AR Cas
Observable Variable Star
Excellent (66/100)
Range: 4.8 - 5.0, Period: 6.1d, Type: EA
HIP 115990
VariableStar
Cas
Visible
Level 3
Medium telescope (6-8") - Monitor brightness changes
Physical Properties
Magnitude
4.91
Variable Type
Eclipsing Binary (Algol-type)
Spectral Type
B3IV
Star Color
Blue-white
(B-V -0.12)
Distance
543.6 ly
Position & Identifiers
RA
23h 30m 02.0s
Dec
+58° 32' 56.0"
Constellation
Cas
HR
8926
HIP
115990
Variable ID
AR Cas
Double Cat
16795
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Visibility
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Comparison Stars for AR Cas (4.8–5.0)
Nearby stable stars for estimating brightness (AAVSO)
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Multiple Star System
Components
8
Component IDs
AC
Separation
0.7″
Companion Mag
9.3
Position Angle
1°
Star Colors
A: Blue-white
B: Yellow
Discoverer
STT 496
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 0.7″ · PA: 1° · N up, E left
Unresolved · 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 16795A, EA 4.84 - 4.98V, 6.0663309d; i 90d.
AB, 4.9, 9.3V, 1500y, sep. 1.1". CD, 8.2 A0Vn, 9.8v, sep. 1.6"; vsini of C, 210k/s. Component E, optical.
ADS 16795A, 6.0663d, K 56.7k/s, V0 -13.4k/s, asini 4.58. Alternate orbits 6.0663309d, K 54.18k/s, V0 -10.10k/s, | asini 4.44; 6.0668d, K 56.2k/s, V0 -11.0k/s, asini 4.6027. Apsidal period 1500 1800y.
Cas-Tau OB1.
0.003" for components CD.
Survey Image
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