118 Tau
Observable Double Star
Excellent (63/100)
Sep: 4.7", Companion: mag 6.7
HIP 25695; 118 Tau
DoubleStar
Tau
Visible
Level 2
Small telescope (4") - Requires steady seeing
Physical Properties
Magnitude
5.47
Spectral Type
B8.5V
Star Color
Blue-white
(B-V -0.04)
Distance
233.0 ly
Position & Identifiers
RA
05h 29m 16.5s
Dec
+25° 09' 02.0"
Constellation
Tau
HR
1821
HIP
25695
Flamsteed
118 Tau
Double Cat
4068
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Visibility
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Multiple Star System
Components
3
Component IDs
AB
Separation
4.7″
Companion Mag
6.7
Companion Sp
A0V
Position Angle
209°
Star Colors
A: Blue-white
B: Blue-white
Discoverer
STF 716
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 4.7″ · PA: 209° · 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
AB binary, B is A0V; colors for combined light. C, 11.5v at 141".
ADS 4068B, +20k/s; vsini 197k/s.
Survey Image
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