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DaveHer

DaveHer

Lives in Australia Murrumbateman, Australia
Joined on Jan 16, 2012
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DaveHer's recent activity

  • Added 1 photo to their gallery
    C/2012 F6 on 2013 Feb 05: Two images taken 80 mins apart. Each is a stack of 20 x 30 sec exposures. The tail is much stronger than previously. The fork in the tail moves away from the nucleus by about 2 arc mins between the exposures - indicative of a velocity of over 60,000 km/hr
    3 months ago
  • Added 1 photo to their gallery
    C/2012 F6 on 2013 Feb03 @14hrs: A stack of 30 x 20-sec images. The tail continues to evolve, and now has a strong central streamer which has significant internal structure. Field is 24 x 16 arc mins, north to the top. Declination is -85d 24'
    3 months ago
  • Added 1 photo to their gallery
    C/2012 F6 Lemmon 2013 Feb 02: A stack of 40 x 20-sec images, taken on 2013 Feb 2.6. The tail is exhibiting stronger detail. Image size is 16 x 24 arc mins
    3 months ago
  • Added 1 photo to their gallery
    Comet Lemmon C/2012 F6 - 2013 Jan 30 & 31: This montage is of images separated by about 24 hrs. Jan 30- image is at the top. Each image is a stack of 40 x 30sec exposures. Comparison shows significant differences in the streamer structure.
    4 months ago
  • Added 1 photo to their gallery
    C2012 F6 Lemmon on 2013 Jan30, 6 images: This montage has 6 images of Comet Lemmon over a 2-hour period. All images are a stack of 20x30-sec exposures. Image brightness has been stretched the same in all 6 images. Close inspoection of the images shows changes in the structure of the tail at intervals between 20 mins and 1 hour.
    4 months ago
  • Added 1 photo to their gallery
    C/2012 S1 on 2013 Jan09 at 14hrs UT
    4 months ago
  • Added 1 photo to their gallery
    C/2009 F4 on 2013 Jan 03: These two images are from the same exposure, but with different brightness settings on the display. The image on the left shows the nucleus and coma, while the image on the right shows the tail. The image size is 4.5 x 1.5 arc mins, with north to the top.
    4 months ago
  • Added 1 photo to their gallery
    C/2009 F4 McNaught on 2012 Dec 05: A 15' x 15' image of C/2009 F4, at declination -54.8 deg. Taken with 40cm scope, stack of 8 x 2min exposures. Comet shows a tail of 7 arc min in PA177.
    5 months ago
  • Added 1 photo to their gallery
    Comet C/2012_V4: Image taken on 2012 Dec 3.45 at an altitude of about 14 deg - with the seeing being somewhat poor. Image is a stack of 5 x 30sec exposures. Image size is 24' x 16' (north to top). Image appears to show a tail of about 8' in PA 93deg.
    5 months ago
  • Added 1 photo to their gallery
    168P on 2012 Oct03: Comet 168P, showing a faint tail for about 7 arc mins in PA 170. Field size is 24' x 16'. Image was taken at relatively low altitude from my southern latitude - hence stars are somewhat bloated. Image taken with 40cm scope, stack of 8 x 2 min exposures
    7 months ago
  • Added 1 photo to their gallery
    Comet C/2011L4 PANSTARRS_2012Jul16: Image taken on 2012 Jul 16. Flied is about 10 arcmin square.
    9 months ago
  • Added 1 photo to their gallery
    Comet Hale-Bopp C/1995 O1 - 2012 Aug 07: A stack of 36 x 4-min exposures of Comet Hale-Bopp C/1995 O1, using a 40cm SCT. Comet is at about mag 21.8. Location is RA 2h 43m 50s, -86d 05' 00". Field size of image is about 4 arcmin square. Comet location indicated by the yellow lines. Last reported image of this comet was on 2010 Dec 04, with a reported mag of 23.4
    9 months ago
  • Added 1 photo to their gallery
    189P on 2012 July 06.68: A stack of 6 x 20sec images with 40cm f10 scope. Field size is about 4.5 arcmin square. The coma diamter is around 12", and the tail extends about 19" to the bottom right. The short tail is partly masked by a trailing star. The unfiltered euclear magnitude is around 15.5.
    10 months ago
  • Added 1 photo to their gallery
    Comet 189P recovery: Recovery images of comet 189P NEAT. Taken on 2012 May 27.6. Images are stacks 5 x 3min exposures, with 40cm scope. The three images show the comet's movement over half an hour. The image size is 2.7 x 3.4 arc mins. Comet mag is about 18.6.
    May 27, 2012
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