X Oph
Observable Variable Star
Excellent (65/100)
Range: 5.9 - 8.6, Period: 329.0d, Type: M
HIP 91389
VariableStar
Oph
Visible
Level 1
Naked eye / Binoculars - Monitor brightness changes
Physical Properties
Magnitude
6.40
Range
5.9 - 8.6
Period
329.000 days
Variable Type
Mira (Long-period Pulsating)
Spectral Type
M6IIIe+K1III
Star Color
Red
(B-V 1.32)
Distance
296.5 ly
Position & Identifiers
RA
18h 38m 21.0s
Dec
+08° 50' 02.0"
Constellation
Oph
HR
7002
HIP
91389
Variable ID
X Oph
Double Cat
11524
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Visibility
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Light Curve
Comparison Stars for X Oph (5.9–9.2)
Nearby stable stars for estimating brightness (AAVSO)
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Multiple Star System
Separation
0.5″
Companion Mag
7.2
Position Angle
126°
Star Colors
A: Red
Discoverer
HU 198
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 0.5″ · PA: 126° · 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
ADS 11524A, M 5.9 - 9.2v, 334.39d.
Var. MBE+K1III, 8.8, 485.3y, a = 0.34". Masses A, 15.9; B, 5.0 solar.
0.002".
Survey Image
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