RS Sgr
Observable Variable Star
Excellent (67/100)
Range: 6.0 - 6.9, Period: 2.4d, Type: EA
HIP 89637
VariableStar
Sgr
Visible
Level 2
Small telescope (4") - Monitor brightness changes
Physical Properties
Magnitude
6.16
Variable Type
Eclipsing Binary (Algol-type)
Spectral Type
B3V+A
Star Color
Blue-white
(B-V -0.11)
Position & Identifiers
RA
18h 17m 36.1s
Dec
-34° 06' 26.0"
Constellation
Sgr
HR
6833
HIP
89637
Variable ID
RS Sgr
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Visibility
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Comparison Stars for RS Sgr (6.0–6.9)
Nearby stable stars for estimating brightness (AAVSO)
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Multiple Star System
Components
4
Component IDs
AC
Separation
38.7″
Companion Mag
9.5
Companion Sp
A2+
Position Angle
85°
Star Colors
A: Blue-white
B: White
Discoverer
HJ 5036
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 38.7″ · PA: 85° · 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
EA 6.0 - 6.9p, 2.4156832d. Period changes. Component A of visual double.
B, 9.68V at 39"; CD, 8.7, 10.2v, sep. 16.5".
2.4157d, K 85.1k/s, V0 +6.0k/s, asini 2.82.
Also classified B4IV.
Survey Image
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