K-Tec

NLC's: How far south?

  • Conor
  • Conor's Avatar Topic Author
  • Offline
  • Main Sequence
  • Main Sequence
  • Posts: 461
  • Thank you received: 0

NLC's: How far south? was created by Conor

Have you seen NLC's?

Im just wondering how far south affects seeing NLC's. I know a small distance can affect seeing an Aurora or not. Just curious if this is the same with NLC's?
Moderator of Photography Forum:

www.freeimagebrowser.com/gallery/index.php
15 years 11 months ago #28557

Please Log in or Create an account to join the conversation.

  • Posts: 9637
  • Thank you received: 544

Replied by Seanie_Morris on topic Re: NLC's: How far south?

NLC's can happen, literally, anywhere Conor. But, like aurora, they are localised. I can't remember what the distances are like, but if one person spots an NLC display in e.g. Cork, chances are the same display will not be seen in Inishowen.
Midlands Astronomy Club.
Radio Presenter (Midlands 103), Space Enthusiast, Astronomy Outreach Co-ordinator.
Former IFAS Chairperson and Secretary.
15 years 11 months ago #28559

Please Log in or Create an account to join the conversation.

  • Conor
  • Conor's Avatar Topic Author
  • Offline
  • Main Sequence
  • Main Sequence
  • Posts: 461
  • Thank you received: 0

Replied by Conor on topic Re: NLC's: How far south?

Awrite. Yea i mind the Oct Aurora we were seeing many different beams... from someone else about 30miles away. Mmm i wonder which is higher Auroras of NLC's
Moderator of Photography Forum:

www.freeimagebrowser.com/gallery/index.php
15 years 11 months ago #28563

Please Log in or Create an account to join the conversation.

  • Posts: 9637
  • Thank you received: 544

Replied by Seanie_Morris on topic Re: NLC's: How far south?

Aurorae are higher up, as ts within the magnetic field, but on the edge of the particle atmosphere they are created in.

NLC's depend upon ice and dust in their formation. They are (almost?) the highest forming anything to naturally occur in Earths atmosphere.
Midlands Astronomy Club.
Radio Presenter (Midlands 103), Space Enthusiast, Astronomy Outreach Co-ordinator.
Former IFAS Chairperson and Secretary.
15 years 11 months ago #28566

Please Log in or Create an account to join the conversation.

  • Conor
  • Conor's Avatar Topic Author
  • Offline
  • Main Sequence
  • Main Sequence
  • Posts: 461
  • Thank you received: 0

Replied by Conor on topic Re: NLC's: How far south?

Yea true. Whats the highest?
Moderator of Photography Forum:

www.freeimagebrowser.com/gallery/index.php
15 years 11 months ago #28568

Please Log in or Create an account to join the conversation.

  • Posts: 4173
  • Thank you received: 181

Replied by albertw on topic Re: NLC's: How far south?

They are sunlit so you'll need to be in the 50-60 degree latitudes or there abouts to see them. Any further south and they'll be below the horizon, much further north and it'll be too bright to see them. (similarly for southern obervers). Like Seanie said, they happen everywhere, but only under certain circumstances can you see them.

iirc they are an artifact in the mesosphere which is around 70km up. so they should be reasonably localised. Someone else can do the maths :-)

I've gotten several texts from an observer in Galway to say there were NLC's visible, but only on one occasion did I see them at the same time. I'd have expected to see them the same time as Galway would since we (Dublin) are at similar latitudes.

Cheers,
~Al
Albert White MSc FRAS
Chairperson, International Dark Sky Association - Irish Section
www.darksky.ie/
15 years 11 months ago #28569

Please Log in or Create an account to join the conversation.

  • Posts: 392
  • Thank you received: 2

Replied by mjs on topic Re: NLC's: How far south?

If you look at the post www.irishastronomy.org/boards/viewtopic.php?p=28580#28580 , I think that all the images were taken of the same display on July 7th 2004? I know that Dave's image was taken on the same night from Limerick as my panoamma image further down the page, (maybe Keith and Albert could confirm?)

But from the images it is easy to see the difference that location and time makes. My images were taken at 23:30BST and the displat was all but gone by 0:15BST.
15 years 11 months ago #28584

Please Log in or Create an account to join the conversation.

  • Conor
  • Conor's Avatar Topic Author
  • Offline
  • Main Sequence
  • Main Sequence
  • Posts: 461
  • Thank you received: 0

Replied by Conor on topic Re: NLC's: How far south?

Excellent image!!
Moderator of Photography Forum:

www.freeimagebrowser.com/gallery/index.php
15 years 11 months ago #28586

Please Log in or Create an account to join the conversation.

Time to create page: 0.052 seconds
Powered by Kunena Forum