Dear users of Astrometrica, like 2002 in Visnjan and 2003 in Mallorca, the MACE (Meeting on Asteroids and Comets in Europe) will be held again in 2004. This ...
Due to technical problems at my ISP, the Astrometrica web site is down. I hope that the site will be available soon, otherwise I will (temporarely) move it to...
Dear All, the 1st Virtual Meeting on Amateur Astronomy (http://www.bellatrixobservatory.org/cvaa_en.html) is approaching! I wish to thank all the people who...
Dear list, I'm using Astrometrica for about three months, and I have a bit off-topic problem. With Astrometrica I've started to search known objects in all my...
Luca, ... Please consider that the MPCORB contains osculating elements, i.e. elements which are valid for a certain epoch. If you calculate ephemerides from...
... I tried it and it works. Though you must choose the ephemerides period to be around the epoch of the elements you want to get. And then only a truncated...
Dear Users of Astrometrica, I have moved the "Astrometrica" web page to a new web server. Until the DSN servers all around the world have been updated and link...
Hi, For the people who wants to use the Bill's Integrat software, there is one file missing in the download link (lunar.dll). I told him about this problem,...
Hello, I use Astrometrica since October 2003 for astrometric reductions at station 185-Vicques (CH). In my last night of measurements (2004.02.09) I always...
Michel Ory
pivatte@...
Feb 11, 2004 2:41 pm
1781
What objects or types of object is this one object or is it several different ones for the night, also have you tried it with an MPCORB file other than the one...
... The standard epoch in MPCORB is now K047E and this is the reason you get offsets for your objects. I just had a case yesterday and wondered how large the...
... Note that the offset is calculated from an unperturbed orbit, ***without taking planetary perurbations into account***, and it is provided for the purpose...
Thanks David. But the answer is done by Herbet Raab. Best Regards, Michel Ory ... From: <ddixon@...> To: <Astrometrica@yahoogroups.com> Sent:...
Michel Ory
pivatte@...
Feb 11, 2004 3:34 pm
1785
We also noticed this last week with the 24" at Mt Wilson while imaging NEO. At that time, we assumed that there was a timing error. However, 6 months was more...
Michel, Last week it was suggested in this list the use of the program Integrat developed by Bill Gray. With this program you can integrate the whole...
OK, I understand what EPOCHs are but started my involvement in astronomy in 2000 so it wasn't a big issue for me. Now does Astrometrica work to J2000 and...
The catalogues (UCAC2 and USNO A2) are both J2000 - correct? No.. It is my understanding that the UCAC2 uses the precessional data to provide accurate motions...
Hi David, I think you are confusing EPOCH and EQUINOX. The EQUINOX refers to the standardised date for the orientation of the celestial equator and zero point...
Robert McNaught
rmn@...
Feb 12, 2004 5:52 am
1790
Thanks Rob, Although I got the name wrong I kind of figured that the Equinox represented an agreed position reference. I just worry when using all these...
I've noticed that if I stack a lot of images to get a dim object that the reported magnitude seems too bright. Last night I used 3 sets of 20 1-minute frames...
Gil and list, ... Are you refering to K04C01Z? http://cfa-www.harvard.edu/mpec/K04/K04C49.html Your magnitudes look in good agreement with the ones reported by...
Actually I was referring to the comet that just came out: http://cfa-www.harvard.edu/mpec/K04/K04C52.html I'm upset with myself because that's the 2nd or 3rd...
I did forget to mention that I'm still using USNO A2.0. I actually did request and receive my UCAC-2 cd's but just haven't copied it to my drive and started...
Gil, ... and ... the higher the SNR, the better your measurements. That's what track and stack is supposed to do. Magnitudes derived from stacked images are...
Hi Reiner, ... I was wondering how Astrometrica determine the magnitude of a "tracked & stacked" object, but your answer have anticipated my question... ...
... Of course, you are tight, in that the size of the aperture is important for cometary photometry. In fact, with an apertue radius of 7 arc seconds, you...
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