Daily Sunspot Evaluation
Observation Sheet Tuesday, 9 July 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)
- 15
- Number of spots (f)
- 82
- Relative number (R)
- 232
- Observer
- HÇ0
- Reading
- all checks consistent
- File
- 19910709.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAO – 4 | 12 | 62W | 276 | 65W | 7 | 331 |
| 2 | CAI – 12 | 16 | 44W | 258 | 47W | 5 | 342 |
| 3 | HA – 1 | 22 | 36W | 250 | 39W | 1 | 344 |
| 4 | DAO – 16 | 28 | 26W | 240 | 29W | 11 | 343 |
| 5 | AX – 4 | 30 | 07W | 221 | 10W | 1.5 | 363 |
| 6 | CAI – 6 | 36 | 08W | 222 | 11W | 3.5 | 349 |
| 7 | HK – 7 | 12 | 03E | 211 | 00 | 4 | 350 |
| 8 | AR – 1 | 20 | 42E | 172 | 39E | 0.5 | 360 |
| 9 | HA – 1 | -12 | 39W | 253 | 42W | 1.5 | 344 |
| 10 | BRO – 3 | -27 | 12W | 226 | 15W | 2 | 356 |
| 11 | HS – 1 | -17 | 02W | 216 | 05W | 1 | 351 |
| 12 | AX – 1 | -23 | 01E | 213 | 02W | - | 364 |
| 13 | AX – 1 | -17 | 28E | 186 | 25E | - | 357 |
| 14 | FKO – 21 | -25 | 50E | 164 | 47E | 19 | 358 |
| 15 | ? – 3 | -11 | 75E | 139 | 72E | 3 | 365 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.