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User / jbarc in BC / Sets / Over 1000 Views
John Barclay / 541 items

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If you look closely in the right upper quadrant you can just see the Giacobini Zinner Comet from Mount Kobau near Osooyos, BC, Canada at 1,873 metres (6,145 feet) elevation. The red lights below on the left are from a telescope group that meet every summer on the mountain. I was just able to capture the comet with a 25 second time exposure on my Nikon D750 and Rokinon 14mm lens. I could not see it with the naked eye. There is a trace of the Milky Way behind it.

Comet Giacobini-Zinner was discovered on Dec. 20, 1900 by Michel Giacobini at the Nice Observatory in France. The comet was later discovered by Ernst Zinner in 1913 (October 23).

Comet 21P/ Giacobini-Zinner is a small comet with a diameter of 1.24 miles (2 kilometers). This comet takes about 6.6 years to orbit the Sun once. The last time comet Giacobini-Zinner reached perihelion (closest approach to the Sun) was on Feb. 11, 2012. The current perihelion passage is in 2018.

Each time that Giacobini-Zinner returns to the inner solar system its nucleus sprays ice and rock into space. This debris stream results in an annual meteor shower: the Draconids, which take place each year in early October. The Draconids radiate out of the northern constellation of Draco the dragon. Most years the shower is weak, and many times very few meteors are seen. However, there are also Draconid meteor storms (sometimes called Giacobinid meterors) on record. A meteor storm is observed when one thousand or more meteors are seen per hour at the location of the observer. During its peak in 1933, 500 Draconid meteors were seen per minute in Europe. 1946 was also a good year for the Draconids, where 50 -100 were seen per minute in the U.S.

In 1985 (Sept. 11) a re-purposed mission named ICE (International Cometary Explorer, formally International Sun-Earth Explorer-3 ([ISEE-3]) was sent to gather data from this comet. ICE was the first spacecraft to fly by a comet. ICE later joined the famous "armada" of spacecraft sent to comet Halley in 1986. Another mission named Sakigaki from Japan was scheduled to fly by this comet in 1998. Unfortunately, the spacecraft lacked sufficient propellant to reach the comet.

Comets are usually named for their discoverer(s) or for the name of the observatory/telescope used in the discovery. Since both Michel Giacobini and Ernst Zinner discovered and recovered this comet it is named for them. The letter "P" indicates that Giacobini-Zinner is a periodic comet. Periodic comets have an orbital period of less than 200 years.

Tags:   comet Giacobini Zinner galaxy space sky stars Milky Way Mount Kobau Osoyoos Okanagan BC Canada time eposure night clouds trees astrophotography

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Alex Fraser Bridge, Delta BC Canada

Tags:   bridge B&W vision tripod long exposure neutral density filter span support

N 28 B 1.1K C 81 E Oct 25, 2011 F Apr 12, 2012
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Antelope Canyon
Page, Arizona

Tags:   Antelope Canyon Page Arizona canyon HDR light cave rock blinkagain

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5 minute long exposure
Oak Creek
Sedona, Arizona
In Explore Nov 28/15

Tags:   Oak Creek Slide Rock Canyon Arizona Sedona creek water river stream rocks

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Found this festive tree during some last minute shopping today. Merry Christmas and Happy New Year to all my Flickr friends and contacts. Snapped with my iPhone 6s.

Tags:   Xmas Christmas lights mall tree shopping Merry Christmas Happy New Year 2019


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