Xi Sco
HIP 78738; Xi Sco
Observable Double Star
Fair (32/100)
Sep: 1.2", Companion: mag 4.9
HIP 78738; Xi Sco
DoubleStar
Sco
Visible
Level 4
Large telescope (10"+) - Requires steady seeing
Physical Properties
Magnitude
4.77
Spectral Type
F5IV
Star Color
Yellow
(B-V 0.47)
Distance
68.0 ly
Position & Identifiers
RA
16h 04m 22.1s
Dec
-11° 22' 23.0"
Constellation
Sco
HR
5978
HIP
78738
Bayer
Xi
Double Cat
9909
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Visibility
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Multiple Star System
Components
5
Component IDs
AB
Separation
1.2″
Companion Mag
4.9
Companion Sp
F5IV
Position Angle
17°
Star Colors
A: Yellow
B: Yellow-white
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 1.2″ · PA: 17° · 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
Quintuple system ADS 9909A-C is CPM with ADS 9910, 7.4 G8V, 8.1K0V sep. 11" at 281" from ADS 9909A. ADS 9909AB 4.9 F5IV, | 4.9 F5IV, 45.69y, a = 0.720". Combined mag. 4.16V, combined colors. ADS 9909C, 7.30V, +0.75(B-V), dG7 at 7", physical.
ADS 9909A, 44.70 yrs. K 3.7k/s, V0 -29.4k/s, asini 549. Period from visual double orbit.
0.038".
Has been called Grafias, a name more commonly applied to HR 5984.
Survey Image
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