NGC 6388 is a globular cluster located in the constellation Scorpius. The cluster was discovered by Scottish astronomer James Dunlop on May 13, 1826 using a 22.86 cm (9 in) reflector telescope. Due to its moderate apparent magnitude (+6.72), a telescope is required to see it.
NGC 6388 | |
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Observation data (J2000 epoch) | |
Class | III[1][2] |
Constellation | Scorpius[2] |
Right ascension | 17h 36m 17.461s[3][4] |
Declination | −44° 44′ 08.34″[3][4] |
Distance | 32.3 kilolight-years (10 kiloparsecs)[2] |
Apparent magnitude (V) | 6.72[2] |
Apparent dimensions (V) | 6.2 arcmins[2] |
Physical characteristics | |
Mass | 2.17×106[5] M☉ |
Tidal radius | 6.21 arcmins[6] |
VHB | 16.85[6] |
Metallicity | = -0.55[6] dex |