Rainbow Halo Around Moon
Rainbow Halo around the Moon seen in Medan
On 02 November 2009 around 22.30 WIB in Medan, North Sumatra Indonesia, a magnificent view of rainbow halo around the moon appears in Medan. We have seen several Rainbow Halo around the Sun before in Medan, but just for tonight, it appears around the Moon!
picture of the rainbow halo around the moon as seen and taken from our rooftop
you can see the staircase of our rooftop its a rare sight for a rainbow halo to appear at night around the moon.
This halo moon sight occurs when high thin clouds containing millions of tiny ice crystals cover much of the sky. Each ice crystal acts like a miniature lens. Because most of the crystals have a similar elongated hexagonal shape, light entering one crystal face and exiting through the opposing face refracts 22 degrees, which corresponds to the radius of the Moon Halo.
In the study of meteorology, the term halo can refer to several optical phenomena whereas sunlight or moonlight is being either reflected or refracted (or a combination of both) by high altitude cirrus clouds, resulting in bright rings.
A ring of light 22 degrees from the moon (or sun) is the most common type of halo observed from earth and is formed by millions of hexagonal ice crystals with diameters less than 20.5 micrometers within the clouds.
A halo around the moon is often a warning that stormy weather is coming. The ice crystals that create halos come in cirrus clouds, which often come before warm fronts or other weather systems that can bring rain.
True enough, Badan Meteorologi Klimatologi dan Geofisika (BMKG) Indonesia warns of thunderstorms in several areas of Indonesia including North Sumatra as reported in MedanTalk.com.
Planet Jupiter and Moon Halo
Some good pictures of Moon Halo taken in other parts of the world with Planet Jupiter and Moon Halo!
picture of moon halo by Juan Carlos Casado
The town in the foreground of the above picture is San Sebastian, Spain. The distant planet Jupiter appears by chance on the halo’s upper right.
Jupiter and the full moon have been pleasingly close together all weekend on March 5th, Philippe Moussette of Québec, Canada, photographed them both surrounded by a lovely 22′ moon halo
Atmospheric optics expert Les Cowley remarks on Moussette’s image of the moon halo,that “it looks like two halos: (1) a 22º halo and (2) a circumscribed halo, which surrounds the 22º halo, touching it at the top and bottom.”
A similar Sun Halo may be visible during the day. Previous post and pictures of Rainbow Halo around the Sun in Medan