LtE in CMO #275

From Carlos E HERNANDEZ



. . . . . . . To: "Masami Murakami" <cmo@mars.dti.ne.jp>

Sent: Friday, July 11, 2003 7:25 PM

Subject: Mars Observation (July 11, 2003)

 

I have made an observation of Mars this morning under average to good seeing conditions (5-8/10). The dust storm at this time was localized over Electris-Eridania with a thin segment visible along the southern border of Mare Sirenum. I welcome any comments on my observation.

 

Date (U.T.): July 11, 2003

Time (U.T.): 06:30

CM: 138.1

Ls 219.3 (Northern Mid-Autumn)

De -20.5. Ds -15.4, k 0.92

Diameter: 18.4 arc-seconds

 

9-inch (23-cm) F/13.5 Maksutov-Cassegrain

Magnification: 248x, 282x, and 362x

Filters (Wratten): 23A, 30, 38, and 64

Seeing (1-10): 5-6 (moments of 7-8), Antoniadi (I-V): III (moments of II)

Transparency (1-6): 2-3 (Hazy)

 

Notes:

The South Polar Cap (SPC) appeared brilliant (10/10) with a thin, dark (3/10) core and a rift noted over it's following half. The SPC appeared to be surrounded by a dark (3/10) collar (Mare Australe). Mare Sirenum appeared prominent (3/10) over the CM with thin, dark (3/10) projections noted to extend from it's northern border connecting to a dusky (4/10), thin albedo feature parallel to it. A thin, very bright (8/10) segment of the dust storm was visible along the southern border of Mare Sirenum. Phaethontis-Electris appeared dull to shaded (5-6/10). Aonius Sinus-Phasis appeared as a thin, dusky (4/10) wedge between the eastern (preceding) end of Mare Sirenum and a dusky (4/10) Solis Lacus. Lunae Lacus appeared as a dusky (4/10) condensation along the border of an extremely bright (9/10) evening (preceding) limb haze. The dust storm was visible over the south-following limb over Electris-Eridania (at this time enhanced by haze as it has been reported to have weakened significantly). The eastern (preceding) portion of Mare Cimmerium was visible along the following limb adjacent to an extremely bright (9/10) morning (following) limb haze. Tharsis, Memnonia, Amazonis, and Arcadia appeared bright (7/10). The Propontis complex and Phlegra appeared dusky (4/10) adjacent to an extremely bright (9/10) northern limb haze. Trivium Charontis appeared as a small, dark (3/10) condensation adjacent to a very to extremely bright (8-9/10) Elysium with an apparent haze over it.

 

The best of luck to you, Dr. Minami, your fellow recorders and the OAA Mars Section.

Respectfully,

 

. . . . . . . .Sent: Friday, July 18, 2003 4:11 PM

Subject: Mars Observations (July 16, 2003)

 

I made a series of Mars observations on this date using different instruments. The observations were made at a friend's observatory (Michael Palermiti, a noted optical designer and imager in Jupiter, Florida) using his 5.1" F/8 Off-Axis Parabolic reflector (a unique design which produces images equivalent to a high quality Apo refractor) and Intes Micro Alter M703 7" F/10 Maksutov-Cassegrain (first-rate optics) as well as my own custom 9" F/13.5 Maksutov-Cassegrain (built for me by Michael Palermiti). The seeing started as average (5-6/10) then later improved to good (7-8/10), fortunately while using the 9" F/13.5 Maksuov-Cassegrain. The following are my notes on the observations.

 

Left image:

Date (U.T.): July 16, 2003

Time (U.T.): 02:00

CM: 025.7

Ls 222.4, De -20.4, Ds -16.4, k 0.925, 19.34"

Instrument: 5.1" F/8 Off-Axis Parabolic Reflector Magnification: 130x

Filter: None

Seeing (1-10): 5-6, Antoniadi (I-V): III

Transparency (1-6): 3 (Intermittent clouds)

 

Notes:

The South Polar Cap (SPC) appeared brilliant (10/10), but no detail visible within. Mare Australe appeared as a dark (3/10) collar surrounding the SPC. Margaritifer Sinus appeared dark (3/10) towards the preceding (evening) limb adjacent to an extremely bright (9/10) evening limb haze (ELH). Mare Erythraeum appeared dark to dusky (3-4/10) with a dull to shaded (5-6/10) core (Protei Regio/Pyrrhae Regio?). Aurorae Sinus appeared dark (3/10) following the CM whereas a dusky (4/10) projection was noted along the northern border of Mare Erythraeum preceding it. Agathodaemon (Coprates) appeared as a thin, dark (3/10) projection from the NW corner of Mare Erythraeum. Bosporos Gemmatus appeared dark (3/10) with a thin, dusky (4/10) Nectar noted to project from it's following border connected a dark (3/10) Solis Lacus. Chryse-Xanthe appeared bright (7/10) without any detail visible within. Niliacus Lacus appears as a dark (3/10) wedge adjacent to an extremely bright (9/10) northern limb haze (NLH) connected a dusky (4/10) Nilokeras. An extremely bright (9/10) morning (following) limb haze is noted as well.

 

Center Image:

Date (U.T.): July 16, 2003

Time (U.T.): 02:30

CM: 033.1

Ls 222.4, De -20.4, Ds -16.4, k 0.925, 19.34"

Instrument: Intes Micro Alter M703 7" F/10 Maksutov-Cassegrain

Magnification: 162x

Filter: None

Seeing (1-10): 5-6, Antoniadi (I-V): III

Transparency (1-6): 3 (Intermittent clouds)

 

Notes:

The notes from my first observation apply to this one as well. Additional features observed are dusky (4/10) projections extending from the southern border of Solis Lacus and an extra dusky (4/10) projection noted along the northern border of Mare Erythraeum.

 

Right Image:

Date (U.T.): July 16, 2003

Time (U.T.): 10:00

CM: 142.7

Ls 222.4, De -20.4, Ds -16.4, k 0.925, 19.34"

Instrument: 9" F/13.5 Maksutov-Cassegrain

Magnification: 248x and 344x

Filter: None

Seeing (1-10): 7-8, Antoniadi (I-V): II

Transparency (1-6): 4 (Intermittent clouds)

 

Notes:

The South Polar Cap (SPC) appears brilliant (10/10) with a thin, dark (3/10) rift noted along it's northern border preceding the CM which connects to a dark to dusky (3-4/10) core. Mare Chronium appears as a dark (3/10) collar surrounding the SPC. Mare Sirenum is visible on the CM as a dark (3/10) wedge with thin dull (5/10) projections noted along it's northern border connecting a dull (5/10) thin albedo feature parallel to it. Phaethontis-Electris appears dusky to bright (4-7/10). Aonius Sinus-Phasis appears dusky to dull (4-5/10) and partially obscured by an extremely bright (9/10) evening (preceding) limb haze (ELH). Mare Cimmerium (eastern portion) appears dark (3/10) adjacent to an extremely bright (9/10) morning (following) limb haze (MLH).Tharsis, Memnonia, Amazonis, and Arcadia appear bright (7/10), but no orographic clouds noted. Diacria (4/10), Azania (4/10), and the Propontis complex (3/10) are noted over the north-following limb adjacent to an extremely bright (9/10). The western (following) border of Mare Acidalium is noted (3/10) projecting from the ELH.

 

The best of luck in your own observations and imaging of Mars.

 

Regards,


Carlos HERNANDEZ (Miami, FL, USA)

mars@ilcs.net


 Back to the LtE Home Page

 Jump to the LtE Archives

 

 Back to the CMO Home Page