V505 Sgr
Observable Variable Star
Excellent (72/100)
Range: 6.5 - 7.5, Period: 1.2d, Type: EA
HIP 97849
VariableStar
Sgr
Visible
Level 1
Naked eye / Binoculars - Monitor brightness changes
Physical Properties
Magnitude
6.48
Variable Type
Eclipsing Binary (Algol-type)
Spectral Type
A0V+F8IV
Star Color
White
(B-V 0.14)
Position & Identifiers
RA
19h 53m 06.4s
Dec
-14° 36' 11.0"
Constellation
Sgr
HR
7571
HIP
97849
Variable ID
V505 Sgr
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Visibility
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Comparison Stars for V505 Sgr (6.5–7.5)
Nearby stable stars for estimating brightness (AAVSO)
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Multiple Star System
Separation
0.4″
Companion Mag
6.6
Companion Sp
G5IV
Position Angle
182°
Star Colors
A: White
B: Orange
Discoverer
CHR 90
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 0.4″ · PA: 182° · N up, E left
Unresolved · 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 6.48 - 7.51V, 1.18287511d. Period decreases about 0.49s/y. i 80.3d. Contact binary. Masses 2.2 and 1.2 solar, radii | both about 2.2.
Speckle interferometry indicates companion at 0.291", probably not the same as the SB or occultation binary.
6.6 - 8.6v, sep. 0.0002", 1.1829d, K 104k/s, V0 -2k/s, asini 1.69; vsini of secondary 50k/s.
Survey Image
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