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Xuange — Star in Boötes

HIP 69732; Lambda Bootis; 19 Bootis

Magnitude 4.2m Star Boötes (Boo) Visible
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1Physical Properties

Magnitude 4.18
Spectral Type A0p
Star Color Blue-white (B-V 0.08)
Distance 72 ly

2Position & Identifiers

RA 14h 16m 23.0s
Dec +46° 05' 18.0"
Constellation Boötes (Boo)
HR 5351
HIP 69732
HD 125162
SAO 44965
Bayer Lambda
Flamsteed 19 Boo
SIMBAD Wikipedia

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 Mar – May (peak: Apr)

5Survey Image

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7

Size Comparison

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8

Compare Stars

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

Discover

15Stellar Notes

Prototype of Lambda Boo stars, dwarfs with very weak metallic lines.
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 5633
Hard+
Barred spiral galaxy
Galaxy mag 12.3 1.9° Boötes
Iota Boo
Easy
Colorful double, sep 38.8″
Double Star mag 4.75 5.3° Boötes
44 Boo
Medium
Eclipsing binary, period 6.4h
Variable Star mag 4.76 8.2° Boötes
Show on Map

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Boötes
Mythology, bright stars, and deep-sky highlights.
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