4 January 2023
⇐20230103 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20230105⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W50N03
(750",81") 		W39-W63
(24) 		0.5 -0.4 -4.9e19
2 E39N42
(-451",691") 		E49-E34
(15) 		0.3 -4.7 -4.6e20
3 W37N38
(462",642") 		W28-W45
(17) 		0.3 -1.8 -1.2e20
4 E31N29
(-444",512") 		E34-E28
(6) 		0.0 -17.9 -1.7e20

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 4-Jan-2023 20:30 UT .