V1401 Aquilae — Variable Star in Aquila
Good (54/100)
Observe
1Physical Properties
Magnitude
6.34
Range
6.18 - 6.55
Period
28.4 days
Variable Type
Semi-Regular Variable (F-K Giant)
Spectral Type
F1III
giant
Star Color
Yellow
(B-V 0.52)
2Position & Identifiers
RA
20h 05m 05.4s
Dec
-11° 35' 58.0"
Constellation
Aquila
(Aql)
HR
7671
HIP
98910
HD
190390
SAO
163245
Variable ID
V1401 Aql
Querying VizieR catalog...
3How easy to follow?
Magnitude
6.2 – 6.6 mag
Amplitude
0.4 mag
Period
28.4 d
Type
SRD
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| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | V. hard | V. hard | Imp. |
| 50 mm finder 50mm finder | Hard+ | Hard+ | Hard+ |
| 150 mm telescope 150mm scope | Hard+ | Hard+ | Hard+ |
Easy
Medium
Hard
Very hard
Impossible
Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs
Out of reach for typical amateur telescopes, even at Bortle 3.
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 V1401 Aql (6.2–6.5)
Nearby stable stars for estimating brightness (AAVSO)
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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
SRd 6.18 - 6.55V, 28.49d.
Discovered as double by W. Herschel; companion not rediscovered.
Probably a supergiant.
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.
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Article
Aquila
Mythology, bright stars, and deep-sky highlights.
Constellation
