17 May 2023
20230516 Week Rotation Today Rotation Week 20230518



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E51S17
(-709",-253")
E67-E31
(36)
2.8 -2.2 -1.5e21
2 E37S48
(-379",-682")
E52-E20
(32)
1.5 -1.9 -7.8e20
3 W15S11
(247",-141")
W10-W19
(9)
0.7 -1.9 -1.9e20
4 W08S45
(96",-646")
E01-W12
(13)
0.3 -0.9 -4.5e19
5 E17N39
(-220",626")
E21-E13
(8)
0.1 3.8 1.1e20

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-May-2023 23:30 UT .