Typical scale lengths affected by screening.
|Comet||⟨ rh ⟩||QH2O||vexp||LH2O||LOH||⟨ rthick(Ly α) ⟩||LHCN|
|[AU]||[1029 s-1]||[km s-1]||[km]||[km]||[km]||[km]|
|C/1996 B2 (Hyakutake)||0.25||5||1.60||7900||14300||90||6600|
|C/1995 O1 (Hale-Bopp)||0.91||100||1.10||70 000||128 000||2700||58 000|
|C/2002 X5 (Kudo-Fujikawa)||0.21||35||1.25||3600||7200||820||2900|
|C/2002 V1 (NEAT)||0.12||20||2.00||2000||3800||300||1600|
|C/2006 P1 (McNaught)||0.23||300||1.50||8100||14 900||5900||4900|
Notes. LH2O, LOH, LHCN: unscreened scale lengths of H2O, OH, and HCN, taking into account solar activity, expansion velocity, and heliocentric distance. ⟨ rthick(Ly α) ⟩ : mean radius of the optically thick Lyman α envelope ().
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