V973 Cygni — Variable Star in Cygnus
Good (57/100)
Observe
1Physical Properties
Magnitude
6.34
Range
6.10 - 6.77
Period
40 days
Variable Type
Semi-Regular Variable (Late-type Giant)
Spectral Type
M4-III
Star Color
Red
(B-V 1.64)
2Position & Identifiers
RA
19h 44m 49.0s
Dec
+40° 43' 00.0"
Constellation
Cygnus
(Cyg)
HR
7523
HIP
97151
HD
186776
SAO
48789
Variable ID
V973 Cyg
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3How easy to follow?
Magnitude
6.1 – 6.8 mag
Amplitude
0.7 mag
Period
40 d
Type
SRB
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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 | Medium | Medium | Medium |
| 150 mm telescope 150mm scope | Medium | Medium | Medium |
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 V973 Cyg (6.1–6.8)
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
SRb 7.8 - 8.6p, about 40d.
Arcturus group.
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 6819
Open cluster
Open Cluster
mag 7.3
0.9°
Cygnus
RR Lyr
Pulsating variable, period 13.6h
Variable Star
mag 7.10
4.2°
Lyra
Fawaris
HIP 97165; Delta Cygni; 18 Cygni
Colorful double, sep 2.8″
Double Star
mag 2.87
4.4°
Cygnus
Crescent nebula
NGC 6888
Emission nebula — try an OIII filter
Emission Nebula
mag 7.44
5.8°
Cygnus
RS Cyg
Mira-type variable, range 6.5–9.5
Variable Star
mag 6.50
5.8°
Cygnus
13 Lyr
Semi-regular variable, range 3.9–5.0
Variable Star
mag 4.04
9.7°
Lyra
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