Daily Sunspot Evaluation
Observation Sheet Thursday, 18 May 1978
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)
- 8
- Number of spots (f)
- 82
- Relative number (R)
- 162
- Observer
- GT
- Reading
- all checks consistent
- File
- 19780518.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 2 | 18 | 12E | 198 | 08E | ||
| 2 | J – 3 | 13 | 19E | 191 | 16E | ||
| 3 | J – 3 | -29 | 73E | 137 | 70E | ||
| 4 | D – 22 | -26 | 18E | 192 | 15E | ||
| 5 | J – 3 | -30 | 26E | 184 | 23E | ||
| 6 | D – 19 | -23 | 45W | 255 | 48W | ||
| 7 | J – 1 | 16 | 76W | 286 | 79W | ||
| 8 | D – 29 | 21 | 04W | 214 | 07W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.