Daniel M. Troiani
Mars Section Leader, Association of Lunar and Planetary Observers
Rima Tenuis Observatory
629 Verona Ct.
Schuamburg, IL 60193
Date: 5/7/97 U.T.
CM: 272 deg
Ls: 116.84 deg
De: +24.42 deg
Mars Date: July 17
Telescope: 17 1/2" f/4.5 newt. 520x
Filter: Red-W#25, Violet=W#47, Blue=W#80A
Seeing: 8 (1-10, 10 best)
Transparency: 5.5 (1-6, 6 best)
Observing Station: Rima Tenuis Observatory
Schaumburg, IL 60193
+42.09o LAT. North, 88.66o LONG. West,
Notes: Hellas and SLH very bright white. Some dim ELH that was brighter and larger in violet light. Signs of thin clouds just south and around the NPC. Otherwise a fairly clear atmosphere. No signs of any dust!!
(Legend: N=north. S=south, P=preceding, F=following, Np=North- preceding,Nf=North-following,Sp=South-preceding, Sf=South- following, MLH=Morning limb haze, ELH=Evening limb haze,SLH=Southern limb haze, ECB=Equatorial cloud band,NPC=North Polar Cap.)