The surface of the red giant star π1 Gruis from PIONIER on the VLT

Astronomers using ESO’s Very Large Telescope have directly observed granulation patterns on the surface of a star outside the Solar System — the ageing red giant π1 Gruis. This remarkable new image from the PIONIER instrument reveals the convective cells that make up the surface of this huge star. Each cell covers more than a quarter of the star’s diameter and measures about 120 million kilometres across.

Credit:

ESO

About the Image

Id:eso1741a
Type:Observation
Release date:20 December 2017, 19:00
Related releases:eso1741
Size:2000 x 2000 px

About the Object

Name:HD 212087, π1 Gruis
Type:Milky Way : Star : Evolutionary Stage : Red Giant
Constellation:Grus
Category:Stars

Image Formats

Large JPEG
166.3 KB
Screensize JPEG
52.4 KB

Zoomable


Wallpapers

1024x768
61.6 KB
1280x1024
83.1 KB
1600x1200
111.3 KB
1920x1200
131.6 KB
2048x1536
159.0 KB

Coordinates

Position (RA):22 22 44.21
Position (Dec):-45° 56' 52.61"
Field of view:0.01 x 0.01 arcminutes
Orientation:North is -0.0° left of vertical

Colours & filters

BandWavelengthTelescope
Infrared
H
1.625 μm Very Large Telescope Interferometer
PIONIER
Infrared
H
1.678 μm Very Large Telescope Interferometer
PIONIER
Infrared
H
1.73 μm Very Large Telescope Interferometer
PIONIER
Infrared
H
1.678 μm Very Large Telescope Interferometer
PIONIER
Infrared
H
1.625 μm Very Large Telescope Interferometer
PIONIER

 

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