R Aquilae — Variable Star in Aquila
Showpiece (78/100)
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1Physical Properties
Magnitude
6.09
Range
5.5 - 12.0
Period
269 days
Variable Type
Mira (Long-period Pulsating)
Spectral Type
M7IIIe
bright giant
Star Color
Red
(B-V 1.60)
2Position & Identifiers
RA
19h 06m 22.2s
Dec
+08° 13' 48.0"
Constellation
Aquila
(Aql)
HR
7243
HIP
93820
HD
177940
SAO
124266
Variable ID
R Aql
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3How easy to follow?
Magnitude
5.5 – 12.0 mag
Amplitude
6.5 mag
Period
268.8 d
Type
M
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| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | Imp. | Imp. | Imp. |
| 50 mm finder 50mm finder | V. hard | Imp. | Imp. |
| 150 mm telescope 150mm scope | Medium | Hard+ | Hard |
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)
5Survey Image
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6Light Curve
7Comparison Stars for R Aql (5.5–12.0)
Nearby stable stars for estimating brightness (AAVSO)
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Explore
8
Size Comparison
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9
Compare Stars
10
Spectral Classification
11
Hertzsprung-Russell Diagram
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12
Stellar Lifecycle
13
Blackbody Spectrum
14
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
15
Stellar Fusion
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16Stellar Notes
M 5.5 - 12.0v, 284.2d. Period changes 348.980 - 0.554202n + 0.000552309n2 from JD 2399190. Radio flare detected | in this position.
OH and H2O emission. IR spectra show water vapor. OH, H2O and SiO maser. Also classified M5e-M9e.
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 6756
Open cluster
Open Cluster
mag 11.0
3.6°
Aquila
NGC 6749
Globular cluster — dense ball of ancient stars
Globular Cluster
mag 11.1
6.3°
Aquila
X Oph
Mira-type variable, range 5.9–9.2
Variable Star
mag 6.40
7.0°
Ophiuchus
FF Aql
Pulsating variable, period 4.5d
Variable Star
mag 5.38
9.3°
Aquila
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