67P (Churyumov-Gerasimenko)

Celestial visitors from the edge of the Solar System.
Christopher K.
Posts: 4335
Joined: October 12th, 2009, 3:28 pm
Location: Baton Rouge, LA

Re: 67P (Churyumov-Gerasimenko)

Post by Christopher K. » October 11th, 2015, 6:22 pm

Comet Churyumov-Gerasimenko was number four on Jane Houston Jones' countdown list in the "What's Up for October 2015" video. However, I'm not really sure how easy it will be to view this object from Baton Rouge.

Below are the times during which 67/P is at least twenty-five degrees up in the Baton Rouge sky during darkness...
12 October = 5:00am to 5:44am
13 October = 4:59am to 5:45am
14 October = 4:58am to 5:45am
15 October = 4:57am to 5:46am
16 October = 4:56am to 5:47am
17 October = 4:55am to 5:47am
18 October = 4:54am to 5:48am
19 October = 4:53am to 5:48am
During this entire time the comet is in Leo (along with Venus, Mars and Jupiter). On 15 October it will lie less than a quarter-degree northeast of magnitude 3.5, B-class Eta Leonis. The comet is probably magnitude 11 or 12 right now.

Christopher K.
Posts: 4335
Joined: October 12th, 2009, 3:28 pm
Location: Baton Rouge, LA

Re: 67P (Churyumov-Gerasimenko)

Post by Christopher K. » October 14th, 2015, 10:36 pm

Good luck to anyone who attempts spotting C-G next to Eta Leonis in a few hours. I'll be wrapping up my viewing between 12am and 12:30am and so will miss the attempt.

fred8615
Posts: 185
Joined: October 12th, 2009, 12:29 pm
Location: Sorrento, LA

Re: 67P (Churyumov-Gerasimenko)

Post by fred8615 » February 4th, 2016, 11:16 am

Gravity measurements taken by the orbiting Rosetta spacecraft show the body of comet 67 P/Churyumov-Gerasimenko is about 75 percent dust and 25 percent ice all the way through, research published Wednesday shows.

By measuring slight shifts in radio waves transmitted to and from Rosetta, scientists were able to determine how the comet’s gravity affected the spacecraft. They found that 67P is a highly porous body with about four times more dust than ice by mass, and twice as much dust as ice by volume.

The density is consistent throughout the nucleus, without large voids. The discovery supports previous findings by two other Rosetta science teams.

Full article here: http://news.discovery.com/space/rosetta ... 160203.htm
Frederick J. Barnett
"Someone's got to take the responsibility if the job's going to get done!! Do you think that's easy?!" Gregory Peck - The Guns Of Navarone

Christopher K.
Posts: 4335
Joined: October 12th, 2009, 3:28 pm
Location: Baton Rouge, LA

Re: 67P (Churyumov-Gerasimenko)

Post by Christopher K. » September 29th, 2016, 2:47 pm

The Rosetta mission is coming to an end, and NASA is joining the European Space Agency in the "goodbye". Both NASA-TVs will broadcast (beginning at 5:15am CDT tomorrow) the live feed from the European Space Operations Centre in Darmstadt. Then, live interviews with Rosetta personnel will be shown on NASA-TV3 at 7am CDT (there will be replay on both NASA-TVs at 12pm CDT and 8pm CDT tomorrow).

The Southwest Research Institute developed the Alice instrument, and NASA contributed (among other things) the Ion and Electron Sensor.

Churyumov-Gerasimenko at this time is in Virgo; it will be rounding the back of the Sun around the middle of October. It will cross from Virgo into Libra in the early evening of 17 December.

More information:
http://www.nasa.gov/press-release/nasa- ... -touchdown

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