31 Ori
HIP 25737; 31 Ori
DoubleStar
Ori
Visible
Level 2
Small telescope (4") - Requires steady seeing
Physical Properties
Magnitude
4.71
Spectral Type
K5III
Star Color
Red
(B-V 1.57)
Distance
543.6 ly
Position & Identifiers
RA
05h 29m 44.0s
Dec
-01° 05' 32.0"
Constellation
Ori
HR
1834
HIP
25737
Flamsteed
31 Ori
Variable ID
CI Ori
Double Cat
4097
Querying VizieR catalog...
Visibility
Set a location in User Settings to see visibility data.
Multiple Star System
Separation
12.7″
Companion Mag
9.7
Position Angle
87°
Star Colors
A: Red
Discoverer
STF 725
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 12.7″ · PA: 87° · N up, E left
Resolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 3.1″
Size Comparison
Querying VizieR for stellar data…
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 Notes
ADS 4097, cst? 4.67: -4.71V.
CPM. Companion 9.70V, +0.71(B-V), +0.15(U-B), F7V.
Survey Image
Loading survey image…