Marswatch 1998-1999 Apparition Linking Amateur and Professional Mars Observing Communities.

Images - 1999 January
    (All times U. T. - Images not to scale.)

01

Donald C. Parker, Coral Gables, Florida
Lynxx PC camera 16-in (41cm) F/6 Newtonian, Eyepiece Projection @ f/55.2

Integration Times:
   Blue (BG12 + IR Rejection) 20.00s
   Green (VG9 + IR Rejection)   6.50s
   Red (RG610 + IR Rejection)  0.73s
Images flat and dark corrected.
Seeing FAIR-GOOD (7). Transparency 4.5M, Variable; Wind NE 5-13 knots.
Elysium cloud on evening limb. Bright morning limb cloud. Blue Syrtis Cloud noted. In blue light hint of ECB.

02

F. J. Melillo

03-04

No images.

05

Daniel P. Joyce, Chicago, Illinois
18" f/6 RL 272x; 1/5/99 12:10-12:20 UT
Filters: W#23A, W#80A
CM: 243°; L_s: 80°; D_e: 21.2°
Seeing: 7; Transparency: 4; Blue Clearing: 1

Looked like fog at Hellas. When using the W#23A filter, only the north polar cap was conspicuous; Albedo features were very subdued, especially in low latitudes. Fog, but no limb haze was noted with the W#80A filter.

David Klassen and Bill Golisch, NASA Infrared Telescope Facility, Mauna Kea, Hawaii
3.0-meter; 13:45 UT
Click on image for additional views from this observing run.

These images were taken at the NASA IRTF using the NSFCAM. Mars was imaged through the circular variable filter (CVF) at several infrared wavelengths (wavelength in micrometers listed below each image). The observations were made at about 13:45 UT by David Klassen and Bill Golisch. The images have gone through preliminary processing but have yet to be absolutely calibrated.

06-08

No images.

09

Donald C. Parker, Coral Gables, Florida
Lynxx PC camera 16-in (41cm) f/6 Newtonian, Eyepiece Projection @ f/55.2

Integration Times:
   Blue (BG12 + IR Rejection) 17.50-20.00s
   Green (VG9 + IR Rejection)   6.00-6.50s
   Red (RG610 + IR Rejection)  0.63-0.70s
Images flat and dark corrected.
Seeing poor (4-5). Transparency 4.5-5.0m); Wind E 0-3 knots. Heavy dew.
Conspicuous morning limb hazes; Orographic clouds (Olympus) on evening limb. Trivium-Cerberus noted.

10-14

No images.

15

Donald C. Parker, Coral Gables, Florida
Lynxx PC camera 16-in (41cm) F/6 Newtonian, Eyepiece Projection @ f/55.2

Integration Times:
   Blue (BG12 + IR Rejection) 17.00s
   Green (VG9 + IR Rejection)   5.25s
   Red (RG610 + IR Rejection)  0.60s
Images flat and dark corrected.
Seeing poor (4-5). Transparency 4.5m with occasional clouds; No wind. Heavy dew.
Tharsis afternoon orographics bright. Olympus cloud near CM (Central Meridian). Outlier (Lemuria) noted west of NPC (North Polar Cap).

16-17

No Images.

18

Donald C. Parker, Coral Gables, Florida
Donald C. Parker, Coral Gables, Florida
Lynxx PC camera 16-in (41cm) F/6 Newtonian, Eyepiece Projection @ f/55.2

Integration Times:
   Blue (BG12 + IR Rejection) 16.25s
   Green (VG9 + IR Rejection)   5.00s
   Red (RG610 + IR Rejection)  0.53s
Images flat and dark corrected.
Seeing GOOD (7-8). Transparency 5.0m; SE wind 2-5 knots. Light dew.
Tharsis clouds bright, possibly forming an ECB. Possible Rima Tenuis. Brightening over Arcadia.

19

No images.

20

Donald C. Parker, Coral Gables, Florida
Lynxx PC camera 16-in (41cm) F/6 Newtonian, Eyepiece Projection @ f/55.2

Integration Times:
   Blue (BG12 + IR Rejection) 16.00s
   Green (VG9 + IR Rejection)   5.00s
   Red (RG610 + IR Rejection)  0.55s
Images flat and dark corrected.
Seeing GOOD (7-8)but worsened late. Transparency 5.0m; No wind. Heavy dew.
Tharsis clouds bright but much less conspicuous cloud activity over Chryse-Xanthe near evening limb. Solis Planitia features appear normal.

21-28

No images.

29

Donald C. Parker, Coral Gables, Florida
Lynxx PC camera 16-in (41cm) F/6 Newtonian, Eyepiece Projection @ f/55.2

Integration Times:
   Blue (BG12 + IR Rejection) 16.25s
   Green (VG9 + IR Rejection)   6.00s
   Red (RG610 + IR Rejection)  0.60s
Images flat and dark corrected.
Seeing GOOD (7-8). Transparency 4.0m; SE wind 0-13 knots, gusty. No dew.
Bright morning cloud over Chryse; cloud over Aeria, hint of ECB. Arctic hazes.

30

No images.

31

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) 14.75s
   Green (VG9 + IR Rejection)   4.75s
   Red (RG610 + IR Rejection)  0.50s
Images flat and dark corrected.
Seeing fair-good (6-7). Transparency 4.0m. occasional haze; ESE wind 0-12 knots, gusty. No dew.
Bright morning cloud over Chryse; cloud over Aeria and Syrtis Major. Note Syrtis Blue Cloud. Hint of ECB in blue light.

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