20 December 2021
20211219 Week Rotation Today Rotation Week 20211221



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W28S02
(462",-12")
E14-W46
(60)
5.9 -0.6 -5.7e20
2 W42S69
(233",-903")
E60-W70
(130)
1.5 -0.6 -4.9e20
3 E49N55
(-417",813")
E61-E12
(49)
1.4 0.3 1.6e20
4 W52S22
(720",-343")
W41-W67
(26)
0.3 -2.4 -2.2e20
5 W03N49
(34",760")
E01-W05
(6)
0.1 -0.6 -1.1e19

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-Dec-2021 20:30 UT .