30 December 2021
⇐20211229 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20211231⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W16N08
(273",177") 		E12-W26
(38) 		3.1 0.5 2.6e20
2 E34N02
(-546",74") 		E48-E16
(32) 		2.1 0.2 7.7e19
3 W28N69
(166",924") 		E04-W57
(61) 		0.6 0.6 1.9e20
4 W44S49
(441",-717") 		W40-W51
(11) 		0.2 0.3 2.0e19
5 W68S05
(900",-59") 		W64-W72
(8) 		0.1 0.5 1.9e19

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 30-Dec-2021 20:30 UT .