Friday, 18 January 2013

Lecture, ISS, Near miss! IAA @ Bangor, Schoolgirls' TNO, Oldest star, Stran, GSP

Hi all,
 
1.  IAA LECTURE: The next IAA public lecture will be on Wednesday 23 January, at 7.30 p.m. It will be given by Dr Tolis Christou, of Armagh Observatory. It has the intriguing title "Horseshoes, Tadpoles, and other weirdnesses: Asteroids and Planets Learning to Live Together". That should pique your curiosity! The only clue I'll give is that Tolis is an expert on the orbits and interactions of all the objects in the Solar System. and   Admission is free, including light refreshments, and all are welcome.
This lecture will as usual be in the Bell Lecture theatre, Physics building, main QUB Campus.
 
2. ISS. The International Space Station is doing another series of morning passes over Ireland. Details as usual on the excellent and free site: www.heavens-above.com
 
3. Asteroid Very Near Miss: On Feb 15 we will have a very near miss from a 'Near Earth Asteroid', which will come so close to Earth that it will pass inside the orbits of the geostationary satellites! Asteroid 2012 DA14, which is about 50m (165 feet) in diameter will pass about 21,000 miles from the centre of the Earth, or about 17,000 miles above the surface. There is no risk of a collision, but if an object of this size did hit the Earth, the damage would be very significant. 17,000 miles seems like a significant distance, but think of it this way: It's just over twice the diameter of the Earth. If a bullet was to miss your head by just twice your head's diameter, you would think that you had been very very lucky! It will be travelling at 7.8km/sec.
   Closest approach will be at about 18.00, and the object should be visible in binoculars as it speeds past the Earth, with a maximum magnitude of between 7 and 7.5. Since it will be so close, and moving so fast, predictions need to be based on your own location, not geocentric. I'm very grateful to Dr Tolis Christou of Armagh Observatory who has generated an ephemeris for Belfast, giving the RA, Dec, Azimuth, Elevation and magnitude of 2012 DA14 from Belfast ( 54.6000° N, 5.9167° W) for the night of the 15th to the 16th of February 2013 every 5 min. The asteroid rises at 20:00 UT in Virgo, and will move rapidly Northwards through Coma, Canes Venatici, Ursa Major and Draco during its period of best visibility from here. It will remain brighter than mag 10 until 22:20 UT. At that time its altitude is 53 deg.

   This ephemeris is too long and detailed to include here, but I will forward the details to anyone on request. It should be possible to record its motion with a time exposure on a digital camera with a reasonable zoom lens, and set to a high ISO setting.

   This will be the brightest-ever NEO to be observed approaching the vicinity of our planet (<0.1 AU). It is predicted to be 30 times brighter and more than 150 times more massive than the next largest object to approach as close or closer to our planet in recent years and to be discovered: that one was 2012 MD. 

    If you want to see what 'Armageddon' might look like before impact if one of this size was going to hit us, then have a look!

 
4. IAA Event at Bangor, 16 February. The IAA will be running another of its very popular astronomy evenings, this time at a new venue: the North Down Heritage Centre near Bangor Castle, Co Down. This is not a dark sky location, but we have chosen an evening when both Jupiter and a nice 6-day old Moon will be visible, so there will be spectacular sights for public viewing. There will also be a good pass of the ISS, which should please anyone who hasn't seen it before.
    We will of course have the Stardome shows, which will run whether it's cloudy or clear, and the usual exhibition of telescopes, binoculars, meteorites and other items. Our own local Ulsternaut, Derek Heatly, will be giving an update on the latest details for his flight into space with Virgin Galactic.
   Location: Bangor Castle, Castle Park. The Heritage Centre is just behind (South of) the Castle. Access is via Castlepark Avenue and Castlepark Road, or on foot via the Castle grounds by continuing along Castlepark Avenue. GPS: 54deg 39' 21" N; 5 deg 40' 09" W. Tel. 028 9127 1200.
   Provisional start time is 7.30 p.m. - tbc. 
 
5. Bangor schoolgirls discover TNO! A class of schoolgirls, led by teacher and former IAA Secretary Mrs Jacquie Milligan, has discovered a Trans Neptunian Object using the Faulkes Telescope South at Siding Springs (before the bushfires caused some damage at the site). The object was magnitude 19.5 in the R Band, and lies in SE Cetus. Congratulations to Jacquie and the girls!
 
6.  Astronomers have discovered the oldest known star.
It's thought to be 13.2 billion years old, and lies in Libra, mag 7.2. It is variously known as HD 140283, SAO 159459, TYC 5601-694-1, HIP 76976. Spectrum is sdF3, and distance approx 187 LY. The luminosity is estimated at 3.51 that of the Sun. The coordinates of today's date are: RA 15h 43m 45.35s; Dec -10 deg 58' 30.2". In 2000.0 co-ordinates it's at RA 15h 43m 03.1s; Dec -10deg 56' 00.6". It lies about 6.5 degrees ESE of Beta Librae. It's visible in binoculars, so have a look. Can you comprehend that you are looking at something 13.2 billion years old? See:
 
7. ASTRONOMY COURSE at STRANMILLIS COLLEGE, BELFAST. I will be delivering a two part course, introduction to astronomy, as follows:

Astronomy:  Our place in the Universe

Looking to the sky for the first time you may feel overwhelmed and confused by the spectacle of thousands of stars above your head.  Astronomy is a great gateway science that can inspire you to do great things!  Participants will gain enjoyment from exploring the wonders of the night sky.  The topics covered include Greek mythology, Egyptian and Babylonian cosmology, Astrobiology, Quantum Physics, Terrestrial and Jovian planets and Solar System to help us understand our place in the cosmos.  This is a great way for the community to come together and take a fresh look at our night sky.....it belongs to us all.  No experience necessary and questions encouraged! 

Tutor:             Terry Moseley, Time:              7.00pm - 9.00pm

Session 1:         Tuesdays, 5 weeks; dates:      19th February 2013 – 19th March 2013 

Location:        Central Building.

Session 2:         Tuesdays, 5 weeks. Time: 7.00pm - 9.00pm. Dates:      9th April 2013 – 7th May 2013.   Location:        Central Building

There will also be a daytime visit to Armagh Observatory and Planetarium, provisionally on 17 May.

Full details and booking at:  http://www.stran.ac.uk/informationabout/courses/professionaldevelopmentlifelonglearning/

8. Galway Star Party: UPDATE: NB if you are going to this event, you are advised to book accommodation soon, as the Galway Rally will be on the same weekend.
The 10th Galway Starparty: "Ireland, the Final Frontier" takes place on Saturday, 2nd February, 2013 at the Westwood House Hotel, Galway City.
The speakers include:
Dr. Andy Shearer (Centre for Astronomy, NUIG): "Kepler: The Search for Habitable Planets"
Dave Gradwell: "OSCAR: A unique Irish Solar Observatory"
Ronan Newman (workshop): "Celestial Light: Chasing the Elusive Irish Aurora"
John Flannery (South Dublin AS): "What makes a Great Comet?"
Prof. Tom Ray (DIAS): "Making Stars and Planets: The First Three Billion Years"
Dave Grennan: "Hunting Extra-Galactic Supernovae from Ireland"
Terry Moseley (IAA): "Untold Stories of Sir Patrick Moore, FRS" (Celebrating his 90th Birthday)
Professor Lorraine O'Hanlon (UCD) "The GLORIA project"
Details & bookings at: http://galwayastronomyclub.ie/
 
9. GALILEO AT ARMAGH OBSERVATORY:THE LIFE OF GALILEO", by Bertolt Brecht, Performed in the Armagh Observatory.
   The Greenwood Players and the Armagh Observatory are presenting in the Armagh Observatory from 22nd to 24th February 2013 the first performance on the island of Ireland of the play "The Life of Galileo" by Bertolt Brecht in a new version by David Hare.
   The story of the Life of Galileo and its central drama of the conflict between science, religion and authority is one that resonates today. As remarked by Ian McDonald, author and Executive Producer with the Greenwood Players, "The Life of Galileo" is a story that needs retelling every generation, especially in a 21st century when we seem to be moving away from science to an authority and belief-based worldview.
   There will be five performances of the play: two matinees at 2.00pm on Saturday 23rd and Sunday 24th February, and three evening performances at 7.00pm on each of 22nd, 23rd and 24th February.  Tickets, which are strictly limited, cost 12 pounds and are available from 14th January 2013 at http://galileoattheobservatory.eventbrite.co.uk/.
For more information, see: http://star.arm.ac.uk/press/2013/galileo/
 
10. INTERESTING WEBLINKS: 
  
11. TWITTER: Follow the IAA on Twitter:  @IaaAstro


12. BBC THINGS TO DO WEBSITE: See the forthcoming IAA events on  
http://www.bbc.co.uk/thingstodo. Look under 'Countryfile'.
 
13. JOINING the IRISH ASTRONOMICAL ASSOCIATION is easy: This link downloads a Word document to join the IAA. http://irishastro.org.uk/iaamembership.doc. If you are a UK taxpayer, please tick the 'gift-aid' box, as that enables us to reclaim the standard rate of tax on your subscription, at no cost to you.  See also www.irishastro.org
  
Clear skies,
Terry Moseley

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