My Astrophotography – Messier 38 (Starfish Cluster)

Messier 38 (Starfish Cluster)

  • When astrophotographers capture Messier 38 in wide-field images, the cluster often appears embedded in or sitting next to a striking glow of red cosmic gas.
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  • The “Starfish” Shape
    It earned its popular nickname because its brightest stars trace out a ragged, trailing pattern that resembles a starfish, an oblique cross.
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  • M38 is a rich cluster hosting more than 100 confirmed stars.
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  • Its most prominent and brightest member is a “yellow giant with the apparent magnitude +7.9 and spectral type G0” which shines 900 times more luminously than our Sun.
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  • M38 cannot be seen with the naked eye but is a very easy target for binoculars.

  • Object Name
    M38

  • Object Type
    Open Cluster

  • Constellation
    Auriga

  • Magnitude
    +7.4

  • Distance
    2,800 light-years

  • Age
    220 million years old

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Equipment

Telescope:

Mount:

Accessories:

Sky-Watcher Esprint 80ED Triplet

Sky-Watcher AZ-EQ6 GT

ZWO ASIair Plus

Camera:

Guiding:

Filter:

ZWO ASI2600MC Pro cooling

ZWO ASI1200MM

Optolong L-eXtreme

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Bortle Scale: Milton Keynes, Buckinghamshire (Bortle 6.3)
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Integration

  • Date:
    Tuesday 1st September 2026
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  • Time:
    01:00
  • Moonlit:
    Waning Gibbous 20 days old
    Magnitude: -12.5
    Moonlit: 83%
  • Total:
    180’s x 9 subs = 27 minutes

    Stopped at 27 minutes due the clouds interrupted.

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Constellation :- Auriga (The Charioteer)

Object :-

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Object :-

Other name :-

Type :-

Magnitude :

Distance :-

Constellation :-

Right Ascension :-

Declination :-

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M38

NGC 1912

Open Cluster

+7.4

2,800 light years / 16 light years across

Aur (Auriga / The Charioteer)

05h 28m 07s

+35° 50′ 12″

Enlarge on click the map.

(Click the map above for a large view.)

Abbreviation:  Aur (Auriga)
English Name:  The Charioteer
Genitive: Capella
Hemisphere: Northern Hemisphere
Location: Between the constellations of Taurus and Camelopardis.
Visible between latitudes:  +90 and -40 degrees
Best season: Winter
Seen in three seasons: Autumn, Winter and Spring
Best seen in:  January and February (This constellation of Auriga stays in the sky all the year.) (map)
Seen between: October and March
Right Ascension (RA): 06 hour
Declination (DEC): +40 degrees
Area (square degrees):  657 (21st)

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Why it is named the Starfish Cluster?

  • Messier 38 is called the Starfish Cluster because of it’s conspicuous “X” shape as seen through a telescope.
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