Subject: star catalog along path of Pluto
From: Norbert Zacharias <[email-masked]>
To: [email-masked]
Cc: [email-masked], [email-masked], [email-masked], [email-masked]
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: [email-masked]
------------------------------------------------