23 May 2017
⇐20170522 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170524⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 -410
(-221",746") 		1.9e05
(2.3) 		9.2 -5.8 -1.1e34
2 -307
(-22",-879") 		3.6e05
(1.7) 		5.6 -6.9 -2.5e34
3 -7
(97",31") 		5.5e03
(0.3) 		12.6 -4.8 -2.7e32
4 787
(819",-323") 		2.3e04
(0.1) 		5.9 -6.2 -1.4e33

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 23-May-2017 23:30 UT .