Messier 25 is an open cluster of stars in the southern constellation of Sagittarius at a distance of about 2,000 light-years away from Earth and is 67.6 million years old.
The yellowish star (U Sagittarii ) in the center of M25, is a Delta Cephei with a period of 6.74 days and changes from magnitude 6.3 to 7.1. The distance to the star can be derived from the apparent brightness and the calculated luminosity, which gives the Cepheids a special significance in astrophysics.
Text by AAPOD2:
M25, also known as the IC 4725 open cluster, is a dazzling assembly of stars situated in the constellation Sagittarius.
This cluster shines brightly against the backdrop of the Milky Way, appearing like a jewel in the night sky. Comprising hundreds of stars, M25 presents a breathtaking display of stellar diversity, with stars of various colors and magnitudes dotting its celestial canvas.
The cluster's proximity to the galactic plane makes it immersed in a sea of stars, enhancing its visual appeal and creating a mesmerizing tapestry of light. With its rich concentration of stars and intricate patterns, M25 offers astronomers and stargazers alike a captivating glimpse into the beauty and complexity of our galaxy.
IAS - Internationale Amateuersternwarte e.V. - Hakos Observatory, Namibia |
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| Mount |
10Micron GM3000 HPS | Links | WEBDA |
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| Telescope | IAS 10" Newton f/4.5 | Award/published | Astrobin | ||
| Camera | QHY268M65 |
AAPOD2 | |||
| Filter | Chroma LRGB | ||||
| Exposure | R 93 / G 93 / B 93 x 60s |
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| Total |
4h 46min |
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| Software |
PixInsight |
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| Date |
March 2024 | |
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| Location |
IAS Hakos Remote Observatory, Namibia | ||||