22 May 2023
20230521 Week Rotation Today Rotation Week 20230523



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W21S17
(327",-254")
E07-W37
(44)
6.9 -3.9 -4.7e21
2 E48N37
(-562",593")
E56-E36
(20)
0.6 -1.8 -3.4e20
3 W39S39
(468",-574")
W34-W48
(14)
0.5 -4.3 -5.6e20

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 22-May-2023 23:30 UT .