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IOTA/ES - Call for Observations

International Occultation Timing Association / European Section e.V.

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Upcoming Occultations

2026 Jun 17 ~21:05 UT: (19698) 1999 SR4 occults HIP 91796 (8.1 mag) 2026 Jun 16 ~21:03 UT: (65803) Didymos occults UCAC4 337-081684 (10.9 mag) 2026 Jun 14 ~22:29 UT: (95802) Francismuir occults UCAC4 340-112572 (12.5 mag) 2026 Jun 14 ~00:57 UT: (3383) Koyama occults HIP 85418 (8.1 mag) 2026 Jun 13 ~23:06 UT: (269) Justitia occults UCAC4 411-059785 (14.7 mag)
Main-Belt Asteroids Upcoming Occultation

2026 Jun 17 ~21:05 UT: (19698) 1999 SR4 occults HIP 91796 (8.1 mag)

2026-06-06
Flyby target of a spacecraft Near Earth Asteroids - Call for Observations by the ACROSS Team Special Event Upcoming Occultation

2026 Jun 16 ~21:03 UT: (65803) Didymos occults UCAC4 337-081684 (10.9 mag)

2026-05-25
Main-Belt Asteroids Near Earth Asteroids - Call for Observations by the ACROSS Team Upcoming Occultation

2026 Jun 14 ~22:29 UT: (95802) Francismuir occults UCAC4 340-112572 (12.5 mag)

2026-05-25
Main-Belt Asteroids Upcoming Occultation

2026 Jun 14 ~00:57 UT: (3383) Koyama occults HIP 85418 (8.1 mag)

2026-05-25
Main-Belt Asteroids Observation Campaign for Slow Rotators Upcoming Occultation

2026 Jun 13 ~23:06 UT: (269) Justitia occults UCAC4 411-059785 (14.7 mag)

2026-05-25
  • New Predictions
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  • Past Events
2026 Jun 21 ~21:30 UT: (13517) 1990 UU1 occults HIP 92466 (7.5 mag)
Main-Belt Asteroids
2026 Jun 21 ~21:30 UT: (13517) 1990 UU1 occults HIP 92466 (7.5 mag)
2026 Jun 21 ~00:53 UT: (50000) Quaoar occults UCAC4 377-136950 (14.7 mag)
Trans-Neptunian Objects, Cubewanos and Centaurs - Predicted by the ERC Lucky Star project
2026 Jun 21 ~00:53 UT: (50000) Quaoar occults UCAC4 377-136950 (14.7 mag)
2026 Jun 21 ~00:23 UT: (28978) Ixion occults UCAC4 288-196042 (15.4 mag)
Trans-Neptunian Objects, Cubewanos and Centaurs - Predicted by the ERC Lucky Star project
2026 Jun 21 ~00:23 UT: (28978) Ixion occults UCAC4 288-196042 (15.4 mag)
2026 Jun 17 ~21:05 UT: (19698) 1999 SR4 occults HIP 91796 (8.1 mag)
Main-Belt Asteroids Upcoming Occultation
2026 Jun 17 ~21:05 UT: (19698) 1999 SR4 occults HIP 91796 (8.1 mag)
2026 Jun 21 ~21:30 UT: (13517) 1990 UU1 occults HIP 92466 (7.5 mag)
Main-Belt Asteroids
2026 Jun 21 ~21:30 UT: (13517) 1990 UU1 occults HIP 92466 (7.5 mag)
2026 Jun 14 ~00:57 UT: (3383) Koyama occults HIP 85418 (8.1 mag)
Main-Belt Asteroids Upcoming Occultation
2026 Jun 14 ~00:57 UT: (3383) Koyama occults HIP 85418 (8.1 mag)
2026 Jun 14 ~22:29 UT: (95802) Francismuir occults UCAC4 340-112572 (12.5 mag)
Main-Belt Asteroids Near Earth Asteroids - Call for Observations by the ACROSS Team Upcoming Occultation
2026 Jun 14 ~22:29 UT: (95802) Francismuir occults UCAC4 340-112572 (12.5 mag)
2026 Jun 16 ~21:03 UT: (65803) Didymos occults UCAC4 337-081684 (10.9 mag)
Flyby target of a spacecraft Near Earth Asteroids - Call for Observations by the ACROSS Team Special Event Upcoming Occultation
2026 Jun 16 ~21:03 UT: (65803) Didymos occults UCAC4 337-081684 (10.9 mag)
2026 Jun 12 ~00:07 UT: (19093) 1979 MM3 occults TYC 1443-00579-1 (8.8 mag)
Main-Belt Asteroids Past Event
2026 Jun 12 ~00:07 UT: (19093) 1979 MM3 occults TYC 1443-00579-1 (8.8 mag)
2026 Jun 11 ~21:28 UT: (24401) 2000 AS192 occults UCAC4 438-069012 (8.6 mag)
Main-Belt Asteroids Past Event
2026 Jun 11 ~21:28 UT: (24401) 2000 AS192 occults UCAC4 438-069012 (8.6 mag)
2026 Jun 11 ~03:22 UT: (470309) 2007 JK43 occults TYC 1584-01069-1 (10.9 mag)
Past Event Trans-Neptunian Objects, Cubewanos and Centaurs - Predicted by the ERC Lucky Star project
2026 Jun 11 ~03:22 UT: (470309) 2007 JK43 occults TYC 1584-01069-1 (10.9 mag)
2026 Jun 08 ~01:43 UT: (16393) 1981 QS occults UCAC4 372-118408 (12.3 mag)
Main-Belt Asteroids Past Event Suspected binary asteroids - GaiaMoons project
2026 Jun 08 ~01:43 UT: (16393) 1981 QS occults UCAC4 372-118408 (12.3 mag)
Main-Belt Asteroids Observation Campaign for Slow Rotators Upcoming Occultation

2026 Jun 13 ~23:06 UT: (269) Justitia occults UCAC4 411-059785 (14.7 mag)

2026-05-25

Slow-rotating asteroid! Faint star! Last update: 2026 May 25, Occult Watcher Cloud: https://cloud.occultwatcher.net/event/1989-269-215004-647503-U059785

Main-Belt Asteroids Upcoming Occultation

2026 Jun 14 ~00:57 UT: (3383) Koyama occults HIP 85418 (8.1 mag)

2026-05-25

Bright star! Last update: 2026 May 25, Occult Watcher Cloud: https://cloud.occultwatcher.net/event/1990-3383-247092-647848-H85418

Main-Belt Asteroids Near Earth Asteroids - Call for Observations by the ACROSS Team Upcoming Occultation

2026 Jun 14 ~22:29 UT: (95802) Francismuir occults UCAC4 340-112572 (12.5 mag)

2026-05-25

Short max. duration of only 0.31 s! Last update: 2026 May 25, Occult Watcher Cloud: https://cloud.occultwatcher.net/event/1990-95802-252157-646610-U112572

Flyby target of a spacecraft Near Earth Asteroids - Call for Observations by the ACROSS Team Special Event Upcoming Occultation

2026 Jun 16 ~21:03 UT: (65803) Didymos occults UCAC4 337-081684 (10.9 mag)

2026-05-25

Apollo asteroid! Target of the DART and HERA missions! Extreme short max. duration of only 0.07 s! Last update: 2026 May 25, Occult Watcher Cloud: https://cloud.occultwatcher.net/event/1992-65803-235029-646569-U081684

Main-Belt Asteroids Upcoming Occultation

2026 Jun 17 ~21:05 UT: (19698) 1999 SR4 occults HIP 91796 (8.1 mag)

2026-06-06

Bright star! Short max. duration of only 0.75 s! Last update: 2026 Jun 06, Occult Watcher Cloud: https://cloud.occultwatcher.net/event/1993-19698-264963-647425-H91796

Trans-Neptunian Objects, Cubewanos and Centaurs - Predicted by the ERC Lucky Star project

2026 Jun 21 ~00:23 UT: (28978) Ixion occults UCAC4 288-196042 (15.4 mag)

2026-06-06

TNO! Very faint star! Long max. duration of 27 s! Extended error limits! Read about (28978) Ixion in Journal for Occultation Astronomy 2018-02: https://www.iota-es.de/JOA/JOA2018_2.pdf Last update: 2026 Jun 06, Occult…

Trans-Neptunian Objects, Cubewanos and Centaurs - Predicted by the ERC Lucky Star project

2026 Jun 21 ~00:53 UT: (50000) Quaoar occults UCAC4 377-136950 (14.7 mag)

2026-06-06

TNO! Asteroid has two rings and a satellite! Very faint star! Long max. duration of 46 s! Read about (50000) Quaoar in Journal for Occultation Astronomy 2020-01: https://www.iota-es.de/JOA/JOA2020_1.pdf Last update:…

Main-Belt Asteroids

2026 Jun 21 ~21:30 UT: (13517) 1990 UU1 occults HIP 92466 (7.5 mag)

2026-06-06

Bright star! Short max. duration of only 0.48 s! Last update: 2026 Jun 06, Occult Watcher Cloud: https://cloud.occultwatcher.net/event/1997-13517-266730-647979-H92466

IOTA/ES - Call for Observations

International Occultation Timing Association / European Section e.V.

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