IOAA 2026 Singapore Guide: SAO Results, Selection and Dates
Confirmed Singapore Astronomy Olympiad 2026 results, the top-five IOAA route, and the Hanoi dates and preparation scope for IOAA 2026.
Q: How were Singapore's IOAA 2026 representatives selected? A: Astronomy.SG states that the top five students from SAO 2026 are invited to represent Singapore at the 19th IOAA in Hanoi, subject to the stated citizenship or permanent-residency rule. SAO results are already published, and IOAA 2026 is scheduled for 25 September to 5 October 2026.
Current 2026 status
The 13th Singapore Astronomy Olympiad is complete. Astronomy.SG reports a record 262 participants and has published the prize-winner list through its Hall of Fame.
The official SAO page states that the top five students are invited to represent Singapore at IOAA 2026 in Hanoi, Vietnam. It also says that only Singapore citizens and permanent residents are eligible to represent the country under the international organiser's rule.
An earlier version of this guide added an unverified training and final-selection pipeline after SAO. The current official page gives a direct top-five invitation statement, so that is the fact used here.
SAO 2026 format
| Stage | Date | Published format |
| Round 1 | 9 March 2026 | Two-hour computerised quiz with 50 multiple-choice questions |
| Round 2 | 14 March 2026 | Invitation only; detailed tasks sent to finalists |
The same page's general format section describes a two-hour Round 1 and a four-hour Round 2 containing short and long answers, data analysis, and practical or observational astronomy. For future cycles, follow the year's administrative section if it differs from the general overview.
IOAA 2026
The 19th IOAA is scheduled in Hanoi from 25 September to 5 October 2026. It had not begun when this page was checked on 26 August.
IOAA tests astronomy and astrophysics through theoretical, data-analysis, and observational work. Use the current