Prima Hyadum
HIP 20205; Gamma Tau; 54 Tau
HIP 20205; Gamma Tau; 54 Tau
DoubleStar
Tau
Visible
Level 5
Expert level - Requires steady seeing
Physical Properties
Magnitude
3.65
Spectral Type
G9.5IIIab CN0.5
Star Color
Orange
(B-V 0.99)
Distance
161.5 ly
Position & Identifiers
RA
04h 19m 47.6s
Dec
+15° 37' 39.0"
Constellation
Tau
HR
1346
HIP
20205
Bayer
Gamma
Flamsteed
54 Tau
Querying VizieR catalog...
Visibility
Set a location in User Settings to see visibility data.
Multiple Star System
Separation
0.4″
Position Angle
179°
Star Colors
A: Orange
Discoverer
BLM 1
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 0.4″ · PA: 179° · N up, E left
Unresolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 3.1″
Size Comparison
Querying VizieR for stellar data…
Stellar Lifecycle
Spectral Classification
Hertzsprung-Russell Diagram
Loading HR diagram…
Blackbody Spectrum
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
Stellar Notes
Amp. 0.1V.
In Taurus cluster; Mel 25 #28; the Hyades.
Hyadum I.
Survey Image
Loading survey image…