Menu

Shedir

HIP 3179; Alpha Cas; 18 Cas

HIP 3179; Alpha Cas; 18 Cas DoubleStar Cas Visible Level 3 Medium telescope (6-8") - Requires steady seeing
Star Map Add to List Add to Plan
Back to Catalog

Physical Properties

Magnitude 2.23
Spectral Type K0- IIIa
Star Color Red (B-V 1.17)
Distance 228.2 ly

Position & Identifiers

RA 00h 40m 30.5s
Dec +56° 32' 14.0"
Constellation Cas
HR 168
HIP 3179
Bayer Alpha
Flamsteed 18 Cas
Variable ID Alp Cas
Double Cat 561

Visibility

Set a location in User Settings to see visibility data.

Multiple Star System

Components 4
Component IDs AD
Separation 24.8″
Companion Mag 14.0
Position Angle 280°
Star Colors A: Red
Discoverer BU 1349

Eyepiece View

80x Dawes: 1.9″ TFOV: 0.6°
Realistic = true angular size
N E 280° A (2.2) B (14.0)

Sep: 24.8″ · PA: 280° · 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

Cst 2.20 - 2.27V.
D is 8.5v K2IV-V, vsini <54k/s. All components probably optical.
SHEDIR; Schedar; Schedir.

Survey Image

Loading survey image…