HIP 89630
HIP 89630
DoubleStar
Sgr
Visible
Level 4
Large telescope (10"+) - Requires steady seeing
Physical Properties
Magnitude
6.54
Spectral Type
O7III:(n)((f))
Star Color
White
(B-V 0.11)
Position & Identifiers
RA
18h 17m 28.5s
Dec
-18° 27' 48.0"
Constellation
Sgr
HR
6841
HIP
89630
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Visibility
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Multiple Star System
Separation
8.6″
Companion Mag
13.0
Companion Sp
O8
Position Angle
169°
Star Colors
A: White
B: Blue
Discoverer
RST3170
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 8.6″ · PA: 169° · 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
Companion A3V, optical?
3.9735d, K1 107.1k/s, K2 122.9k/s, V0 +9.1k/s, m1sin3i 2.7, m2sin3i 2.3, a1sini 5.8, | a2sini 6.7.
Sgr OB4; exciting star of HII region S41; within 0.5d of S39.
Also classified O7If and O8I(f).
Survey Image
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