Orwell Park Mansion and Observatory
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OASI is a society for people interested in astronomy. We are based at Orwell Park Observatory and Newbourne Village Hall, both situated near Ipswich, Suffolk. Members enjoy a wide range of interests in astronomy and include armchair astronomers, casual observers, and dedicated amateurs with specialist skills in visual and photographic observing, constructing telescopes, public education in astronomy and the history of astronomy.

Email for more information: info@oasi.org.uk



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Night Sky Notes

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Observatory Visits


Visit Orwell Park Observatory and see the historic Tomline Refractor.


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Fri 31 May 2024, 20:00, Zoom, Committee meeting. To be held via Zoom. All members are invited to attend.

Wed 05 Jun 2024, 20:15, Orwell Park Observatory, General observing for members of OASI.

Sat 08 Jun 2024, 10:00-16:00, Christchurch Park, outside the entrance to the mansion, Observing the sun safely. Booking not necessary.

Mon 10 Jun 2024, 19:30, Newbourne Village Hall, Newbourne meeting - beginners and new members welcome!

Full events list, with contact details for further information.


Recent activities and observations

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[1/12]   Resembling the "W" of Cassiopeia, star cluster Kemble 2 is also known as "Mini Cassiopeia". It is located in the constellation Draco, approximately 1° SE of χ Dra. The asterism was named by the Franciscan friar and amateur astronomer, Father Lucian Kemble, in August 1994. 19-20 May 2024. John Hughes. More.
[2/12]   OASI's first event to mark the 150th anniversary of Orwell Park Observatory was to host the BAA Historical Section meeting on 18 May 2024 in Ipswich. Following the meeting, several members of the BAA and OASI visited the house and grave of Sir George Biddell Airy (1801-1892), 7th Astronomer Royal, in Playford, north of Ipswich.
[3/12]   The solar disk in Hα light shows numerous limb prominences, including a large ejection of material from active region AR13664 (on the solar limb, lower right). 13 May 2024. Martin Cook. More.
[4/12]   Evolution of a solar flare associated with active region AR13664. The flare was a class X3.98 event (very large!) Images captured in Hα light at 06:33, 06:56 and 07:00 UT follow the evolution of the flare from shortly after it erupted. 10 May 2024. John Hughes. More.
[5/12]   A geomagnetic storm caused an aurora to be visible widely over the UK on the night of 10 May 2024. Many members of OASI witnessed the phenomenon. Images (L-R, T-B): Andy Gibbs, Nigel Evans, Mike O'Mahony, John Hughes, Mike Such (montage), Martin Cook, Steve McElvanney, Toni Smith and Paul Whiting (courtesy of professinal photographer). More.
[6/12]   LHS: a sketch of the Sun. RHS: an image from the Helioseismic and Magnetic Imager (HMI) aboard the Solar Dynamics Observatory (SDO) for comparison. Note the large active region AR3664, responsible for the intense aurora later in the day of the sketch. 10 May 2024. Neil Morley. More.
[7/12]   The Daniel K Inouye Solar Telescope on the summit of Haleakala, Maui, Hawaii. Photographed on a sunset tour to the mountain. 20 April 2024. Neil J Short. More.
[8/12]   LHS: the Sun imaged in white light with a ZWO Seestar S50 "smart" telescope. The solar disk shows granulation, faculae and sunspots. RHS: solar image from Spaceweather.com enabling identification of sunspot groups. 17 April 2024. Stephen McElvanney. More.
[9/12]   The total solar eclipse of 08 April 2024, observed from Tiffin, Ohio. Neil J Short. More.
[10/12]   Measurements of the intensity of vertical light (LHS) and of the temperature in the shade (RHS) during the total solar eclipse of 08 April 2024, observed from Waco, Texas. Paul Whiting, FRAS. More.
[11/12]   Comet 12P/Pons-Brooks imaged with a Dwarf II "smart" telescope. The appearance of the comet has changed as it approaches perihelion, and it shows little evidence of the dark lane recorded eight months previously by another OASI observer. 22 March 2024. Michael Maran. More.
[12/12]   OASI's presence at the 2024 Norwich Science Festival attracted many visitors. 22 February 2024. Christina Nunn. More.