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Marswatch

1998-1999 Apparition

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



01

1999 Jan 1 MarsDonald 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

1999-01-02 FJM Image of MarsF. J. Melillo


03-04

No images.


05

1999 Jan 05 MarsDaniel P. Joyce, Chicago, Illinois
18" f/6 RL 272x; 1/5/99 12:10-12:20 UT
Filters: W#23A, W#80A
CM: 243°; Ls: 80°; De: 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.

1999 Jan 05 MarsDavid 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

1999 Jan 09 MarsDonald 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

1999 Jan 15 MarsDonald 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

1999 Jan 18 MarsDonald C. Parker, Coral Gables, Florida
1999 Jan 18 MarsDonald 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

1999 Jan 20 MarsDonald 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

1999 Jan 29 MarsDonald 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

1999 Jan 31 MarsDonald 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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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 4, 1999.