Ogled vira Orionidi

{{Infobox meteor shower
| name               = Orionidi (ORI)
| image              = [[Image:Orionid12n.jpg|255px]]
| caption            = [[Meteor]] Orionidov (sredina desno) pod [[Rimska cesta (galaksija)|Rimsko cesto]] in desno od [[Venera|Venere]]. Na sliki je vidna tudi [[zodiakalna svetloba]].
| pronounce          = 
| date               = oktober 1839<ref name=jenniskens2006/>
| parent             = [[1P/Halley]]<ref name=moore_rees2011/>
<!-- Radiant -->
| constellation      = [[Orion (ozvezdje)|Orion]] (blizu [[Betelgeza|Betelgeze]])
| ra                 = {{RA|06|24}}<ref name=moore_rees2011/>
| dec                = {{DEC|+15}}<ref name=moore_rees2011/>
<!-- Properties -->
| month              = {{Nowrap|16. oktober – 27. oktober}}<ref name=moore_rees2011/>
| peak               = 21.&nbsp;oktober<ref name=moore_rees2011/>
| velocity           = 66,9<ref name=mnras416_4_2550/>
| zhr                = typically 20–25<ref name=rendtel2008/>
| notes              = 
}}
[[Slika:Orion constellation map.png|right|250 px|thumb|Ozvezdje Oriona]]
'''Orionidi'''  so [[meteor|meteorji]], ki pripadajo vsakoletnemu [[meteorski roj|meteorskemu roju]].<br>
[[Radiant (astronomija)|Radiant]] Orionidov leži v [[ozvezdje|ozvezdju]] [[Orion (ozvezdje)|Oriona (Ori)]] (Orionis). Orionidi se pojavljajo od [[16. oktober|16. oktobra]] do [[27. oktober|27. oktobra]], svoj vrhunec pa dosežejo [[21. oktober|21. oktobra]].
Starševsko telo (izvorni [[komet]]) je periodični  [[Halleyjev komet|Halleyev komet]] (obhodna doba okoli 76 let). Delci iz istega kometa povročajo tudi meteorski roj [[Eta Akvaridi]]. 

== Opazovanje ==
Orionidi spadajo med najmočnejše in najbolj opazovane meteorske roje. Radiant leži v severovzhodnem delu ozvezdja Orion (levo nad znano zvezdo [[Betelgeza|Betelgezo]]).
Ker ima komet Halley retrogradno orbito, imajo prašni delci iz kometa relativno veliko hitrost glede na Zemljo, ki jo zadenejo s hitrostjo do 66 km/s. Opazovalec vidi v jasni in temni noči okoli 10 meteorjev na uro. 
 
== Glej tudi ==
*[[meteorski roj]]
*[[seznam meteorskih rojev]]

==Sklici==
{{reflist|refs=

<ref name=moore_rees2011>{{citation | first1=Patrick | last1=Moore | first2=Robin | last2=Rees | title=Patrick Moore's Data Book of Astronomy | edition=2. | publisher=Cambridge University Press | year=2011 | isbn=0-521-89935-4 | page=275 | url=http://books.google.com/books?id=2FNfjWKBZx8C&pg=PA275 | postscript=. }}</ref>

<ref name=mnras416_4_2550>{{citation | display-authors=1 | last1=Kero | first1=J. | last2=Szasz | first2=C. | last3=Nakamura | first3=T. | last4=Meisel | first4=D. D. | last5=Ueda | first5=M. | last6=Fujiwara | first6=Y. | last7=Terasawa | first7=T. | last8=Miyamoto | first8=H. | last9=Nishimura | first9=K. | title=First results from the 2009-2010 MU radar head echo observation programme for sporadic and shower meteors: the Orionids 2009 | journal=[[Monthly Notices of the Royal Astronomical Society]] | volume=416 | issue=4 | pages=2550–2559 |date=October 2011 | doi=10.1111/j.1365-2966.2011.19146.x | bibcode=2011MNRAS.416.2550K | postscript=. }}</ref>

<ref name=jenniskens2006>{{citation | first1=Peter | last1=Jenniskens | title=Meteor Showers And Their Parent Comets | publisher=Cambridge University Press | year=2006 | isbn=0521853494 | page=9 | url=http://books.google.com/books?id=QpajMuyXG8AC&pg=PA9 | postscript=. }}</ref>

<ref name=rendtel2008>{{citation | first1=Jürgen | last1=Rendtel | contribution=The Orionid meteor shower observed over 70 years | title=Advances in Meteoroid and Meteor Science | editor1-first=J. M. | editor1-last=Trigo-Rodríguez | editor2-first=F. J. M. | editor2-last=Rietmeijer | editor3-first=Jordi | editor3-last=Llorca | editor4-first=Diego | editor4-last=Janches | publisher=Springer | year=2008 | isbn=0387784187 | pages=106–109 | url=http://books.google.com/books?id=2Y3POvMXDcgC&pg=PA106 | postscript=.}}</ref>

}}

== Zunanje povezave ==
*[http://www.metacafe.com/watch/893620/orionids_meteor_shower/ Posnetek Orionodov]
*[http://www.astronomynotes.net/2006/10/19/the-meteor-shower-orionids/  Položaj radianta pri Orionodih]{{Slepa povezava|date=oktober 2022 |bot=InternetArchiveBot |fix-attempted=yes }}
*[http://astroprofspage.com/archives/318 Opis Orionidov]
*[http://www.bellaonline.com/articles/art53591.asp Opazovanje Orionidov]
{{Meteorski roji}}
[[Kategorija:Meteorski roji]]