4 May 2023
⇐20230503 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20230505⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W15S45
(180",-626") 		E37-W49
(86) 		6.5 1.9 2.7e21
2 W17N08
(277",186") 		E01-W30
(31) 		2.2 0.8 3.0e20
3 E48N25
(-639",444") 		E59-E39
(20) 		0.3 6.4 5.8e20

Note: Solar Monitor's coronal hole segmentations are performed by CHIMERA, a copy of which is available at: github.com/TCDSolar/CHIMERA.

The operations of the CHIMERA algorithm is described in a peer reviewed paper: arxiv.org/abs/1711.11476.

An extensive copy of coronal hole properties are available at: solarmonitor.org/data.

The latest positions of the coronal holes are given in heliocentric co-ordinates, and the region positions are valid on 4-May-2023 23:30 UT .