Eta Car
HR 4210; Eta Car
DoubleStar
Car
Visible
Level 5
Expert level - Requires steady seeing
Physical Properties
Magnitude
6.21
Range
-1.0 - 7.9
Period
2022.900 days
Variable Type
S Doradus (Luminous Blue Variable)
Spectral Type
pec
Star Color
Yellow
(B-V 0.61)
Position & Identifiers
RA
10h 45m 03.6s
Dec
-59° 41' 03.0"
Constellation
Car
HR
4210
Bayer
Eta
Variable ID
Eta Car
Visibility
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Light Curve
Multiple Star System
Components
15
Component IDs
AP
Separation
1.6″
Companion Mag
11.1
Companion Sp
B
Position Angle
317°
Star Colors
A: Yellow
B: Blue
Discoverer
I 1092
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 1.6″ · PA: 317° · N up, E left
Unresolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 3.1″
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
Comp. A of double. SN? S Dor type, -0.8 - 7.9v. Abs. mag. -14 in 1843. Massive star surrounded by expanding gas and | dust shell; soft X-ray source.
Infrared color excess.
HII region R51; may be member of cluster TR 16.
Survey Image
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