HIP 31766
HIP 31766
DoubleStar
Mon
Visible
Level 6
Professional/Research - Requires steady seeing
Physical Properties
Magnitude
6.21
Variable Type
Beta Cephei (Pulsating)
Spectral Type
O9.5II
Star Color
Yellow-white
(B-V 0.15)
Position & Identifiers
RA
06h 38m 38.1s
Dec
+01° 36' 49.0"
Constellation
Mon
HR
2442
HIP
31766
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Visibility
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Multiple Star System
Separation
0.8″
Companion Mag
11.0
Position Angle
206°
Star Colors
A: Yellow-white
B: Orange
Discoverer
TRN 23
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 0.8″ · PA: 206° · 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
Beta C? 6.2 - 6.25V, 7.5 hrs., possibly longest period Beta C type.
Mon OB1; exciting star of HII region S282 within 0.5d; 21-cm emission.
Luminosity class variously given as I, II and III (classified also as O9.5I and O9.7Ib). uv 1548 absorption strong, | emission weak.
7.5 hrs.
Survey Image
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