Hi all, Yesterday evening I imaged a pass of North Korea's new satellite Kwangmyŏngsŏng-4 (KMS-4). The sky was very clear. I also imaged a pass of the UNHA-3 upper stage that launched it. The rocket stage is nicely flashing (see also several of Leo's recent posts) with a regular periodicity. From 3 images obtained between 19:28:32 and 19:28:44 UT (28 Feb 2016) I obtained a curve with slightly asymetric specular peaks that is best fitted by a composite of two sinusoids: a main period of 2.39 seconds, and a second lesser period of 1.195 seconds. See curve here: http://sattrackcam.blogspot.nl/2016/02/imaging-north-koreas-new-kwangmyongsong.html On that same URL also images of the UNHA-3 and of KMS-4. KMS-4 (2016-009A) is faint and I therefore used the 2.8/180mm Zeiss Sonnar lens on my EOS 60D. That means a small field of view, and hence a short arc. KMS-4 was captured in two images of 2 seconds each, over a total arc of ~6 seconds. I could not see a brightness variation over that period, so either it is stable, or if it is tumbling at all it must be a very slow tumble. Captured a number of other objects as well. Astrometry later. - Marco ----- Dr Marco Langbroek - SatTrackCam Leiden, the Netherlands. e-mail: sattrackcam_at_langbroek.org Cospar 4353 (Leiden): 52.15412 N, 4.49081 E (WGS84), +0 m ASL Cospar 4355 (Cronesteyn): 52.13878 N, 4.49937 E (WGS84), -2 m ASL Station (b)log: http://sattrackcam.blogspot.com Twitter: _at_Marco_Langbroek ----- _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-lReceived on Mon Feb 29 2016 - 05:53:39 UTC
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