125 Tau
HIP 26640; 125 Tau
DoubleStar
Tau
Visible
Level 6
Professional/Research - Requires steady seeing
Physical Properties
Magnitude
5.18
Spectral Type
B3IV
Star Color
Blue-white
(B-V -0.15)
Position & Identifiers
RA
05h 39m 44.2s
Dec
+25° 53' 49.0"
Constellation
Tau
HR
1928
HIP
26640
Flamsteed
125 Tau
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Visibility
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Multiple Star System
Components
3
Separation
0.5″
Companion Mag
9.5
Position Angle
323°
Star Colors
A: Blue-white
B: Yellow
Discoverer
OCC 231
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 0.5″ · PA: 323° · 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
Triple system: SB and third component 8.5v at 0.32".
5.2, 7.2, sep. 0.0003", 27.864d, K 25.5k/s, V0 +14.8k/s, asini 8.16.
Cas-Tau OB1; member of Pleiades group.
Survey Image
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