I've found Alan's comments informative. I must confess that I have some concerns about the recent increase in the claims to binary asteroids ased on an...
"Huge Asteroid Hurtles Toward Earth" (UPI) http://www.postchronicle.com/news/science/article_21225902.shtml "Small asteroid to fly by Earth without danger:...
Peiser, Benny
B.J.Peiser@...
Jul 1, 2006 11:28 am
17191
Excellent response and I totally agree with Dave on this; the sudden increase in reported binary nature of minor planets, based entirely on light curves, would...
So what is wrong when so many NEOs/Hungarias/MBAs turn out to be binary? Maybe just our naive picture of them we had (have?) so far... I don't see the same...
JPL#33 solution for orbital elements of 2004XP14 gives close approaches to Moon in the next 100 years: date distance [AU] 2006 7 3.233...
Ireneusz Wlodarczyk
astrobit@...
Jul 2, 2006 8:04 am
17194
I have put in a folder called ancient records several photos that depict a close fly by of a pair of asteroids or and asteroid and comet. I took the liberty...
... I am afraid it is nonsense to make any post-prediction for the position of Apophis at epochs prior of 1850-1900. During the past century, the asteroid has...
Hello, perhaps somebody can help me in identifying the object (a ... COD A18 OBS B. Brinkmann MEA B. Brinkmann TEL 0.2-m f/5.8 Schmidt-Cassegrain + CCD ACK...
... It was 2001 19D catalog number 26769. This is a BLOCK DM rocket body used in the launch of a geostationary comsat from Baikonur. It has an orbit which...
I caught this rock but it was tough! Could not have done it without a good goto mount. The MPC ephemerides were off, the cloud cover broke just in time,etc. I...
It was easy from Big Bear, CA. The clouds were around but the thing was so bright that it did not matter. Got nice almost 4 hour arc in RA and Dec. MPC ...
Robert, You're right...the MPC is not at fault. I just downloaded a fresh ephemeris and have reaquired XP14-It's right were its supposed to be. Guess I...
MPC just rejected (with a special message, courtesy of Gareth) my 6 observations of this object during 7-3-06 night. I observed the object - no other similar...
I would think that accurate time would be the issue. For a fast mover, there are several issues. Firstly, you must have an accurate time source (Internet time...
During July 3, 2004XP14 travelled at between 400" to around 233"/mimute. Using 300" per minute as an average (i.e. 5" per second), in order to get within 1" of...
It appears that I have to 'write off' my observations as a contribution to the astrometry. Thanks for the comments and, generally speaking, the time cannot be...
... More than just fun, it will be useful. ******************************************************************* Alan W. Harris Senior Research Scientist Space...
... Ideally, yes. In practice I would rely on NTP to synchronise the time on a web server. For anything more demanding I would use GPS. -- Michael Smith...
Michael Smith
michael.smith@...
Jul 5, 2006 1:21 am
17210
It appears that it did not do for me or I had additional sources of errors. As some write here, the radar people can do much better astrometry of nearby ...
But the experimental data is at hand, since Ladislav has the data, and the post-radar orbit will have effectively zero ephemeris error at the time of the close...
bas
bas@...
Jul 5, 2006 2:32 am
17212
I am about to do just that. I have already started but plotting my data against the MPC ephemerides over a an arc of more than an hour is not particularly...
... Actually, I measured the latency of the CFHT Megaprime shutter using 2004 EW when it was moving about 500 arcsec per hour. I allowed the time to slide by...
Dave Tholen
tholen@...
Jul 5, 2006 8:19 am
17214
I have been completely unaware of the issue of latency of the shutters resulting in a significant uncertainty about the exposure time. I have SBIG ST8 camera...
I have no particular solutions. Just a general awareness that when it comes to issues of accurate time and you don't have access to precise timing equipment to...
Thank you all for all valuable comments. I never tried to 'do' occultations but the techniques described below should be considered for astrometry of fast...
http://www.ifa.hawaii.edu/info/press-releases/PS1_dedication/ New Telescope Dedicated on Haleakala University of Hawaii Press Release July 5, 2006 The...
Ron Baalke
baalke@...
Jul 6, 2006 5:20 pm
17218
Did anyone else attempt a lightcurve of 2004 XP14? I took unfiltered CCD series on UT July 5 (2 hours total), July 6 (5 hours), and July 7 (5 hours); with very...
