Daily Sunspot Evaluation
Observation Sheet Tuesday, 27 March 1973
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)
- 3
- Number of spots (f)
- 12
- Relative number (R)
- 42
- Observer
- HM
- Reading
- counts consistent, some coordinates doubtful
- File
- 19730327.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 8 | 6 | 09E | 114 ⚠ | 50 | ||
| 2 | D – 3 | -5 | 79E | 76 | 52 | ||
| 3 | J – 1 | 15 | 70W | 225 | 48 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.