20 Eri
Observable Variable Star
Good (54/100)
Range: 5.23 - 5.32, Period: 1.9d, Type: ACV
HIP 16803; 20 Eri
VariableStar
Eri
Visible
Level 3
Medium telescope (6-8") - Monitor brightness changes
Physical Properties
Magnitude
5.23
Range
5.23 - 5.32
Period
1.930 days
Variable Type
Alpha2 CVn (Magnetic Rotating)
Spectral Type
B9.5p
Star Color
Blue-white
(B-V -0.13)
Distance
233.0 ly
Position & Identifiers
RA
03h 36m 17.4s
Dec
-17° 28' 01.0"
Constellation
Eri
HR
1100
HIP
16803
Flamsteed
20 Eri
Variable ID
EG Eri
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Visibility
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Light Curve
Comparison Stars for 20 Eri (5.2–5.3)
Nearby stable stars for estimating brightness (AAVSO)
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Multiple Star System
Separation
0.2″
Companion Mag
6.8
Position Angle
92°
Star Colors
A: Blue-white
B: White
Discoverer
HDS 456
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 0.2″ · PA: 92° · 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
5.23 - 5.32V, amp. 0.11U, 1.93d.
Pleiades group.
Lambda Boo star, Ca, Mg 4481 wk. Formerly classified B9pSi, helium-weak.
Survey Image
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