Neptune comes to opposition on 2nd September (at magnitude 7.8) in Aquarius. The planet will then be 1.3° SW of the mag 3.7 star Lambda Aquarii.
As the disc is tiny (2.4"), it will appear star-like except under high power. Even in (steadily held) binoculars the planet should be visible.
Neptune was discovered 170 years ago by Johann Galle (assited by Louis d'Arrest), with predictions by Urbain Le Verrier.
Data from Sky-High 2016.
by Daniel Cussen
Monday September 26th 2016 (8 pm).
Venue: Ely House, 8 Ely Place, Dublin 2. Time: 8 pm. All welcome, free event.
This is our opening metting of the session
Image courtesy NASA.
Membership renewals are due from the 1st August 2016. Please see the applicable rates for this year.
Beginners may be interested in the astronomy course run by IAS member John Daly at the Malahide Community School. The 10 week course including topics such as planets of the solar system, galaxies, the lives of stars, a brief history of astronomy, advice on choosing a telescope, the latest happenings in space and much more.
More information and how to book. Also you can contact by phone on 01 8460949 or 086 8188783.
Note that this is not run by the IAS.
The IAS (with help from IFAS) has a very special touring exhibition to showcase the work of Irish backyard astronomers astrophotography. Splendid images of the Stars, the Galaxy and the Solar System are featured.
Our exhibition is showing at:
Linen Hall Library, Belfast: 2nd Aug-30th Sept 2016 (venue and some extra photos organised by the IAA).
The exhibition started in Botanic Gardens, Dublin last February and then went to Tullamore, Co Offaly and Tallaght, Co Dublin.
Our Exhibition will return to Dublin in October: Fitzgerald Building TCD from 5 Oct 2016.
Angela O'Connell reports:
A view of totality from the MS Volendam, on the starboard bow, mid-ship. We were located in the Makassar Strait between the islands of Borneo and Sulawesi, about 1½ degrees south of the equator. The sea was surprisingly calm and the ship was steady allowing those of us with tripods to relax and concentrate on the spectacle which lasted 2 min 46 sec approximately. Photo (at left) taken 08:34 (local time), 9th March 2016 with Lumix GM5 on automatic night scene setting.
Terry Moseley reports:
The solar corona during totality. Photo taken 08:36 (local time), 9th March 2016 with Canon Power Shot with x42 zoom.The next total solar eclipse occurs in August 2017, only touching land in USA.
We were treated to a fine total lunar eclipse.
The photo of the eclipse was taken by J. O'Neill, at 02.21 UT, with a 106 mm refractor at f/8. This was 10 min after the start of totality.
The next total lunar eclipse visible from Ireland occurs in July 2018.
Members please report any observations, drawings or photographs to our Director of Observations, Liam Smyth for inclusion in the next issue of Orbit.
In late May 2015, the comet passed about 1° from the pole star Polaris. Remarkably, it was still visible (as of 23 May) in binoculars, at just below mag 8. It was an excellent time to image the comet with a fixed camera, as trailing would be slight.
The photo (below) of the comet is by John O'Neill and was taken on 9-10 January 2015 (cropped; 200 mm camera lens). The drawing of 19 January 2015 is by Deirdre Kelleghan, with details appended.
Please report any observations, drawings or photographs to our Director of Observations, Liam Smyth.
2016 Sep 26 Talk in Ely House (by Daniel Cussen).
2016 Oct 7 Dublin Sidewalk Astronomy at Sandymount.
2016 Oct 8 Dublin Sidewalk Astronomy at Clontarf.
2016 Oct 24 Talk in Ely House (by John O'Neill).
Please see EVENTS/opposite for more details and further events.
If you would like to attend Dunsink Observatory Public Open Nights that are supported by the IAS, you can find more details at Dunsink Observatory. Note: these are over for the season and will recommence in October 2016.