16 Lac
HIP 113281; 16 Lac
DoubleStar
Lac
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
5.59
Range
5.58 - 5.66
Period
12.1 days
Variable Type
Eclipsing Binary (Algol-type)
Spectral Type
B2IV
Star Color
Blue-white
(B-V -0.14)
Position & Identifiers
RA
22h 56m 23.6s
Dec
+41° 36' 14.0"
Constellation
Lac
HR
8725
HIP
113281
Flamsteed
16 Lac
Variable ID
EN Lac
Double Cat
16381
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Visibility
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Light Curve
Multiple Star System
Components
3
Component IDs
AC
Separation
27.6″
Companion Mag
11.4
Position Angle
345°
Star Colors
A: Blue-white
Discoverer
STF2960
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 27.6″ · PA: 345° · 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 Fusion
Stellar Notes
ADS 16381A, Beta C, amp. 0.11B, 0.169170, 0.170770 and 0.181692d. Also EA, amp. 0.04V, 12.096816d.
AB relative position of component unchanged in a century. Probably physical. B, 11.5v F0 at 27". C, F5IV, optical, vsini | =<54k/s.
ADS 16381A, 12.097d, K 23.0k/s, V0 -13.0k/s, asini 3.82. RV pulsation 0.169166d.
Lac OB1.
Survey Image
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