Daily Archives: June 16, 2014

The Sun Online and solar activity. June 16, 2014

The strongest flare during the past 24 hours was the M1.0 flare peaking at 00:01 UT today in the NOAA AR 2087 (Catania number 81). The photospheric magnetic field of this sunspot group decayed to the beta configuration, so we do not expect this group to produce significant flaring activity anymore. The flare was accompanied by coronal dimmings and a post-eruptive arcade indicating the eruption of a CME. However, no CME was detected by SOHO/LASCO due either to the narrow angular extent of the CME, or to the
confinement of the eruption to the low corona. In any case, no significant geomagnetic impact is expected. We expect flaring activity to continue on the C-level, especially in the NOAA AR 2089 (Catania number 82) that now has beta-gamma-delta configuration of its photospheric magnetic field, and in still unnumbered active regions that just appeared from behind the south-east solar limb. An M-class flare is possible but not very likely. The Earth is currently inside a slow (around 350 km/s) solar wind flow with slightly elevated (around 6 nT) interplanetary magnetic field magnitude. The geomagnetic conditions are quiet and are expected to remain so. 


APOD Heatmap 

Image Credit: Stuart Lowe, LCOGT/Virtual Sky

The first APOD appeared 19 years ago today. To help celebrate, APOD brings you today an all-sky heatmap of (nearly) 19 years of APOD entries. The brighter a region appears on the above heatmap, the more APODs that occur in that region. Clicking anywhere on the map will bring up a link to all APODs, if any, that appear nearby. We at APOD again thank our readers, NASA, astrophotographers, volunteers who translate APOD daily into over 20 languages, volunteers who run APOD’s over 20 mirror sites, volunteers who answer questions and administer APOD’s main discussion board, and volunteers who run and update APOD’ssocial media sites and smartphone applications for their continued support.

NASA APOD 16-Jun-14

M 78 in Orion

The nebula Messier 78 (also known as M 78 or NGC 2068) is a reflection nebula in the constellation Orion. It was discovered by Pierre Méchain in 1780 and included by Charles Messier in his catalog of comet-like objects that same year.

M78 is the brightest diffuse reflection nebula of a group of nebulae that include NGC 2064, NGC 2067 and NGC 2071. This group belongs to the Orion Molecular Cloud Complex and is about 1,600 light years distant from Earth. M78 is easily found in small telescopes as a hazy patch and involves two stars of 10th magnitude. These two stars,HD 38563A and HD 38563B, are responsible for making the cloud of dust in M78 visible by reflecting their light.

About 45 variable stars of the T Tauri type, young stars still in the process of formation as well as some 17 Herbig–Haro objects are known in M78.

Imaging telescopes or lenses: Meade Starfinder 10″
Imaging cameras: QSI 683wsg-8
Mounts: Losmandy G11
Guiding cameras: The Imaging Source DMK41AF02.AS
Software: Main Sequence Software Sequence Generator Pro, PHD guiding, PixInsight, photoshop
Filters: B, R, L, Astronomik Green
Dates: Jan. 4, 2014
Frames: 48×300″
Integration: 4.0 hours

Author: Andrew Lockwood
AstroPhotography of the day by SPONLI
16 June 2014