Exoplanet Transit HAT-P-5b in Lyra (13 mmag depth)

Dear friends ... and especially Mr Euronymous, Sir!

I sat down last night to pursue the 175-minute transit of the exoplanet HAT-P-5b in the constellation of Lyra. The parent star, GSC 2634:1087, is characterized with a magnitude of 11.950 (v) and, with a transit depth of 13 mmag (ie. 11.950 pre-ingress and 11.963 mid-transit), I was very apprehensive about a successful capture of the associated light curve. To make matters worse, my target was relatively low in the sky, for my pre-ingress sequence was with the parent star at 30 degrees altitude and a further five degrees higher at the onset of ingress.

For a result based on 4 hours and 40 minutes total time, I kindly direct you to www.perseus.gr/Astro-Photometry-HAT-P-5-20080528.htm ....

I have another transit involving the exoplanet WASP-3b, also in Lyra, for this Saturday with a depth of 12.9 mmag and I hope to have results immediately therafter.

I sat down last night to pursue the 175-minute transit of the exoplanet HAT-P-5b in the constellation of Lyra. The parent star, GSC 2634:1087, is characterized with a magnitude of 11.950 (v) and, with a transit depth of 13 mmag (ie. 11.950 pre-ingress and 11.963 mid-transit),

I didn't understand a word of it, Anthony, but it sounded wonderful. :lol:

Hi Paul,

I apologize for any confusion. When an exoplanet transits in front of its parent star, it (the parent star) experiences a small drop in magnitude. It is this small drop we are trying to capture when pursuing these events.

For this particular exoplanet, it leads to a drop of 13 mmag in the magnitude of the parent star. In other words, the star has a "normal" magnitude of 11.950 and which drops to 11.963 (ie. 13 mmag) when the exoplanet (HAT-P-5b) passes in front of it and thereby blocks a very small portion of the light.

Here is a more graphic example involving the Venus transit from 2004: www.perseus.gr/Astro-Planet-Ven-Tr2004.htm .

didn't understand a word of it, Anthony, but it sounded wonderful.

Anthony has recorded a planet dimming a star by 0.013 of a magnitude Paul.

Anthony, they need professional people like you on Mauna Kea.

Send your CV to "Keck Telescope."

Just having a little fun lads, I understood the word Lyra and the word star , though I do admit I didn't know what mmag meant.

congrats Anthony!