HIP 42504
Observable Double Star
Good (58/100)
Sep: 16.8", Companion: mag 8.7
HIP 42504
DoubleStar
Vel
Visible
Level 2
Small telescope (4") - Requires steady seeing
Physical Properties
Magnitude
5.19
Variable Type
Ellipsoidal Variable
Spectral Type
B4IV
Star Color
Blue-white
(B-V -0.14)
Position & Identifiers
RA
08h 39m 57.6s
Dec
-53° 03' 18.0"
Constellation
Vel
HR
3442
HIP
42504
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Visibility
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Multiple Star System
Separation
16.8″
Companion Mag
8.7
Position Angle
30°
Star Colors
A: Blue-white
B: Yellow-white
Discoverer
HJ 4126
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 16.8″ · PA: 30° · 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
Component A of double. Ell?, 5.17 - 5.27V.
CPM? Companion F0IV.
Primary of visual double. 3.1d. RV comp. B +12k/s.
Sco-Cen assoc.; probable member of open cluster IC 2391 (#16). See HR 2702.
Survey Image
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