V.
Wolf 630 group.
Ultraviolet FeII emission.
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.

T Cet
Easy
Semi-regular variable, range 5.0–6.9
Variable Star mag 5.12 2.0° Cetus
NGC 59
Hard+
Elliptical galaxy
Galaxy mag 13.0 2.5° Cetus
107 Aqr
Easy
Easy double, sep 7.4″
Double Star mag 5.29 6.8° Aquarius
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