Y Oph
Observable Variable Star
Good (56/100)
Range: 5.9 - 6.5, Period: 17.1d
HIP 87495
VariableStar
Oph
Visible
Level 2
Small telescope (4") - Monitor brightness changes
Physical Properties
Magnitude
6.21
Spectral Type
F8Ib-G3Ib
Star Color
Red
(B-V 1.40)
Position & Identifiers
RA
17h 52m 38.8s
Dec
-06° 08' 37.0"
Constellation
Oph
HR
6661
HIP
87495
Variable ID
Y Oph
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Visibility
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Comparison Stars for Y Oph (5.9–6.5)
Nearby stable stars for estimating brightness (AAVSO)
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Multiple Star System
Separation
18.1″
Companion Mag
17.1
Position Angle
212°
Star Colors
A: Red
Discoverer
EVS 32
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 18.1″ · PA: 212° · 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
Delta Cep 5.87 - 6.46V, 17.12413d, period varies. Atypical light curve. Possibly SB.
Probably not IR source.
Survey Image
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