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12 Aquilae — Star in Aquila

Magnitude 4.0m Star Aquila (Aql) Visible
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1Physical Properties

Magnitude 4.02
Spectral Type K1III giant
Star Color Orange (B-V 1.09)
Distance 155 ly

2Position & Identifiers

RA 19h 01m 40.8s
Dec -05° 44' 20.0"
Constellation Aquila (Aql)
HR 7193
HIP 93429
HD 176678
SAO 142931
Flamsteed 12 Aql
SIMBAD

3How easy to spot?

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Equipment Bortle 3 Bortle 4 Bortle 5
Naked eye Easy 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 Jun – Aug (peak: Jul)

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

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.

V Aql
Easy
Semi-regular variable, range 6.6–8.4
Variable Star mag 6.90 0.7° Aquila
Lambda Aql
Easy
Colorful double, sep 12.5″
Double Star mag 3.44 1.4° Aquila
M11
Wild Duck Cluster
Easy
Rich open cluster
Open Cluster mag 5.8 2.7° Scutum
NGC 6712
Easy
Globular cluster — dense ball of ancient stars
Globular Cluster mag 8.2 3.6° Scutum
Show on Map

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