LtE in CMO #276
From
Carlos E HERNANDEZ
® . . . . . . . .Sent: Sunday,
July 27, 2003 6:20
PM
Subject: Mars Observation (July 27, 2003)
I made an observation of Mars this morning using a new
filter designed by Sirius Optics that I am testing. It is appropriately called the Mars Filter.
Much detail was noted across the martian
disk that is difficult to describe. I welcome any comments on my observation.
Date
(U.T.): July 27, 2003
Time
(U.T.): 05:00
CM
328.3
Ls
229.3, De -19.8, Ds -18.5, k 0.95, 21.42"
Instrument:
9-inch (23-cm) F/13.5 Maksutov- Cassegrain
Magnification:
257× and 386×
Filter:
Sirius Optics Mars Filter
Seeing
(1-10): 5-6 (moments of 7-8), Antoniadi (I-V): III
Transparency
(1-6): 5
Notes:
The
South Polar Cap (SPC) was brilliant (10/10) with a dark to dusky (3-4/10)
streak and a dark (3/10), thin rift over it's preceding half. The SPC border
appeared irregular and Argenteus Mons (10/10) was noted towards the following
limb. Sabaeus Sinus (3/10) was noted on the CM and Meridiani Sinus (3/10)
towards the following limb. Edom was prominent (8/10) along the
northern border of Sabaeus Sinus and following Meridiani Sinus. Syrtis Major
(3/10), Mare Hadriacum (3/10), and Mare Tyrrhenum (3/10) were noted towards the
following limb. An extremely bright (9/10) and thin evening (preceding) limb
haze was noted. Libya appeared very to extremely bright
(8-9/10) along the preceding limb. Hellas appeared shaded to bright (6-7/10)
with it's western (preceding) border appearing very bright (8/10, possibly
containing some dust) and the southern portion of Alpheus (4-5/10) noted as well. Iapygia
Viridis (3/10) and Mare Serpentis (3/10) were noted on and just following the
CM. Hellespontus (3/10) and Yaonis Fretum (3/10) were noted preceding and
following the CM, respectively, with Yaonis Regio (7/10) bisecting the two.
Deucalionis Regio and Noachis appeared bright (7/10). Aeria, Arabia, Moab, and
Eden were bright (7/10). Hammonis Cornu
appeared very bright (8/10). Ismenius Lacus (southern
border) was noted adjacent to the extremely bright (9/10) northern limb haze.
Margaritifer Sinus appeared as a dark (3/10) spike adjacent to an extremely
bright (9/10) morning (following) limb haze. Mare Erythraeum appeared dusky to
dull (4-5/10) with portions obscured by haze.
The best of luck in your future
Mars imaging and observations.
Carlos
HERNANDEZ (Miami, FL, USA)
mars@ilcs.net
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