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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on December 5, 1998. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8403 | N19 | E40 | 01 | 0030 | ALPHA | Dec 9, 1998 | Dec 16, 1998 | Dec 30, 1998 |
| № 8402 | N16 | E28 | 10 | 0270 | BETA | Dec 8, 1998 | Dec 15, 1998 | Dec 28, 1998 |
| № 8401 | N10 | W24 | 04 | 0030 | BETA | Dec 4, 1998 | Dec 11, 1998 | Dec 24, 1998 |
| № 8398 | N18 | W50 | 04 | 0010 | BETA | Dec 2, 1998 | Dec 9, 1998 | Dec 23, 1998 |
| № 8397 | N14 | E08 | 08 | 0260 | BETA | Dec 6, 1998 | Dec 13, 1998 | Dec 27, 1998 |
| № 8395 | N20 | W38 | 11 | 0220 | BETA | Dec 3, 1998 | Dec 10, 1998 | Dec 24, 1998 |
| № 8393 | S15 | W76 | 01 | 0070 | ALPHA | Nov 30, 1998 | Dec 7, 1998 | Dec 21, 1998 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1969 to December 1998. The gray background is the average SSN index.
