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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on May 29, 1999. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8560 | S25 | E59 | 03 | 0090 | ALPHA | Jun 4, 1999 | Jun 11, 1999 | Jun 25, 1999 |
| № 8559 | N21 | E11 | 04 | 0300 | ALPHA | May 31, 1999 | Jun 7, 1999 | Jun 21, 1999 |
| № 8558 | N14 | E66 | 01 | 0020 | ALPHA | Jun 4, 1999 | Jun 11, 1999 | Jun 25, 1999 |
| № 8557 | S29 | E54 | 04 | 0030 | BETA | Jun 3, 1999 | Jun 10, 1999 | Jun 25, 1999 |
| № 8556 | S14 | W08 | 04 | 0010 | BETA | May 30, 1999 | Jun 5, 1999 | Jun 19, 1999 |
| № 8555 | N17 | E47 | 01 | 0050 | ALPHA | Jun 3, 1999 | Jun 10, 1999 | Jun 23, 1999 |
| № 8554 | N27 | W04 | 07 | 0020 | BETA | May 30, 1999 | Jun 6, 1999 | Jun 20, 1999 |
| № 8552 | N21 | E04 | 13 | 0170 | BETA-GAMMA | May 30, 1999 | Jun 6, 1999 | Jun 20, 1999 |
| № 8551 | N32 | W27 | 01 | 0020 | ALPHA | May 28, 1999 | Jun 4, 1999 | Jun 18, 1999 |
| № 8550 | S15 | W47 | 08 | 0030 | BETA | May 27, 1999 | Jun 2, 1999 | Jun 16, 1999 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1970 to May 1999. The gray background is the average SSN index.
