Nu Eri
Observable Variable Star
Good (53/100)
Range: 3.87 - 4.01, Period: 4.2h, Type: BCEP+SPB
HIP 21444; Nu Eri; 48 Eri
VariableStar
Eri
Visible
Level 1
Naked eye / Binoculars - Monitor brightness changes
Physical Properties
Magnitude
3.93
Range
3.87 - 4.01
Period
4.2 hours
Variable Type
Beta Cephei (Pulsating)
Spectral Type
B2IV
Star Color
Blue
(B-V -0.21)
Distance
674.0 ly
Position & Identifiers
RA
04h 36m 19.1s
Dec
-03° 21' 09.0"
Constellation
Eri
HR
1463
HIP
21444
Bayer
Nu
Flamsteed
48 Eri
Variable ID
Nu Eri
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Visibility
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Light Curve
Comparison Stars for Nu Eri (3.4–3.6)
Nearby stable stars for estimating brightness (AAVSO)
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Multiple Star System
Separation
51.5″
Companion Mag
13.3
Position Angle
171°
Star Colors
A: Blue
Discoverer
BUP 64
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 51.5″ · PA: 171° · N up, E left
Resolved · 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
Beta C 3.4 - 3.60p, 0.17790414d, changing. Probable interference periods 0.1779 and 0.1735d with beat period of | 7.0256d. Possibly also E, 103.9d.
Ori OB1.
0.19d.
Survey Image
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