December 9, 1981 Solar Image

1243 CST (1843Z)

full solar disk Dec 9, 1981 33,727 bytes
(click on image for full size)

(RV-6, 40-mm eyepiece, afocal mode, Plus-X, 1/500-second exposure)
(Snappy 3.0 capture from a 35-mm negative)

This is about as spot-laden a solar disk that I've come across.
10.7-cm solar flux  = 305       Boulder spot count  = 378
American spot count = 241       Zurich spot count   = 247
Solar Region Guide
Disk Regions Dec 9, 1981 50,009 bytes

(click on image for full size)
 reg  lat lon  area   Z    #  mag
3487  N06 W47   290  DAO  14   B 
3491  S16 W22    70  CSO   2   B 
3492  N19 W17   850  EKI  39  BGD
3494  S32 W17    70  DSO  10   B 
3496  N09 W16   800  EKI  38  BGD
3497  S20 W10   180  CAO   9   B 
3498  S15 W01   120  CSO   4   B 
3499  N12 W01   160  HSX   1   A 
3500  N06 E02   100  CAO  15   B 
3501  N18 E25   100  HSX   1   A 
3503  N10 E20   270  DAO  21   B 
3504  S15 E33   710  DKI  17  BD 
3505  S07 E51   460  DKO  11   B 
3506  S20 E42    60  CSO   5   B 
3507  S06 E20    60  DRO   7   B

Incidentally, during this photo an M5.2/3B flare was occurring from 3496 at N12 W16. 1817-1912-2139, start-peak-end (half-power points in Hydrogen Alpha).
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Page last updated November 4, 1999
(Minor mod: January 20, 2001)