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Marswatch

1998-1999 Apparition

Linking Amateur and Professional Mars Observing Communities.

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Images - 1999 April 1-10
    (All times U. T. - Images not to scale. Click on image for more or larger scale views where available.)



1

1999-04-01 DCP Image of Mars Donald C. Parker, Coral Gables, Florida
Lynxx PC camera 16-in (41cm) f/6 Newtonian, Eyepiece Projection @ f/47.8

Integration Times:
   Red (RG610 - No IR Rejection)   0.43s
   Integrated (No IR Rejection)    0.30s
Images flat and dark corrected.
Seeing good (6-7) despite high winds. Transparency good (5m) between clouds; Terrible Conditions: E to ESE Winds 8-23 knots, frequent low cumulus and altostratus clouds.
Unable to obtain green and blue images due to wind. In red and integrated light Mars appears normal. No evidence of dust. Solis Lacus, Tithonius complex, Ganges and Nilokeras display "normal" intensities for the season; Aurorae S. not especially dark but appears much as it did at the end of February. Juventae Fons, Baetis visible.

1999-04-01 DF Image of MarsDenis Fell, New Sweden, Alberta, Canada (113.16°W, 52.55°N), email:dfell@telusplanet.net
Astrovid 1000 CCD camera, 8-in (20cm) f/10 SCT, Negative projection f/20, #21 orange filter. Processed with Snappy and Micrografx Photomagic.

06:24 UT, CM: 74°. (left)
07:50 UT, CM: 68°. (right)
Seeing Antoniadi III-IV, Martian diameter 14.12", De: 15.67, Phase .97

Darkest feature Mare Acidalium and Solis Lacus. Bright areas noticed over Chryse and Tharsis South is up.


2

1999-04-02 AJC Image of Mars António Cidadão, Oeiras, Portugal
ST-5C camera 10-in (25cm) f/10 Schmidt-Cassegrain

For color work I use a SBIG's motorized filter wheel equipped with their old RGB filter set (which needs IR-blocking filters; the transmitance curves for the filters are posted at their web page).

1999-04-02 CEH Drawing of Mars Carlos E. Hernandez (A.L.P.O. Mars Section)
8-inch (20-cm) f/7.5 Newtonian reflector at 328x and Wratten 23A, 30, 38A and 58 filters.

05:30 UT (CM: 54.7°, left), 06:30 UT (CM: 69.3°, right),Ls: 118.4°, De: 15.4°; Dia: 14.1").

A red and blue-green light (Wratten 23A and 64) observation on the left. The North Polar Cap (NPC) appears small and brilliant (10/10) surrounded by a thin, dusky (4/10) collar and either haze or a NPC remnant. Mare Acidalium appears ark (3/10) and prominent preceding (p.) the CM with a very bright (8/10) cloud visible over Tempe which appears to project to the east over Achillis Pons (7-8/10). Niliacus Lacus appears dark (3/10) as well with Achillis Fons and Idaeus Fons along it's following (f.) border. Nilokeras appears dark to dusky (3-4/10) projecting from the f. border of Niliacus Lacus. Lunae Lacus appears to be obscured by a very bright (8/10) haze (cloud) extending from the Chryse-Xanthe region. Oxia Palus is visible as a dark (3/10), oval-shaped albedo feature adjacent to the p. (or evening) limb. Margaritifer Sinus appears dark (3/10) as well as Mare Erythraeum (appearing mottled when the seeing steadies). Aurorae Sinus appears dark (3/10) towards the CM with what appears to be Baetis and Juventae Fons projecting from it's northern border. Another dark (3/10) projection is visible from the northern border of Mare Erythraeum (p. half) which may represent Hydaspis. Eos appears as a bright (7//10) bay along Mare Erythraeum's northern border. Agathodaemon (Coprates) appears as a dark (3/10) projection from Aurorae Sinus with Tithonius Lacus projecting from it's f. border. Nectar and Solis Lacus (3/10) are visible north of an extremely bright (9/10) south polar hood (SPH). The preceding end of Araxes is visible over the Sf. limb. Nilus (5/10) and Ceraunius (4/10) are visible over northern Tharsis. Arcadia appears dark to dusky (3-4/10) adjacent to an extremely bright (9/10) morning limb haze (MLH). An extremely bright (9/10) evening limb haze (ELH) is visible as well.

A blue light (W38A) observation made on the same date and instrument. A very bright to extremely bright (8-9/10) cloud is visible over the Chryse-Xanthe region apparently connecting to a similar cloud over the Tharsis region. Extremely bright (9/10) limbs are noted as well. A blue clearing (0-3) of 2 was noted at this time.

1999-04-02 M_DiS Image of MarsMaurizio Di Sciullo, Coconut Creek, Florida; E-mail: NimbusSky@worldnet.att.net
Starlight Xpress HX-516 CCD camera; 10" (25 cm) Excelsior Optics E-258 f/8 Newtonian, Eyepiece Projection @ f/48

Integration Times:
   400 - 510 nm:   0.20s
   490 - 590 nm:   0.15s
   610 - 720 nm:   0.22s
All images acquired with 700 - 1200+ nm block filter inline with eyepiece projection unit, True Technologies Dichroic Filters + IR block
No dark frame, flat fielding or bias correction applied. Camera operated in "Binned" (low-res) mode. All images are single frames, no co-addition or averaging performed, except for composite color image.

Seeing: 8-9/10, wind; calm, heavy humidity (> 95%).
Significant detail in the 400 - 510 nm band. Most obvious feature is group of 3 distinct cloud cells stretching from latitude 23, longitude 120, to latitude 8, longitude 98, in arcing pattern. Southernmost cell is largest, most clearly separated from its neighboring structures. These features are also visible in the 490 - 590 nm band. Possible CO2 crystals?? Simple H2O?? Second large section of detail in same band (400 - 510 nm) tracing out oval between Oxus, Oxia Portus, Chryse, Margaritifer Sinus, and Sinus Meridiani. Separate distinct spot over Oxus, detached from previously described oval, reminescent of features observed on 25/12/1998. Limb haze stretching from Mare Erythraeum (lat -49, long 22) to Chrysokeras (lat -46, long 120), breaking at that point, then starting again in roughly Mare Sirenum's location (lat -32, long 126), arcing up to almost exactly Nix Olympica's coordinates. Possible dust storms observed at latitude 44, longitude 82 (Tempe region), and latitude 41, longitude 103 (Arcadia region). Small, faint, hot-spots observed at those locations in all bands, and in composite image as small, brighter red spots.

1999-04-02 DCP Image of Mars Donald C. Parker, Coral Gables, Florida
Lynxx PC camera 16-in (41cm) f/6 Newtonian, Eyepiece Projection @ f/47.8

Integration Times:
   Blue (BG12 + IR Rejection)   10.00-12.50s
   Green (VG9 + IR Rejection)    4.13s
   Red (RG610 + IR Rejection)   0.44s
Images flat and dark corrected.
Seeing: fair to good (4-7). Transparency: 4.5-5.0m. Light wind (0-3 knots). No dew.
Clouds over Chryse, Xanthe, Ophir-Candor, and Tharsis. Morning limb haze. No dust observed. Moderate violet clearing. Note dark feature in blue light in vicinity of Olumpus Mons.

1999-04-02 TS Drawing of Mars Ted Stryk
4.5-in (11.5 cm) f/9 Newtonian, #25 and #80A filters

08:15 UT
Seeing 2. Transparency 1.
Unfortunatly, serious telescope problems, which have kept me from observing for a month, cut my observing session short after I had only begun to draw. I didn't even get to use filters. To make matters worse, the seeing was horrid, and it was very foggy. However, I was able to pick out the general dark features in south, and Mare Acidalium in the north, and the polar cap. Also, some very bright clouds were visible on the limb over presumably Tharsis. Nothing more was seen before my observing session's premature end. Any other apparent features are products of the fact that I had just begun to lay down a preliminary sketch before my telescope collapsed.

1999-04-02 VGT Image of Mars Victor G. Tejfel, Laboratory of Lunar and Planetary Physics, Fessenkov Astrophysical Institute, Alma-Ata, Kazakhstan; E-mail: tejf@hotmail.com
ST-6V CCD camera; 24-in (60 cm) Cassegrain.


3

1999-04-03 AJC Image of Mars António Cidadão, Oeiras, Portugal
ST-5C camera 10-in (25cm) f/10 Schmidt-Cassegrain

For color work I use a SBIG's motorized filter wheel equipped with their old RGB filter set (which needs IR-blocking filters; the transmitance curves for the filters are posted at their web page).

1999-04-03 N_F Image of Mars Nelson Falsarella, Sao Jose do Rio Preto, SP, BRAZIL; E-mail: nfalsarella@riopreto.com.br
International Mars Patrol, Rede de Astronomia Observacional, REA-Brazil
AVA ASTROVID 400 CCD Videocamera; 8-in (20cm) f/6.5 Newtonian, Eyepiece Projection with a MEADE Series 3000 Plossl 5mm.

1999-04-03 RJN Images of Mars Ricardo Nunes, Lisbon, Portugal, E-mail: mop23816@mail.telepac.pt
Black & White QuickCam with adaptations, 4.5 inch Equatorial Reflector

Each image is the average of about 20 individual frames.

The color composites were made using a unfiltered image (infrared filtered removed) and one taken through the infrared blocking filter that comes with the QuickCam. The first image is coded as Red and and the second as Green/Blue. When assembled in such a way in Photoshop they provide, once the color balance has been adjusted, a convincent color image. But some caution should be necessary on the interpretation of results.

Due to the equipment used the images need a lot of processing to bring out details. Also the camera's dinamic range is small (6 bits) leading to the presence of some noise in the final images. These constraints mean that small features in the images are to some extent camera and processing artefacts. Nevertheless large features as Syrtis Majoris are clearly visible and reasonably well defined.

1999-03-20 MJZ Drawings of Mars Mike Zweifel, Racine, Wisconsin; 88.02861° W 44.72889° N; E-mail: rasastro@wi.net
14-in (36cm) f/10 Schmidt-Cassegrain, 44x, Red Filter.

Ls: 118.8°; De: 16.4°; Diameter: 12.5”
03:10 U.T.;  CM:   11.5°;  Seeing: 3
06:23 U.T.;  CM: 257.79°;  Seeing: 4.5
Transparency: (1m).

1999-04-03 DCP Image of Mars Donald C. Parker, Coral Gables, Florida
Lynxx PC camera 16-in (41cm) f/6 Newtonian, Eyepiece Projection @ f/47.8

Integration Times:
   Blue (BG12 + IR Rejection)   9.25-13.00s
   Green (VG9 + IR Rejection)    3.75-4.63s
   Red (RG610 + IR Rejection)   0.44s
Images flat and dark corrected.
Seeing: excellent (8-10). Transparency: 4.5m with high haze. No wind. Light dew.
Clouds over Chryse, Xanthe, Ophir-Candor, and Tharsis. Morning limb haze. No dust observed. Moderate violet clearing also noted visually with Wratten-47 filter. NPC rift detected on numerous red-light images in position of Chasma Borealis. This suggests a larger than expected North Polar Cap for the season.

1999-04-02 M_DiS Image of MarsMaurizio Di Sciullo, Coconut Creek, Florida; E-mail: NimbusSky@worldnet.att.net
Starlight Xpress HX-516 CCD camera; 10" (25 cm) Excelsior Optics E-258 f/8 Newtonian, Eyepiece Projection @ f/48

Integration Times:
   400 - 510 nm:   0.20s
   490 - 590 nm:   0.15s
   610 - 720 nm:   0.22s
All images acquired with 700 - 1200+ nm block filter inline with eyepiece projection unit, True Technologies Dichroic Filters + IR block
No dark frame, flat fielding or bias correction applied. Camera operated in "Binned" (low-res) mode. All images are single frames, no co-addition or averaging performed, except for composite color image.

Seeing: 8-9/10, with periods of laminar flow. Wind: calm, heavy humidity (> 90%).
Somewhat less detail in 400 - 510 nm band than in observation of 2 April 1999, at approximately 07:00 UTC. Trio of clouds observed near latitude 23°, longitude 120° on 2 April 1999 seem to have diffused into two separate structures; prominent spot at roughly latitude 10°, longitude 109°, and an "S" shaped structure immediately to the northwest of the previously described spot. These features are also readily visible in the 490 - 590 nm band. Second section of cloud structures observed on 2 April 1999, showing signs of dissipation. Oval formation in the Oxus, Oxia Portus, Chryse, Sinus Meridiani area seems to have dissipated somewhat, and has shifted southward very slightly as a whole. See composite, and 400 - 590 nm enhanced image. Limb haze on southern and western limbs of the planet appears to have retreated slightly, and become more concentrated. Haze in the area of Nix Olympica seems to be much better defined than in 2 April 1999 image, though seeing is comparable. Bright red areas in Tempe and Arcadia areas (latitude 44°, longitude 82°, and latitude 41°, longitude 103°) appear to have diffused since 2 April 1999 observation, despite similar data processing techniques. Though still present, these two red markings have gone from being well defined dashes in the 2 April 1999 image, to being less intense, broader rectangles in this 3 April 1999 image. I suspect these markings to be caused by dust storms.

1999-04-03 MLS Image of Mars Mark Schmidt, Racine, Wisconsin; 88.02861° W 44.72889° N; E-mail: rasastro@wi.net
ST-5C CCD camera; 14-in (36cm) f/10 Schmidt-Cassegrain, Projection.

 Ls: 118.8°; De: 15.4°; Diameter: 14.2”
07:05 U.T.;  CM: 68.76°;  Integration time: 0.7s @ f/31.
07:31 U.T.;  CM: 75.09°;  Integration time: 1.6s @ f/44.
07:39 U.T.;  CM: 77.04°;  Integration time: 2.4s @ f/44.

Filters: 23A + IR Rejection Filter - Murnaghan Instruments Filter

Seeing: Poor - #3-1/2 - #4; Transparency: 1 mag.
Processing: CCDSoft-Image Processing Software; Skypro-Image Processing Software
Notes: Very hazy with low ground fog.

1999-04-03 BCC Image of Mars Stefan Buda & Bratislav Curcic, Melbourne, Australia (5km from the city centre).
Homemade CB211 clone CCD with a mechanical shutter; 10-in. (25.4 cm) f/16 Dall-Kirkham (homemade) + 3X Barlow (effective f/50). No filters.

Seeing conditions were rather bad (5 on a 1-10 scale); transparency: good, limiting magnitude about 4.5.

These images cover the area of Ascraeus Lacus and Nix Olympica that seem to have much less coverage than the 'interesting' side of Mars. Clouds are quite conspicious on both images, as are surface markings.


4

1999-04-04 A_T Image of Mars Tomio Akutsu, Japan; E-mail: is6t-akt@asahi-net.or.jp

32cm F/6.5 Reflector Telers2 KAF0400E CCD

Integration times:
N: 0.15s
R + IR block filter: 0.5s
G + IR block filter: 1.5s
B + IR block filter: 10s
IR: 1.0s
Tri-color is composite of images 3-6 (R, G, & B)

Seeing: 6-7/10 Transparency: 3/5 (cloudy sky)


5

1999-04-05 T_P Image of Mars Tim Parker, Los Angeles, California
Starlight Xpress HX516, binned 2x2; 8" (20 cm) f/6 Springfield Newtonian; Eyepiece projection

1999-04-05 DMM Image of Mars David M. Moore, Pheonix, Arizona;
E-mail: davidpaulamoore@email.msn.com


6

1999-04-06 N_F Image of Mars Nelson Falsarella, Sao Jose do Rio Preto, SP, BRAZIL; E-mail: nfalsarella@riopreto.com.br
International Mars Patrol, Rede de Astronomia Observacional, REA-Brazil
AVA ASTROVID 400 CCD Videocamera; 8-in (20cm) f/6.5 Newtonian, Eyepiece Projection with a MEADE Series 3000 Plossl 5mm.

1999-04-06 MLS Image of Mars Mark Schmidt, Racine, Wisconsin; 88.02861° W 44.72889° N; E-mail: rasastro@wi.net
ST-5C CCD camera; 14-in (36cm) f/10 Schmidt-Cassegrain, Projection.

 Ls: 120.7°; De: 15.8°; Diameter: 14.7”
04:57 U.T.;  CM: 2.07°;  Integration time: 0.09s @ f/31.
Filters: 23A + IR Rejection Filter - Murnaghan Instruments Filter

Seeing: #3-1/2; Transparency: 3.5 mag.
Processing: CCDSoft-Image Processing Software; Skypro-Image Processing Software
Notes: Consistently poor seeing for several weeks...getting frustrated!!

1999-04-06 DCP Image of Mars Donald C. Parker, Coral Gables, Florida
Lynxx PC camera 16-in (41cm) f/6 Newtonian, Eyepiece Projection @ f/47.8

Integration Times:
   Blue (BG12 + IR Rejection)   8.25s
   Green (VG9 + IR Rejection)    3.63s
   Red (RG610 + IR Rejection)   0.41s
Images flat and dark corrected.
Seeing excellent (8-10). Transparency 4.5-5.0m. ENE wind 0-7 knots, increasing. No dew.
Delicate clouds over S. Cydonia, Eden, across Achillis Pons, and in S. Chryse. Weak evening limb cloud; brilliant orning limb cloud and haze. Moderate violet clearing -- also noted visually with Wratten-47 filter. Hydrae S. prominent - Hydaspes hinted on some images. Possible NPC outlier (Ierne) west of the cap.

1999-04-06 RWW Drawing of Mars Richard W. Wilhelm, Manorville, New York.
4.5" (11.4 cm) F/8 Newtonian.

Seeing: 7, transparency: 5.
Erythraeum and Acidalia prominent. Southern part of Erythraeum distinctly darker. Nilokeras seen as "detached" from Acidalia. NPC small but brilliant. Extensive haze on both leading and following limbs. Additional brightness (dotted outline) observed over Tharsis and Eden region north of Sinus Meridani - all seen in both red and blue light. Haze noted over Noachis/Argyre region.

1999-04-06 M_DiS Image of MarsMaurizio Di Sciullo, Coconut Creek, Florida; E-mail: NimbusSky@worldnet.att.net
Starlight Xpress HX-516 CCD camera; 10" (25 cm) Excelsior Optics E-258 f/8 Newtonian, Eyepiece Projection @ f/48

Integration Times:
   400 - 510 nm:   0.20s
   490 - 590 nm:   0.15s
   610 - 720 nm:   0.22s
All images acquired with 700 - 1200+ nm block filter inline with eyepiece projection unit, True Technologies Dichroic Filters + IR block
No dark frame, flat fielding or bias correction applied. Camera operated in "Binned" (low-res) mode. All images are single frames, no co-addition or averaging performed, except for composite color image.

Seeing: Mediocre; 5/10. Wind; S-SW variable, 0-3 knots, extreme humidity (> 98%).
Startlingly bright haze over morning limb, easily visible at low powers ( < 200x ). This area has been reasonably active over the past 96 hours, but readings by this observer show a 4.5 dB increase in intensity in the 400 - 510 nm band over the morning limb. Further, cloud cover extends into Sinai Planum, to the southern limit of Valles Marineris. Punctuating the haze are Ascraeus Mons, and Alba Patera, which is clearly visible as the oval clearing in the morning limb haze at roughly +40° latitude. Observations in same band also indicate presence of isolated haze over southern Xanthe Terra adjacent to Margaritifer Sinus, and spot clouds over Arabia, just north of Terra Meridiani. Argyre is clearly visible in the 400 - 510 nm band, the 490 - 590 band, and in the composite as a small, white oval at the extreme southern edge of the planetary disc. Observations were cut short by degrading seeing, and copious amounts of condensation collecting on equipment....


7

No images.


8

1999-04-08 M_DiS Image of MarsMaurizio Di Sciullo, Coconut Creek, Florida; E-mail: NimbusSky@worldnet.att.net
Starlight Xpress HX-516 CCD camera; 10" (25 cm) Excelsior Optics E-258 f/8 Newtonian, Eyepiece Projection @ f/48

Integration Times:
   400 - 510 nm:   0.17s
   490 - 590 nm:   0.13s
   610 - 720 nm:   0.18s
All images acquired with 700 - 1200+ nm block filter inline with eyepiece projection unit, True Technologies Dichroic Filters + IR block
No dark frame, flat fielding or bias correction applied. Camera operated in "Binned" (low-res) mode. All images are single frames, no co-addition or averaging performed, except for composite color image.

Seeing: Poor: 3-4/10. Wind: Calm. Fast seeing wrought havoc on imaging attempts; 466 frames acquired, 5 of marginal value, 461 useless....
Unusually bright morning haze over Tharsis persisting. Weak equatorial cloud bands (ECB) observable in 400 - 510 nm band, and to some degree also in 490-590 band. Pronounced, isolated cloud structure over Aeria. Poor seeing conditions dramatically reduced resolution of fine details, to practically un-detectable limits.

1999-04-08 AJC Image of Mars António Cidadão, Oeiras, Portugal
ST-5C camera 10-in (25cm) f/10 Schmidt-Cassegrain


9

1999-04-09 N_F Image of Mars Nelson Falsarella, Sao Jose do Rio Preto, SP, BRAZIL; E-mail: nfalsarella@riopreto.com.br
International Mars Patrol, Rede de Astronomia Observacional, REA-Brazil
AVA ASTROVID 400 CCD Videocamera; 8-in (20cm) f/6.5 Newtonian, Eyepiece Projection with a MEADE Series 3000 Plossl 5mm.

1999-04-09 AJC Image of Mars António Cidadão, Oeiras, Portugal
ST-5C camera 10-in (25cm) f/10 Schmidt-Cassegrain

1999-04-09 RWW Drawing of Mars Richard W. Wilhelm, Manorville, New York.
4.5" (11.4 cm) F/8 Newtonian.

Seeing: 7-8, transparency: 4.
All albedo features prominent and easily seen, even in blue light (W80A). Bright evening cloud over Arabia. Extensive morning limb haze, accompanied by a brilliant cloud over Chryse. Haze on southern limb visible in green light (W58) - South Polar Hood? NPC small but bright. Unfortunately, the relatively good seeing was short-lived - turbulence moved in while I was reviewing the planet for additional detail.

1999-04-09 DF Image of MarsDenis Fell, New Sweden, Alberta, Canada (113.16°W, 52.55°N), email:dfell@telusplanet.net
Astrovid 1000 CCD camera, 8-in (20cm) f/10 SCT, Negative projection f/20, #W21 orange filter. Processed with Snappy and Micrografx Photomagic.

06:00 to 06:40 UT, CM: 3514° to 90°.
07:50 UT, CM: 68°. (right)
Seeing Antoniadi III, Martian diameter 15.00", De: 16.47, Phase .989

Darkest features Mare Acidalium, Meridianii Sinus and Aurorae Sinus. Bright areas noticed over Chryse and Argyre South is up.

1999-04-09 A_T Image of Mars Tomio Akutsu, Japan; E-mail: is6t-akt@asahi-net.or.jp

32cm F/6.5 Reflector Telers2 KAF0400E CCD
Images are all composite (3-6) and un-sharp mask processing.

1999-04-09 BCC Image of Mars Stefan Buda & Bratislav Curcic, Melbourne, Australia (5km from the city centre).
Homemade CB211 clone CCD with a mechanical shutter; 10-in. (25.4 cm) f/16 Dall-Kirkham (homemade) + 3X Barlow (effective f/50). No filters.

Seeing conditions were good (7.5/10); transparency: poor, limiting magnitude 3.5

These images cover the area of Ascraeus Lacus and Nix Olympica that seem to have much less coverage than the 'interesting' side of Mars. Clouds are quite conspicious on both images, as are surface markings.


10

1999-04-10 N_F Image of Mars Nelson Falsarella, Sao Jose do Rio Preto, SP, BRAZIL; E-mail: nfalsarella@riopreto.com.br
International Mars Patrol, Rede de Astronomia Observacional, REA-Brazil
AVA ASTROVID 400 CCD Videocamera; 8-in (20cm) f/6.5 Newtonian, Eyepiece Projection with a MEADE Series 3000 Plossl 5mm.

1999-04-10 AJC Image of Mars António Cidadão, Oeiras, Portugal
ST-5C camera 10-in (25cm) f/10 Schmidt-Cassegrain

Bright cloud over Hellas; hints of ECB but with evident limb brightning; not very conspicuous Syrtis blue cloud; some evening clouds over Aethiopis; non-homogrneous hue on Utopia.

1999-04-10 T_P Image of Mars Tim Parker, Los Angeles, California
Starlight Xpress HX516, binned 2x2; 8" (20 cm) f/6 Springfield Newtonian; Eyepiece projection

1999-04-10 DMM Image of Mars David M. Moore, Pheonix, Arizona;
E-mail: davidpaulamoore@email.msn.com

1999-04-10 MF Drawing of Mars Mario Frassati, Crescentino (VC), Italy
8-in (20 cm) f/10 Schmidt-Cassegrain, 250x, Filter: W8.

22:40 UT, CM: 235°.
Martian diameter 16.2", Phase 0.99 Seeing: 2-3



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This page is maintained by David Knighton for the International MarsWatch. The 1998-1999 MarsWatch site it hosted by the Astronomical League as a service to the astronomical community. Comments, corrections, and suggestions can be addressed to webmaster@astroleague.org. This page last updated October 7, 1999.