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Mu Ceti — Star in Cetus

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

Magnitude 4.27
Variable Type Delta Scuti (Pulsating)
Spectral Type F0IV subgiant
Star Color Yellow-white (B-V 0.31)
Distance 71 ly

2Position & Identifiers

RA 02h 44m 56.5s
Dec +10° 06' 51.0"
Constellation Cetus (Cet)
HR 813
HIP 12828
HD 17094
SAO 110723
Bayer Mu
Flamsteed 87 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 Sep – Nov (peak: Oct)

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

Delta Sct?
Occultation binary. Combined mag., color.
F1, F4 1202.2d, K 14.4k/s, V0 +32.5k/s, asini 211. Unresolved by speckle interferometry 1983.94.
Hyades moving group.
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.

NGC 1016
Hard+
Elliptical galaxy
Galaxy mag 13.0 8.2° Cetus
Rho Ari
HIP 13654; Rho2 Arietis; 45 Arietis
Hard+
Semi-regular variable, range 5.6–6.0
Variable Star mag 5.91 8.6° Aries
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