2001 Mars Observation Reports -- #06--
OAA MARS SECTION
made during the period
from 16 March 2001 (131°Ls) to 15 April 2001 (146°Ls)
based on the article published in CMO #242 (25 April 2001)
by Masatsugu MINAMI, Director of the OAA Mars Section
The present report deals with the Mars observations made during the period from 16 March 2001 (131°Ls) to 15 April 2001 (146°Ls) and the following are the observers who contributed this time.
AKUTSU, Tomio (Ak) Karasuyama,
11 Sets of CCD Images (1, 5, 9, 11, 13 April 2001)
f/70 32cm speculum equipped with a Teleris 2
HERNANDEZ, Carlos E (CHr)
1 Set of Drawings (8 April 2001)
305, 355x 20cm Schmidt-Cassegrain
HIGA, Yasunobu (Hg)
22 Video images (21, 30 March; 10, 13 April 2001)
25cm F6.7 speculum equipped with Sony VX-1000
ISHADOH, Hiroshi (Id)
23 Drawings (15, 22, 30, 31 March; 1, 10, 12, 13 April 2001)
400, 530x 31cm speculum
MELILLO, Frank J (FMl)
2 CCD Images (24 March;14 April 2001)
20cm SCT equipped with a Starlight Xpress
MINAMI, Masatsugu (Mn)
84 Drawings (18, 19, 23, 27 March; 1, 3~7, 14, 15 April 2001)
400, 480, 600x 20cm refractor*
MORITA, Yukio (Mo) Hatsuka-ichi,
18 Sets of CCD Images (18, 21, 23 March; 12, 13, 15 April 2001)
f/50 25cm speculum equipped with an ST-5C
MURAKAMI, Masami (Mk)
17 Drawings (19, 20 March; 1, 4, 6, 11, 13, 15 April 2001)
320, 425x 20cm speculum
NAKAJIMA, Takashi (Nj)
35 Drawings (19, 24 March; 1, 3, 4, 5, 13, 15 April 2001)
375, 400x 20cm refractor*
NARITA, Hiroshi (Nr)
10 Drawings (11, 14, 20 March; 2, 5, 6, 12, 14, 15 April 2001)
400x 20cm refractor
Donald C (DPk)
14 Sets of CCD Images (24, 26 March; 3, 5, 6 10, 15 April 2001)
f/48~58 41cm speculum or 41cm
equipped with a Lynxx PC or an ST-237
TAN, Wei-Leong (WTn)
1 CCD Colour Image (12 April 2001)
f/16 28cm SC equipped with with an ST-7E
TEICHERT, Gérard (GTc)
1 Drawing (1 April 2001) 330, 310x 28cm Schmidt-Cassegrain
TSUNEMACHI, Hitomi (Ts)
18 Drawings (2, 13, 14, 15 April 2001)
360x 12.5cm Fluorite refractor
WASIUTA, Myron E (MWs)
13 Drawings (19, 20, 23, 25, 28 March; 5 April 2001)
360x 32cm speculum/ 470x 30cm refractor
wrongly recorded DPk's CCD camera in the preceding issue: The cooled CCD
camera Don PARKER (DPk) used in the previous period was a Celestron PixCel 237 (SBIC
ST-237) which was build on TI's TC-237.
We also missed to record some observations made in March:
On 6 Mar, HERNANDEZ (CHr) observed earlier than Hg at around LCM=175°W: Cerberus was evident, and Phlegra was caught dark but narrow. The dark band along Gyndes was broad that bounded the npc on the limb.
We also missed the record of the observations by MORITA (Mo):
On 8 Mar (128°Ls), Mo took ccd images at LCM=288°W, 298°W in which Hellas is bright in G and B while weak in R perhaps due to the poor seeing.
On 10 Mar (128°Ls), Mo obtained images at LCM=279°W & 284°W: Syrtis Mj is near at the CM, and Hellas is brighter in the order of B, G and R.
On 11 Mar (129°Ls), Mo took CCD sets of images at LCM=262°W, 269°W and 273°W: The first set is good, and the morning Hellas is bright in R also. In R, Cebrenia is light and the shadowy spot at Utopia is visible. Elysium, light in B, appears white in the colour composite.
On 15 Mar(131°Ls), Mo observed at LCM=230°W~ LCM=237°W and obtained a good set at LCM=233°W: In R Elysium and Cebrenia are equally light, but in G and B Elysium more prevails, so that Elysium is whiter. The Ætheria dark patch is evident and looks connected with the spike of M Cimmerium. In B, the f side is lighter, so that the morning Syrtis Mj appears blue in the composite.
16 ~ 31 March 2001
On 15 Mar (131°Ls), ISHADOH (Id) observed at LCM=246°W where the evening Elysium was much less light than
On 18 Mar (132°Ls, at the same season as we met when the planet was closest to the Earth in 1999), MINAMI (Mn) observed from LCM=151°W to LCM=209°W, and MORITA (Mo) took images at LCM=175°W, 185°W, 192°W, and 199°W. The south polar hood (sph) was large but not so bright. Tharsis was also dull except near the terminator. The area of Olympus Mons was suspected as a faint light spot. Cerberus-Phlegra was definite and the Ætheria dark patch was coming in the morning.
On 19 Mar (133°Ls), WASIUTA (MWs) observed at LCM=027°W (09:20GMT) ~ 047°W(10:40), where the nph was spotted small. Chryse dull. In
On 20 Mar (133°Ls), MWs observed at LCM=018°W, Mk at LCM=159°W(~178°W) and Nr at LCM=188°W.
On 22 Mar (134°Ls), Id observe at LCM=167°W where Olympus Mons was detected
On 23 Mar (135°Ls), MWs made a series of observations from LCM=345°W(9:00) to 003°W, where MWS did not feel the sph bright. Chryse-Xanthe in the f side was light. On the day, Mn observed from LCM=104°W to 162°W, where Xanthe-Tharsis was light near the evening terminator, and the following area of
On 24 Mar (135°Ls), MELILLO (FMl) took ccd images at LCM=347°W, where the sph looks light in R. On the day PARKER (DPk) also produced the images at LCM=348°W, and 357°W: DPk's Images (by the use of an ST-237) show all of the dark markings quite nicely. The sph appears however differently from different angles in R. There is a roundish light spot in the npr in R (De=2°N). The evening mist in Æria is thick. In
On 25 Mar (135°Ls), MWs observed at LCM=340°W, where a morning mist in Chryse.
On 26 Mar (136°Ls), DPk took images at LCM=317°W (by ST-237), 328°W (by Lynxx), 338°W (by Lynxx; 10:33 GMT). In the first, Hellas and
On 28 Mar (137°Ls), MWs observed four times from LCM=298°W to 327°W,
On 30 Mar (138°Ls), Hg took Video images from LCM=052°W to 091°W, and Id observed from LCM=055°W to 094°W (each five times): Id noticed that the sph was much downward, and the Video images also show the light sph. Both show Chryse was light near the evening terminator. At LCM=065°W, Id pointed out the irregularity inside the sph. Id saw slight brightness at the northern limb. Thirty minutes after the last drawing at LCM=094°W, Id noticed Alba was bright. Hg's image at LCM=091°W shows that Xanthe is white, and the sph looks to have become larger and thicker.
On 31 Mar (139°Ls), Id observed at LCM=045°W~065°W, where the sph looked to have come down to Argyre, but judged that it reduced its brightness compared with the case on the day before. The npc was visible on the northern edge.
1 ~ 15 April 2001
From 1 Apr to 15 Apr, every day somebody observed.
On 1 Apr (139°Ls), TEICHERT (GTc) observed in France at LCM=189°W, and in Japan, Nj and Mn in Fukui observed from LCM=009°W to 077°W, Ak took ccd at LCM=023°W & 032°W, Mk observed at LCM=046°W & 060°W, and Id at 080°W. The sph was bright and large, but varied its brightness and showed some condensation. The evening mist became more evident around from LCM=060°W to Chryse. The f limb side following M Acidalium near the spr was considerably bright. The npc was visible on the edge.
On 2 Apr (140°Ls), TSUNEMACHI made her first series of observations from LCM=024°W to 053°W: M Acidalium moved to the east and the following Tempe first looked whitish bright and then the white area were confined down to the npr. Nr observed at LCM=055°W, 065°W where M Acidalium was weak.
On 3 Apr (140°Ls), DPk produced superb ccd images at LCM=244°W & 260°W; the description of markings of the latter being perfect. The sph is bright in B, while
On 4 Apr (141°Ls), Nj+Mn watched from LCM=338°W to LCM=039°W, and Mk from LCM=346°W to 005°W: Mk described the sph was gray having a bluish white tint. Mk saw a long but narrow mist along the equatorial band from the evening Æria to the morning Xanthe. At Fukui we noticed that the sph was whiter than the Libya cloud and the mist following M Acidalium was also white at the f limb from LCM=350°W, though we could not chase it because the seeing was broken.
On 5 Apr (141°Ls), MWs observed at LCM=214°W, 224°W, 231°W; Syrtis Mj finally became apparent though the morning mist was thick at first. He noticed the sph and Hesperia. DPk made an important set of ccd shots at LCM=219°W: In R, two medium-sized roundish light patches at Ausonia (to be compared with the images taken the following day). An evening ebm is visible at a plain area from Amazonis/Memnonia to Zephyria. Phlegra is densely reddish. On the day, Nj and Mn at Fukui observed from LCM=329°W to 040°W, where the sph was dull in general, with some part gray but some bluish white. The evening mist at Æria was thick, and the morning mist at Chryse was bright but looked slightly off-white. Noachis/Deucalionis R looked reddish. After LCM=350°W, the white cloud was evident following M Acidalium. A light spot on the northern limb. Ak produced ccd images at LCM=349°W, 335°W, 015°W: At LCM=335°W, the sph is obvious in B. The limb mist from Chryse to the npr and the ebm at Æria are strong. Nr observed at LCM=027°W.
On 7 Apr (142°Ls), Mn repeated from LCM=308°W to LCM=018°W: The Libya
evening was so strong that it overflowed into Æria across Syrtis Mj. The
morning mist at Chryse was also thick but looked off
whitish. Chryse was however mistless
inside the disk. The
On 8 Apr (142°Ls), HERNANDEZ (CHr) made a set of drawings at LCM=188°W (+195°W): The slit at Cebrenia was obscure.
On 9 Apr (143°Ls), Ak produced ccd images at LCM=308°W, & 325°W: Cebrenia is ground-lit in R. The evening
On 10 Apr (144°Ls), DPk obtained a set of images at LCM=174°W where the sph shows a brighter part at Ausonia. The northern district is largely misty while under the mist a dark line including Propontis II is seen. A white orographic cloud is on the evening terminator: This must be a cloud following Ascræus Mons, and Olympus Mons is not yet so cloudy. In
On 11 Apr (144°Ls), at the Tokyo district, Mk observed at LCM=280°W~326°W, Ak at LCM=282°W, 292°W: These images by Ak as well as Mk's image at LCM=297°W proved that the Libya mist stayed from the evening terminator to the east coast of Syrtis Mj just like a strong ebm. Mk chased how this mist was squeezed by the rotation of Syrtis Mj: At LCM=326°W, Syrtis was almost concealed. Those drawings made earlier at LCM=307°W,& 316°W are also attractive: The southern area of Hellespontus was cut off by the sph. The sph was at Intensity 3, while
On 13 Friday Apr (145°Ls), a lot of observations were made by Mk, Hg, Ts, Mo, Id, Ak, and Nj:
Chronologically, at 259°W (Mk, Hg; at 16:40 GMT), 261°W (Ts),
262°W (Mo), 268°W (Hg), 269°W (Mo), 270°W (Ts), 271°W (Id, Ak, Ts), 277°W (Ak), 278°W (Hg), 279°W (Mo), 281°W (Id, Ts), 283°W (Mk), 290°W (Id, Ts), 292°W (Mo), 297°W (Hg), 298°W (Nj),
300°W (Id, Ts), 307°W (Hg, Nj),
310°W(Id), 317°W (Hg, Nj),
322°W (Id; at 21:00 GMT) (28 observations).
The separation of the sph from
On 14 Apr (146°Ls), FMl started from 8:30 GMT, and shot at LCM=129°W, 136°W, & 141°W, the last being by the use of Wr#47, and showing the sph. At
On 15 Apr (146°Ls), DPk took interesting ccd images at LCM=100°W & LCM=107°W: A sph branch is about to go down to the dark Solis L. The evening Xanthe was white, and as well the northern district is largely whitish misted. In Japan, Nj & Mn observed from LCM=228°W to LCM=296°W, Ts from LCM=241°W to 260°W, Mk from LCM=250°W to 279°W, and Mo at LCM=263°W, 275°W, 286°W, and Nr at LCM=293°W (23 drawings/images). Mk chased the ebm including the
n May, June and July, the CMO shall be published twice a month. The next issue shall review the observations made during a fortnight period from 16 April (146°Ls) to 30 April 2001 (154°Ls). Our CMO Internet Web-Site has a Gallery Page where some new Mars images are flashed before our reviewing. We hope every CCD image is emailed in a jpg file with a file name beginning with the observer's name to email@example.com as well as to firstname.lastname@example.org . Drawings are preferred to be sent in an A4 sized format with just one drawing on one sheet.
will be acknowledged if air-mailed to M MINAMI at Mikuni
(ask the mail-address through email@example.com ) .