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	Image
	Number	Name	Catalogue	Number	h	m	s	d	m	s	Mv	Drop	Duration
09/01/2025	2100	Ra-Shalom	UCAC4	480-096636	19	20	13	5	58	2	13.4	2.0	0.24	Australia
09/01/2025	16	Psyche	UCAC4	548-011759	4	56	53	19	26	5	12.8	0.2	12.33	Australia
09/01/2025	2100	Ra-Shalom	TYC	0472-00298-1	19	20	19	5	26	29	11.4	3.8	0.24	Europe
09/02/2025	2100	Ra-Shalom	UCAC4	473-095173	19	20	27	4	27	50	12.4	2.9	0.25	Australia
09/02/2025	2100	Ra-Shalom	UCAC4	472-092610	19	20	28	4	20	27	12.1	3.2	0.25	Australia , Japan
09/03/2025	7341	1991 VK	UCAC4	328-103898	17	21	58	-24	29	16	12.3	9.8	0.15	Australia
09/04/2025	2100	Ra-Shalom	TYC	0468-03118-1	19	20	54	2	18	12	8.1	7.2	0.25	South America
09/04/2025	2100	Ra-Shalom	TYC	0464-03280-1	19	21	15	1	11	18	12.6	2.8	0.26	South America
09/05/2025	2100	Ra-Shalom	UCAC4	455-092068	19	21	17	0	57	25	12.3	3.1	0.26	South America
09/05/2025	162173	Ryugu	HIP	84481	17	16	16	-15	13	25	5.7	15.9	0.12	New Zealand
09/05/2025	2100	Ra-Shalom	TYC	0464-01563-1	19	21	30	0	19	18	11.0	4.4	0.26	Australia , Japan
09/05/2025	2100	Ra-Shalom	UCAC4	452-095686	19	21	31	0	16	59	11.2	4.2	0.27	Australia , Japan
09/05/2025	3752	Camillo	UCAC4	543-066574	17	48	47	18	34	51	13.2	5.5	0.08	Europe
09/06/2025	2100	Ra-Shalom	UCAC4	444-103843	19	22	9	-1	17	32	10.9	4.6	0.27	North America
09/06/2025	2100	Ra-Shalom	UCAC4	447-106273	19	21	55	0	42	40	10.8	4.7	0.27	Australia
09/06/2025	2100	Ra-Shalom	UCAC4	449-106138	19	21	45	0	18	18	13.3	2.3	0.26	Australia
09/06/2025	2100	Ra-Shalom	UCAC4	447-106271	19	21	55	0	42	2	8.9	6.6	0.27	South America
09/07/2025	2100	Ra-Shalom	UCAC4	441-101044	19	22	26	-1	55	17	13.1	2.5	0.27	Australia
09/08/2025	2100	Ra-Shalom	UCAC4	437-093991	19	22	49	-2	46	6	12.5	3.1	0.27	North America
09/09/2025	2100	Ra-Shalom	UCAC4	428-103313	19	23	50	-4	31	43	12.3	3.4	0.28	Europe
09/09/2025	2100	Ra-Shalom	UCAC4	428-103320	19	23	51	-4	35	39	12.1	3.6	0.28	Europe
09/09/2025	2100	Ra-Shalom	UCAC4	427-104070	19	23	52	-4	36	5	13.4	2.4	0.28	Europe
09/09/2025	2100	Ra-Shalom	UCAC4	427-104073	19	23	53	-4	38	5	11.9	3.8	0.28	Europe
09/09/2025	2100	Ra-Shalom	UCAC4	427-104076	19	23	54	-4	38	41	12.3	3.4	0.28	Europe
09/10/2025	2100	Ra-Shalom	UCAC4	423-118703	19	24	32	-5	35	15	13.6	2.2	0.29	Europe
09/12/2025	2100	Ra-Shalom	UCAC4	416-129669	19	25	30	-6	54	22	12.6	3.3	0.3	North America
09/14/2025	2100	Ra-Shalom	TYC	5726-01315-1	19	27	49	-9	23	36	11.1	4.9	0.31	North America
09/14/2025	2100	Ra-Shalom	UCAC4	407-118814	19	27	8	-8	44	3	12.5	3.5	0.31	Europe
09/14/2025	2100	Ra-Shalom	UCAC4	404-114330	19	27	44	-9	19	14	13.3	2.8	0.31	South America
09/15/2025	2100	Ra-Shalom	UCAC4	400-119416	19	28	37	-10	7	39	13.6	2.5	0.32	Europe
09/16/2025	2100	Ra-Shalom	UCAC4	397-114913	19	29	18	-10	42	32	11.9	4.1	0.32	Australia
09/18/2025	2100	Ra-Shalom	UCAC4	391-117758	19	30	50	-11	53	28	13.3	2.9	0.33	North America
09/18/2025	162173	Ryugu	UCAC4	372-096295	17	41	48	-15	46	40	12.2	9.5	0.06	Australia
09/19/2025	16	Psyche	UCAC4	548-013453	5	14	18	19	28	46	13.6	0.1	18.6	North America
09/19/2025	2100	Ra-Shalom	TYC	5731-01205-1	19	32	8	-12	46	31	11.7	4.5	0.33	Japan
09/19/2025	3200	Phaethon	UCAC4	660-021020	4	7	39	41	59	11	13.1	5.3	0.51	Japan
09/24/2025	2100	Ra-Shalom	UCAC4	370-174945	19	38	28	-16	9	44	10.8	5.8	0.37	Europe
09/24/2025	3752	Camillo	UCAC4	486-075065	18	5	24	7	1	24	12.0	6.8	0.08	Australia
09/24/2025	162173	Ryugu	UCAC4	371-110398	17	55	23	-15	58	27	11.7	10.1	0.06	Europe
09/24/2025	3200	Phaethon	UCAC4	662-020882	4	3	16	42	23	20	12.5	5.8	0.44	Europe
09/24/2025	2100	Ra-Shalom	UCAC4	371-171870	19	37	58	-15	56	4	12.8	3.8	0.35	Europe
09/26/2025	2100	Ra-Shalom	UCAC4	366-173120	19	39	60	-16	48	33	12.4	4.2	0.36	North America
09/27/2025	16	Psyche	UCAC4	548-014208	5	20	19	19	24	48	13.3	0.1	24.77	North America
09/28/2025	162173	Ryugu	UCAC4	370-120933	18	2	37	-16	2	52	11.7	10.1	0.07	North America
10/01/2025	2100	Ra-Shalom	UCAC4	354-181178	19	47	24	-19	19	45	12.4	4.5	0.37	Australia
10/01/2025	3200	Phaethon	UCAC4	665-020793	3	52	47	42	57	29	13.5	4.7	0.35	Japan
10/02/2025	2100	Ra-Shalom	UCAC4	352-177044	19	48	42	-19	41	32	13.1	3.9	0.37	Australia
10/02/2025	2100	Ra-Shalom	UCAC4	351-182513	19	49	13	-19	50	24	12.2	4.7	0.37	Europe
10/02/2025	16	Psyche	UCAC4	547-014733	5	23	30	19	20	40	11.0	0.7	31.93	Europe
10/04/2025	2100	Ra-Shalom	UCAC4	348-184884	19	51	37	-20	27	3	11.7	5.3	0.37	Japan
10/09/2025	3200	Phaethon	UCAC4	667-019258	3	39	28	43	15	1	12.4	5.6	0.29	Europe
10/18/2025	2100	Ra-Shalom	UCAC4	329-194562	20	13	41	-24	12	25	13.5	4.0	0.34	North America
10/24/2025	3200	Phaethon	UCAC4	663-014308	3	1	20	42	33	25	13.3	4.4	0.22	Europe

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