44 Boo
Observable Variable Star
Good (52/100)
Range: 4.7 - 4.9, Period: 6.4h, Type: EW/KW
HIP 73695; 44 Boo
VariableStar
Boo
Visible
Level 3
Medium telescope (6-8") - Monitor brightness changes
Physical Properties
Magnitude
4.76
Range
4.7 - 4.9
Period
6.4 hours
Variable Type
Eclipsing Binary (W UMa-type)
Spectral Type
F9-G1Vn
Star Color
Yellow
(B-V 0.65)
Distance
37.9 ly
Position & Identifiers
RA
15h 03m 47.4s
Dec
+47° 39' 16.0"
Constellation
Boo
HR
5618
HIP
73695
Flamsteed
44 Boo
Variable ID
i Boo
Double Cat
9494
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Visibility
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Light Curve
Comparison Stars for 44 Boo (6.5–7.1)
Nearby stable stars for estimating brightness (AAVSO)
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Multiple Star System
Separation
0.7″
Companion Mag
6.1
Companion Sp
K4V
Position Angle
216°
Star Colors
A: Yellow
B: Orange
Discoverer
STF1909
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 0.7″ · PA: 216° · N up, E left
Unresolved · 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 9494B, EW 6.5 - 7.10v, 0.2678160d. Period changes with orbital motion. Variation in light curve may be caused by | mass transfer between close pair. Reddening at max. due to ADS 9494A. Component A may vary up to 0.09m.
5.3 F5V, var. G2V+G2V, 225.0y, a = 3.772". Combined mag., colors. Combined mass 2.1 solar.
ADS 9494B, 0.2678d, K 115.4k/s, V0 +3.4k/s, msin3i 0.772, asini 0.425.
0.073".
Survey Image
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