Lambda Aquilae — Double Star in Aquila
Excellent (63/100)
Observe
1Physical Properties
Magnitude
3.44
Spectral Type
B9V
Star Color
Blue-white
(B-V -0.09)
Distance
124 ly
2Position & Identifiers
RA
19h 06m 14.9s
Dec
-04° 52' 57.0"
Constellation
Aquila
(Aql)
HR
7236
HIP
93805
HD
177756
SAO
143021
Bayer
Lambda
Flamsteed
16 Aql
Querying VizieR catalog...
3How easy to split?
Primary
3.4 mag
Companion
7.5 mag
Separation
12.5″
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| Telescope | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| 80 mm refractor 80mm refr. | Easy | Easy | Easy |
| 150 mm Newton 150mm Newt. | Easy | Easy | Easy |
| Celestron C8 (203 mm SCT) C8 203mm | Easy | Easy | Easy |
Easy
Medium
Hard
Very hard
Impossible
Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs
4Visibility
Set a location in User Settings to see visibility data.
Best season
Jun – Aug
(peak: Jul)
5Multiple Star System B: optical
Separation
12.5″
Companion Mag
7.5
Position Angle
30°
Star Colors
A: Blue-white
B: Yellow
Discoverer
EHR 16
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
A: 3.4 · B: 7.5 · Sep: 12.5″ · PA: 30° · N up, E right
Resolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 2.3″
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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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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
Semi-regular variable, range 6.6–8.4
Variable Star
mag 6.90
0.9°
Aquila
NGC 6704
Open cluster
Open Cluster
mag 9.2
3.9°
Scutum
NGC 6712
Globular cluster — dense ball of ancient stars
Globular Cluster
mag 8.2
5.0°
Scutum
5 Aql
Easy double, sep 12.5″
Double Star
mag 5.90
6.3°
Aquila
23 Aql
Easy double, sep 3.3″
Double Star
mag 5.10
6.7°
Aquila
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