Subject: Resurs 1-3 Solar transit > This object may have been observed this evening , slightly north of the > track predicted by CalSky.com > > It passed across the lower half of the Sun's disk at 18:30:26 gmt appearing > in one frame of AVI (1/2500th sec 15fps ) as a small blur traversing north > of the main sunspot cluster , presently visible. > > I was using a webcam / 200 mm zoom lens combination fitted with Baader solar > foil and a glass Skylight filter .Whilst this arrangement causes some > shadowing of moving objects on the individual frames , it certainly seems to > be effective. > This is the second solar transit in a week that I have observed in this way. > > I am however uncomfortable with the size of the target. > Last week I imaged a solar transit by a Cosmos rocket booster using the same > set-up.Again , the object seemed to be too large....so I have a couple of > questions. > > Is anyone else using CalSky to try and video solar transits.....if so I > would be interested to see the results. > Also , Wednesdays transit by Mercury was for the most part clouded out here > , but those frames I did manage to grab , using the same equipment , > produced good images of the planet which was about twice the predicted size > of Resurs http://www.satcom.freeserve.co.uk/solar.htm > .....so it is certainly feasible that tonights capture is correct , but , > what causes this apparent magnification.....the booster is after all only > 10.4 metres in length and has a range of nearly 2000 km. > > Details from CalSky.com are as follows. > > > 19h30m29.4s Resurs 1-3 Rocket > (23343 1994-74-B) Crosses the disk of Sun. Separation:0.25d > Angular Velocity:12.9'/s. Transit duration: 0.86s > Angular diameter: 1.1" cylindrical, 10.4m x 3.9m > Direction towards center line: az:284.4d WNW > az: 285.0d WNW h: 10.7 dist: 1999.5km mag=19.2m > > Thanks , > > John. > > http://www.satcom.freeserve.co.uk ----------------------------------------------------------------- To unsubscribe from SeeSat-L, send a message with 'unsubscribe' in the SUBJECT to SeeSat-L-request@satobs.org List archived at http://www.satobs.org/seesat/seesatindex.html
This archive was generated by hypermail 2b29 : Sat May 10 2003 - 18:00:17 EDT