Apr 1, 2024

KELT-23 Ab: Exoplanet transit

KELT-23 Ab: My first exoplanet transit (confirmed and published).

KELT-23 Ab is a gas giant orbiting BD+66 911, a G-type star (some studies indicate it is G2V-type) with a size very close to that of our Sun (Mass=0.942 Msun, Radius=0.996 Rsun). 

It is 412 light-years away from us and takes only 2.3 days to complete one orbit around its star. Its discovery was announced in 2019. 

Its mass is 0.938 times that of Jupiter and the distance to its star is 0.03302 AU.

Transit taken remotely on 23/03/2024 (with Moon at 98%) with TOA-150 telescope and STL-11000M camera. 

More information about exoplanets and other transits here.

Mar 22, 2024

M 63 the Sunflower Galaxy

M63 (NGC 5055) also known as the Sunflower Galaxy, was first discovered by Pierre Mechain in 1779. The galaxy was later incorporated with the number 63 in the famous catalogue of the French astronomer Charles Messier, published in 1789... Read more,

Feb 23, 2024

NGC 2633, NGC 2634 and IFN

This is a wide field image of an interesting region in the constellation Camelopardalis with many galaxies and some Integrated Flux nebula (IFN).

The image is a pure RGB combination with almost 48 hours of accumulated exposure... Read more,

Jan 21, 2024

Sh2 - 224

Sharpless 2-224 (Sh2-224) is a supernova remnant in the constellation Auriga. Other designations for this object are SNR G166.0+4.3 and LBN 769 (The Sharpless and Lynds designations actually refer to the Ha regions within the remnant)... Read more,

Dec 2, 2023

NGC 1788 The Cosmic Bat

NGC 1788 is a reflection nebula located in a corner of the constellation Orion and was first described by William Herschel, who included it in the New General Catalogue (NGC). 

As a reflection nebula, it is illuminated by young stars nesting in its core... Read more,

Oct 21, 2023

Sh2-200 (HDW 2)

Sharpless 200 (Sh2-200) is a planetary nebula visible in the constellation Cassiopeia. 

This nebula was first discovered by the American astronomer Stewart Sharpless, who included it in the second edition of his catalogue of H II regions (1959) as Sh2-200... Read more,

Sep 19, 2023

Sh2-129 and Ou4 the Squid Nebula.

Since 2011, when the French amateur astrophotographer Nicolas Outters discovered Ou4, the Squid Nebula, I have wanted to photograph it, but until this summer I had not had the chance to do so. 

The image covers a field of almost two degrees... Read more,