47 Boötis

47 Boötis

Classificazione	bianca nella sequenza principale
Classe spettrale	A1V D
Distanza dal Sole	260 anni luce
Costellazione	Boote
Redshift	-13,00 ± 2,00
Coordinate
(all'epoca J2000.0)
Ascensione retta	15^h 05^m 25,8345^s
Declinazione	+48° 09′ 03,501″
Lat. galattica	+56,5965°
Long. galattica	080,9542°
Dati fisici
Raggio medio	2,09 R_⊙
Massa	2,37 M_⊙
Acceleraz. di gravità in superficie	4,17 logg
Temperatura superficiale	9549,93 K (media)
Dati osservativi
Magnitudine app.	5,58
Magnitudine ass.	1,07
Parallasse	12,55 ± 0,52 mas
Moto proprio	AR: -65,26 ± 0,62 mas/anno Dec: 29,71 ± 0,49 mas/anno
Velocità radiale	-13,0 ± 2 km/s
Nomenclature alternative
k Boötis, NSV 6934, CSV 101486, HR 5627, FK5 1395, IDS 15021+4832, GC 20308, 2MASS J15052583+4809033, TD1 17960, GCRV 8736, N30 3407, TYC 3484-1579-1, ADS 9500 A, PLX 3414, UBV M 20561, AG +48 1175, GSC 03484-01579, PMC 90-93 983, uvby98 100133962 AB, BD +48 2262, HD 133962, PPM 54524, [HFE83] 1073, CCDM J15054+4809A, HIC 73841, ROT 2147, CSI +48 2262 1, HIP 73841, SAO 45370
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47 Boötis è una stella bianca nella sequenza principale di magnitudine 5,58 situata nella costellazione di Boote. Dista 260 anni luce dal sistema solare.

Osservazione

Si tratta di una stella situata nell'emisfero celeste boreale. La sua posizione è fortemente boreale e ciò comporta che la stella sia osservabile prevalentemente dall'emisfero nord, dove si presenta circumpolare anche da gran parte delle regioni temperate; dall'emisfero sud la sua visibilità è invece limitata alle regioni temperate inferiori e alla fascia tropicale. La sua magnitudine pari a 5,6 la pone al limite della visibilità ad occhio nudo, pertanto per essere osservata senza l'ausilio di strumenti occorre un cielo limpido e possibilmente senza Luna.

Il periodo migliore per la sua osservazione nel cielo serale ricade nei mesi compresi fra maggio e settembre; nell'emisfero nord è visibile anche per gran parte dell'autunno, grazie alla declinazione boreale della stella, mentre nell'emisfero sud può essere osservata limitatamente durante i mesi invernali australi.

Caratteristiche fisiche

La stella è una bianca nella sequenza principale; possiede una magnitudine assoluta di 1,07 e la sua velocità radiale positiva indica che la stella si sta allontanando dal sistema solare.

Voci correlate

Stelle principali della costellazione di Boote

Collegamenti esterni

Dati della stella dall'archivio Simbad, su simbad.u-strasbg.fr.
Dati sul sistema stellare dal sito Vizier, su vizier.u-strasbg.fr.

Portale Stelle: accedi alle voci di Wikipedia che trattano di stelle e costellazioni

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