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31 Comae Berenices — Star in Coma Berenices

Magnitude 4.9m Star Coma Berenices (Com) Visible
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1Physical Properties

Magnitude 4.94
Range 4.87 - 4.97
Variable Type FKCOM
Spectral Type G0III giant
Star Color Yellow (B-V 0.67)
Distance 297 ly

2Position & Identifiers

RA 12h 51m 41.9s
Dec +27° 32' 26.0"
Constellation Coma Berenices (Com)
HR 4883
HIP 62763
HD 111812
SAO 82537
Flamsteed 31 Com
Variable ID Var?
SIMBAD

3How easy to spot?

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Equipment Bortle 3 Bortle 4 Bortle 5
Naked eye Medium Medium Hard+
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 Feb – Apr (peak: Mar)

5Survey Image

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6

Size Comparison

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7

Compare Stars

8

Spectral Classification

9

Hertzsprung-Russell Diagram

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Read: The Hertzsprung-Russell Diagram — Reading Stars Like a Map
10

Stellar Lifecycle

11

Blackbody Spectrum

12

Stellar Absorption Spectrum

Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.

13

Stellar Fusion

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14Stellar Notes

Member Coma Ber. cluster.
H and K lines weak. In Hertzsprung gap.
15

Light Travel Time Machine

16

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 4559
Easy
Bright spiral galaxy
Galaxy mag 9.9 3.5° Coma Berenices
17 Com
Easy
Easy double, sep 146.4″
Double Star mag 5.29 5.3° Coma Berenices
Coma Star Cluster
Easy
Open cluster
Open Cluster mag 1.8 6.1° Coma Berenices
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