2001 Mars Observation Reports -- #20--
OAA MARS SECTION
CMO Mars Observations
in the Second Half of January 2002 and the First Half of February 2002
from 16 January 2002 (310°Ls) to 15 February 2002 (327°Ls)
based on the article published in CMO #257 (25 February 2002)
Masatsugu MINAMI, Director of the OAA Mars Section
ERE we deal with the period from
16 January 2002 (310°Ls) to 15 February 2002 (327°Ls)
which the apparent angular diameter went down from 5.9" to 5.1". It
was not so hopeless still because the apparent declination was increasing (it
went up across the celestial equator from -1.3° to 7.8° during the period). The
problem was rather the winter weather. The central latitude was down from
26.5°S to 24°S. The phase angle was also down from 37° to 32°.
HE activity of Don
PARKER (DPk) is still remarkable. The Japanese observations
turned less active, but KUMAMORI (Km)'s images proved good.
We hear the weather was unstable even in the districts facing to the
ISHADOH, Hiroshi (Id)
6 Drawings (30, 31 January; 3, 4, 6, 13 February 2002)
400, 530x 31cm speculum
KUMAMORI, Teruaki (Km)
9 CCD Colour Images (19, 24 January; 1, 6, 15 February 2002)
60cm Cassegrain# with a Sony TRV-900
Frank J (FMl)
1 CCD Images (26 January 2002)
20cm SCT with a Starlight Xpress MX5
MINAMI, Masatsugu (Mn)
26 Drawings (19 January; 4, 6, 13, 15 February 2002)
600, 480, 400x 20cm ED Goto refractor *
MOORE, David M (DMr)
2 Sets of CCD Images (26 January; 12 February 2002)
f/40 36cm F/13.5 Cassegrain with a Starlight Xpress HX5
MORITA, Yukio (Mo) Hatsuka-ichi,
8 Sets of CCD Images (22 January; 1, 3, 9, 12, 15 February 2002)
f/50 25cm speculum equipped with an ST-5C
MURAKAMI, Masami (Mk)
3 Drawings (9, 10 February 2002)
300x 10cm ED Nikon refractor
PARKER, Donald C (DPk)
10 Sets of CCD Images (18, 21, 25, 28 January; 2, 3 February 2002)
f/44 41cm F/6 Newtonian equipped with a Lynxx PC
PEACH, Damian A (DPc)
1 Set of CCD Images (15 February 2002)
f/29 31cm Meade SCT with an ST-5C
TSUNEMACHI, Hitomi (Ts)
4 Drawings (23 January 2002)
360x 12.5cm Takahashi fluorite refractor
Observations from the
Don PARKER (DPk) at
Florida made observations on 18 January (312°Ls) at ω=228°W, 231°W, and 234°W where M
Cimmerium is wholly shot. Hesperia and M Tyrrhenum look classical. Eridania
shows its surface colour. M Chronium
and M Hadriacum are dark evident. The dark marking at Ætheria is rather large
(it was before shot on DPk's images on 11 December at ω=237°W - #254
p3190). Is it similar to the scale in 1975?
On 21 January (313°Ls), DPk observed at ω=201°W & 208°W where Scamander separates Electris and Eridania. The spc is dull, and unseen in B. The spc is not distinct also on the DPk images on 25 January (316°Ls) at ω=165°W where M Sirenum and M Cimmerium are shown connected.
On 28 January (318°Ls) DPk made his B day's shot at ω=135°W & 139°W: The former is associated with a grid system, and this proves the latitude of Solis L is located between 20°S~30°S: Solis L looks separated independently from the following Dædalia new dark band. The longitude is around 085°W. The spc is still not distinct.
Erratum: We are sorry for an irrecoverable mistake of the
date on this image in the printed version of CMO #257 (at p3252): The date
should read 28 Jan 2002 (on Don's Birthday).
On 2 February (320°Ls) the DPk images were made at ω=108°W & 111° and the area of Solis L reminds us of the singular aspect observed in 1877 (see TROUVELOT's drawing in ANTONIADI's book p138, Fig 79). It will be quite exciting if the aspect continues to be shown in 2003. DPk's images on 3 February (320°Ls) are also good at ω=090°W (+091°W), 095°W. Agathodæmon with Melas L is visible. Argyre is light near the limb. The spc looks to shine.
On 26 January (315°Ls), Dave MOORE (DMr) in
On 12 February (325°Ls) DMr produced images at ω=017°W: The dark band runs as before from M Serpentis to M Erythræum.
The weather was generally poor at
C. KUMAMORI (Km) on 19 January (312°Ls) produced an composite image at ω=011°W:
TSUNEMACHI (Ts) made her last series of observations on 23 January (314°Ls) at ω=315°W~344°W (10:00 GMT): The slim Syrtis Mj and the round
Km gave a series of good images on 24 January (315°Ls) at ω=300°W, 311°W, 320°W, & 333°W: At ω=300°W, Syrtis Mj is nearly at the centre and Hellas round. At ω=311°W, Zea L is visible inside
ISHADOH (Id) observed on 30 January (318°Ls) at ω=289°W, and on 31 January (319°Ls) at ω=272°W: Syrtis Mj seems to be seen but the contrast is low. M Hadriacum was checked?
Km took images on 1 February (319°Ls) at ω=230°W & 237°W where the
morning Hesperia is whitish misty. The latter is good and depicts the shadowy
area in Ætheria quite large. M Cimmerium was perfect, and M Chronium
was quite dark.
Id observed on 3 February (321°Ls) at ω=235°W, ω=242°W, but the seeing was poor because the time was slightly late.
On 6 February (322°Ls), Km shot at ω=186°W (8:46 GMT): Km informed us that the seeing was very poor, but the image composed looks strange in the sense that M Sirenum splits into two and a dark band goes to the south from the preceding area of M Sirenum. At Fukui, Mn watched at ω=183°W, but any abnormality of M Sirenum was not checked in particular, while the north of M Sirenum was very bright near the limb (this is shown also in Km's image). A shadowy segment went down northward from the western part of M Sirenum. M Cimmerium showed a tint of brown. From ω=193°W, Electris-Eridania looked covered by a morning mist. The eastern limb of the continent zone was also light. The spc was dull. Id watched at ω=210°W: The seeing was not very poor, but just M Cimmerium was checked. Mn observed until ω=222°W where the morning area of the continent zone was misty.
MURAKAMI(Mk) could observe on 9 February (324°Ls) at ω=156°W, and on 10 February (324°Ls) at ω=151°W & 161°W ( the apparent angular diameter being 5.2") and recorded the dark band of M Cimmerium and the brightness of the northern afternoon side.
At Fukui, Mn observed on 13 February (326°Ls) from ω=114°W (to ω=143°W) and on 15 February (327°Ls) from ω=065°W (to ω=123°W) and could aim at the area of Solis L. Compared with the definite darkness of the area of Auroræ S, Solis L was not so vivid, while at ω=094°W (just the Sun set), Solis L and the Dædalia band became evident at 600x. The spc was also distinct (at 327°Ls) and its preceding limb area was also light. A morning mist to the south of Dædalia.
Km made a composite image on 15 February at ω=087°W: Solis L is shown (this is more evident on the image on the following day 16 February at ω=083°W to be reported in the next issue). Id observed on 15 February at ω=151°W where Solis L remained near the afternoon limb.
MORITA (Mo) tried several times to produce images; but he could not usually begin earlier and so his most times were after the seeing was broken. However those made on 3 February (320°Ls) (Sunday) at ω=226°W, and on 9 February (324°Ls)(Sat) at ω=190°W were rather moderate.
We received a set of images of Damian PEACH (DPc) made on 15 February (325°Ls) at 17:45 GMT when the altitude of the planet was high up at 38°. The images show the surface at ω=229°W, where the spc is distinct though small, and M Cimmerium was shown in contrast with the light continent to its south. The dark area in Ætheria is shot here as a small but very distinct spot. A shadowy area goes down from the west of M Sirenum.
We further received as follows:
43 CCD Images (28, 29, 31 May; 2, 4~11, 18~21, 25, 27~30 June;
3~9, 11~15, 26 July 2001)
f/62 25cm F/6.7 spec with Nikon 950
PARKER, Donald C (DPk)
1 Set of CCD Images (14/15 November 2001)
f/44 41cm F/6 spec with Lynxx PC
DPk sent us a set taken on 15 November (161°Ls) at ω=166°W where the dark band of M Sirenum and M Cimmerium winds. The spc was quite large yet. The apparent angular diameter =8.1".
HE next report in #258 deals with the observations during a one-month period from 16 February 2002 (328°Ls) to 15 March 2002 (342°Ls).
Reports will be
acknowledged if air-mailed to M MINAMI at Mikuni
(ask the mail-address through firstname.lastname@example.org ) .