HIP 100288
HIP 100288
DoubleStar
Sgr
Visible
Level 4
Large telescope (10"+) - Requires steady seeing
Physical Properties
Magnitude
6.30
Spectral Type
A4/7V
Star Color
Yellow-white
(B-V 0.17)
Position & Identifiers
RA
20h 20m 28.1s
Dec
-29° 11' 50.0"
Constellation
Sgr
HR
7764
HIP
100288
Double Cat
13702
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Visibility
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Multiple Star System
Components
5
Component IDs
AC
Separation
3.7″
Companion Mag
10.1
Position Angle
38°
Star Colors
A: Yellow-white
B: Orange
Discoverer
HJ 5188
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 3.7″ · PA: 38° · 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 C, photometric spectral class A2IV, vsini 53k/s. Component B, 10.1V at 4.1". For component AB, Rakos and | Mermilliod give 6.93V, +0.28(B-V), +0.24(U-B). However, other sources give the following V magnitudes: | Comp. 1976 1978 1980 Preferred | Gronbech and Oblak Ruffener | Olsen | AB 6.635 6.610 6.608 6.61 | C 7.724 7.706 7.72 | Colors converted from the uvby system (Gronbech and Olsen) are AB +0.13(B-V), +0.185(U-B); C +0.165(B-V), +0.14(U-B).
Combined mag. and color of AB and C.
Photometric spectral class A2III.
Survey Image
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