The Observatório do Lago Alqueva, together with the Associação Portuguesa de Astrónomos Amadores (APAA), Associação Albireo and the Institute of Astrophysics and Space Sciences organize an Amateur Astronomers Meeting during the afternoon of the 2nd of April.

In this night takes place a Messier Marathon where we set ourselves to observe through the telescope the maximum possible number of galaxies, nebulae and open and globular clusters from the 110 objects belonging to the Messier catalog built by Charles Messier, the french astronomer of the 18th century.

Accommodation. There are several possibilities for accommodation in the vicinity of the observatory. See some of our recommendations here. It is also possible to camp in OLA’s field.

Vehicles with telescopes may enter the park of the observatory to the observation platforms until 21:00 on Saturday and can only leave after 2:00 on Sunday.

Entry to the meeting: 0€.

Entry to the marathon: without telescope 15€, 9€ (adult, youngster); with telescope 0€.


To register in the Marathon, please fill in this form.



16h00 Welcome – Pedro Ré e Nelson Nunes
16h15 O Universo ao alcance de todos – Catarina Leote
16h35 O contributo amador na Astronomia – João Gregório
16h55 Pequenos passos no Universo da instrumentação – Nuno Gonçalves
17h15 Astronomy at 41,000+ feet: The story of SOFIA Mission – Robert Brauer
17h35 Plan of the Messier Marathon (docs) – Pedro Ré

21h30 – 6h00 Messier Marathon

Consult the GuideMapData

If you have any questions, please contact the organization at geral @


Organization and support:



Data / Hora
Date(s) - 02/04/2022 - 03/04/2022
16:00 - 6:00


Map Unavailable