HD 52140

HD 52140
HD 52140
Classificazionebianco-azzurra
Classe spettraleB3V C ~
Distanza dal Sole771 anni luce
CostellazioneCane Maggiore
Redshift14,40 ± 2,00
Coordinate
(all'epoca J2000.0)
Ascensione retta06h 58m 43,6975s
Declinazione-30° 59′ 52,932″
Lat. galattica-12,1559°
Long. galattica241,7206°
Dati fisici
Raggio medio2,9[1] R
Massa
Temperatura
superficiale
Luminosità
Età stimata4,2 milioni di anni[2]
Dati osservativi
Magnitudine app.6,39
Magnitudine ass.-0,48
Parallasse4,23 ± 0,61 mas
Moto proprioAR: -10,74 mas/anno
Dec: 6,63 mas/anno
Velocità radiale14,4 ± 2 km/s
Nomenclature alternative
HIP 33591, CSI -30 3757 21, HR 2621, SRS 41509, GC 9190, IDS 06549-3052 A, TD1 8762, CCDM J06587-3059A, GCRV 4591, 2MASS J06584370-3059530, TYC 7089-2713-1, CD -30 3757, N30 1516, UBV 6893, CEL 1475, GSC 07089-02713, PPM 283360, UBV M 40662, CPC 17 3081, HD 52140, SAO 197432, uvby98 511210041 A, CPD -30 1484, HIC 33591

HD 52140 è una stella bianco-azzurra nella sequenza principale di magnitudine 6,39 situata nella costellazione del Cane Maggiore. Dista 771 anni luce dal sistema solare.

Osservazione

Si tratta di una stella situata nell'emisfero celeste australe; grazie alla sua posizione non fortemente australe, può essere osservata dalla gran parte delle regioni della Terra, sebbene gli osservatori dell'emisfero sud siano più avvantaggiati. Nei pressi dell'Antartide appare circumpolare, mentre resta sempre invisibile solo in prossimità del circolo polare artico. Essendo di magnitudine pari a 6,4, 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 dicembre e maggio; nell'emisfero sud è visibile anche all'inizio dell'inverno, grazie alla declinazione australe della stella, mentre nell'emisfero nord può essere osservata limitatamente durante i mesi della tarda estate boreale.

Caratteristiche fisiche

La stella è una bianco-azzurra nella sequenza principale; possiede una magnitudine assoluta di -0,48 e la sua velocità radiale positiva indica che la stella si sta allontanando dal sistema solare.

Sistema stellare

HD 52140 è un sistema multiplo formato da 3 componenti. La componente principale A è una stella di magnitudine 6,39. La componente B è di magnitudine 9,0, separata da 35,0 secondi d'arco da A e con angolo di posizione di 315 gradi. La componente C è di magnitudine 10,0, separata da 70,0 secondi d'arco da A e con angolo di posizione di 320 gradi.

Note

Voci correlate

Collegamenti esterni

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

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