45 Andromedae

45 Andromedae
45 Andromedae
Classificazionebianco-azzurra nella sequenza principale
Classe spettraleB7III-IV C ~
Distanza dal Sole916 anni luce
CostellazioneAndromeda
Redshift-0,000002 ± 0,000007
Coordinate
(all'epoca J2000.0)
Ascensione retta01h 11m 10,2775s
Declinazione+37° 43′ 26,836″
Lat. galattica-24,9827°
Long. galattica127,2355°
Dati osservativi
Magnitudine app.5,78
Magnitudine ass.-1,46
Parallasse3,56 ± 0,73 mas
Moto proprioAR: -15,54 ± 0,77 mas/anno
Dec: -6,96 ± 0,50 mas/anno
Velocità radiale-0,7 ± 2 km/s
Nomenclature alternative
CCDM J01112+3743AB, CEL 125, HIP 5550, GC 1432, HR 348, TD1 677, GCRV 51359, IDS 01056+3712 AB, TYC 2800-766-1, AG +37 105, 2MASS J01111025+3743268, UBV 1231, ALS 16533, GSC 02800-00766, PLX 243, UBV M 8000, BD +36 201, HD 7019, PPM 66038, uvby98 100007019 AB, BDS 624 AB, HIC 5550, SAO 54494, YPAC 275

45 Andromedae è una stella bianco-azzurra nella sequenza principale di magnitudine 5,78 situata nella costellazione di Andromeda. Dista 916 anni luce dal sistema solare.

Osservazione

Si tratta di una stella situata nell'emisfero celeste boreale. La sua posizione moderatamente boreale fa sì che questa stella sia osservabile specialmente dall'emisfero nord, in cui si mostra alta nel cielo nella fascia temperata; dall'emisfero australe la sua osservazione risulta invece più penalizzata, specialmente al di fuori della sua fascia tropicale. La sua magnitudine pari a 5,8 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 settembre e febbraio; nell'emisfero nord è visibile anche per un periodo maggiore, grazie alla declinazione boreale della stella, mentre nell'emisfero sud può essere osservata solo durante i mesi della tarda primavera e inizio estate australi.

Caratteristiche fisiche

La stella è una bianco-azzurra nella sequenza principale; possiede una magnitudine assoluta di -1,46 e la sua velocità radiale negativa indica che la stella si sta avvicinando al sistema solare.

Voci correlate

Collegamenti esterni

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

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