74 Oph
HIP 89918; 74 Oph
DoubleStar
Oph
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
4.86
Spectral Type
G8III
Star Color
Orange
(B-V 0.91)
Distance
171.7 ly
Position & Identifiers
RA
18h 20m 52.1s
Dec
+03° 22' 38.0"
Constellation
Oph
HR
6866
HIP
89918
Flamsteed
74 Oph
Double Cat
11271
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Visibility
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Multiple Star System
Components
3
Component IDs
AB
Separation
27.5″
Companion Mag
12.1
Position Angle
284°
Star Colors
A: Orange
Discoverer
HJ 5495
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 27.5″ · PA: 284° · 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
ADS 11271B, 12.08V, +1.08(B-V), +0.50(U-B). May have close fainter white dwarf companion.
Survey Image
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