HR 6848
HR 6848
DoubleStar
Sgr
Visible
Level 5
Expert level - Requires steady seeing
Physical Properties
Magnitude
6.84
Spectral Type
B0Ib
Star Color
Yellow-white
(B-V 0.31)
Distance
163.1 ly
Position & Identifiers
RA
18h 18m 43.3s
Dec
-18° 37' 10.0"
Constellation
Sgr
HR
6848
Double Cat
11240
Visibility
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Multiple Star System
Components
5
Component IDs
AB
Separation
0.5″
Companion Mag
8.2
Position Angle
138°
Star Colors
A: Yellow-white
B: Yellow
Discoverer
BU 639
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 0.5″ · PA: 138° · N up, E left
Unresolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 3.1″
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
AB binary. C, 8.0v B0.5Ib at 18", vsini 42k/s.
Sgr OB4; exciting star of HII region S41; within 0.5d of S39.
Survey Image
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