On Feb 23, 3:24 am, moro...@world.std.spaamtrap.com (Michael Moroney) wrote: > palsing <pnals...@gmail.com> writes: > >Go here... > >http://aa.usno.navy.mil/data/docs/mrst.php > > You beat me to it. I was about to post a reply about that very same site. > > >You can even set the page for January 1st and select 365 days, and get > >the rise times for the entire year, all 365 days, and see for yourself > >just how those rise times fall back each day by those same 3 minutes > >and 56 seconds each day. > > For this year, select 366 days, otherwise the readout ends on December 30. > > But the important thing is, if you select 365 days, there will be a total > of 366 Sirius-rises and 366 Sirius-sets.
The orbital (heliacal) setting and rising of Sirius is so well attested,in other words is disappears from view as our orbit puts it behind the glare of the Sun that no person calling themselves an astronomer could imagine the star in stellar circumpolar motion.
When people see Sirius move out of the glare of the Sun in August,they are watching a genuine orbital event as our planet heads in the direction of Sirius and less than 10 months later they will watch Sirius disappear once more from view as Sirius enters the glare of the Sun from the opposite side.
Any star in Ursa Major,which the ancients called the 'Imperishables',as they are always in view,pass the observer's meridian 365 times in non leap years and 366 times in a leap year so that from the arbitrary orbital point of March 1st 2008 until February 29th this week,a star that is always in view will have crossed the observer's meridian 1461 times.Perhaps people cannot count,as this is all it requires but where they are going to get 1465 rotations does not tally for observations and detracts from the great orbital spectacle where stars such as Sirius disappear behind the Sun's glare due to the orbital motion of the Earth.
Select 366 days, as you should > this year, and there are 367 rises and sets. > This works for any non-circumpolar star, of course.
Here is this wonderful spectacle that I haven't promoted often enough in order to concentrate on polar dawn/twilight and the specifics of our planet's orbital traits and you can come here and without objection state something that exists only in your imagination as 'fact'.The most basic form of astronomy are the constellation spotters,those guys who go outside and identify stars and even if anecdotal to Americans that Sirius is directly behind the glare of the Sun on July 4th,it cannot be appreciated if it is sent spinning in stellar circumpolar motion
I can live with the hostility,it is the awful silence that is difficult to accept for here ,with February 29th approaching as the 1461st rotation of the Earth covering 4 orbital circuits,there is no genuine astronomer who can accept the balance of 1461 rotations on one side and 4 orbital circuits on the other with all thrilling details of the great cycles of the Earth.