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Basic object information
Name: M 18
Type of object: Open cluster
Magnitude: 6.9
Size: 9.0'
Number of stars: 20
Magnitude of brightest star: 8.6
Object classification: II 3 p n
Description: Cl,P,vlC
Notes: 12 * mag 9-10; 1 deg S of M17
Catalog position for epoch J2000.0
Right ascension: 18h 19m 54.0s
Declination: -17° 08' 00"
Constellation: Sagittarius
Observer: Iiro Sairanen
Obs. place: Ahola, Joutseno, Finland
Date/Time: 4/5.9.2003 23.39
Telescope: Dobson 406/1830mm
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Magn: 73x |
Filter: |
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Field: 41' |
NE Lim.mag: 6,7 (Peg) |
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Background sky: 3 |
Seeing: 2 |
Height: 3°
Visuality: I
Weather: humid, +5°C
Vaatimaton parinkymmenen tähden muodostama avonainen.