115 Tau
HIP 25499; 115 Tau
DoubleStar
Tau
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
5.42
Spectral Type
B5V
Star Color
Blue-white
(B-V -0.10)
Position & Identifiers
RA
05h 27m 10.1s
Dec
+17° 57' 44.0"
Constellation
Tau
HR
1808
HIP
25499
Flamsteed
115 Tau
Double Cat
4038
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Visibility
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Multiple Star System
Components
4
Component IDs
O
Separation
10.1″
Companion Mag
11.1
Companion Sp
F8V
Position Angle
307°
Star Colors
A: Blue-white
B: Yellow
Discoverer
STT 107
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 10.1″ · PA: 307° · 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
ADS 4038A is occultation double. B and C are 10.1v at 305" and 11.8v at 343".
Member of the local association (Pleiades group); Cas-Tau OB1.
Survey Image
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