42 Ori
Observable Double Star
Fair (24/100)
Sep: 1.2", Companion: mag 7.5
HIP 26237; 42 Ori
DoubleStar
Ori
Visible
Level 5
Expert level - Requires steady seeing
Physical Properties
Magnitude
4.59
Spectral Type
B1V
Star Color
Blue
(B-V -0.19)
Distance
543.6 ly
Position & Identifiers
RA
05h 35m 23.2s
Dec
-04° 50' 18.0"
Constellation
Ori
HR
1892
HIP
26237
Flamsteed
42 Ori
Double Cat
4187
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Visibility
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Multiple Star System
Separation
1.2″
Companion Mag
7.5
Position Angle
202°
Star Colors
A: Blue
B: Blue-white
Discoverer
DA 4
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 1.2″ · PA: 202° · 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
Binary. COPERNICUS spectra and IR photometry yielded no evidence on the companion.
Color excess E(B-V) = +0.05.
In HII region; Ori OB1c2; sword of Orion. No emission from the nebula.
0.009".
Survey Image
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