Daily Sunspot Evaluation
Observation Sheet Thursday, 13 June 1991
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)
- 11
- Number of spots (f)
- 80
- Relative number (R)
- 190
- Observer
- HE
- Reading
- all checks consistent
- File
- 19910613.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | EKC – 27 | 32 | 49W | 243 | 48W | 15 | 271 |
| 2 | AR – 2 | 10 | 43W | 239 | 44W | 0.5 | 270 |
| 3 | HS – 1 | -2 | 70W | 266 | 81W | 1.5 | 291 |
| 4 | EAI – 9 | -14 | 50W | 246 | 51W | 12 | 281 |
| 5 | BRO – 5 | -17 | 49W | 245 | 50W | 7 | 254 |
| 6 | HA – 2 | -19 | 37W | 233 | 38W | 2.5 | 274 |
| 7 | BRI – 7 | -15 | 14W | 210 | 15W | 5 | 286 |
| 8 | CAI – 10 | -22 | 10W | 206 | 11W | 8.5 | 282 |
| 9 | AX – 1 | -16 | 05W | 201 | 06W | - | 292 |
| 10 | DAI – 8 | -6 | 10E | 186 | 01E | 6 | 296 |
| 11 | BRO – 8 | -22 | 33E | 163 | 32E | 7.5 | 295 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.