2001 Mars Observation Reports -- #19--
OAA MARS SECTION
CMO Mars Observations
in the Second Half of December 2001 and the First Half of January 2002
from 16 December 2001 (292°Ls) to 15 January 2002 (310°Ls)
based on the article published in CMO #256 (25 January 2002)
Masatsugu MINAMI, Director of the OAA Mars Section
HIS is a 19th review of
the CMO Observations of the 2001 Mars, and treats the following period: 16 December 2001 (292°Ls) to 15 January 2002 (310°Ls)
during which the apparent angular diameter went down from 6.8" to
5.9" of arc, while the apparent declination went up from - 11.5° to -
1.5°: If the planet goes far west its altitude remains higher than before, and
hence the observable time is not yet so shortened. The central latitude was
from 25°S up to 26.5°S (maximal), and so the southern hemisphere faced
maximally toward us.
The weather in the
HE observations recorded this period are as follows: The telescope of MORITA came back from 1 January.
BIVER, Nicolas (NBv) Noordwijk,
11 Colour Drawings (1, 10# , 15 November; 7, 16, 23# , 30# , 31# December 2001)
300x 20cm speculum/ 510, 330x 26cm speculum#
5 Drawings (29 December 2001; 4, 9, 12, 13 January 2002) 400, 530x 31cm speculum
KUMAMORI, Teruaki (Km)
10 CCD Colour Images (19, 20, 26, 29 December 2001; 9, 12 January 2002)
60cm Cassegrain$ with a Sony TRV-900
3 CCD Images (19 December 2001; 12 January 2002)
20cm SCT with a Starlight Xpress MX5
28 Drawings (20, 26, 28, 29 December 2001; 7, 14 January 2002))
480, 400x 20cm Goto ED refractor*
MOORE, David M (DMr)
4 Sets of CCD Images (17, 26 December 2001; 2, 13 January 2002)
f/40 36cm F13.5 Cassegrain with a Starlight Xpress HX5
MORITA, Yukio (Mo) Hatsuka-ichi,
12 Sets of CCD Images (1, 4, 6, 12 January 2002)
f/50 25cm speculum equipped with an ST-5C
MURAKAMI, Masami (Mk)
20 Drawings (16, 20, 23 December 2001; 3, 6, 12, 14 January 2002)
320x 20cm speculum/300x 10cm Nikon ED refractor
Takashi (Nj) Fukui,
12 Drawings (28, 29 December 2001; 14 January 2002)
480, 400x 20cm Goto ED refractor*
9 Sets of CCD Images (17, 20, 28 December 2001; 14 January 2002)
f/44 41cm F/6 Newtonian equipped with a Lynxx PC
TEICHERT, Gérard (GTc)
4 Drawings (16 December 2001; 1, 2, 4 January 2002) 330, 350x 28cm SCT
TSUNEMACHI, Hitomi (Ts)
70 Drawings (16&, 19, 20, 22~24, 26~28, 30, 31 December 2001;
1, 4, 6, 10, 13, 14 January 2002)
500x 20cm refractor& / 360x 12.5cm Takahashi fluorite refractor
& Kanagawa-Ken Seishohnen Centre
LATTER half of December 2001
From Japan , we could trace the surface from Syrtis Mj eastward to S Meridiani: On 16 December (292°Ls), TSUNEMACHI (Ts) at Yokohama ended at LCM=327°W, and MURAKAMI (Mk) did at LCM=330°W, and one month later on 14 January (309°Ls), MINAMI (Mn) started from LCM=020°W, Ts did from LCM=034°W, and Mk from LCM=051°W, and so principally we were able to observe from LCM=330°W eastward to LCM=020°W:
Ts used a 20cm refractor at Yokohama on 16 December to detect a small, round spc surrounded by a shadowy area, and roundish Hellas.
Mk uses a 10cm equator to find the planet before the sunset, and so has no better resolution but the surface is still observable. On 23 December (296°Ls), changing at dusk to the 20cm spec at LCM=280°W, he caught a slim Syrtis Mj near the morning terminator.
ISHADOH (Id) only made an observations on 29 December (300°Ls) at LCM=225°W: The seeing was 4/10 without any serious details, and he thought the surface was not yet reddish but showed a tint of white yellow.
KUMAMORI (Km) also produced good images: On 19 December (293°Ls) at LCM=308°W & 318°W, the spc appeared very whitish bright though small and round. The area between
Overseas observations also gave good results: BIVER (NBv) took a drawing on 16
December (292°Ls) at LCM=114°W (17:45 GMT): The area of Solis L was complex.
Moving to Versailles, NBv then observed on 23
December (296°Ls) at LCM=036°W, 050°W where S Sabæus
was separated on the afternoon side and Auroræ S was
dark definite in the morning. On 30 December (300°Ls) at LCM=332°W, the dark
broad band from M Serpentis to Noachis
was observed in detail. The spc was dull. Finally on
31 December (301°Ls) at LCM=312°W (16:48 GMT, already the New Year in
FIRST half of January 2002
As the New Year came in , MORITA (Mo), who was long stuck because of a trouble of his telescope, became active again. His images on 1 January (301°Ls) at LCM=196°W are excellent. It may convey a white mist to the north of the eastern part of M Cimmerium. The CM angle is near those of DPk's images on 17 December and Km's images on 29 December, and may all give a hint to the west end problem of M Sirenum. Mo also took images on 4 January (303°Ls) at LCM=164°W, 171°W & 181°W. On 6 January (304°Ls) he met again better seeing and shot at LCM=139°W, 146°W, 166°W: The LRGB images show a strange dark patch on the northern hemisphere. The configuration of the dark markings on the southern hemisphere implies something new (together with DMr's images on 26 December). On 12 December (308°Ls) he took at LCM=084°W~103°W: In the Web only the IR images are shown.
Km started from 9 January (306°Ls) at LCM=102°W, and then took two images on 12 January (308°Ls) at LCM=061°W, & 077°W; All are good. Auroræ S is largely down to lower part of the disk. On the south, Argyre looks lighter. Solis L seems to have become larger and looks much recovered: It shows a light-brownish tint. Provisional measurement of its latitude tells us that it lies between 25°S and 33°S, and so looks located in a usual position (disregarding the longitudinal location).
The first of the New Year work abroad was given by DMr: His images on 2 January (302°Ls) at LCM=058°W were taken from 00:48 GMT
(still 1 January at Phœnix). The area of Auroræ S to M Erythræum is
largely dark, and the morning area at Solis L looks covered by a white mist.
DMr's images on 13 January (308°Ls) at LCM=308°W are also excellent. M Hadriacum goes down to Trinacria and the description of Syrtis Mj to Hellas looks interesting in G. FMl produced R images at LCM=276°W on 12 January (308°Ls): Ausonia is bright at the p-limb. Finally DPk produced excellent images on 14 January (309°Ls) at LCM=272°W~282°W: The new aspect of Ausonia is well shown, it being reddish light down to Trinacria. M Hadriacum has a singular aspect. The band from Promethei S to M Australe is quite dark. The morning
The visual observations carried in Japan in the
New Year are as follows:
Ts observed on 1 January 2002 (301°Ls) at LCM=173°W (8:00 GMT)~212°W, and watched attentively the spr. She also depicted a new configuration of M Sirenum. On 6 January (304°Ls), the seeing was moderate, and watched the area of Dædalia at LCM=124°W and so on. The observations on 13 January (308°Ls) and 14 January (309°Ls) show that the dark areas from M Erythræum to Auroræ S largely occupied the surface.
Mk started from 3 January (303°Ls). On 6 January (304°Ls) at LCM=111°W~141°W he observed the dark band from Dædalia to M Sirenum. On 14 January (309°W) around LCM=051°W, the area around Auroræ S made a bottom of a V shaped large dark marking.
Id began from 4 January (303°Ls): The spc was visible but not clear. On 13 January (308°Ls) at LCM=084°W, he scarcely detected Solis L separated from the preceding Auroræ S.
Hokuriku district suffered from bad weather, and the first cloudless sky came late on 7 January (305°Ls), but images were poor due to a gale. The second clear sky visited on 14 January (309°Ls) and Nj and Mn started 15:10 JST before sunset: on the evening of the day we watched from LCM=020°W (Mn) to LCM=083°W (Nj) tracing from the area of
Note D MOORE has changed the camera: The instrument used by DMr on 2 December (#254) should read the Starlight Xpress HX5.
We received MC (ALPO Mars Section Newsletter) #24 (on 11 Jan) and #26 (on 22 Jan) from Dan TROIANI: #18 and #19 were received before. We note also R McKIM kindly sent us "BAA Section Circular 2001 December" on 12 December 2001.
HE next report in #247 deals with the observations during a one-month period from 16 January 2002 (310°Ls) to 15 February 2002 (327°Ls).
Reports will be
acknowledged if air-mailed to M MINAMI at Mikuni
(ask the mail-address through firstname.lastname@example.org ) .