Pi Gru
HIP 110478; Pi Gru
Excellent (66/100)
HIP 110478; Pi Gru
VariableStar
Gru
Visible
Level 1
Naked eye / Binoculars - Monitor brightness changes
Physical Properties
Magnitude
6.62
Range
5.31 - 7.01
Period
196 days
Variable Type
Semi-Regular Variable (Late-type Giant)
Spectral Type
S5,7e
Star Color
Red
(B-V 2.01)
Position & Identifiers
RA
22h 22m 43.9s
Dec
-45° 56' 52.0"
Constellation
Gru
HR
8521
HIP
110478
Bayer
Pi
Variable ID
Pi1 Gru
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Visibility
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Light Curve
Comparison Stars for Pi Gru (5.4–6.7)
Nearby stable stars for estimating brightness (AAVSO)
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Multiple Star System
Separation
2.8″
Companion Mag
10.7
Position Angle
203°
Star Colors
A: Red
Discoverer
I 135
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 2.8″ · PA: 203° · N up, E left
At limit · 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 Fusion
Stellar Notes
Component A of visual double, SRb 5.41 - 6.70V, about 150d.
Companion G0V. B-V for combined light +2.10. Since 1900 no relative motion of components observed.
Probable Hyades group.
IR shell emission associated with carbon-rich material.
Survey Image
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