20 May 2012
20120519 Week Rotation Today Rotation Week 20120521



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W07S09
(122",-116")
E06-W12
(18)
1.6 -1.8 -5.4e32
2 E17N23
(-256",398")
E22-E10
(12)
0.8 -3.1 -7.0e32

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 20-May-2012 23:00 UT .