30 Oph
HIP 83262; 30 Oph
DoubleStar
Ophiuchus
(Oph)
Visible
Level 2
Small telescope (4") - Requires steady seeing
Physical Properties
Magnitude
4.82
Spectral Type
K4III
Star Color
Red
(B-V 1.48)
Distance
217 ly
Position & Identifiers
RA
17h 01m 03.6s
Dec
-04° 13' 21.0"
Constellation
Ophiuchus
(Oph)
HR
6318
HIP
83262
Flamsteed
30 Oph
Querying VizieR catalog...
Visibility
Set a location in User Settings to see visibility data.
Multiple Star System
Separation
100.4″
Companion Mag
9.7
Position Angle
68°
Star Colors
A: Red
Discoverer
ENG 59
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 100.4″ · PA: 68° · N up, E left
Resolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 2.3″
Size Comparison
Querying VizieR for stellar data…
Compare Stars
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
Light Travel Time Machine
Relativistic Travel
Survey Image
Loading survey image…