Daily Sunspot Evaluation
Observation Sheet Wednesday, 21 May 1980
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)
- 14
- Number of spots (f)
- 102
- Relative number (R)
- 242
- Observer
- OG
- Reading
- counts consistent, some coordinates doubtful
- File
- 19800521.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAO – 13 | 16 | 26W | 267 | 28W | 11 | |
| 2 | AKX – 1 | 9 | 05E | 236 | 03E | - | |
| 3 | DKC – 25 | 16 | 25E | 216 | 23E | 10 | |
| 4 | HAX – 1 | 25 | 28E | 213 | 26E | 1 | |
| 5 | HAX – 1 | -19 | 74W | 315 | 76W | 2 | |
| 6 | HAX – 1 | -25 | 64W | 305 | 66W | 15 | |
| 7 | HKX – 7 | -8 | 50W | 291 | 52W | 35 | |
| 8 | DKC – 25 | -13 | 09W | 250 | 11W | 10 | |
| 9 | ARX – 2 | -30 | 12E | 229 | 10E | 1 | |
| 10 | HAX – 1 | -24 | 39E | 202 | 37E | 1 | |
| 11 | HKX – 3 | -20 | 46E | 201 ⚠ | 38E | 3 | |
| 12 | DKO – 7 | -8 | 53E | 188 | 51E | 4 | |
| 13 | HEX – 8 | -20 | 65E | 176 | 63E | 8 | |
| 14 | EKO – 7 | -12 | 65E | 176 | 63E | 14 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.