Détails: Mis à jour : 6 Mars 2025

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.
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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

Date	Star		RA			Dec			Conditions			Zone	Map	.kmz
Date	Catalogue	Number	h	m	s	d	m	s	Mv	Drop	Duration	Zone	Map	.kmz
03/11/2025	TYC	1854-00899-1	5	10	20	26	33	26	10,2	10,5	0.03	Japan
03/24/2025	HIP	27817	5	53	9	27	2	40	9,6	11,4	0.03	South America
03/28/2025	UCAC4	586-026030	6	8	47	27	1	11	12,6	8,6	0.03	Europe
04/10/2025	TYC	1901-00097-1	6	46	33	26	32	15	12,4	9	0.03	New Zealand
04/14/2025	UCAC4	582-034995	6	59	31	26	13	49	12,5	9	0.03	Europe

Other Didymos events for February - March in XML format for Occult ( ~300 in total).

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

Potential Hera secondary Targets

Date	Asteroid		Star		RA			Dec			Conditions			Zone	Map
Date	Number	Name	Catalogue	Number	h	m	s	d	m	s	Mv	Drop	Duration	Zone	Map
03/05/2025	88992	2001 TJ72	TYC	0832-00276-1	10	1	38	12	10	26	11,4	9,1	0.12	South America
03/11/2025	88992	2001 TJ72	UCAC4	514-050872	9	56	30	12	41	3	12,8	7,9	0.13	North America
03/13/2025	29886	Randytung	UCAC4	552-037333	7	13	30	20	22	0	13,7	5,2	0.38	Europe
03/16/2025	122764	2000 SX69	UCAC4	511-048992	9	38	45	12	11	34	13,5	1,2	0.17	Europe
03/24/2025	29886	Randytung	UCAC4	553-038850	7	22	28	20	24	59	12,7	6,4	0.26	South America

Other Hera events for February-March in XML format for Occult ( ~400 in total).

Other NEAs

Date	Asteroid		Star		RA			Dec			Conditions			Zone	Map
Date	Number	Name	Catalogue	Number	h	m	s	d	m	s	Mv	Drop	Duration	Zone	Map
03/01/2025	137805	1999 YK5	UCAC4	667-021753	4	1	27	43	19	48	13,1	4,6	0.29	North America
03/01/2025	4179	Toutatis	TYC	1236-00550-1	3	17	30	18	1	21	10,8	7	0.06	Europe
03/03/2025	137170	1999 HF1	UCAC4	497-109606	19	35	21	9	13	56	11,1	4,6	0.24	North America
03/04/2025	4544	Xanthus	TYC	3749-01096-1	5	44	37	53	15	48	11,8	6,8	0.10	North America
03/04/2025	137170	1999 HF1	UCAC4	508-108906	19	31	41	11	25	46	13	2,6	0.24	North America
03/04/2025	4544	Xanthus	UCAC4	716-040070	5	47	3	53	0	50	12,6	5,9	0.10	Europe
03/04/2025	4179	Toutatis	UCAC4	545-007067	3	32	3	18	55	57	12	5,8	0.06	Europe
03/05/2025	137170	1999 HF1	UCAC4	514-096726	19	29	33	12	43	18	12,2	3,4	0.24	Europe
03/05/2025	162173	Ryugu	UCAC4	294-107614	16	58	14	-31	-14	-15	12,8	8,2	0.08	Australia
03/05/2025	162173	Ryugu	UCAC4	294-107832	16	58	27	-31	-14	-25	11,1	9,8	0.08	Australia
03/08/2025	137170	1999 HF1	TYC	1607-01199-1	19	18	32	19	26	15	10,8	4,4	0.25	North America
03/09/2025	175706	1996 FG3	TYC	1864-01474-1	6	8	18	22	30	3	11,1	9,2	0.14	Europe
03/10/2025	137170	1999 HF1	TYC	2123-00626-1	19	12	48	22	54	21	11,2	3,8	0.26	Europe
03/10/2025	137170	1999 HF1	UCAC4	565-081371	19	12	43	22	57	16	12,6	2,5	0.26	Europe
03/10/2025	4544	Xanthus	HIP	29441	6	12	13	50	13	40	9,2	9,5	0.19	Europe
03/10/2025	159402	1999 AP10	UCAC4	452-050790	11	58	36	0	20	58	12,9	6,8	0.09	Europe
03/11/2025	137170	1999 HF1	TYC	2127-02436-1	19	8	24	25	31	23	11,4	3,5	0.26	North America
03/11/2025	137805	1999 YK5	UCAC4	632-015369	4	1	25	36	12	37	13,1	4,8	0.30	Europe
03/12/2025	137170	1999 HF1	TYC	2130-00960-1	19	6	12	26	47	59	12,2	2,8	0.27	Europe
03/12/2025	162173	Ryugu	UCAC4	294-124248	17	15	19	-31	-20	-1	12,9	8	0.09	North America
03/13/2025	137170	1999 HF1	TYC	2134-02347-1	19	3	3	28	36	23	11,1	3,8	0.27	Europe
03/13/2025	137805	1999 YK5	TYC	2365-00240-1	4	1	28	35	22	32	11,9	6	0.30	North America
03/13/2025	3752	Camillo	HIP	92764	18	54	12	36	54	52	8,6	10	0.10	Europe
03/14/2025	137170	1999 HF1	UCAC4	602-068313	19	0	9	30	14	4	12,2	2,7	0.27	Europe
03/14/2025	137170	1999 HF1	TYC	2639-02453-1	18	59	55	30	22	15	10,5	4,3	0.27	Europe
03/14/2025	137170	1999 HF1	TYC	2639-01766-1	18	59	49	30	25	37	10,6	4,1	0.27	Europe
03/14/2025	137170	1999 HF1	UCAC4	604-067765	18	59	23	30	40	19	12,9	2	0.27	North America
03/14/2025	4544	Xanthus	TYC	3380-00569-1	6	25	42	48	35	14	11,2	7,6	0.09	North America
03/15/2025	162173	Ryugu	UCAC4	294-126404	17	23	13	-31	-18	-40	12,8	8,1	0.10	Australia
03/16/2025	137170	1999 HF1	TYC	2642-00878-1	18	53	49	33	39	33	7,8	6,9	0.28	Europe
03/16/2025	137170	1999 HF1	UCAC4	619-064366	18	53	46	33	41	5	13,3	1,7	0.28	Europe
03/16/2025	137170	1999 HF1	TYC	2646-00125-1	18	52	48	34	11	39	11,9	2,9	0.28	North America
03/16/2025	175706	1996 FG3	UCAC4	562-027139	6	19	32	22	19	47	12,8	7,8	0.12	Europe
03/17/2025	162173	Ryugu	UCAC4	294-127334	17	27	54	-31	-16	-47	13	7,8	0.10	Australia
03/18/2025	137170	1999 HF1	TYC	2650-01478-1	18	47	28	36	52	21	11,2	3,6	0.29	Europe
03/18/2025	4544	Xanthus	TYC	3377-00122-1	6	41	8	46	35	33	9,6	9,4	0.09	Japan
03/20/2025	137170	1999 HF1	TYC	3122-01848-1	18	40	56	39	55	1	10,3	4,3	0.30	Europe
03/20/2025	137170	1999 HF1	UCAC4	653-066819	18	39	44	40	27	21	13,4	1,5	0.30	North America
03/20/2025	4544	Xanthus	TYC	3390-00685-1	6	46	57	45	49	1	11	8	0.09	Australia
03/21/2025	137170	1999 HF1	UCAC4	660-066591	18	36	33	41	49	22	12,7	2,1	0.30	North America
03/21/2025	137170	1999 HF1	HIP	91059	18	34	31	42	39	41	8,1	6,6	0.31	Europe
03/23/2025	137170	1999 HF1	UCAC4	676-064034	18	28	17	45	4	25	12,1	2,6	0.31	Japan
03/24/2025	137170	1999 HF1	UCAC4	683-064298	18	24	6	46	34	3	12,4	2,4	0.32	Europe
03/27/2025	137170	1999 HF1	TYC	3533-00298-1	18	15	54	49	13	0	10,8	3,9	0.33	Europe
03/28/2025	162173	Ryugu	UCAC4	296-130674	17	50	19	-30	-52	-54	13,5	7,1	0.13	Australia
03/28/2025	137170	1999 HF1	TYC	3536-01996-1	18	8	56	51	12	10	8,7	6	0.33	Australia
03/29/2025	137170	1999 HF1	UCAC4	712-057675	18	4	29	52	20	51	12,5	2,3	0.34	Europe
04/01/2025	137170	1999 HF1	TYC	3906-01162-1	17	51	34	55	14	30	9,1	5,6	0.35	Europe
04/02/2025	162173	Ryugu	UCAC4	298-144681	17	59	5	-30	-34	-30	13,1	1,4	0.15	Australia
04/05/2025	175706	1996 FG3	UCAC4	558-036389	6	56	19	21	32	59	11,5	9,4	0.08	Europe
04/07/2025	137170	1999 HF1	UCAC4	748-053335	17	26	14	59	25	12	12,6	2,4	0.37	Europe
04/07/2025	4544	Xanthus	TYC	2959-01736-1	7	42	37	37	37	2	11,8	7,6	0.08	Europe
04/08/2025	4544	Xanthus	UCAC4	638-042019	7	43	29	37	28	49	12,2	7,2	0.08	North America
04/09/2025	175706	1996 FG3	UCAC4	557-036804	7	3	24	21	21	10	12,5	8,5	0.08	Australia
04/11/2025	137170	1999 HF1	UCAC4	762-046242	17	0	1	62	18	35	12,9	2,2	0.39	Japan
04/12/2025	137170	1999 HF1	UCAC4	763-047240	16	57	7	62	33	32	12,2	2,9	0.39	North America
04/13/2025	162173	Ryugu	UCAC4	302-206906	18	13	30	-29	-41	-40	13	7,3	0.24	Australia
04/14/2025	3752	Camillo	UCAC4	681-073561	19	47	25	46	1	10	12	6,8	0.15	North America
04/17/2025	2063	Bacchus	TYC	2409-00138-1	5	48	40	32	41	0	11,8	7,2	0.03	North America
04/19/2025	162173	Ryugu	UCAC4	305-223597	18	18	10	-29	-8	-54	12,4	7,7	0.34	North America
04/20/2025	162173	Ryugu	UCAC4	305-224999	18	18	48	-29	-2	-32	13,3	6,8	0.36	North America
04/22/2025	162173	Ryugu	UCAC4	307-215846	18	19	57	-28	-47	-39	13,2	6,8	0.42	Australia
04/24/2025	162173	Ryugu	UCAC4	308-217560	18	20	42	-28	-33	-15	12,9	7,1	0.48	Australia
04/25/2025	438908	2009 XO	HIP	29070	6	7	57	23	40	13	9	13,3	0.01	North America
04/25/2025	4179	Toutatis	UCAC4	565-034810	6	58	38	22	51	4	11,3	7,8	0.07	New Zealand
04/25/2025	163692	2003 CY18	TYC	1864-00754-1	6	2	51	23	19	49	8,6	14,5	0.02	Australia
04/25/2025	2063	Bacchus	TYC	2436-00807-1	6	52	58	31	1	1	12,1	6,9	0.03	Europe
04/26/2025	162173	Ryugu	UCAC4	309-206697	18	21	6	-28	-20	-47	13	6,9	0.51	Australia
04/27/2025	137170	1999 HF1	TYC	4187-00714-1	15	18	55	66	16	41	8,9	6,5	0.44	North America
04/27/2025	137170	1999 HF1	UCAC4	782-024589	15	15	18	66	16	10	12,5	2,9	0.44	Europe
04/30/2025	162173	Ryugu	UCAC4	311-204556	18	21	4	-27	-49	-41	13	6,8	0.49	Australia

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