Delta Del
Observable Variable Star
Good (48/100)
Range: 4.4 - 4.5, Period: 3.7h, Type: Delta Sct
HIP 102281; Delta Del; 11 Del
VariableStar
Del
Visible
Level 3
Medium telescope (6-8") - Monitor brightness changes
Physical Properties
Magnitude
4.43
Variable Type
Delta Scuti (Pulsating)
Spectral Type
A7IIIpDel Del
Star Color
Yellow-white
(B-V 0.32)
Distance
250.9 ly
Position & Identifiers
RA
20h 43m 27.5s
Dec
+15° 04' 28.0"
Constellation
Del
HR
7928
HIP
102281
Bayer
Delta
Flamsteed
11 Del
Variable ID
Del Del
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Visibility
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Comparison Stars for Delta Del (4.4–4.5)
Nearby stable stars for estimating brightness (AAVSO)
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Multiple Star System
Separation
0.0″
Companion Mag
5.0
Position Angle
334°
Star Colors
A: Yellow-white
Discoverer
CIA 11
Eyepiece View
15x
Dawes: 1.9″
TFOV: 3.3°
Realistic = true angular size
Sep: 0.0″ · PA: 334° · N up, E left
Unresolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 3.1″
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 Notes
Delta Sct 4.39 - 4.49V, 0.135547 and 0.154991d. Combined magnitude of two components.
40.58d. Both components Delta Sct type variables.
Sirius group?
Underabundant metals. Also classified F0IVp.
Survey Image
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