Just a test. Guiding problems 6"-8" RMS with my new SkyHunter mount.

M 46, M 47, NGC 2413, NGC 2414, NGC 2422, NGC 2423, NGC 2425, NGC 2428, NGC 2430 and NGC 2437 are all **open clusters** of stars in the constellation Puppis¹²³. They are all relatively young clusters, with ages ranging from about 78 million years (M 47) to about 300 million years (M 46)¹²³. They are all located at distances of about 1.6 kly (490 pc) to about 4.6 kly (1.4 kpc) from Earth¹²³.

M 46 and M 47 are the brightest and most famous of these clusters. They were both discovered by **Charles Messier** in 1771, but he made a mistake in the coordinates of M 47, which led to its rediscovery by **Caroline Herschel** in 1783¹². M 46 contains about 500 stars and has an apparent magnitude of **6.1**¹². M 47 contains about 50 stars and has an apparent magnitude of **4.2**¹². They can both be seen with binoculars or a small telescope as bright patches of light near the star Zeta Puppis¹².

NGC 2413, NGC 2414, NGC 2422, NGC 2423, NGC 2425, NGC 2428, NGC 2430 and NGC 2437 are smaller and fainter clusters that were discovered by various astronomers in the late 18th and early 19th centuries¹². They contain between about 20 stars (NGC 2414) to about 150 stars (NGC 2437) and have apparent magnitudes between about **7.9** (NGC 2437) to about **11.5** (NGC 2414)¹². They can be seen with a medium-sized telescope as faint smudges of light near the star Rho Puppis¹².

The star 140 Pup is a **blue supergiant** star with a spectral type of B0.5Ia. It is one of the brightest stars in the sky, with an apparent magnitude of **3.6**. It is also one of the most luminous stars known, with a luminosity of about **630,000** times that of the Sun. It is located at a distance of about **6.9 kly** (2.1 kpc) from Earth. It can be seen with the naked eye as a bright blue star near the star Pi Puppis.

The star 2 Pup A is a **yellow giant** star with a spectral type of G8III. It has an apparent magnitude of **6.9** and is located at a distance of about **390 ly** (120 pc) from Earth. It can be seen with binoculars or a small telescope as a faint yellow star near the star Sigma Puppis.

The star 2 Pup B is a **red dwarf** star with a spectral type of M0V. It has an apparent magnitude of **11.8** and is located at a distance of about **390 ly** (120 pc) from Earth. It is the companion of 2 Pup A, orbiting it at a separation of about **40 au**. It can be seen with a medium-sized telescope as a faint red star near the star Sigma Puppis.

Kilde: Samtale med Bing, 18.6.2023
(1) Messier 47 – Wikipedia. https://no.wikipedia.org/wiki/Messier_47.
(2) Messier 46 – Wikipedia. https://no.wikipedia.org/wiki/Messier_46.
(3) Messier 93 – Wikipedia. https://no.wikipedia.org/wiki/Messier_93.