18 December 2022
20221217 Week Rotation Today Rotation Week 20221219



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W17N19
(269",345")
E00-W31
(31)
1.9 2.7 8.9e20
2 E34N08
(-541",156")
E47-E19
(28)
1.9 0.8 2.9e20
3 W16S44
(195",-666")
W02-W28
(26)
0.8 -3.2 -5.4e20
4 E11N22
(-172",382")
E14-E07
(7)
0.2 8.6 2.5e20
5 W37N15
(564",278")
W32-W40
(8)
0.2 -0.9 -2.9e19
6 W34N06
(541",114")
W33-W35
(2)
0.1 -1.5 -1.5e19
7 W54S26
(710",-408")
W51-W56
(5)
0.1 -0.6 -8.6e18

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 18-Dec-2022 20:30 UT .