10 Lac
HIP 111841; 10 Lac
DoubleStar
Lac
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
4.88
Spectral Type
O9V
Star Color
Blue
(B-V -0.20)
Position & Identifiers
RA
22h 39m 15.7s
Dec
+39° 03' 01.0"
Constellation
Lac
HR
8622
HIP
111841
Flamsteed
10 Lac
Double Cat
16148
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Visibility
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Multiple Star System
Separation
62.6″
Companion Mag
10.3
Position Angle
47°
Star Colors
A: Blue
Discoverer
S 813
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 62.6″ · PA: 47° · 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
Companion 10.02V, +0.28(B-V), +0.3(U-B), A6III-IV, vsini 141k/s.
Color excess E(B-V) = +0.11.
Lac OB1; in HII region.
Possible rapid variations arising in outer layers of the stellar atmosphere. Probably fast rotating pole-on star.
Survey Image
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