THE ASTRONOMER Electronic Circular No 236 1989 Jan 05 19.04UT. Telecom Gold 72:MAG60138 Ed:Guy M Hurst, 16, Westminster Close, Kempshott Rise, Basingstoke, Hants, RG22 4PP, England. Telephone:(0256)471074.Int:+44256471074 Telex:265871(MONREF G) Quote"72:MAG60138 ATT G.HURST"in FIRST line. ------------------------------------------------------------------- COMET YANAKA (1989a) Denis Buczynski, Conder Brow reports astrometry: 1989 Jan 4.25556 RA13h50m03.01s DEC +10 08'40.5"(1950) 0.55-m refl. 7 AGK3 Stars used. Brian Manning also provides positions: 1989 Jan 5.24928 RA13h52m02.80s DEC +10 28'09.2"(1950) 1989 Jan 5.26165 13 52 04.14 +10 28 24.3 (1950) 0.26-m refl. 7 SAOC reduction. COMPUTER PROGRAM APPEALS N.James (MAG90713) e-mails: "I am currently writing a program which requires 1950 epoch solar cartesian coordinates accurate to the sixth or seventh decimal place. At present I have to enter these coordinates manually. Can anyone help with algorithms or programs to automate the process?" G.Hurst (MAG60138): "I urgently need a program in basic to convert RA and DEC for any equinox to another eg 1950 to 2000 etc. I am not an experienced programmer so a simple listing for Commodore 64 would be ideal!" Guy M Hurst