R136a

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**R136a**
Observation data Epoch J2000

Constellation (pronunciation)	Dorado
Right ascension	05h 38m 42.399s
Declination	-69° 06' 02.81"'
Apparent magnitude (V)	9.5
Characteristics
Spectral type	Wr
U-B color index	?
B-V color index	?
Variable type	None
Astrometry
Radial velocity (R_v)	274 km/s
Proper motion (μ)	RA: 2.7 mas/yr Dec.: 8.0 mas/yr
Absolute magnitude (M_V)	9.63
Distance	65.199723 kLy (19,99 kpc)
Details
Mass	? M_☉
Radius	? R_☉
Luminosity	? L_☉
Temperature	? K
Metallicity	?
Rotation	?
Age	? years
Other designations
* 30 Dor, HD 38268, Brey 82, HTR 15, CAL 72, TYC 9163-1014-1, FD 66, UCAC2 1803442, CD-69° 324, GC 7114, MH 15, CPD-69° 456, CSI-69 456 41, Dor IRS 99, GSC 09163-01014, SAO 249329.
Database references
SIMBAD	data
Image	Click me

R136a is a compact star cluster near the center of the 30 Doradus complex (also known as the Tarantula Nebula), in the Large Magellanic Cloud.

The cluster contains, among other things, twelve very massive and luminous stars in its core. These stars are almost exclusively of spectral type O3, and had initial masses calculated to be in the range of 37 to 76 Mo^[1].

1 Components
2 Citations
3 References
4 See also

[edit] Components

NAME	Right ascension	Declination	Apparent magnitude (V)	Spectral type	Database references
R136 Ab (SNR B0538-69.2)	05^h 37^m 51.6^s	-69° 10' 23	9.59	SNR	Simbad
R136 Ac (PSR J0537-69)	05^h 37^m 47.6^s	-69° 10' 20		Pulsar	Simbad
R136 B (BAT99 111)	05^h 38^m 42.78^s	-69° 06' 03.1	13.66	O4	Simbad