SDO HMI 2011-02-28 16:58:58 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 |
| 1.21 | 11.30 | 0.72 | 6.83 | 18.06 | 177.87 | -24.43 | 43.39 | 0.5744 | -338.8 | -488.0 | |
|
previous
or next observation for the same group /
back to the solar disc SDO HMI 2011-02-28 16:58:58 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 |
| 0.00 | 0.95 | 0.00 | 0.56 | 16.34 | 179.77 | -22.53 | 43.30 | 0.5382 | 636.0 | 503.4 | |
| 1.21 | 5.43 | 0.72 | 3.25 | 17.32 | 178.32 | -23.98 | 43.79 | 0.5627 | -880.9 | -840.9 | |
| 0.00 | 1.03 | 0.00 | 0.63 | 18.45 | 177.44 | -24.86 | 43.40 | 0.5827 | -650.0 | -530.0 | |
| 0.00 | 1.90 | 0.00 | 1.17 | 19.58 | 177.25 | -25.04 | 42.23 | 0.5957 | -145.0 | -230.9 | |
| 0.00 | 1.21 | 0.00 | 0.74 | 19.31 | 176.81 | -25.49 | 43.05 | 0.5972 | -569.0 | -439.4 | |
| 0.00 | 0.78 | 0.00 | 0.48 | 18.87 | 176.29 | -26.01 | 44.14 | 0.5980 | -576.0 | -422.7 | |
| 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. | |