HD 269810

HD 269810

Classificazione	Gigante blu
Classe spettrale	O2III
Distanza dal Sole	170.000 anni luce
Costellazione	Dorado
Coordinate
(all'epoca J2000.0)
Ascensione retta	5^h 35^m 13,9^s
Declinazione	-67° 33′ 27,5″
Dati fisici
Raggio medio	18,5 R_⊙
Massa	150 circa M_⊙
Temperatura superficiale	52.500 K (media)
Luminosità	2,2 milioni L_⊙
Dati osservativi
Magnitudine app.	+12,28
Magnitudine ass.	-6,3
Velocità radiale	303 km/s
Nomenclature alternative
GCRV 24403, RMC 122, UBV 5767, ARDB C54, SK -67° 211, UCAC2 2218036, ARDB 317, GSC 09162-00101, TYC 9162-101-1, CSI-67-05351, 2MASS J05351389-6733275, UBV M 28781
Modifica dati su Wikidata · Manuale

HD 269810, o R122 è una stella gigante blu della Grande Nube di Magellano, situata visualmente nella costellazione del Dorado^[1]. È una delle stelle più massicce conosciute, con massa di circa 150 volte quella del sole^[2], paragonabile a quella di Eta Carinae e della stella Pistola, le più massicce stelle conosciute prima della scoperta, nel 2010, di R136a1. È anche una delle stelle più calde: di tipo spettrale O2III, ha una temperatura superficiale di oltre 50 000 gradi K e una luminosità di oltre 2 milioni di volte quella del Sole.

Modelli teorici, che prendono in considerazione la velocità di rotazione e la metallicità della zona circostante la stella, indicano che è agli stadi iniziali del suo processo evolutivo^[3].

Note

^ Dati astronomici di HD 269810
^ jumk.de HD 269810
^ Planet N Stars-HD269810, su zaxtor.net. URL consultato il 10 agosto 2011 (archiviato dall'url originale il 29 gennaio 2011).

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