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  1. Galleries
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  4. » Epsilon Lyrae (the Double-Double)

 
Epsilon Lyrae (the Double-Double)...

Astrofoto

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Epsilon Lyrae (the Double-Double) sent on December 05, 2024 (12:38) by Roberto Ortu. 2 comments, 176 views.

tripod.

Epsilon Lyrae è un sistema stellare che si trova nella costellazione della Lira, non lontano dalla stella Vega e ben osservabile durante le notti estive. La sua distanza dalla Terra è di circa 160 anni luce e, grazie a un buon binocolo, si può facilmente separare in due componenti distanti circa 3 primi d'arco e chiamate Epsilon 1 e Epsilon 2. Al telescopio, a circa 100x, si scopre che ognuna di queste è a sua volta una stella doppia e per questo motivo il sistema viene chiamato anche doppia doppia. La Epsilon1, visibile a destra nella foto, è composta da due stelle con magnitudini di circa 5 e 6,1 e il periodo orbitale è di circa 1700 anni. Le stelle di Epsilon 2 hanno magnitudini molto simili di circa 5,1 e 5,4 e un periodo orbitale di 585 anni. Il periodo orbitale dell'intero sistema è estremamente lungo a causa dell'enorme distanza che separa le due componenti principali. Intorno a Epsilon 2 esiste anche una quinta componente scoperta nel 1985. Telescopio Celestron 114/910 Newton Camera QHY5L-ll-C Filtro UV-IR cut Sharpcap 4.1 per un video contenente 3531 fotogrammi Tempo di esposizione: 151 ms AS!4, Registax 6, Astrosurface V1 e Gimp per elaborare il 40% dei fotogrammi Data e ora: 30 luglio 2024 01:58 UTC (03:58 ora locale) Seeing medio Luogo: Cabras, Sardegna, Italia



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avatarsenior
sent on December 05, 2024 (14:30) | This comment has been automatically translated (show/hide original)

Excellent photo and caption!

avatarsenior
sent on December 10, 2024 (19:18) | This comment has been automatically translated (show/hide original)

I think it is not trivial to succeed in this recovery by highlighting the "double-double" nature of this object. I remember that last summer I was able to observe it visually thanks to friends from the Cremonese Amateur Astronomers Group.




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