11 Boötis

11 Boötis
11 Boötis
Classificazionegigante bianca
Classe spettraleA7III C ~
Distanza dal Sole340 anni luce
CostellazioneBoote
Redshift-24,00 ± 5,00
Coordinate
(all'epoca J2000.0)
Ascensione retta14h 01m 10,4807s
Declinazione+27° 23′ 11,738″
Lat. galattica+74,5122°
Long. galattica037,8964°
Dati osservativi
Magnitudine app.6,23
Magnitudine ass.1,14
Parallasse9,59 ± 0,74 mas
Moto proprioAR: -79,26 ± 0,67 mas/anno
Dec: 18,99 ± 0,49 mas/anno
Velocità radiale-24 ± 5 km/s
Nomenclature alternative
GSC 02009-00085, PMC 90-93 368, TYC 2009-85-1, AG +27 1336, HD 122405, PPM 103025, UBV M 19913, BD +28 2287, HIC 68478, ROT 2023, uvby98 100122405, FK5 517, HIP 68478, SAO 83130, YZ 27 6689, GC 18943, HR 5263, [HFE83] 997, GCRV 8243, 2MASS J14011048+2723116, SRS 30517, N30 3185, TD1 17202

11 Boötis è una stella gigante bianca di magnitudine 6,23 situata nella costellazione di Boote. Dista 340 anni luce dal sistema solare.

Osservazione

Si tratta di una stella situata nell'emisfero celeste boreale; grazie alla sua posizione non fortemente boreale, può essere osservata dalla gran parte delle regioni della Terra, sebbene gli osservatori dell'emisfero nord siano più avvantaggiati. Nei pressi del circolo polare artico appare circumpolare, mentre resta sempre invisibile solo in prossimità dell'Antartide. Essendo di magnitudine pari a 6,2, non è osservabile ad occhio nudo; per poterla scorgere è sufficiente comunque anche un binocolo di piccole dimensioni, a patto di avere a disposizione un cielo buio.

Il periodo migliore per la sua osservazione nel cielo serale ricade nei mesi compresi fra fine marzo e agosto; nell'emisfero nord è visibile anche verso l'inizio dell'autunno, grazie alla declinazione boreale della stella, mentre nell'emisfero sud può essere osservata limitatamente durante i mesi tardo-autunnali australi.

Caratteristiche fisiche

La stella è una gigante bianca; possiede una magnitudine assoluta di 1,14 e la sua velocità radiale positiva indica che la stella si sta allontanando dal sistema solare.

Voci correlate

Collegamenti esterni

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

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