Nunki
HIP 92855; Sigma Sgr; 34 Sgr
HIP 92855; Sigma Sgr; 34 Sgr
DoubleStar
Sgr
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
2.02
Spectral Type
B2.5V
Star Color
Blue
(B-V -0.22)
Distance
227.7 ly
Position & Identifiers
RA
18h 55m 15.9s
Dec
-26° 17' 48.0"
Constellation
Sgr
HR
7121
HIP
92855
Bayer
Sigma
Flamsteed
34 Sgr
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Visibility
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Multiple Star System
Separation
349.0″
Companion Mag
9.9
Position Angle
239°
Star Colors
A: Blue
B: Blue
Discoverer
SMY 4
Eyepiece View
32x
Dawes: 1.9″
TFOV: 1.6°
Realistic = true angular size
Sep: 349.0″ · PA: 239° · N up, E left
Resolved · 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
Interferometer measures indicate multiple star.
Color excess E(B-V) = +0.02.
Sco-Cen assoc.
Lyman alpha and Lyman beta observed from COPERNICUS.
NUNKI; Sadira.
Survey Image
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