Monthly Archives: April 2014

The Sun Online and solar activity. April 30, 2014

Flaring activity increased slightly during the past 24 hours, with two C-class flares. A C1.1 flare erupted from Catania sunspot group 35 (NOAA AR 2050) and peaked at 1:26 UT on 30 April. Also a C1.5 flare was detected (peak at 6:20 UT on 30 April), and SDO imagery indicates Catania sunspot group 33 (NOAA AR 2047) as source. Catania sunspot group 33 produced a B9 flare peaking at 22:54 UT on 29 April. The B9 flare was accompanied by a coronal dimming, which indicates the occurrence of CME.  A CME was observed in LASCO/C2 with first measurement at 00:24 UT on 30 April.  Further analysis of this CME will be carried out, once more data are available. A filament eruption (centered at around E20N25) was visible in PROBA2/SWAP and SDO imagery, starting at 8:27 UT on 30 April. More C-class flares are possible during the next 48 hours. Solar wind observations of ACE indicated the arrival of a transient near 19:30 UT on 29 April. There is no clear signature of the arrival of the expected coronal hole high-speed stream.
Solar wind speed (near 300 km/s) is still low. The magnitude of the interplanetary magnetic field currently is around 10 nT, with a south-directed vertical component. This lead to a few time slots with unsettled geomagnetic conditions, which is expected to continue for the next few hours. Quiet geomagnetic conditions are expected from 1 May on.
SIDC

Equipment: Coronado 90 +  Imaging Source DMK  + LX75
Processing: Photoshop, Avistack 300 frames
Date: 04/30/14
Time UT: 15:00
Exposure 1/500 sec.

With SPONLI Space is getting closer

  

A Partially Eclipsed Setting Sun 

eclipsedsunbirds_wall_2500
Image Credit & Copyright: Andrew Wall

If you look closely, you will see something quite unusual about this setting Sun. There are birds flying to the Sun’s left, but that’s not so unusual. A dark sea covers the Sun’s bottom, and dark clouds cover parts of the middle, but they are also not very unusual. More unusual is the occulted piece at the top right. And that’s no occulting cloud — that’s the Moon. Yesterday the Moon moved in front of part of the Sun as visible from Australia, and although many locations reported annoying clouds, a partially eclipsed Sun would occasionally peak through as it set. The above image was captured yesterday on the western horizon of Adelaide, South Australia. The maximum eclipse was visible only from a small part of Antarctica where the entire Moon could be seen covering the entire center of the Sun in what is known as an annular eclipse, leaving only a ring of firefrom the Sun peaking out around the edges. The next solar eclipse will be another partial eclipse, will occur on 2014 October 23, and will be visible from most of North America near sunset.

NASA APOD 30-Apr-14

NGC 2174 in Orion

94910f61e9d10fb86eb6d93dacd9ca9e.1824x0_q100_watermarkNGC 2174 (also known as Monkey Head Nebula) is an H II emission nebula located in the constellation Orion and is associated with the open star cluster NGC 2175. It is thought to be located about 6,400 light-years away from Earth. The nebula may have formed through hierarchical collapse.
There is some equivocation in the use of the identifiers NGC 2174 and NGC 2175. These may apply to the entire nebula, to its brightest knot, or to the star cluster it includes. Burnham’s Celestial Handbook lists the entire nebula as 2174/2175 and does not mention the star cluster. The NGC Project (working from the original descriptive notes) assigns NGC 2174 to the prominent knot at J2000 06h 09m 23.7s, +20° 39′ 34″ and NGC 2175 to the entire nebula, and by extension to the star cluster. Simbad uses NGC 2174 for the nebula and NGC 2175 for the star cluster.

Imaging telescopes or lenses: Williams Optics Megrez 72
Imaging cameras: Starlight Xpress SXVR-H9
Mounts: Sky-Watcher HEQ5 PRO
Guiding telescopes or lenses: Williams Optics Megrez 72
Guiding cameras: Starlight Xpress CoStar
Focal reducers: William Optics FF/FR VI
Software: PixInsight 1.8, PHD guiding, Nebulosity 3, EQMac
Filters: Astrodon 3nm OIII, Astrodon Ha 5nm
Accessories: Starlight Xpress Mini Filter wheel
Dates: Jan. 25, 2014, Jan. 26, 2014
Frames:
Astrodon 3nm OIII: 10×1800″ -20C
Astrodon Ha 5nm: 10×1800″ -20C
Integration: 10.0 hours

Author: Epicycle

AstroPhotography of the day by SPONLI
30 April 2014

Солнце онлайн и солнечная активность. 29 апреля 2014

Пять групп солнечных пятен зарегистрированы на видимой стороне солнечного диска. Группа солнечных пятен 2049 показала некоторый рост. Остальные группы были стабильными. Одна вспышка  C3.4 вспышка  с пиком в 15:26 UT 28 апреля произошла в регионе 2048.
Возможно образование новых вспышек С-класса в течение следующих 48 часов. Не обнаружены направленные на землю выбросы корональной массы. Скорость солнечного ветра снизилась до только 280 км/с. Величина межпланетного магнитного поля в настоящее время ниже 5 нТл. Геомагнитные условия были тихими и, как ожидается, останутся таковыми. Все еще возможны интервальные возмущения магнитосферы, в связи с вероятным прибытием высокоскоростного потока от корональной дыры, которые пересекла центральный меридиан утром 24 апреля.

Оборудование: Coronado 90 + LX75 + Imaging Source DMK
Обработка: PS, Avistack 300
Дата: 29.04.14
Время по МСК: 20:00
Выдержка 1/150 сек.

Обсерватория SPONLI

  

Aurora Dog over Alaska 

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Image Credit & Copyright: John Chumack

Sometimes it is hard to believe what you see in the sky. While leading his annual aurora tour last month near Fairbanks in central Alaska, astrophotographer John Chumack and his company saw a most unusual aurora. This bright aurora appeared to change into the shape of a jumping dog, complete with a curly tail. He was able to capture the fleeting natural apparition in the above image with a 15-second exposure through a wide-angle lens. By coincidence, he also captured a background sky filled with familiar highlights. Planets visible include bright Jupiter through the dog’s front legs and reddish Mars below the dog’s hind legs. Stars visible include the Big Dipper stars above the dog’s midsection and reddish Betelgeuse shining on the far right. This dog would not be following him home, however, and within a few minutes morphed into other shapes before thegeomagnetic storm particles that created it shifted to strike the Earth elsewhere.

NASA APOD 29-Apr-14

NGC 7822 in Cepheus

8d0e1afbaa86ffb1fa7fd6c20c0bf8e2.1824x0_q100_watermarkNGC 7822 is a young star forming complex in the constellation of Cepheus. The complex encompasses the emission region designated Sharpless 171, and the young cluster of stars named Berkeley 59. The complex is believed to be some 800-1000 pc distant, with the younger components aged no more than a few million years. The complex also includes one of the hottest stars discovered within 1 kpc of the Sun, namely BD+66 1673, which is an eclipsing binary system consisting of an O5V that exhibits a surface temperature of nearly 45000 K and a luminosity ~100000 times that of the Sun. The star is one of the primary sources illuminating the nebula and shaping the complex’s famed pillars of creation-type formations, the elephant trunks.

Imaging telescopes or lenses: Williams Optics Megrez 72
Imaging cameras: Starlight Xpress SXVR-H9
Mounts: Sky-Watcher HEQ5 PRO
Guiding cameras: Starlight Xpress CoStar
Focal reducers: William Optics FF/FR VI
Software: PixInsight 1.8, StarTools, PHD guiding, Nebulosity 3, EQMac
Filters: Baader OIII 8.5nm 2″, Baader Ha 7nm 2″
Frames:
Baader Ha 7nm 2″: 19×1200″ -15C
Baader OIII 8.5nm 2″: 37×1200″ -15C
Integration: 18.7 hours

Author: Epicycle

AstroPhotography of the day by SPONLI
29 April 2014

The Sun Online and solar activity. April 28, 2014

Six sunspot regions are visible at the front side of the solar disk.  All have a simple alpha or beta magnetic configuration. The background of the GOES Xray flux is at B-class level and no noteworthy flares were measured. A weak CME erupted towards the north, first visible in LASCO/C2 at 5:36 UT on 28 April. It can hardly be called a partial halo CME and does not seem to be Earth directed. C-class flaring activity can be expected for the next 48 hours. Solar wind speed is relatively stable with values between 300 to 350km/s. The magnitude of the interplanetary magnetic field was maximally 5 nT with a mainly negative Bz. Geomagnetic conditions were unsettled and are expected to remain as such. An isolated time slot of active
conditions is possible at arrival of a high speed stream related to the coronal hole that passed the central meridian early on 24 April.  
SIDC

Equipment: Coronado 90 +  Imaging Source DMK  + LX75
Processing: Photoshop, Avistack 300 frames
Date: 04/28/14
Time UT: 14:00
Exposure 1/500 sec.

With SPONLI Space is getting closer

  

Time Lapse of a Total Lunar Eclipse 

Video Credit: Adam Block, Mt. Lemmon SkyCenter, U. Arizona

Why would a bright full Moon suddenly become dark? Because it entered the shadow of the Earth. Almost two weeks ago this exact event happened as the Moon underwent a total lunar eclipse. That eclipse, visible from the half of the Earth then facing the Moon, was captured in numerous spectacular photographs and is depicted in the above time lapse video covering about an hour. The above video, recorded from Mt. Lemmon Sky Center in Arizona, USA, keeps the Earth shadow centered and shows the Moon moving through it from west to east. The temporarily good alignment between Earth, Moon, and Sun will show itself againtomorrow – precisely half a moon-th (month) later – when part of the Earth will pass through part of the new Moon’s shadow.

NASA APOD 28-Apr-2014

The Spider and the Fly in Auriga

b09548a3d10dc8e5a1adae068ff0b81b.1824x0_q100_watermarkBright clusters and nebulae abound in the ancient northern constellation of Auriga.
An imaginative eye toward the expansive IC 417 and diminutive NGC 1931 suggests a cosmic spider and fly. About 10,000 light-years distant, both represent young, open star clusters formed in interstellar clouds and still embedded in glowing hydrogen gas. For scale, the more compact NGC 1931 is about 10 light-years across.

Imaging telescopes or lenses: Williams Optics Megrez 72
Imaging cameras: Starlight Xpress SXVR-H9
Mounts: Sky-Watcher HEQ5 PRO
Guiding telescopes or lenses: Williams Optics Megrez 72
Guiding cameras: Starlight Xpress CoStar
Focal reducers: William Optics FF/FR VI
Software: PixInsight 1.8, PHD guiding, Nebulosity 3, EQMac
Filters: Astrodon Ha 5nm
Accessories: Starlight Xpress Mini Filter wheel
Dates: Feb. 16, 2014, Feb. 21, 2014
Frames: Astrodon Ha 5nm: 18×1800″ -20C
Integration: 9.0 hours

Author: Epicycle

AstroPhotography of the day by SPONLI
28 April 2014

The Sun Online and solar activity. April 27, 2014

NOAA 2038 produced the only C flare of the period (C2 peaking at 14:59UT), just before rounding the west limb. Current imagery shows 6 sunspot groups, most having magnetically simple configurations. One region developed overnight in the northwest quadrant, while two other regions rounded the east limb. There are also a few 15-20 degrees long filaments visible near the central meridian and in the southwest quadrant. C-class flares remain possible.   Solar wind speed decreased further from around 380 to 350km/s. Bz varied
between -4 and +3nT, and became predominantly northward around midnight. The particle stream from a small equatorial coronal hole that passed the central meridian early on 24 April, is expected to arrive at Earth later
today or tomorrow.
The geomagnetic field has been quiet and is expected to remain so. Locally, a brief active interval is possible from the effect of the coronal hole.
SIDC

Equipment: Coronado 90 +  Imaging Source DMK  + LX75
Processing: Photoshop, Avistack 300 frames
Date: 04/27/14
Time UT: 14:00
Exposure 1/500 sec.

With SPONLI Space is getting closer