Chi Dra
HIP 89937; Chi Dra; 44 Dra
DoubleStar
Dra
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
3.57
Spectral Type
F7V (metal-weak)
Star Color
Yellow
(B-V 0.49)
Distance
27.2 ly
Position & Identifiers
RA
18h 21m 03.4s
Dec
+72° 43' 58.0"
Constellation
Dra
HR
6927
HIP
89937
Bayer
Chi
Flamsteed
44 Dra
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Visibility
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Multiple Star System
Components
4
Component IDs
*
Separation
177.8″
Companion Mag
12.1
Position Angle
357°
Star Colors
A: Yellow
Discoverer
BUP 182
Eyepiece View
32x
Dawes: 1.9″
TFOV: 1.6°
Realistic = true angular size
Sep: 177.8″ · PA: 357° · 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
A* 3.57 F7V, 0.768y, a = 0.124". Masses 1.5 and 1.1 Suns. Shortest known period for astrometric binary. Speckle | interferometry indicates component A is binary, sep. about 0.1". B, 12v K1V at 149"; C, 13.5v at 10".
280.531d, K 18.0k/s, V0 +32.5k/s, asini 62.0, i 60.1d. Resolved by speckle interferometry 1986.46, sep. 0.09" | (at 7000 Ang.)
Survey Image
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