Petri Kehusmaa Astroblog » Lightcurves

EX Dra

Petri Kehusmaa — Wed, 29 Apr 2009 07:11:28 +0000

This might be my last observation for this spring. I decided to pick up this interesting variable with very deep eclipse. Light curve with 70 data points (with 30 seconds exposure).

UX UMa Eclipse

Petri Kehusmaa — Sun, 26 Apr 2009 12:39:49 +0000

While the night sky is too pale for color imaging, it’s still possible to image variable stars. I decided to capture nova-like CV UX UMa and it’s eclipse. Here is the result made with MaximDL. Imaging scope was Deep Sky Instruments RC10C and camera was SBIG STL-11000.

Minor Planet – 133 Cyrene

Petri Kehusmaa — Fri, 07 Nov 2008 08:49:18 +0000

Last night I continued testing automated session with CCDAutopilot. Target was asteroid 133 Cyrene. This is data for more than 4 hours. Individual exposure 2 minutes and 103 data points.

Minor Planet – 376 Geometria

Petri Kehusmaa — Thu, 06 Nov 2008 10:00:54 +0000

I decided to have this asteroid for my target when testing CCDAutopilot. This session was fully automated for almost 4 hours (I was a sleep when session ended). Everything went well and here is the result. There is a sum image where asteroid movement is visible and lightcurve to see variations of reflected sunlight from asteroid’s surface.

V466 AND Faded Away

Petri Kehusmaa — Tue, 30 Sep 2008 14:00:33 +0000

With only six days in between observations, this dwarf nova faded away for my equipment. On 22nd of September I was able to catch it with my 8″ SCT but six days later it was gone. Light curve below.

HS 2331+3905 kääpiönova / white dwarf on it’s superoutburst

Petri Kehusmaa — Sun, 09 Sep 2007 08:09:56 +0000

Havaintokausi on sitten vihdoinkin lähtenyt oikein kunnolla käyntiin pienten takaiskujen jälkeen (laitteet sateessa yli 3 tuntia!)

Ja mikäpä olisi parempi aloitus, kun tämän harvinaisen kääpiönovan ensimmäisen superpurkauksen havainnointi (AAVSO Alert Notice 357). Ensimmäinen käyrä on 06.-07.09.2007 yöltä ja jälkimmäinen 07.-08.09.2007. Jälkimmäisessä on 208 datapistettä ja se on otettu reilun 6 tunnin ajalta.

54 Alexandran valokäyrä / Light curve of 54 Alexandra

Petri Kehusmaa — Mon, 28 May 2007 18:15:58 +0000

Lisäsin galleriaan vanhalta sivustolta 54 Alexandran valokäyrän.

I added the light curve of 54 Alexandra to my Astro-gallery from old site.