HEAO-1 Observations

G. J. Fishman writes: "The HEAO-1 spacecraft continues to operate very well. Pointed observations are being made about 4 to 5 times per week for 3 to 6 hours. At all other times the spacecraft will be in its normal scanning mode: 90o from the sun with a rotation period of ~ 35 min. The latest pointing information may be obtained from one of the HEAO-1 investigators or from me at the address: NASA Headquarters, Code SC-7, Washington, DC 20546, U.S.A. (telephone 202-755-3616). Upcoming objects for which simultaneous optical and radio coverage would be desirable include AM Her (Apr. l8d06h00m-18d12h00m UT) and YZ CMi (Apr. 20d14h00m-20d20h00m UT)."