Daily Sunspot Evaluation
Observation Sheet Thursday, 27 January 1972
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)
- 10
- Number of spots (f)
- 53
- Relative number (R)
- 153
- Observer
- HM
- Reading
- all checks consistent
- File
- 19720127.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 2 | 14 | 40E | 326 | |||
| 2 | A – 2 | 14 | 54E | 312 | |||
| 3 | A – 1 | 10 | 62E | 304 | |||
| 4 | C – 14 | -14 | 26E | 340 | |||
| 5 | A – 1 | -15 | 20E | 346 | |||
| 6 | B – 2 | -18 | 24E | 342 | |||
| 7 | C – 12 | -16 | 38W | 44 | |||
| 8 | A – 1 | -14 | 48W | 54 | |||
| 9 | C – 17 | -9 | 39W | 45 | |||
| 10 | A – 1 | 15 | 15W | 21 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.