20 May 2023
⇐20230519 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20230521⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E15S18
(-234",-257") 		E34-W13
(47) 		6.0 -4.5 -4.4e21
2 W12S47
(139",-672") 		E11-W22
(33) 		1.7 -2.8 -1.0e21

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 20-May-2023 23:30 UT .