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Upsilon Coronae Borealis — Star in Corona Borealis

Magnitude 5.8m Star Corona Borealis (CrB) Visible
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Observe

1Physical Properties

Magnitude 5.78
Spectral Type A3V
Star Color White (B-V 0.07)

2Position & Identifiers

RA 16h 16m 44.8s
Dec +29° 09' 01.0"
Constellation Corona Borealis (CrB)
HR 6074
HIP 79757
HD 146738
SAO 84281
Bayer Upsilon
Flamsteed 18 CrB
Double Cat 9990
SIMBAD

3How easy to spot?

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Equipment Bortle 3 Bortle 4 Bortle 5
Naked eye Hard+ Hard V. 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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Explore

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

Discover

14Stellar Notes

Sirius group? UMa stream.

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.

Sigma CrB
HIP 79607; Sigma Coronae Borealis; 17 Coronae Borealis
Easy
Easy double, sep 7.4″
Double Star mag 5.64 4.7° Corona Borealis
Blaze Star
HR 5958
Medium+
Mira-type variable, range 2.0–10.8
Variable Star mag 10.00 5.0° Corona Borealis
NGC 6051
Hard+
Edge-on galaxy
Galaxy mag 13.0 5.8° Serpens
NGC 6210
Easy
Small bright planetary nebula
Planetary Nebula mag 9.0 8.2° Hercules
Show on Map

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