2 Lac
HIP 110351; 2 Lac
DoubleStar
Lac
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
4.57
Variable Type
Ellipsoidal Variable
Spectral Type
B6V
Star Color
Blue-white
(B-V -0.10)
Distance
81.5 ly
Position & Identifiers
RA
22h 21m 01.6s
Dec
+46° 32' 12.0"
Constellation
Lac
HR
8523
HIP
110351
Flamsteed
2 Lac
Double Cat
15862
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Visibility
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Multiple Star System
Separation
47.6″
Companion Mag
11.5
Position Angle
6°
Star Colors
A: Blue-white
Discoverer
HJ 1755
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 47.6″ · PA: 6° · 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 15862A, Ell?, 4.53 - 4.56V.
Visual companion is optical.
ADS 15862A, 2.6164d, K 79.5k/s, V0 -8.9k/s, msin3i 0.873, asini 2.86. Secondary about 1m fainter.
Survey Image
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