U Del
Excellent (60/100)
HIP 102440
VariableStar
Del
Visible
Level 1
Naked eye / Binoculars - Monitor brightness changes
Physical Properties
Magnitude
6.38
Range
6.14 - 7.61
Period
120 days
Variable Type
Semi-Regular Variable (Late-type Giant)
Spectral Type
M5II-III
Star Color
Red
(B-V 1.68)
Position & Identifiers
RA
20h 45m 28.2s
Dec
+18° 05' 25.0"
Constellation
Del
HR
7941
HIP
102440
Variable ID
U Del
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Visibility
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Light Curve
Comparison Stars for U Del (6.1–7.6)
Nearby stable stars for estimating brightness (AAVSO)
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Size Comparison
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Stellar Lifecycle
Spectral Classification
Hertzsprung-Russell Diagram
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Blackbody Spectrum
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
Stellar Fusion
Stellar Notes
SRb 7.6 - 8.9p, 110d or 160 - 180d. Mean mag. varies in period 1100d. Amp. 0.26V, 0.04(B-V), 0.19(U-B).
Survey Image
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