![cover image](https://wikiwandv2-19431.kxcdn.com/_next/image?url=https://upload.wikimedia.org/wikipedia/commons/thumb/4/41/%25D8%25B2%25D8%25AE%25D8%25A9_%25D8%25B4%25D9%2587%25D8%25A8_%25D8%25A7%25D9%2584%25D8%25A8%25D8%25B1%25D8%25B4%25D8%25A7%25D9%2588%25D9%258A%25D8%25A7%25D8%25AA.jpg/640px-%25D8%25B2%25D8%25AE%25D8%25A9_%25D8%25B4%25D9%2587%25D8%25A8_%25D8%25A7%25D9%2584%25D8%25A8%25D8%25B1%25D8%25B4%25D8%25A7%25D9%2588%25D9%258A%25D8%25A7%25D8%25AA.jpg&w=640&q=50)
Peirsidí
From Wikipedia, the free encyclopedia
Mórchith dreigí is ea na Peirsidí, taispeántas iontach de réaltaí reatha (dreigí) a bhíonn le feiceáil sa spéir ar feadh seachtaine nó mar sin thart ar 12 Lúnasa gach bliain, an lá a thrasnaíonn an Domhan fithis na ndreigeoideach sin.
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Cineál | dreigechith |
Dáta fionnachtana | 36 "RCh"[1] |
Eapainm | Peirséas |
Réad tuismitheora | 109P/Swift-Tuttle |
Réaltbhuíon | Peirséas ![]() |
Saintréithe fisiceacha agus réaltmhéadracha | |
Diallas (δ) | 58° 0′ 0″[2] ![]() |
Cuid de | 109P/Swift-Tuttle ![]() |
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/3/32/In_the_photo_there_is_one_Perseid%2C_Milky_Way_and_Andromega_galaxy_and_light_pollution_on_the_horizon_-_Luhasoo_bog_in_Estonia.jpg/640px-In_the_photo_there_is_one_Perseid%2C_Milky_Way_and_Andromega_galaxy_and_light_pollution_on_the_horizon_-_Luhasoo_bog_in_Estonia.jpg)
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/4/4e/P10220XX.01.49.MESZ.14.08.2019.Berlin.Perseiden.x1.0.gif/320px-P10220XX.01.49.MESZ.14.08.2019.Berlin.Perseiden.x1.0.gif)
Feictear suas le 70 dreige in aghaidh na huaire. Bíonn an dealramh orthu go radaíonn siad amach as an réaltbhuíon Peirséas, agus ainmnítear iad as seo.
Le fírinne, níl ann ach go mbíonn siad sa treo céanna uainn le Peirséas, gan aon bhaint acu leis.
Baineann an cith seo le cóiméad Swift-Tuttle a fionnadh i 1862 is a tháinig an treo seo arís i 1992, agus is é atá sa chith smionagar clochach is gaineamhach in eireaball an chóiméid, atá ag taisteal i bhfithis an chóiméid.
Dreige ar mhéid gráinne gainimh a dhóitear go hiomlán ard san atmaisféar a bhíonn i réalta reatha amháin.[3]