Mars Observation (October 11, 2005)Posted By Carlos E. Hernandez |
I made a pair of observations of Mars on October 11, 2005 (05:30 and 06:15 U.T.) under average to good (6-7/10) seeing conditions. A wealth of detail was visible over the Martian disk that was almost impossible to render. The Solis Lacus region was very complex as depicted. A W-cloud was noted over the Tharsis region, especially in blue light (Wratten 38A). I welcome any comments that you may have on my observations.
Date (U.T.): October 11, 2005
Time (U.T.): 05:30 (left image) and 06:15 (right image)
CM: 110.4 (left image) and 121.3 (right image)
Ls: 304.2 (Mid-Northern Winter/Southern Summer)
De -11.1, Ds -20.3, p 0.96, 19.03"
Instrument: 9" F/13.5 Maksutov-Cassegrain
Magnification: 248x and 374x
Filters (Wratten): 30 and 38A
Seeing (1-10): 6-7, Antoniadi (III-II)
Transparency (1-6): 4-5
Notes:
05:30 U.T. (Left image, IL/W30): The South Polar Cap (SPC) was very small and brilliant (10/10) surrounded by a dark (3/10) collar. Mare Australe appeared dusky to dull (4-5/10) and mottled. Solis Lacus was visible towards the preceding limb and appeared dark to dusky (3-4/10) with northern (Geryon (5/10) and Calydon (4/10)) and southern (Ambrosia (5/10) and Bathys (4/10)) projections over Thaumasia (7/10). Nectar (3/10) was visibly connecting Solis Lacus to Mare Erythraeum (3-4/10). Agathodaemon (Coprates) was visible as a dark (3/10) projection from the preceding limb connecting to a partially obscured, by clouds/haze (8/10), Tithonius Lacus (Melas Lacus (4/10) and Noctis Lacus (5/10); also comprising Echus Lacus, Hebes Lacus, and Ius Lacus which were not visible). Bosporos Gemmatus was dark to dusky (3-4/10) with condensations. Aonius Sinus (3/10) was visible on the CM with Phasis (4/10) projecting to the north. Phasis appeared to connect to a curvilinear and dusky (4/10) band from Tithonius Lacus which then completed a ring complex surrounding Solis Lacus. Daedalia appeared bright (7/10) between Phasis and Araxes (5/10). Mare Sirenum was visible following the CM and appeared dark to dusky (3-4/10). Sirenum Deprresio appeared a dark (3/10), circular albedo feature over the south-following border of Mare Sirenum. Phaethontis appeared bright to very bright (7-8/10) south of Mare Sirenum. The western (following) border of Mare Acidalium (5/10) was partially obscured by clouds/haze (8-9/10). Tharsis appeared shaded to bright (6-7/10). Arcadia and Amazonis appeared dusky to dull (4-5/10) and very mottled. A bright (7/10) patch was noted within this region which may represent the area of Olympus Mons (no specific brightening was noted over this area using the blue filter(W38A)). Dusky to dull (4-5/10) albedo features were noted over (or visible through) a semi-transparent North Polar Hood (NPH, 8-9/10). Thin and extremely bright (9/10) morning and evening limb hazes (MLH and ELH) were noted as well.
06:15 U.T. (Right image, W38A): The South Polar Cap (SPC) appeared small and brilliant (10/10). Solis Lacus and Mare Sirenum were visible as dull (5/10) albedo features. A very bright (8/10) W-cloud was noted over Tharsis, north of the Tithonius Lacus complex. Arcadia and Amazonis appeared to be obscured by a very bright to extremely bright (8-9/10) haze. Extremely bright (9/10) morning limb haze (MLH) and evening limb haze (ELH) were visible as well.
The best of luck in your own imaging and observations of Mars.
Regards,
Carlos E. Hernandez
Date (U.T.): October 11, 2005
Time (U.T.): 05:30 (left image) and 06:15 (right image)
CM: 110.4 (left image) and 121.3 (right image)
Ls: 304.2 (Mid-Northern Winter/Southern Summer)
De -11.1, Ds -20.3, p 0.96, 19.03"
Instrument: 9" F/13.5 Maksutov-Cassegrain
Magnification: 248x and 374x
Filters (Wratten): 30 and 38A
Seeing (1-10): 6-7, Antoniadi (III-II)
Transparency (1-6): 4-5
Notes:
05:30 U.T. (Left image, IL/W30): The South Polar Cap (SPC) was very small and brilliant (10/10) surrounded by a dark (3/10) collar. Mare Australe appeared dusky to dull (4-5/10) and mottled. Solis Lacus was visible towards the preceding limb and appeared dark to dusky (3-4/10) with northern (Geryon (5/10) and Calydon (4/10)) and southern (Ambrosia (5/10) and Bathys (4/10)) projections over Thaumasia (7/10). Nectar (3/10) was visibly connecting Solis Lacus to Mare Erythraeum (3-4/10). Agathodaemon (Coprates) was visible as a dark (3/10) projection from the preceding limb connecting to a partially obscured, by clouds/haze (8/10), Tithonius Lacus (Melas Lacus (4/10) and Noctis Lacus (5/10); also comprising Echus Lacus, Hebes Lacus, and Ius Lacus which were not visible). Bosporos Gemmatus was dark to dusky (3-4/10) with condensations. Aonius Sinus (3/10) was visible on the CM with Phasis (4/10) projecting to the north. Phasis appeared to connect to a curvilinear and dusky (4/10) band from Tithonius Lacus which then completed a ring complex surrounding Solis Lacus. Daedalia appeared bright (7/10) between Phasis and Araxes (5/10). Mare Sirenum was visible following the CM and appeared dark to dusky (3-4/10). Sirenum Deprresio appeared a dark (3/10), circular albedo feature over the south-following border of Mare Sirenum. Phaethontis appeared bright to very bright (7-8/10) south of Mare Sirenum. The western (following) border of Mare Acidalium (5/10) was partially obscured by clouds/haze (8-9/10). Tharsis appeared shaded to bright (6-7/10). Arcadia and Amazonis appeared dusky to dull (4-5/10) and very mottled. A bright (7/10) patch was noted within this region which may represent the area of Olympus Mons (no specific brightening was noted over this area using the blue filter(W38A)). Dusky to dull (4-5/10) albedo features were noted over (or visible through) a semi-transparent North Polar Hood (NPH, 8-9/10). Thin and extremely bright (9/10) morning and evening limb hazes (MLH and ELH) were noted as well.
06:15 U.T. (Right image, W38A): The South Polar Cap (SPC) appeared small and brilliant (10/10). Solis Lacus and Mare Sirenum were visible as dull (5/10) albedo features. A very bright (8/10) W-cloud was noted over Tharsis, north of the Tithonius Lacus complex. Arcadia and Amazonis appeared to be obscured by a very bright to extremely bright (8-9/10) haze. Extremely bright (9/10) morning limb haze (MLH) and evening limb haze (ELH) were visible as well.
The best of luck in your own imaging and observations of Mars.
Regards,
Carlos E. Hernandez