Because ISON is approaching Earth from the morning side, potential comet-watchers will need to view it about two hours before sunrise. ISON lies low in the east before dawn, just north of the hazy glow of the Beehive star cluster M44, which lies in the constellation Cancer the Crab. That nearby bright orange “star” is actually the planet Mars.
via September provides your first peek at Comet ISON – Astronomy Magazine.
Well this is rather exciting news: Comet ISON lives on! we think…
For several weeks now, ground-based observers have been blind to Comet ISON as our local star was sitting directly between us and the comet. We knew this was a temporary problem, and we expected that by the end of August, ground-based observers would begin to detect Comet ISON, so long as it hadnt fizzled out during that time. So now I am delighted to share two pieces of good news: first, that ISON is still alive and well, and secondly that it has been recovered a couple of weeks earlier than I would have expected!
This is pretty exciting. Soon we will have magnitude readings and should know if ISON has brightened.
via Comet ISON lives on! we think… | The Planetary Society.
The website http://theskylive.com/ has a tracker page dedicated to ISON. Listing coordinates, the distance fron the Sun, the distance from the Earth and a countdown to Perihelion. Pretty cool.
Comet ISON (C/2012 S1) Tracker – The Sky Live.
ISON began its dangerous journey toward the inner solar system about 10,000 years ago, when it left a distant band of icy space rocks in the Oort cloud. But scientists and skywatchers only became aware of ISON last year. Heres a look at what scientists have learned about the comet since then, and what to expect in the months and days ahead.
A must read. Space.com has a great timeline of milestones and what to expect from ISONin the coming months.
via Comet ISON: A Timeline of This Years Sungrazing Spectacle | Space.com.
To readily observe the dim, fuzzy blob of ISON prior to June 22, you would have needed a very dark sky and a telescope with at least 20 inches 50.8 centimeters of aperture, if not more. Comet ISON is too close to the bright twilight, but that will change after the first week of August as ISON — then a morning object — begins a slow emergence into the morning sky.
Both amateur and professional astronomers will have their fingers crossed that by early August ISON will have shown significant brightening since it was last seen in late June.
Must read article on everything ISON to date.
via Will a Comet ISON, the Comet of the Century, Get Brighter? | Space.com.
So my forecast is that Comet ISON will develop more slowly in the autumn morning sky than initially thought. It won’t reach naked-eye detectability until around the 10th of November, about three weeks before rounding the Sun. It will brighten steadily but not exceed 2nd or 3rd magnitude before disappearing into the morning twilight just a week shy of its November 28th perihelion. At that time a short, not particularly bright tail should trail the comet’s intensifying coma.
via Comet ISON Approaches – Observing Highlights – SkyandTelescope.com.
NASAs Deep Impact Spacecraft Eyes Comet ISON
This is the orbital trajectory of comet C/2012 S1 ISON. The comet is currently located just inside the orbit of Jupiter. In November 2013, ISON will pass less than 1.1 million miles 1.8 million kilometers from the suns surface. The fierce heating it experiences during this close approach to the sun could turn the comet into a bright naked-eye object Image Credit: NASA/JPL-Caltech›
26February 05, 2013PASADENA, Calif. – NASAs Deep Impact spacecraft has acquired its first images of comet C/2012 S1 ISON. The images were taken by the spacecrafts Medium-Resolution Imager over a 36-hour period on Jan. 17 and 18, 2013, from a distance of 493 million miles 793 million kilometers. Many scientists anticipate a bright future for comet ISON; the spaceborne conglomeration of dust and ice may put on quite a show as it passes through the inner solar system this fall.
via NASAs Deep Impact Spacecraft Eyes Comet ISON – NASA Jet Propulsion Laboratory.