The Cepheid Star RS Pup

The nebula around the Cepheid star RS Pup undoubtedly holds a wealth of information about the mass-loss history of this star. It will thus be instrumental to understand the evolution of Cepheids. Less than five years away from the centenary of the discovery of the Period-Luminosity relation by Leavitt & Pickering, RS Pup could well become a ''Rosetta stone'' for this important class of stars. This colour composite image is based on observations made with the 3.6-m ESO New Technology Telescope (NTT) installed at the La Silla Observatory (Chile) and equipped with the ESO Multi-Mode Instrument (EMMI). The image is based on data obtained through B, V, and R-filters. In order to avoid a heavy saturation of the detector, RS Pup was positioned in the gap between the detectors.

Credit:

ESO

About the Image

Id:eso0805a
Type:Observation
Release date:11 February 2008
Related releases:eso0805
Size:1379 x 1376 px

About the Object

Name:RS Puppis
Type:• Milky Way : Star : Type : Variable
• X - Nebulae
Distance:6500 light years
Constellation:Puppis

Image Formats

Fullsize Original
287.6 KB
Large JPEG
256.9 KB
Screensize JPEG
170.4 KB

Wallpapers

1024x768
183.3 KB
1280x1024
263.3 KB
1600x1200
334.4 KB
1920x1200
361.6 KB
2048x1536
464.3 KB

Coordinates

Position (RA):8 13 4.17
Position (Dec):-34° 34' 43.24"
Field of view:5.72 x 5.70 arcminutes
Orientation:North is 120.2° right of vertical

Colours & filters

BandTelescope
Optical
B
New Technology Telescope
EMMI
Optical
V
New Technology Telescope
EMMI
Optical
R
New Technology Telescope
EMMI

 

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