From: Norbert Zacharias To: layoung@boulder.swri.edu Cc: gaume@usno.navy.mil, miz@usno.navy.mil, jrp@nofs.navy.mil, trudy@nofs.navy.mil Subject: star catalog along path of Pluto Date: Fri, 20 Oct 2006 07:54:38 -0400 061020 Hi Leslie, finally, here is our catalog for the Pluto path, all 2006 observations combined. The data are at anonymous ftp ad.usno.navy.mil/users/nz/ files: cpos_07.p = ASCII data file with star positions cpos_07.ps = sky plot of all stars in catalog There are 157,451 stars with "good" positions, completeness about 90% (i.e. some stars are missing for one reason or another). The first and last few lines are: 984001505 256280091 1407 21 1 2 1 9409 983689378 256281405 1499 17 82 2 0 9412 984394530 256283514 858 27 24 2 0 9429 983763266 256283543 1326 20 22 4 0 9424 984350699 256283960 1339 20 9 4 0 9424 ... 955308751 269374784 1425 60 48 3 0 9307 955209814 269374878 1429 28 3 2 0 9310 953809282 269376267 1574 59 44 3 0 9308 954529428 269378341 1430 4 91 3 0 9305 953784380 269378394 1593 59 22 3 0 9303 Explanation of columns: 1 RA (mas) on ICRF, epoch of observation 2 SPD (mas) on ICRF, epoch of observation 3 mag (1/100), UCAC-type magnitude (between V and R) 4 sigx (mas) formal std.error along RA*cos(Dec) 5 sigy (mas) formal std.error along Dec 6 nobs number of observations (CCD frames) used 7 flag 0 = field star, else= various ref.star codes 8 epoch of observation, 1/1000 year after 1997.0 The data are sorted by declination and this time we checked for "close doubles" and there should not be any duplicate entries either. About 500 individual CCD frames went into this program and we plan on a publication including astrograph-to-astrograph proper motions once the UCAC3 is ready. We already have an epoch difference of about 8 years! The occultation stars you look for are included and also listed here, with differences in the last 2 columns: Name Oc Date (UT) priority ra dec V dec(mas) SPD(mas) P384.2 2006 Jun 12 1 17:41:12.0940 -15:41:34.466 15.11 955081410 267505534 yes 249 15 15.11 955081161 267505519 P415 2006 Oct 31 1 17:38:28.712 -16:18:05.654 14.60 952630680 265314346 yes 15 -22 14.62 952630665 265314368 P435 2007 Feb 3 2 17:51:50.378 -16:32:32.022 12.83 964655670 264447978 yes 6 9 13.01 964655664 264447969 P438 2007 Feb 13 2 17:52:52.952 -16:32:00.973 14.07 965594280 264479027 yes 44 11 14.04 965594236 264479016 P445.3 2007 Mar 18 2 17:55:05.692 -16:28:34.456 15.25 967585380 264685544 yes -20 -78 15.43 967585400 264685622 P434 2007 Feb 1 3 17:51:36.719 -16:32:36.320 11.44 964450785 264443680 yes -3 33 11.44 964450788 264443647 P456 2007 May 12 3 17:53:31.955 -16:22:47.043 13.29 966179325 265032957 yes -61 -21 13.31 966179386 265032978 P495.3 2007 Jul 31 3 17:45:41.980 -16:29:31.653 13.25 959129700 264628347 yes -85 23 13.27 959129785 264628324 P507 2007 Sep 27 3 17:44:38.395 -16:46:35.446 8.74 958175925 263604554 yes 8 -43 8.71 958175917 263604597 All the observing was performed by Trudy Tilleman out at NOFS. Marion Zacharias reduced the data and I am just organizing and writing this letter. Please let me know if you have any questions or spot problems. We hope the data matches the requirements of our contract. This was the last program for the astrograph with its 4k camera and the instrument is taken apart for future upgrades. Norbert ------------------------------------------------ Norbert Zacharias, Ph.D. Chief of Cataloging and Requirements Division Astrometry Department US Naval Observatory voice: 202 762 1423 3450 Mass. Ave. NW fax: 202 762 1516 Washington, DC 20392 e-mail: nz@usno.navy.mil ------------------------------------------------