Messier 38

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Open cluster
Messier 38
M38a.jpg
Messier 38 (upper half of the picture); below the distant cluster NGC 1907 . Field of view approx. 60 × 80 '
AladinLite
Constellation Carter
Position
equinox : J2000.0
Right ascension 05 h 28 m 42.5 s
declination + 35 ° 51 ′ 18 ″
Appearance

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

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

  1. NASA / IPAC EXTRAGALACTIC DATABASE
  2. a b c d e f Messier 38 at SEDS
  3. a b SIMBAD Astronomical Database
  4. Seligman
  5. Deep-Sky Corner _ Aur _ M38, NGC 1907, Abell 9.htm
  6. Bernd Koch, Stefan Korth: The Messier objects. The 110 classic destinations for sky watchers. Kosmos-Verlag, 213p., ISBN 9783440117439 , Stuttgart 2010