Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on December 17, 2009. Coordinates are given as of the end of the day.
| Group ID | Location | Number of sunspots | Area (msh) | Type | CM Passage | Disappearance (W90) | Reappearance (W270) | |
|---|---|---|---|---|---|---|---|---|
| № 1035 | N30 | W18 | 20 | 0140 | Beta-Delta | Dec 17, 2009 | Dec 24, 2009 | Jan 7, 2010 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1980 to December 2009. The gray background is the average SSN index.
