Messier 38
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| Messier 38 (upper half of the picture); below the distant cluster NGC 1907 . Field of view approx. 60 × 80 ' | |
| AladinLite | |
| Constellation | Carter |
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Position equinox : J2000.0 |
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| Right ascension | 05 h 28 m 42.5 s |
| declination | + 35 ° 51 ′ 18 ″ |
| Appearance
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| classification | II, 2, r (Trumpler), e (Shapley) |
| Brightness (visual) | 6.4 mag |
| Brightness (B-band) | 6.69 likes |
| Angular expansion | 15 ' |
| Brightest star | 7.9 likes |
| Physical data
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| distance | 4200 ly (1300 pc ) |
| diameter | 25 ly |
| Age | 220 million years |
| history | |
| Discovered by | Hodierna / Le Gentil |
| Discovery time | around 1654 |
| Catalog names | |
| M 38 • NGC 1912 • C 0525 + 358 • OCl 433 • Mel 36 • Cr 67 • Lund 181 • | |
Messier 38 (also known as NGC 1912 ) is one of the three open star clusters (along with M36 and M37 ) in the winter constellation Fuhrmann . Its apparent magnitude is 6.4 mag, its angular extent 21 '. It is around 4000 light years away from the solar system and has a diameter of around 25 light years . M38 is a moderately dense cluster with an estimated age of around 200 million years.
The oldest member stars are giants of the spectral class B5 with an absolute brightness of about −1.5 mag. The object also contains a number of A-type main sequence stars and some giants of type G.
In the 10 × 50 binoculars he shows a little cloud with a handful of single stars 9-10. Size, clearly cruciform in a small telescope, which disappears in more powerful telescopes. Experienced observers can see 100–150 stars in a 20 cm mirror telescope, which are concentrated in the middle and sometimes arranged in rows .
Individual evidence
- ↑ NASA / IPAC EXTRAGALACTIC DATABASE
- ↑ a b c d e f Messier 38 at SEDS
- ↑ a b SIMBAD Astronomical Database
- ↑ Seligman
- ↑ Deep-Sky Corner _ Aur _ M38, NGC 1907, Abell 9.htm
- ↑ Bernd Koch, Stefan Korth: The Messier objects. The 110 classic destinations for sky watchers. Kosmos-Verlag, 213p., ISBN 9783440117439 , Stuttgart 2010
