19981212.174423

December 12, 1998

19981212.174423_mk4

Center =195.87+/-1.49 degrees PA (SW quadrant) (red radial line)	Maximum height = 1.34+/-0.02 Rsun
Width (at 1.20 Rsun) = 19.00+/-1.48 degrees latitude (measured between edges -- vertical dashed lines at inflection points)	Width (at 1.27 Rsun) = 15.80+/-1.50 degrees latitude
Cavity depletion, equatorward (1.20 Rsun) = 0.24+/-0.018 (ratio of red to blue dashed line)	Cavity depletion, equatorward (at 1.27 Rsun) = 0.19+/-0.032 (ratio of red to blue dashed line)
Cavity depletion, poleward (1.20 Rsun) = 0.15+/-0.024 (ratio of green to blue dashed line) Minimum intensity in cavity (1.20 Rsun) = 2.8e-07+/-2.8e-09 (Bsun) (blue dashed lines);	Cavity depletion, poleward (1.27 Rsun) = 0.18+/-0.034 (ratio of green to blue dashed line) Minimum intensity in cavity (1.27 Rsun) = 2.1e-07+/-5.7e-09 (Bsun) (blue dashed lines);
Slope at equatorward cavity edge (1.20 Rsun) = 1.7e-08+/-5.5e-09 (Bsun/degree)	Slope at equatorward cavity edge (1.27 Rsun) = 7.1e-09+/-4.2e-09 (Bsun/degree)
Slope at poleward cavity edge (1.20 Rsun) = -1.2e-08+/-5.5e-09 (Bsun/degree)	Slope at poleward cavity edge (1.27 Rsun) = -2.2e-08+/-4.2e-09 (Bsun/degree)

length lower limit = 8 days visible in white light at limb December 12; -13; -14; -15*; -16; -17; -18; -19 (CME!);
Also visibile Feb 4-5 1999
Evolution comments = PCF-S which erupts Dec 19 -- visible in Mk4, but not great quality. Also visible Feb 4-5 1999.

Neutral line orientation at the limb =
CME/dimmings association = CME December 19; prominence eruption on December 19;
Active region association = N/A
Filament/FC association = PCF-S; PCF
Other comments: N/A
Filament - only visible in H-alpha or EUV
Necking - no neck

Cavity list (e.g. Tables 2 + 3)
Full list of cavity days observed
List of best cavity days (SET 1) observed (e.g. Table 1)
CMEs associated with cavities (e.g. Tables 7 + 8)
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