59 Ser
Observable Double Star
Good (58/100)
Sep: 3.9", Companion: mag 7.6
HIP 90441; 59 Ser
DoubleStar
Ser
Visible
Level 4
Large telescope (10"+) - Requires steady seeing
Physical Properties
Magnitude
5.21
Spectral Type
G0III+A6V
Star Color
Yellow
(B-V 0.50)
Distance
203.8 ly
Position & Identifiers
RA
18h 27m 12.5s
Dec
+00° 11' 46.0"
Constellation
Ser
HR
6918
HIP
90441
Flamsteed
59 Ser
Variable ID
d Ser
Double Cat
11353
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Visibility
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Multiple Star System
Components
3
Component IDs
AB
Separation
3.9″
Companion Mag
7.6
Companion Sp
A6V
Position Angle
322°
Star Colors
A: Yellow
B: Yellow-white
Discoverer
STF2316
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 3.9″ · PA: 322° · 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 11353A, 4.9 - 5.9v.
AB physical. B is F5V, vsini =<54k/s. Component P, vsini 80:k/s.
ADS 11353A is triple spectroscopic system with periods 385 and 1.8505205d. vsini of A-type component 270k/s, of G-type, | 80:k/s. Comp. B may also be SB, and third visual component P at 0.1" from A may be one of the components of the long | period pair. ADS 11353A, 1.8505, K 90k/s, asini 2.29. ADS 11353Ap?, 386.0d, K 28k/s, V0 -23.3k/s, asini 731. | Companion with sep. 0.25" seen only on 1976.61; unresolved at four other epochs between 1976.3 and 1979.5 (McAlister | and Hartkopf). | 28k/s, V0 -23.3k/s, asini 731.
0.007".
Survey Image
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