81 Tau
Observable Double Star
Good (41/100)
Sep: 162.0", Companion: mag 8.9
HIP 21039; 81 Tau
DoubleStar
Tau
Visible
Level 2
Small telescope (4") - Requires steady seeing
Physical Properties
Magnitude
5.48
Spectral Type
A5m
Star Color
Yellow-white
(B-V 0.26)
Position & Identifiers
RA
04h 30m 38.9s
Dec
+15° 41' 31.0"
Constellation
Tau
HR
1428
HIP
21039
Flamsteed
81 Tau
Querying VizieR catalog...
Visibility
Set a location in User Settings to see visibility data.
Multiple Star System
Separation
162.0″
Companion Mag
8.9
Position Angle
339°
Star Colors
A: Yellow-white
B: Orange
Eyepiece View
32x
Dawes: 1.9″
TFOV: 1.6°
Realistic = true angular size
Sep: 162.0″ · PA: 339° · N up, E left
Resolved · 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
In Hyades cluster; Mel 25 #83.
Survey Image
Loading survey image…