Sh2-102

Sh2-102
Regione H II
Sh2-102
Dati osservativi
(epoca J2000)
CostellazioneCigno
Ascensione retta20h 31m :[1]
Declinazione+30° 36′ :[1]
Coordinate galattichel = 71,4; b = -05,3[1]
Distanza? a.l.  
Magnitudine apparente (V)-
Dimensione apparente (V)40' x 40'
Caratteristiche fisiche
TipoRegione H II
Classe3 1 1[2]
Altre designazioni
LBN 169[1]
Mappa di localizzazione
Sh2-102
Categoria di regioni H II

Sh2-102 è una tenue nebulosa a emissione visibile nella costellazione del Cigno.

Si individua nella parte meridionale della costellazione, a breve distanza dal confine con la Volpetta e nei pressi della stella 41 Cygni; la sua debolezza lo rende un oggetto particolarmente difficile da individuare e da riprendere. Il periodo migliore per la sua osservazione nel cielo serale ricade fra i mesi di giugno e novembre ed è facilitata dalle regioni situate nell'emisfero boreale terrestre.

Si tratta di un debolissimo filamento nebuloso di idrogeno ionizzato che si estende per una quarantina di minuti d'arco a nordest di 41 Cygni; la sua distanza non è conosciuta e la nebulosa è di fatto molto poco studiata.

Note

  1. ^ a b c d Simbad Query Result, su simbad.u-strasbg.fr. URL consultato il 24 settembre 2011.
  2. ^ Sharpless, Stewart, A Catalogue of H II Regions., in Astrophysical Journal Supplement, vol. 4, dicembre 1959, p. 257, DOI:10.1086/190049. URL consultato il 24 settembre 2011.

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