42 Ori

Observable Double Star Fair (24/100)

Sep: 1.2", Companion: mag 7.5

HIP 26237; 42 Ori DoubleStar Orion (Ori) Visible Level 5 Expert level - Requires steady seeing

Star Map Add to List Add to Plan Back to Catalog

Physical Properties

Magnitude 4.59

Spectral Type B1V

Star Color Blue (B-V -0.19)

Distance 544 ly

Position & Identifiers

RA 05h 35m 23.2s

Dec -04° 50' 18.0"

Constellation Orion (Ori)

HR 1892

HIP 26237

Flamsteed 42 Ori

Double Cat 4187

Visibility

Set a location in User Settings to see visibility data.

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

Telescope Eyepiece

80x Dawes: 1.9″ TFOV: 0.6°

Seeing

Scale Realistic = true angular size

Sep: 1.2″ · PA: 202° · N up, E left

Unresolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 2.3″

Size Comparison

Querying VizieR for stellar data…

Compare Stars

Compare with another star

Stellar Lifecycle

Spectral Classification

Hertzsprung-Russell Diagram

Loading HR diagram…

Blackbody Spectrum

Stellar Absorption Spectrum

Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.

Stellar Fusion

Stellar Notes

Double Star

Binary. COPERNICUS spectra and IR photometry yielded no evidence on the companion.

Color

Color excess E(B-V) = +0.05.

Group/Cluster

In HII region; Ori OB1c2; sword of Orion. No emission from the nebula.

Dynamical

0.009".

Light Travel Time Machine

Relativistic Travel

Survey Image

Loading survey image…