Hi all, Could someone explain me how an observation of the occultation can be successful at 1319 km from the center of Pluto's shadow when the half-light ...
Jean-Claude Merlin
jcmerlin@...
Apr 1, 2007 10:41 am
19089
Its called atmosphere. All occultations by Pluto are characterised by atmospheric effects - with the atmosphere extending a considerable distance above the...
It looks me quite thick for Pluto's atmosphere (110 km and more) ? JCM ... From: Dave Herald To: MPML ; Jean-Claude Merlin Sent: Sunday, April 01, 2007 4:14 PM...
Jean-Claude Merlin
jcmerlin@...
Apr 1, 2007 3:08 pm
19091
Does not the half-light shadow radius imply that the radius is basically double the value given, but detection of the shadow at these distances is harder ...
I suggest people have a read about occultations of Pluto at: http://www.lesia.obspm.fr/~sicardy/18_march_07/ and note in particular the predicted light curves...
I will certainly look into this paper when I get done with NOAO observing proposals. Not knowing much about occultations I still wonder what exactly the term...
I'm assuming it is used in the context of - radius at which the light level is 50%. When you look at the references I've given, you should understand... Dave...
... It's the radius at which the signal from the star has been reduced to one-half the full amount. ... Although observers outside that radius will only record...
Dave Tholen
tholen@...
Apr 1, 2007 8:59 pm
19096
Maybe I'll just sleep in tonight.... Clear Skies! - Bert ********************************** Bert Stevens, Co-Director Desert Moon Observatory, MPC #448 Las...
Hi Frederick, The orientation of the orbit of the Antiope's system is included in the paper by Descamps et al 2007 (Icarus, 187, 482-499). I would like to...
Tadeusz Michalowski
tmich@...
Apr 2, 2007 10:29 am
19098
Greetings Group: I was wondering if someone here might be able to compute the next Uranus/Vesta conjunction or close approach. I am looking for the next event...
Greetings: Thanks for the upcoming events Bill, but I am looking for Uranus/Vesta conjunctions events only. I have used Guide to search this but stopped around...
The orbital inclination of Uranus is about 0.7 deg. That of Vesta is about 7 deg. Consequently 'close' conjunctions will only occur when Uranus is somewhere...
... Lawrence , The conjunctions of Uranus and Vesta with both being less than mag 6, as you specified, require conjunctions near Vesta's opposition so that...
... Here is a list of all the conjunctions in right ascension between Uranus and Vesta, between 1700 and 2300, with Vesta at a magnitude lesser than 7.0 (the...
Prof. Aldo Vitagliano gave an interesting list of conjunctions between Uranus and Vesta. Just a few comments: (1) Notice the triple conjunctions of the years...
Jean Meeus
JMeeus@...
Apr 3, 2007 9:45 am
19105
On a similar vein to this. Instances where a planet occults another planet are quite rare, but there are usually several in a millennia. Instances where an...
Dave Herald wrote: < Instances where an asteroid transits a planet (esp. Jupiter < or Saturn) must be rather more common - although still very < rare. I'm...
Jean Meeus
JMeeus@...
Apr 3, 2007 1:36 pm
19108
Hi Lawrence, "...I am looking for Uranus/Vesta conjunctions events only." That's what I listed. They occur at roughly four-year intervals (except for some...
Greetings: Thanks for all the conjunction help. I too was thinking about a transit of an asteroid over a planet today, and that is also posted! I was after any...
... See http://cfa-www.harvard.edu/iau/MPCStatus.html MPC Webserver machine 2007 Mar. 29: 17:48. It appears that the MPC webserver machine hung again around...
My goodness.....sounds like MPC might be in the market for a new web server machine. Where are those Sunday newspaper Dell ads when you need them.... My...
Dave Herald wrote: < So, on a very crude statistical estimate, a numbered < asteroid should transit one of the major planets < about once every 3 years or...
Jean Meeus
JMeeus@...
Apr 4, 2007 12:05 pm
19114
These results are interesting. Re my estimate - that was a 'back of the envelope' guesstimate. I'm pleased to see that I under-estimated. The other aspect to...
... Many thanks for the blessing. Maybe some other member can share the blessing: I was born on Nov. 30, 1948. :-) I couldn't resist to search all the...
This is an interesting list - if only for an understanding of the statistics. [And the fact that no-one has considered this phenomena in the past adds to its...
Hi Jean and Aldo, I was giving some thought to the types of asteroid transits that would provide a satisfying, visibly detectable event. Obviously nothing is ...
