27 September 2021
⇐20210926 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210928⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W17N63
(127",796") 		E74-W61
(135) 		7.0 1.0 1.9e21
2 W23N00
(367",-97") 		W02-W40
(38) 		3.1 -0.2 -8.6e19
3 E32N06
(-500",4") 		E39-E24
(15) 		1.9 -0.0 -1.1e19
4 E41S19
(-600",-389") 		E48-E32
(16) 		0.4 -0.5 -4.7e19
5 W14N07
(238",4") 		W12-W17
(5) 		0.1 -1.2 -1.7e19
6 E09N03
(-142",-68") 		E10-E05
(5) 		0.1 -1.1 -1.0e19

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 27-Sep-2021 23:30 UT .