Darkness of the background sky: 4
Weather: Partly cloudy sky, calm
Objects observed: NGC 1513
During night between 11./12.8.2016, we went out with my fellow astronomy friends to have a perseid party in Leistilänjärvi, Nakkila. During the night we were able to observe several perseid meteors, and besides this, also some distant lightnings!
Besides observing perseid meteors, I also observed some variable stars and I also made one deep sky observing. The object of my choice was NGC 1513, an open cluster in Perseus, located halfway between mu and lambda Persei. Of this object I wrote following notes:
@120x: a rather small, poor cluster, the cluster is pretty well detached from it’s background, not very well concentrated. Most of the stars of the cluster appear to be in a ring-shape.
Last night heat lightnings were observed all around Southern Finland! The lightnings were caused by a thunderstorm cells that were moving northwards from the Gulf of Finland to mainland. The lightning activity was pretty intensive, and I could observe several lightnings in a minute! I didn’t hear sound of thunder ever during the night, which means that the lightnings were pretty far away!
Heat lightning means a silent lightning flash, which is observed without the sound of thunder. Heat lightnings doesn’t have anything to do with heat, and term heat lightning is used because these lightnings are often observed when surface temperatures are warm. According to Accuweather, the name of the phenomena originates from an old wive’s tale, that a hot weather can generate lightnings without a thunderstorm, but this of course, is just a myth, as Accuweather explains.
Observed phenomena: Perseid meteor shower, heat lightnings
Observing place: Turku, Finland
Observing method: Photography
Technical information about photographing equipment: Canon EOS 1100D, objectives: Canon EF-S 18-55mm IS and Samyang 8mm fish eye -lens
I was observing the perseids -meteor shower in the night between 12th and 13th of August 2013 in Uittamo district of Turku, Finland. I was observing together with Linda Laakso, and together we observed in total 43 perseid meteors! Among the ordinary meteors, I was also able to see and photograph a really stunning perseid fireball, at least of magnitude -4!
Besides the meteor shower, we were able to observe some distant heat lightnings in the southern horizon. The lightning storm cell that caused the heat lightnings was somewhere over the Baltic sea in the south. The lightnings of this thunderstorm were flashing quite frequently, I was able to see lightning flashes in every one or two minutes!