LtE in CMO #250

From Don PARKER

@. . . . . . Attached are Mars images from today. Note that the outlines of Meridiani S., Sabaeus S., Deucalionis, and Margaritifer S. are barely visible through the dust.

Have also attached some overdue drawings. Of interest are the ones from 8 July and 9 July, showing the rapid obscuration of Meridiani S. Best,

(12 August 2001 email)

>  MARS IMAGES 12 AUGUST, 2001

>  by D.C. Parker, Coral Gables, FL.  Lynxx PC camera    16-in (41cm) F/6 NEWTONIAN

>            Eyepiece Projection @ f/44.2

>            Integration Times:

>    BLUE (Koheisha, 445nm peak central; BWHM 105nm)   2.60-3.20s

>    GREEN (Koheisha, 540nm peak central; BWHM 75nm)   0.88s

>      RED (RG610 - No IR Rejection)                     0.18s

>                        Images flat and dark corrected.

>Seeing poor (3-4, Pickering). Transparency fair (4m) with frequent clouds and haze.

>Wind E 0-10 kts., gusty. Altitude = 37-35 degrees. No dew.

>Dust persists, obscuring much of the planet. Acidalium M. is largely obscured.

>NOTE: Meridiani S., Sabaeus S., Pandorae Fr., and Margaritifer S. all faintly vivible beneath dust. Ghostly appearance!

>Bright evening limb arc and S. polar clouds. SPC visible. NPH very dull, broken.

 

@ . . . . . . . . . . Here are some more dusty Mars images. Best 

(15 August 2001 email)

>  MARS IMAGES 13 AUGUST, 2001

>   by D.C. Parker, Coral Gables, FL.  Lynxx PC camera  16-in (41cm) F/6 NEWTONIAN

> Eyepiece Projection @ f/44.2

> Integration Times:

> BLUE (Koheisha, 445nm peak central; BWHM 105nm) 2.28s

> GREEN (Koheisha, 540nm peak central; BWHM 75nm) 0.70s

> RED (RG610 - No IR Rejection)                   0.16s

> INFRARED (750-825nm)                            2.34s     

>  Images flat and dark corrected.

>Seeing fair (6-7, Pickering) Transparency variable (0-5m) between fast cumulus clouds. Wind E-ENE 2-11 kts.

>Altitude = 37 degrees. No dew.

> Dust persists, obscuring most of the disk. Bright PM limb arc and south polar clouds.

>SPC visible. NP hood disorganized, weak in blue light.

>The outline of Meridiani S. on C.M., but Sabaeus S.appears distorted except in IR.

>Deucalionis wide. Anomalous albedo features.

 

@ . . . . . . . . . . Here are some Mars images from this morning. The albedo features are somewhat more visible. Best            

(20 August 2001 email)

>  MARS IMAGES 19 AUGUST, 2001

>  by D.C. Parker, Coral Gables, FL.  Lynxx PC camera  16-in (41cm) F/6 NEWTONIAN

>            Eyepiece Projection @ f/44.2

>            Integration Times:

>    BLUE (Koheisha, 445nm peak central; BWHM 105nm)   2.40s

>    GREEN (Koheisha, 540nm peak central; BWHM 75nm)   0.72s

>    RED (RG610 - No IR Rejection)                     0.17s

>    INFRARED (750-825nm)                              2.56s     

>                    Images flat and dark corrected.

>Seeing good (7-8, Pickering) Transparency good (4.5-5m). Wind ENE 3-9 kts.

>Altitude = 37 degrees. No dew.

 

>Dust persists, however albedo features appear somewhat stronger. Syrtis Major,

>Sabaeus S., Deltonon, and Tyrhennum M. are normal in outline.

>Dust persists in Hellas, especially bright in infrared, although some

>features on the floor of the Hellas basin are discernible.

>Bright PM limb arc. NP hood disorganized, very weak in blue light.

 Donald C PARKER (Miami, FL, USA)

dparker@netside.net

dcpmiami@earthlink.net

 Back to the LtE Home Page

 Jump to the LtE Archives