NGC 6384

NGC 6384
NGC 6384
	Hubble Space Telescope image of NGC 6384
Observation data (J2000 epoch)
Constellation	Ophiuchus
Right ascension	17h 32m 24.302s
Declination	+07° 03′ 36.97″
Heliocentric radial velocity	1,665 km/s
Distance	76.6 Mly (23.5 Mpc)
Characteristics
Type	SAB(r)bc
Mass	1.05 × 1011 M☉
Size	138,000 light years
Other designations
	UGC 10891

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NGC 6384 is an intermediate barred spiral galaxy located about 77 million light-years away in the northern part of the constellation Ophiuchus. It has a morphological classification of SAB(r)bc,^[3] indicating that it is a weakly barred galaxy (SAB) with an inner ring structure (r) orbiting the bar, and moderate to loosely wound spiral arms (bc).^[4] The galaxy is inclined by an angle of 47° to the line of sight, along a position angle of 40°.^[5] The estimated mass of the stars in this galaxy is 105 billion times the mass of the Sun.^[3]

At one time NGC 6384 was considered a normal galaxy with no activity in the nucleus. However, it is now classified as a transition object (T2), which is thought to be a LINER-type galaxy whose emission-line spectra is contaminated by H II regions in the nucleus.^[6]

Two supernovae have been observed in NGC 6384. On 24 June 1971, a type Ia supernova event was discovered in this galaxy at 27″ east and 20″ north of the nucleus. It reached a peak visual magnitude of 12.85 around the end of June.^[7] Designated SN 1971L, it was situated along a spiral arm, suggesting that the progenitor was not a member of the older, more evolved stellar population of the galaxy.^[5] On 3 May 2017, SN 2017drh (type Ia, mag. 17.9) was discovered.^[8]

^ ^a ^b Cite error: The named reference ApJ131_1163 was invoked but never defined (see the help page).
^ ^a ^b Cite error: The named reference MNRAS413_2_813 was invoked but never defined (see the help page).
^ ^a ^b ^c ^d Cite error: The named reference ApJ696_1_411 was invoked but never defined (see the help page).
^ Cite error: The named reference Buta2007 was invoked but never defined (see the help page).
^ ^a ^b Cite error: The named reference AP50_4_426 was invoked but never defined (see the help page).
^ Cite error: The named reference MNRAS350_3_1087 was invoked but never defined (see the help page).
^ Cite error: The named reference MdSAI44_65 was invoked but never defined (see the help page).
^ Transient Name Server entry for SN 2017drh. Retrieved 25 March 2023.

[ApJ131_1163-1] Cite error: The named reference ApJ131_1163 was invoked but never defined (see the help page).

[MNRAS413_2_813-2] Cite error: The named reference MNRAS413_2_813 was invoked but never defined (see the help page).

[ApJ696_1_411-3] Cite error: The named reference ApJ696_1_411 was invoked but never defined (see the help page).

[Buta2007-4] Cite error: The named reference Buta2007 was invoked but never defined (see the help page).

[AP50_4_426-5] Cite error: The named reference AP50_4_426 was invoked but never defined (see the help page).

[MNRAS350_3_1087-6] Cite error: The named reference MNRAS350_3_1087 was invoked but never defined (see the help page).

[MdSAI44_65-7] Cite error: The named reference MdSAI44_65 was invoked but never defined (see the help page).

[8] Transient Name Server entry for SN 2017drh. Retrieved 25 March 2023.

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