Daily Archives: July 6, 2014

The Sun Online and solar activity. July 6, 2014

There are currently 11 sunspot groups visible on the solar surface. NOAA 2108 and 2109 are the most prominent regions. NOAA 2108 increased its sunspot area and developed a weak delta in its trailing main spot. NOAA 2109 also developed a weak delta, located in the eastern portion of the main (leading) spot. Only three C-class flares were reported. The strongest, a C4.0 peaking on 6 July at 00:25UT, had its source in NOAA 2109, whereas NOAA 2108 produced a C3.5 flare peaking at 07:00UT.
C-class flares are expected, with a chance on an M-class flare from NOAA 2108 and 2109. Solar wind speed declined from 290 to 250 km/s until 09:30UT, when a sudden increase back to 290 km/s was observed. Bz varied the entire period between -6 and +4 nT. Geomagnetic conditions were quiet and are expected to remain so as Earth is crossing different sectors of the heliospheric current sheet.

Equipment: Coronado 90 +  Imaging Source DMK  + LX75
Processing: Photoshop, Avistack 300 frames
Date: 07/06/14
Time UT: 16:00
Exposure 1/500 sec.

Observatory Sponli


Manhattanhenge: A New York City Sunset 

Image Credit & Copyright: Neil deGrasse Tyson (AMNH)

 This coming Saturday, if it is clear, well placed New Yorkers can go outside at sunset and watch their city act like a modern version of Stonehenge. Manhattan’s streets will flood dramatically with sunlight just as the Sun sets precisely at each street’s western end. Usually, the tall buildings that line the gridded streets of New York City’s tallest borough will hide the setting Sun. This effect makes Manhattan a type of modernStonehenge, although only aligned to about 30 degrees east of north. Were Manhattan’s road grid perfectly aligned to east and west, today’s effect would occur on the Vernal and Autumnal Equinox, March 21 and September 21, the only two days that the Sun rises and sets due east and west. Pictured above in this horizontally stretched image, the Sun sets down 34th Street as viewed from Park Avenue. If Saturday’s sunset is hidden by clouds do not despair — the same thing happens twice each year: in late May and mid July. On none of these occasions, however, should you ever look directly at the Sun.

APOD NASA 06-Jul-14

Lagoon Nebula

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The Lagoon Nebula (catalogued as Messier 8 or M8, and as NGC 6523) is a giant interstellar cloud in the constellation Sagittarius. It is classified as an emission nebula and as a H II region.

The Lagoon Nebula was discovered by Giovanni Hodierna before 1654 and is one of only two star-forming nebulae faintly visible to the naked eye from mid-northern latitudes. Seen with binoculars, it appears as a distinct oval cloudlike patch with a definite core. A fragile star cluster appears superimposed on it.

Imaging telescopes or lenses: Konus Super 120/1000
Imaging cameras: Praktica MTL-5
Mounts: Konus EQ3.2
Guiding telescopes or lenses: Konus Vista 80/400
Software: Corel Paint Shop Pro x2, aurigaimaging Registar 1.0
Dates: July 31, 2008
Locations: Albaneta – Pollino
Frames: 6×1200″
Integration: 2.0 hours

Author: Giuseppe Donatiello
AstroPhotography of the day by SPONLI 06 July 2014