20 January 2023
20230119 Week Rotation Today Rotation Week 20230121



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E17S06
(-283",-16")
E29-W01
(30)
2.6 1.4 5.9e20
2 W04S74
(19",-913")
E79-W54
(133)
0.9 -0.8 -3.1e20
3 E49N15
(-714",304")
E54-E44
(10)
0.4 3.4 3.8e20
4 W12S60
(105",-801")
W03-W17
(14)
0.3 -0.3 -2.1e19
5 E37S07
(-580",-57")
E39-E35
(4)
0.1 -1.3 -1.6e19
6 W44S51
(426",-720")
W40-W48
(8)
0.0 -2.9 -3.5e19
7 W27S56
(244",-762")
W24-W29
(5)
0.0 -2.0 -2.0e19

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-Jan-2023 20:30 UT .