No image for the selected date
Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on December 13, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8411 | S29 | E49 | 05 | 0030 | BETA | Dec 18, 1998 | Dec 25, 1998 | Jan 8, 1999 |
| № 8410 | N23 | E58 | 01 | 0070 | ALPHA | Dec 19, 1998 | Dec 26, 1998 | Jan 9, 1999 |
| № 8409 | S29 | E10 | 21 | 0200 | BETA-GAMMA | Dec 15, 1998 | Dec 22, 1998 | Jan 5, 1999 |
| № 8408 | S18 | W02 | 19 | 0090 | BETA-GAMMA | Dec 14, 1998 | Dec 21, 1998 | Jan 4, 1999 |
| № 8406 | S28 | W01 | 01 | 0030 | ALPHA | Dec 14, 1998 | Dec 21, 1998 | Jan 4, 1999 |
| № 8404 | S22 | W80 | 13 | 0230 | BETA | Dec 8, 1998 | Dec 15, 1998 | Dec 29, 1998 |
| № 8403 | N20 | W69 | 01 | 0030 | ALPHA | Dec 9, 1998 | Dec 16, 1998 | Dec 30, 1998 |
| № 8402 | N17 | W84 | 01 | 0060 | ALPHA | Dec 8, 1998 | Dec 15, 1998 | Dec 28, 1998 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1969 to December 1998. The gray background is the average SSN index.
