Content-type: text/html Manpage of j2000

j2000

Section: User Commands (1)
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NAME

j2000 - Convert 1950 catalog positions to j2000.  

PERSON RESPONSIBLE

wh  

CATEGORIES

utility  

DESCRIPTION

J2000 is a Miriad task which converts 1950 catalog positions to j2000 epoch. This routine follows the prescription for transforming from the Epoch 1950.0 Radio Source Position Catalog to the new J2000 catalog. - RSF 10 May 1989
    Tested against the vla calibrators list with accuracy
    of .004 sec in RA and .02" in DEC - WH  20-oct-1991
See also the task REGRID for converting data between 1950 and 2000 coordinate frames. See also the task "skycoor" in wcstools for this (and the inverse) conversion.  

PARAMETERS

ra
1950 Right Ascension. This can be given as decimal hours or hh:mm:ss.ss format. Default=0.
dec
1950 Declination. This can be given as decimal degrees or dd:mm:ss format. Default=0.
oyear
Observation year is needed for best accuracy. Defaults to 1990.


 

Index

NAME
PERSON RESPONSIBLE
CATEGORIES
DESCRIPTION
PARAMETERS

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Time: 18:35:38 GMT, July 05, 2011