Forum Replies Created
-
AuthorPosts
-
Dr Paul Leyland
ParticipantCould you post a brief report on how this proposal was received please?
Dr Paul Leyland
Participant“Next thing is to determine the rpm and chop rate….”
If you have access to a sillyscope it is very easy to determine chop rate to an accuracy of a few percent. Shine a laser pointer through the chopper at a photodiode and measure the voltage across the latter.
Dr Paul Leyland
ParticipantAndy, arcsecs are indeed a useful size for some objects but so are degrees. For some objects, the milliarcsec and microarcsec are the appropriate measures, especially in astrometry and VLBI radio.
This leads me to the proposal that degrees, millidegrees, microdegrees, nanodegrees, … would be the appropriate way of proceeding. Alternatively, and this I find rather more attractive myself, radians and their SI sub-divisions must be the natural units. You may claim that a radian is a rather large angle but the size of the farad has never seriously worried the electronics engineers who are quite happy working with pF capacitors.
Dr Paul Leyland
ParticipantPerhaps. IMAO you should check my assessment. I could well be wrong and have been many times in the past.
Dr Paul Leyland
ParticipantThat one looks like 2MASS 11112757+554027 with J=14.822
Dr Paul Leyland
ParticipantIt is very likely 2MASS 11112688+5540232 which is indeed quite red. V=12.538, J=11.272 according to Vizier.
Dr Paul Leyland
ParticipantAn excellent idea in my opinion.
A decent number of exoplanet transits are in range of amateur equipment, as indicated by the continuing acknowledgements by Tabby Boyajian et al. to AAVSO observers. Another example is
which can be found at http://www.tacandeobservatory.com/p/act.html
As noted, it is surely possible for amateurs to discover new exoplanets by the transit method. All you need is dedication, good fortune and to be able to perform photometry to an accuracy of 0.003 magnitudes or better. Despite the attention of the professionals, Kepler has only examined a small fraction of the sky and GAIA makes only a few dozen observations (at best) of any given star.
Disclaimer: I’ve a vested interest in the link given above because there’s a fair chance I’ll be purchasing the Tacande Observatory.
-
AuthorPosts