Zeta Per
HIP 18246; Zeta Per; 44 Per
DoubleStar
Per
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
2.85
Spectral Type
B1Ib
Star Color
White
(B-V 0.12)
Distance
877.8 ly
Position & Identifiers
RA
03h 54m 07.9s
Dec
+31° 53' 01.0"
Constellation
Per
HR
1203
HIP
18246
Bayer
Zeta
Flamsteed
44 Per
Double Cat
2843
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Visibility
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Multiple Star System
Components
5
Component IDs
AB
Separation
12.8″
Companion Mag
9.2
Companion Sp
B8V
Position Angle
208°
Star Colors
A: White
B: Blue-white
Discoverer
STF 464
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 12.8″ · PA: 208° · 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
2.80 - 2.93V.
AB CPM, B 9.16V B8IV; C, 9.12V at 33" optical; D, 10.35V, +0.713(B-V), +0.20(U-B), at 92" optical; E, 9.90V, A2V, | +0.33(B-V), +0.17(U-B), at 120" physical.
1.765d, K 6.0k/s, V0 +22.2k/s.
Reddened star. Color excess E(B-V) = +0.33.
IC 348; Per OB2.
Interstellar CH detected optically. COPERNICUS data used to analyze the chemical abundances in line of sight to | Zeta Per: CO, HD, and OH. About 60% of the hydrogen in front of the star is molecular.
0.012".
Comp. B +20.8k/s.
Survey Image
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