[an error occurred while processing this directive]
Calvin Observatory
Home
Hours
Directions
Weather Forecast
Cool Images
Equipment
Publications
Observing Request
External Links
 
Related Links
Wildrik Botjes Planetarium
Physics & Astronomy Department

Astr112 Photography Projects, Fall 2007

Previous imageUp to Class IndexNext image

Foxhead Cluster (NGC 6819), Adam Rush

Foxhead Nebula

Here we see the Foxhead open star cluster in the constellation Cygnus: A gorgeous entanglement of young blue stars set about as a burning, restless net lost deep within the abyss; yet this heavenly structure is neither of fire nor ice, but plasma. Buried clandestinely in the midst of the mist of hydrogen gases lurks the invisible gem, the center of gravity. It is a byproduct of seemingly mass futility — round which these lucid spheres of opportunity enclose and expand.

According to Nature

Nevertheless, each particle has a purpose that is defined by its constitution and relation to every other particle. Quarks, molecules, planetary systems, star-clusters and galaxies have ever been intertwined throughout time.

Man has taken this detail into his own description, out from nature and into his mind, via the scientific-method, observations and data-sets. A wonderful example of Mankind's desire for order is the NGC (”New General Catalogue”), created by J.L.E. Dreyer in the 1880s and initially formed on the astronomical investigations of William Herschel. Caroline Herschel, the wife of W. Herschel, is the first person in recorded history to contemplate and chronicle the Foxhead cluster (NGC 6819). This oasis, adrift in an infinite sea, flourishing then in all its majesty as it does today; archived with primitive telescopes but reserved for those with a much greater scientific and technological vision.

Facts of the Foxhead:

- With Deneb at its head and to the North, this open-cluster is located between above the right wing of Cygnus — i.e., five degrees south of delta-Cygni.

- The Foxhead registers in the 7.3 magnitude range, almost equal to the brightness of Neptune, and is therefore a bit too dim to be seen with the naked eye.

- Its apparent diameter is 5 arcminutes, about the width of the thumb at arms'-length.

References:

Jacobsen, Dean. "NGC 6819 Open Cluster." <http://astrophoto.net/ngc6819.html>

Hoskin, Michael. "NGC 6819" Students for the Exploration and Development of Space <http://www.seds.org/messier/xtra/ngc/n6819.html>.

Right Ascension (J2000) 19:41:33
Declination (J2000) +40°12'13"
Filters used blue(B), green(V), and red(R)
Exposure time per filter 50 seconds B, 25 seconds V, 25 seconds R
Date observed

October 24, 2007 (BVR)