SDO HMI 2011-08-31 01:59:08 UT
See sunspots with tool (Click here to study sunspot positions and configurations with tool using white-light and magnetogram images and polarity drawing)
(It is recommended to set high resolution on your display!)
| group | Proj. U | Proj. WS | Corr. U | Corr. WS | B | L | LCM | Pos. angle | r | MU | MP |
| 18.90 | 29.39 | 18.94 | 29.22 | 18.21 | 359.68 | 60.88 | 286.91 | 0.8693 | -445.8 | -153.5 | |
|
previous
or next observation for the same group /
back to the solar disc SDO HMI 2011-08-31 01:59:08 UT
See sunspots with tool (Click here to study sunspot positions and configurations with tool using white-light and magnetogram images and polarity drawing) (It is recommended to set high resolution on your display!) |
| spot | Proj. U | Proj. WS | Corr. U | Corr. WS | B | L | LCM | Pos. angle | r | MU | MP |
| 18.90 | 25.70 | 18.94 | 25.76 | 18.25 | 359.94 | 61.14 | 286.94 | 0.8715 | -622.2 | -414.1 | |
| 0.00 | 0.99 | 0.00 | 0.95 | 18.62 | 358.52 | 59.73 | 287.43 | 0.8599 | 393.0 | 284.5 | |
| 0.00 | 0.90 | 0.00 | 0.84 | 17.52 | 357.60 | 58.81 | 286.19 | 0.8516 | 383.0 | 351.8 | |
| 0.00 | 0.99 | 0.00 | 0.92 | 17.65 | 357.49 | 58.70 | 286.36 | 0.8506 | 345.0 | 392.6 | |
| 0.00 | 0.81 | 0.00 | 0.75 | 17.90 | 357.19 | 58.40 | 286.67 | 0.8481 | 436.0 | 424.3 | |
| Proj. U | - Projected umbra area in millionths of solar disc, negative values indicate | |
|
that the umbra consists of fragmented regions which cannot be separated without losing umbral area. In this way several spots (intensity minima in the umbra) have a common umbra, e.g. -2 means that the given spot shares an umbra with spot No.2, and the common U value is indicated at spot No.2. |
||
| Proj. WS | - Projected whole spot area in millionths of solar disc, negative values indicate | |
|
that several umbras have a common penumbra, e.g. -7 means that the given umbra shares a penumbra with umbra No.7, and the WS value is indicated at No.7. |
||
| Corr. U | - Corrected umbra area in millionths of solar hemisphere, for negative values see above | |
| Corr. WS | - Corrected whole spot area in millionths of solar hemisphere, for negative values see above | |
| B | - Heliographic latitude B; positive: North, negative: South | |
| L | - Heliographic longitude L | |
| LCM | - Longitudinal distance from the Sun's central meridian | |
| Pos. angle | - Position angle | |
| r | - Distance from the centre of Sun's disc in terms of Sun's radius | |
| MU | - Mean magnetic field within the umbra contour averaged the pixel values with sign. | |
| MP | - Mean magnetic field within the penumbra contour averaged the pixel values with sign. | |