Daily Sunspot Evaluation
Observation Sheet Monday, 21 May 1979
There is no typed record for this day. The values below were read by computer from the table on the sheet; when in doubt, see the drawing. Details →
- Number of groups (g)
- 7
- Number of spots (f)
- 16
- Relative number (R)
- 86
- Observer
- GA
- Reading
- all checks consistent
- File
- 19790521.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 18 | 62E | 331 | 59E | 279 | |
| 2 | J – 1 | -17 | 44E | 349 | 41E | 276 | |
| 3 | B – 5 | -20 | 35E | 358 | 32E | 277 | |
| 4 | J – 2 | -30 | 71W | 104 | 74W | 272 | |
| 5 | J – 1 | 13 | 69W | 102 | 72W | 267 | |
| 6 | J – 2 | 23 | 31W | 64 | 34W | 265 | |
| 7 | B – 4 | 24 | 20W | 53 | 23W | 280 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.