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Delta Coronae Borealis — Star in Corona Borealis

Magnitude 4.6–4.7m Star Corona Borealis (CrB) Visible
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1Physical Properties

Magnitude 4.63
Range 4.57 - 4.69
Variable Type RS:
Spectral Type G3.5III-IVFe-1 giant
Star Color Orange (B-V 0.80)
Distance 233 ly

2Position & Identifiers

RA 15h 49m 35.7s
Dec +26° 04' 06.0"
Constellation Corona Borealis (CrB)
HR 5889
HIP 77512
HD 141714
SAO 84019
Bayer Delta
Flamsteed 10 CrB
Variable ID Del CrB
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 Apr – Jun (peak: May)

5Survey Image

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6

Size Comparison

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Compare Stars

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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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14

Light Travel Time Machine

15

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.

Blaze Star
HR 5958
Medium+
Mira-type variable, range 2.0–10.8
Variable Star mag 10.00 2.2° Corona Borealis
Alphecca
HIP 76267; Alpha Coronae Borealis; 5 Coronae Borealis
Easy
Bright naked-eye star, mag 2.2
Star mag 2.23 3.4° Corona Borealis
NGC 6020
Hard+
Elliptical galaxy
Galaxy mag 12.6 4.0° Serpens
Show on Map

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