17 December 2021
⇐20211216 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20211218⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E15S04
(-255",-43") 		69
(1.5e05) 		-0.9 4.5 6.8e21
2 W17S58
(155",-814") 		E50-W65
(115) 		5.9 -0.5 -8.9e20
3 W43S05
(666",-72") 		W28-W60
(32) 		1.5 0.3 1.1e20
4 W50S38
(589",-597") 		W33-W67
(34) 		1.4 -1.0 -4.1e20
5 W23S23
(349",-360") 		W10-W32
(22) 		0.8 -1.3 -1.8e20
6 W38N06
(599",121") 		W36-W41
(5) 		0.1 -0.6 -8.2e18
7 W56S08
(799",-125") 		W53-W59
(6) 		0.1 -0.7 -1.1e19
8 E52N01
(-766",37") 		4
(1.1e03) 		-0.8 3.4 3.7e19

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 17-Dec-2021 20:30 UT .