Event predictions

This page presents a selection of "best" events.  These are also available through the Occultation Portal. 

Please check Occult Watcher Cloud, for details and updates, in the specific feed of the ACROSS campaign.

Here below you can find predictions for events by:

• The asteroid (65 803) Didymos. This is the main target of ACROSS, and the target of the DART/Hera first planetary defence missions.
•  The 9 potential secondary targets of Hera (ESA) in the next 5 years: (29 886) Randytung, (42 532) 1995 OR, (54 212) 2000 HJ89, (88 992)  2001 TJ72, (95 802) Francismuir, (122 764) 2000 SX69, (169 549) 2002 EG105, (188  708) 2005 TR99 and (477 416) 2009 WW1. 

• NEAs with orbits that allow predictions with a decent probability of success, with a list of about 30 NEAs chosen according to their orbital quality (σ_a < 1e-9 au), size (D > 0.5 km) and presence in the Gaia DR3 database.

For each group, a table and images are published for the most accessible events in the following two months, and files with the full list of predicted events in XML format (produced by Occult) are shared at the end. It should be noted that, due to the low number of restrictions we apply in the XML files, they may have more than 20 000 events, in particular the general NEA files. 20 000 is the standard limit of events for Occult, as it claims that the processes involving a larger amount of events can slow down significantly. However, it is possible to raise this limit up to 100 000, the maximum Occult allows. To do that, it is necessary to enter the "Maintenance" section, choose "User Settings", go to "11. Asteroid occultations - Search and Display", where you can edit the limit. If necessary, the team can also provide smaller files upon request, for those who choose to keep this limit.

By accessible, we mean events with:

- Star Magnitude (Mv) <= 14.0;

- Maximum Duration (s) >= 0.2 (for the general NEA only);

- Path crosses significant amount of landmass on Earth's surface (not just oceans);

- Solar Elongation >= 45º;

- For the more general NEA events only, whether the path uncertainty is less than 5x the object's Diameter.

The tables have the essential information of each event: date, target asteroid's permanent number and name, target star's catalogue name and number, RA/Dec coordinates and Mv magnitude, and quantities related to the event, such as expected drop (in magnitudes), maximum duration (in seconds) and the general area of the globe where the event is visible. Also contained the Occu;t Map for every event. For the most promising Didymos events (red lines) and when requested by observers, the last column holds the .kmz file of the event with the predicted path and the topographic corrections applied.   

IMPORTANT: The .xml tables are only propagated once for the whole month for simplicity, while all the events displayed here and in OWC have been propagated to the date of occultation. So the maps in the xml and these images may not match perfectly. If you are insterested in observing an event not included in OWC or this website, please contact the ACROSS team, in order to have access to the most precise map we can get for it.

Interesting events in the near future

Didymos

 There are not any viable events by (65803) Didymos at the moment.  

Other Didymos events  for June-July in  XML format for Occult ( ~300 in total).

See dedicated page for the event on January 21-22, 2023 !

Potential Hera secondary Targets

 There are not any worth mentioning events by the potential Hera targets at the moment.

Other Hera events  for June-July in  XML format for Occult ( ~400 in total).

Other NEAs

Date	Asteroid		Star		RA			Dec			Conditions			Zone	Map
	Number	Name	Catalogue	Number	h	m	s	d	m	s	Mv	Drop	Duration
06/01/2025	162173	Ryugu	UCAC4	340-102410	17	36	21	-22	-2	-57	12.3	6.1	0.13	Australia
06/03/2025	162173	Ryugu	UCAC4	342-098188	17	32	49	-21	-42	0	12	6.3	0.14	South America
06/03/2025	162173	Ryugu	UCAC4	342-097746	17	31	58	-21	-36	-43	13.7	4.6	0.13	Australia
06/03/2025	162173	Ryugu	UCAC4	343-101520	17	31	27	-21	-33	-53	9.7	1.2	0.13	Australia
06/06/2025	162173	Ryugu	UCAC4	347-098024	17	23	43	-20	-47	-44	13.3	4.8	0.13	Africa
06/07/2025	162173	Ryugu	UCAC4	347-097610	17	23	11	-20	-44	-34	13.6	4.5	0.13	North America
06/07/2025	162173	Ryugu	UCAC4	347-096883	17	22	4	-20	-37	-28	13.2	4.9	0.13	Australia
06/07/2025	3752	Camillo	TYC	3942-01297-1	19	38	11	56	54	30	11.3	7.5	0.22	Japan
06/08/2025	162173	Ryugu	UCAC4	349-095110	17	19	19	-20	-20	-56	11.3	6.7	0.13	Australia
06/11/2025	162173	Ryugu	UCAC4	352-089039	17	12	15	-19	-37	-39	12.7	5.3	0.13	Australia
06/11/2025	162173	Ryugu	UCAC4	352-089306	17	12	50	-19	-41	-36	13.6	4.4	0.13	Japan
06/15/2025	162173	Ryugu	UCAC4	356-085424	17	4	34	-18	-50	-2	12.3	5.9	0.14	South America
06/16/2025	7341	1991 VK	UCAC4	315-164034	18	14	14	-27	-4	-51	13.4	1.4	0.11	Europe
06/16/2025	7341	1991 VK	UCAC4	315-163883	18	14	11	-27	-4	-46	12.2	8.3	0.07	South America
06/16/2025	162173	Ryugu	UCAC4	358-084625	17	2	13	-18	-35	-20	13.5	4.8	0.14	North America
06/20/2025	162173	Ryugu	UCAC4	362-078895	16	53	38	-17	-40	-19	12.8	5.8	0.15	North America
06/21/2025	162173	Ryugu	UCAC4	363-079792	16	52	21	-17	-31	-56	13.2	5.4	0.15	Europe
06/22/2025	162173	Ryugu	TYC	6222-00132-1	16	50	5	-17	-16	-42	10.4	8.3	0.15	South America
06/22/2025	7341	1991 VK	UCAC4	316-133834	18	4	59	-26	-58	-28	10.7	9.7	0.07	North America
06/24/2025	162173	Ryugu	UCAC4	366-076552	16	46	37	-16	-53	-32	9.4	9.4	0.16	South America
06/24/2025	3752	Camillo	UCAC4	733-062700	19	2	34	56	28	34	13.2	5.4	0.16	Japan
06/25/2025	162173	Ryugu	UCAC4	367-075628	16	45	15	-16	-44	-12	12.5	6.4	0.16	South America
06/26/2025	7341	1991 VK	UCAC4	316-125904	17	59	15	-26	-52	-38	11.8	8.7	0.08	South America
07/02/2025	2100	Ra-Shalom	UCAC4	791-016363	5	43	11	68	4	8	13.6	4.5	0.26	Europe
07/03/2025	2100	Ra-Shalom	UCAC4	792-016330	5	41	42	68	23	27	13.4	4.7	0.26	North America
07/06/2025	2100	Ra-Shalom	TYC	4351-00936-1	5	22	5	71	49	44	10.8	7	0.27	Europe
07/07/2025	2100	Ra-Shalom	UCAC4	810-014324	5	21	5	71	59	5	13.6	4.1	0.27	Europe
07/07/2025	3752	Camillo	UCAC4	719-059556	18	31	59	53	36	22	13.5	5.1	0.13	Europe
07/08/2025	2100	Ra-Shalom	UCAC4	817-011637	5	11	47	73	13	4	13.3	4.3	0.28	North America
07/12/2025	2100	Ra-Shalom	UCAC4	838-006406	4	23	20	77	26	31	13.7	3.5	0.28	Europe
07/15/2025	2100	Ra-Shalom	UCAC4	850-004242	3	30	22	79	49	27	13.3	3.6	0.28	Europe
07/17/2025	2100	Ra-Shalom	UCAC4	854-003223	2	58	19	80	40	35	12.2	4.6	0.28	North America
07/20/2025	2100	Ra-Shalom	UCAC4	859-001292	1	29	37	81	46	20	13.2	3.4	0.28	Europe
07/22/2025	2100	Ra-Shalom	UCAC4	859-000167	0	10	57	81	38	25	13.3	3.1	0.27	Europe
07/23/2025	2100	Ra-Shalom	TYC	4613-01079-1	23	6	21	80	43	11	11.7	4.5	0.27	Europe
07/24/2025	3200	Phaethon	TYC	2364-01273-1	3	51	0	35	29	26	12	6.7	0.30	North America
07/24/2025	2100	Ra-Shalom	UCAC4	853-015853	22	54	49	80	27	42	12	4.2	0.26	North America
07/26/2025	2100	Ra-Shalom	UCAC4	844-017358	22	2	39	78	39	12	12.7	3.4	0.26	North America
07/26/2025	16	Psyche	UCAC4	542-008216	4	6	11	18	12	21	11.9	0.6	7.66	Australia
07/28/2025	2100	Ra-Shalom	UCAC4	831-020346	21	22	2	76	8	43	13.4	2.6	0.25	North America
07/30/2025	2100	Ra-Shalom	HIP	102933	20	51	16	72	56	53	8.2	7.5	0.24	Japan
07/31/2025	2100	Ra-Shalom	UCAC4	811-028712	20	45	15	72	7	37	13.4	2.3	0.24	Europe
07/31/2025	2100	Ra-Shalom	TYC	4455-00496-1	20	42	46	71	45	29	10.7	4.9	0.24	North America

Other NEA targets' events for June-Julyin XML format for Occult (>10000 in total, caution with Occult limit!).