groupProj. UProj. WSCorr. UCorr. WS BLLCMPos. angler

8869m 155 971 135 828 -18.82 116.25 54.80 251.72 0.8145


previous   or   next   day for the same group / back to the solar disc

SOHO MDI 2000-02-20 14:41:32 UT

No observation available


spotProj. UProj. WSCorr. UCorr. WSBLLCMPos. angler

1 4 310 5 302 -18.01 122.63 61.19 253.22 0.8723
2 12 -1 12 -1 -18.51 122.43 60.98 252.64 0.8708
3 8 -1 8 -1 -18.03 121.64 60.20 253.15 0.8642
4 8 -1 8 -1 -18.36 121.18 59.73 252.75 0.8604
5 0 3 0 3 -17.39 120.17 58.72 253.84 0.8513
6 7 -1 7 -1 -18.69 120.72 59.28 252.34 0.8567
7 11 -1 10 -1 -18.05 120.29 58.84 253.06 0.8526
8 0 1 0 1 -16.08 118.92 57.48 255.33 0.8397
9 0 1 0 1 -18.19 118.89 57.45 252.81 0.8404
10 0 7 0 6 -17.23 118.19 56.74 253.92 0.8334
11 0 5 0 4 -17.66 118.25 56.80 253.40 0.8342
12 0 7 0 6 -18.41 117.51 56.07 252.44 0.8279
13 8 20 7 17 -18.15 116.52 55.08 252.68 0.8184
14 5 27 4 23 -20.00 117.31 55.87 250.51 0.8273
15 4 10 3 8 -16.79 114.95 53.50 254.22 0.8020
16 7 103 6 85 -18.61 115.47 54.03 252.01 0.8087
17 6 -16 5 -16 -17.91 114.81 53.37 252.81 0.8016
18 0 7 0 6 -19.46 115.39 53.94 250.95 0.8087
19 1 8 1 6 -16.90 114.12 52.68 254.00 0.7938
20 5 -16 4 -16 -17.68 114.37 52.93 253.06 0.7970
21 2 13 2 11 -20.33 115.54 54.10 249.90 0.8111
22 4 28 3 22 -17.24 113.52 52.08 253.53 0.7880
23 3 -22 3 -22 -17.58 113.27 51.82 253.06 0.7857
24 12 417 10 324 -19.69 113.38 51.94 250.41 0.7892
25 3 -24 2 -24 -18.41 112.50 51.05 251.92 0.7786
26 9 -24 7 -24 -19.75 112.68 51.24 250.23 0.7822
27 3 -24 2 -24 -19.49 111.99 50.54 250.45 0.7747
28 27 -24 21 -24 -19.66 111.09 49.65 250.10 0.7656
29 0 3 0 3 -17.61 110.29 48.85 252.66 0.7542
30 6 -24 5 -24 -19.93 110.70 49.26 249.68 0.7619
31 0 1 0 0 -18.58 109.24 47.80 251.21 0.7441


  • 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