LDu14 et Sh2-200

Image RVB

Commentaires sur l’objet photographié

Une belle découverte de Pascal Ledu d’après une idée de Sakib Rasool.

Plus d’infos sur la découverte de Pascal : http://www.cielocean.fr/index.php?page=LDu-14

Données techniques

Données techniques de prise de vue

Object : Ldu 14
Common name :
Date images du 6 sept au 29 octobre 2016
Optics : Newton SV400 F3,8
Mount : Paramount ME Numéro 1
Location : Orange observatory
Seeing : FWhm de
Ccd : Moravian G4
filter wheel : Moravian
filters : Astrodon
SII Ha OIII
Focuser :Atlas
Guiding : Atik 314L+
Temp. out : T° de +10 à +23
Temp ccd : -25°
Total exposure : 33.9 h
tout en binning 1×1
Ha 88 x 10′
OIII : 106 x 10′

RVB : 32 x 1mn par couche

Données scientifiques

This planetary nebula offers a lot to large telescopes and smaller ones with a wider field of view. The nebula responds mostly to the hydrogen-alpha filter and is weak with the standard color RGB filters. So I had to blend the H-Alpha data into the red and blue channels to create a nice HA-RGB image. Interestingly there is a larger outer halo around the brighter part of the nebula but it is very faint and needs the exposure time to capture it. The oxygen III filter picks up very well but the sulfur II is very weak. That said, a good narrowband image can be done. The narrowband image was taken with the Sagrada remote observatory.

Source : http://www.sharplesscatalog.com/sharpless/SH2-200.aspx