105 Tau
HIP 23883; 105 Tau
DoubleStar
Tau
Visible
Level 2
Small telescope (4") - Requires steady seeing
Physical Properties
Magnitude
5.89
Spectral Type
B2Ve
Star Color
Yellow-white
(B-V 0.19)
Position & Identifiers
RA
05h 07m 55.5s
Dec
+21° 42' 17.0"
Constellation
Tau
HR
1660
HIP
23883
Flamsteed
105 Tau
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Visibility
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Multiple Star System
Components
3
Component IDs
O
Separation
110.2″
Companion Mag
9.4
Position Angle
249°
Star Colors
A: Yellow-white
B: Yellow-white
Discoverer
S 466
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 110.2″ · PA: 249° · 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
Primary of visual pair is possible occultation double, 6.8, 6.8v, sep. 0.3"; secondary, 9.1v at 111.5" is BD +21d764.
Cas-Tau OB1.
Shell star.
Pole on, but large range in RV in about 13y period.
Survey Image
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