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Lambda Coronae Borealis — Star in Corona Borealis

Magnitude 5.5m Star Corona Borealis (CrB) Visible
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1Physical Properties

Magnitude 5.45
Spectral Type F0IV subgiant
Star Color Yellow-white (B-V 0.33)
Distance 74 ly

2Position & Identifiers

RA 15h 55m 47.6s
Dec +37° 56' 49.0"
Constellation Corona Borealis (CrB)
HR 5936
HIP 78012
HD 142908
SAO 64974
Bayer Lambda
Flamsteed 12 CrB
SIMBAD

3How easy to spot?

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

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

Also classified A7III.
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.

Zeta CrB
HIP 76669; Zeta2 Coronae Borealis; 7 Coronae Borealis
Easy
Easy double, sep 6.3″
Double Star mag 5.07 3.5° Corona Borealis
NGC 6166
Medium
Elliptical galaxy
Galaxy mag 12.0 6.6° Hercules
30 Her
Easy
Mira-type variable, range 4.3–6.3
Variable Star mag 5.04 7.4° Hercules
M13
Great Hercules Cluster
Easy
Large bright globular cluster
Globular Cluster mag 5.8 9.3° Hercules
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