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IOTA/ES - Call for Observations

International Occultation Timing Association / European Section e.V.

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Upcoming Occultations

2026 Aug 19 ~01:35 UT: (27389) 2000 EY86 occults TYC 0616-00639-1 (8.0 mag) 2026 Aug 19 ~01:00 UT: (27559) 2000 JB66 occults HIP 104616 (8.2 mag) 2026 Aug 17 ~22:54 UT: (27644) 1343 T-2 occults TYC 6879-02447-1 (8.4 mag) 2026 Aug 16 ~03:36 UT: (19898) 1177 T-3 occults J235147.90+090323.0 (7.1 mag) 2026 Aug 13 ~23:37 UT: (476) Hedwig occults UCAC4 448-136900 (13.5 mag)
Main-Belt Asteroids Upcoming Occultation

2026 Aug 19 ~01:35 UT: (27389) 2000 EY86 occults TYC 0616-00639-1 (8.0 mag)

2026-07-26
Main-Belt Asteroids Upcoming Occultation

2026 Aug 19 ~01:00 UT: (27559) 2000 JB66 occults HIP 104616 (8.2 mag)

2026-07-26
Main-Belt Asteroids Upcoming Occultation

2026 Aug 17 ~22:54 UT: (27644) 1343 T-2 occults TYC 6879-02447-1 (8.4 mag)

2026-07-26
Main-Belt Asteroids Upcoming Occultation

2026 Aug 16 ~03:36 UT: (19898) 1177 T-3 occults J235147.90+090323.0 (7.1 mag)

2026-07-26
Main-Belt Asteroids Suspected binary asteroids - GaiaMoons project Upcoming Occultation

2026 Aug 13 ~23:37 UT: (476) Hedwig occults UCAC4 448-136900 (13.5 mag)

2026-07-26
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  • Past Events
2026 Aug 30 ~20:38 UT: (47481) 2000 AR12 occults UCAC4 308-235846 (8.4 mag)
Main-Belt Asteroids
2026 Aug 30 ~20:38 UT: (47481) 2000 AR12 occults UCAC4 308-235846 (8.4 mag)
2026 Aug 30 ~04:18 UT: (2193) Jackson occults UCAC4 447-001586 (12.9 mag)
Main-Belt Asteroids Suspected binary asteroids - GaiaMoons project
2026 Aug 30 ~04:18 UT: (2193) Jackson occults UCAC4 447-001586 (12.9 mag)
2026 Aug 28 ~21:36 UT: (853) Nasenia occults UCAC4 489-001612 (12.4 mag)
Main-Belt Asteroids Suspected binary asteroids - GaiaMoons project
2026 Aug 28 ~21:36 UT: (853) Nasenia occults UCAC4 489-001612 (12.4 mag)
2026 Aug 26 ~23:32 UT: (29949) 1999 JM85 occults HIP 301 (2 Cet) (4.5 mag)
Main-Belt Asteroids
2026 Aug 26 ~23:32 UT: (29949) 1999 JM85 occults HIP 301 (2 Cet) (4.5 mag)
2026 Aug 30 ~20:38 UT: (47481) 2000 AR12 occults UCAC4 308-235846 (8.4 mag)
Main-Belt Asteroids
2026 Aug 30 ~20:38 UT: (47481) 2000 AR12 occults UCAC4 308-235846 (8.4 mag)
2026 Aug 16 ~03:36 UT: (19898) 1177 T-3 occults J235147.90+090323.0 (7.1 mag)
Main-Belt Asteroids Upcoming Occultation
2026 Aug 16 ~03:36 UT: (19898) 1177 T-3 occults J235147.90+090323.0 (7.1 mag)
2026 Aug 17 ~22:54 UT: (27644) 1343 T-2 occults TYC 6879-02447-1 (8.4 mag)
Main-Belt Asteroids Upcoming Occultation
2026 Aug 17 ~22:54 UT: (27644) 1343 T-2 occults TYC 6879-02447-1 (8.4 mag)
2026 Aug 19 ~01:00 UT: (27559) 2000 JB66 occults HIP 104616 (8.2 mag)
Main-Belt Asteroids Upcoming Occultation
2026 Aug 19 ~01:00 UT: (27559) 2000 JB66 occults HIP 104616 (8.2 mag)
2026 Aug 04 ~23:08 UT: (24049) 1999 TZ18 occults HIP 89893 (7.7 mag)
Main-Belt Asteroids Past Event Suspected binary asteroids - GaiaMoons project
2026 Aug 04 ~23:08 UT: (24049) 1999 TZ18 occults HIP 89893 (7.7 mag)
2026 Aug 04 ~22:45 UT: (9943) Bizan occults TYC 86831-00096-1 (9.0 mag)
Main-Belt Asteroids Past Event
2026 Aug 04 ~22:45 UT: (9943) Bizan occults TYC 86831-00096-1 (9.0 mag)
2026 Aug 04 ~01:57 UT: (6359) Dubini occults UCAC4 337-203380 (12.0 mag)
Main-Belt Asteroids Past Event Suspected binary asteroids - GaiaMoons project
2026 Aug 04 ~01:57 UT: (6359) Dubini occults UCAC4 337-203380 (12.0 mag)
2026 Aug 02 ~22:37 UT: (6950) Simonek occults UCAC4 298-179083 (13.8 mag)
Main-Belt Asteroids Past Event Suspected binary asteroids - GaiaMoons project
2026 Aug 02 ~22:37 UT: (6950) Simonek occults UCAC4 298-179083 (13.8 mag)
Main-Belt Asteroids Suspected binary asteroids - GaiaMoons project Upcoming Occultation

2026 Aug 13 ~23:37 UT: (476) Hedwig occults UCAC4 448-136900 (13.5 mag)

2026-07-26

Binary asteroid! Faint star! Long max. duration of 11.6 s! Faint mag drop of only 0.22 mag! Last update: 2026 Jul 26, Occult Watcher Cloud: https://cloud.occultwatcher.net/event/2050-476-309297-647980-U136900 GAIAMOONS: https://gaiamoons.imcce.fr/occ.php?p=103420

Main-Belt Asteroids Upcoming Occultation

2026 Aug 16 ~03:36 UT: (19898) 1177 T-3 occults J235147.90+090323.0 (7.1 mag)

2026-07-26

Bright star! Annular occultation! Apparent star diameter: 8.7 mas, asteroid: 4.4 mas. Faint mag drop of only 0.31 mag! Last update: 2026 Jul 26, Occult Watcher Cloud: https://cloud.occultwatcher.net/event/2053-19898-337686-648578-J4790230

Main-Belt Asteroids Upcoming Occultation

2026 Aug 17 ~22:54 UT: (27644) 1343 T-2 occults TYC 6879-02447-1 (8.4 mag)

2026-07-26

Bright star! Short max. duration of only 0.53 s! Last update: 2026 Jul 26, Occult Watcher Cloud: https://cloud.occultwatcher.net/event/2054-27644-273407-646365-T02447-1

Main-Belt Asteroids Upcoming Occultation

2026 Aug 19 ~01:00 UT: (27559) 2000 JB66 occults HIP 104616 (8.2 mag)

2026-07-26

Bright star! Last update: 2026 Jul 26, Occult Watcher Cloud: https://cloud.occultwatcher.net/event/2056-27559-299934-647925-H104616

Main-Belt Asteroids Upcoming Occultation

2026 Aug 19 ~01:35 UT: (27389) 2000 EY86 occults TYC 0616-00639-1 (8.0 mag)

2026-07-26

Bright star! Last update: 2026 Jul 26, Occult Watcher Cloud: https://cloud.occultwatcher.net/event/2056-27389-19487-648758-T00639-1

Main-Belt Asteroids

2026 Aug 19 ~23:18 UT: (2412) Wil occults TYC 1765-00865-1 (8.6 mag)

2026-07-26

Bright star! Last update: 2026 Jul 26, Occult Watcher Cloud: https://cloud.occultwatcher.net/event/2056-2412-32813-649432-T00865-1

Jupiter Trojans - predicted by the ERC Lucky Star project

2026 Aug 20 ~01:26 UT: (1867) Deiphobus occults UCAC4 628-026984 (15.1 mag)

2026-07-26

Jupiter Trojan! Asteroid has a satellite! Very faint star! Last update: 2026 Jul 26, Occult Watcher Cloud: https://cloud.occultwatcher.net/event/2057-1867-80790-650235-U026984 Prediction of the Lucky Star project (2025 Aug 21): https://lesia.obspm.fr/lucky-star/occ.php?p=155711

Main-Belt Asteroids

2026 Aug 21 ~01:30 UT: (7419) 1991 PN13 occults TYC 1765-00130-1 (7.9 mag)

2026-08-02

Bright star! Short max. duration of only 0.76 s! Last update: 2026 Aug 02, Occult Watcher Cloud: https://cloud.occultwatcher.net/event/2058-7419-32056-649537-T00130-1

Main-Belt Asteroids Suspected binary asteroids - GaiaMoons project

2026 Aug 21 ~20:35 UT: (249603) 1999 FO3 occults UCAC4 476-075863 (13.5 mag)

2026-08-02

Supected binary asteroid! Faint star! Short max. duration of only 0.35 s! Last update: 2026 Aug 02, Occult Watcher Cloud: https://cloud.occultwatcher.net/event/2058-249603-257808-648316-U075863 GAIAMOONS: https://gaiamoons.imcce.fr/occ.php?p=87967

Flyby target of a spacecraft Jupiter Trojans - predicted by the ERC Lucky Star project Special Event

2026 Aug 23 ~02:30 UT: (617) Patroclus occults UCAC4 616-022201 (15.4 mag)

2026-08-02

Binary Jupiter Trojan! Target of NASA’s Lucy mission! Very faint star! Last update: 2026 Aug 02 Occult Watcher Cloud: https://cloud.occultwatcher.net/event/2060-617-77041-650084-U022201 Prediction Lucky Star project (2026 Jan 12) for Patroclus: https://lesia.obspm.fr/lucky-star/occ.php?p=173473…

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IOTA/ES - Call for Observations

International Occultation Timing Association / European Section e.V.

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