Archive
07/08/2012 – Ephemeris – How to find the Ring Nebula (M57)
Ephemeris for Monday, July 8th. Today the sun will be up for 15 hours and 22 minutes, setting at 9:28. The moon is new today, and won’t be visible. | Tomorrow the sun will rise at 6:06.
The constellation of Lyra is high in the east when it gets dark tonight. Its bright star Vega and the thin parallelogram of stars depict the harp it represents. Between the two stars at the bottom of the parallelogram opposite Vega hides a celestial wonder that can be seen in a small telescope, though the larger the telescope the better. It is the Ring Nebula, a smoke ring blown by a dying star. The telescope’s finder cannot show the ring. Center the finder between those two stars. The nebula will appear as a small dim gray spot in the telescope. Closer inspection may reveal that the center of the nebula is darker than the edges. It is about 2,300 light years away, but that’s a very approximate distance, which could be a thousand light years off.
Times are for the Traverse City/Interlochen area of Michigan. They may be different for your location.
Addendum
The constellation Lyra with the location of the Ring Nebula shown. Created using Stellarium.
A closer look at the location of the Ring Nebula. Created using Stellarium.
12/16/11 – Ephemeris – The constellation Orion rising
Friday, December 16th. The sun will rise at 8:12. It’ll be up for 8 hours and 50 minutes, setting at 5:03. The moon, 1 day before last quarter, will rise at 11:49 this evening.
At 9 p.m. the constellation of Orion the giant hunter will be rising in the east southeast, with its belt stars nearly vertically aligned. The belt stars are contained within a tilted rectangle of four bright stars that’s leaning to the left. The brightest of the top stars is Betelgeuse a bright red star. It’s a huge red giant star. Both top stars are Orion’s shoulders. The other shoulder star is Bellatrix. The bottom stars are Orion’s knees. The brightest, diagonally opposite from Betelgeuse is Rigel, a bright blue-white giant star. The other knee star is named Saiph. Orion is home to a beautiful nebula or cloud of gas, which we’ll explore later this winter, visible in binoculars it is located right and below Orion’s belt stars.
* Times, as always are for the Traverse City/Interlochen area of Michigan.
Addendum
Orion with star names
Bob Moler's Ephemeris Blog 