Alpha Lac
HIP 111169; Alpha Lac; 7 Lac
DoubleStar
Lac
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
3.77
Spectral Type
A1.5V
Star Color
White
(B-V 0.01)
Distance
102.6 ly
Position & Identifiers
RA
22h 31m 17.5s
Dec
+50° 16' 57.0"
Constellation
Lac
HR
8585
HIP
111169
Bayer
Alpha
Flamsteed
7 Lac
Double Cat
16021
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Visibility
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Multiple Star System
Separation
46.7″
Companion Mag
11.8
Position Angle
286°
Star Colors
A: White
Discoverer
BU 703
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 46.7″ · PA: 286° · 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
Optical.
Survey Image
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