Asterope
HIP 17579; 21 Tau
Observable Double Star
Good (47/100)
Sep: 149.6", Companion: mag 6.4
HIP 17579; 21 Tau
DoubleStar
Tau
Visible
Level 1
Naked eye / Binoculars - Requires steady seeing
Physical Properties
Magnitude
5.76
Spectral Type
B8V
Star Color
Blue-white
(B-V -0.04)
Position & Identifiers
RA
03h 45m 54.4s
Dec
+24° 33' 17.0"
Constellation
Tau
HR
1151
HIP
17579
Flamsteed
21 Tau
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Visibility
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Multiple Star System
Separation
149.6″
Companion Mag
6.4
Position Angle
130°
Star Colors
A: Blue-white
B: White
Discoverer
HJL1026
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 149.6″ · PA: 130° · N up, E left
Resolved · 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
Pleiades cluster; Mel 22 #817.
Asterope. Sterope I.
Survey Image
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