Daily Sunspot Evaluation
Observation Sheet Sunday, 7 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)
- 14
- Number of spots (f)
- 117
- Relative number (R)
- 257
- Observer
- HE
- Reading
- all checks consistent
- File
- 19910707.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CKO – 16 | 10 | 43W | 283 | 45W | 17 | 331 |
| 2 | AR – 2 | 18 | 38W | 278 | 40W | 2 | 335 |
| 3 | CKO – 12 | 16 | 17W | 257 | 19W | 8 | 342 |
| 4 | CAO – 7 | 21 | 04W | 244 | 06W | 12 | 344 |
| 5 | FKO – 28 | 27 | 02E | 238 | 00 | 18 | 343 |
| 6 | HS – 8 | 34 | 19E | 221 | 17E | 5.5 | 349 |
| 7 | HK – 10 | 12 | 28E | 212 | 26E | 4 | 350 |
| 8 | CAO – 5 | -12 | 42W | 282 | 44W | 6.5 | 346 |
| 9 | HS – 1 | -12 | 13W | 253 | 15W | 1.5 | 347 |
| 10 | AX – 3 | -16 | 11W | 251 | 13W | 1 | 348 |
| 11 | BRO – 8 | -26 | 13E | 227 | 11E | 5 | 356 |
| 12 | HS – 1 | -18 | 24E | 216 | 22E | 1.5 | 351 |
| 13 | BRI – 7 | -13 | 62E | 178 | 60E | 5.5 | 357 |
| 14 | ? – 9 | -25 | 78E | 162 | 76E | 358 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.