Kurhah
HIP 108917; Xi Cep; 17 Cep
Observable Double Star
Good (59/100)
Sep: 8.1", Companion: mag 6.4
HIP 108917; Xi Cep; 17 Cep
DoubleStar
Cep
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
4.29
Spectral Type
A3/6Vm
Star Color
Yellow-white
(B-V 0.34)
Distance
101.9 ly
Position & Identifiers
RA
22h 03m 47.4s
Dec
+64° 37' 40.0"
Constellation
Cep
HR
8417
HIP
108917
Bayer
Xi
Flamsteed
17 Cep
Double Cat
15600
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Visibility
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Multiple Star System
Components
3
Component IDs
AB
Separation
8.1″
Companion Mag
6.4
Position Angle
275°
Star Colors
A: Yellow-white
B: Yellow
Discoverer
STF2863
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 8.1″ · PA: 275° · 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
AB 4.61 A3m, 6.5 F7V or F3III-IV, 3800y, a = 11.5". Aa, 2.254y, a = 0.073". Component B is HD 209791 = GC 30876, | vsini =<25k/s. Component C, 12.7v at 97" optical.
ADS 15600A, 810.9d, K 7.1k/s, V0 -10.7k/s, msin3i 0.855, asini 70.3. sep. SB components 0.06". Resolved by | speckle interferometry. Mass transfer. Secondary undermassive for its luminosity. vsini both components 20k/s.
Hyades group.
K/H/m yield classes A3/F1/F2 respectively.
0.038".
Change of 7k/s in 55y needs confirmation.
Alkurhah; Al Kirdah; Kurhah.
Survey Image
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