21 December 2013
20131220 Week Rotation Today Rotation Week 20131222



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E27N44
(-323",696")
E50-W38
(88)
7.4 1.2 6.4e33
2 W29S56
(262",-796")
E06-W50
(56)
1.1 -0.9 -1.1e33

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 21-Dec-2013 20:35 UT .