Abstract

COMET 1907a (GIACOBINI).—No. 4173 (p. 336, April 27) of the Astronomische Nacrichten contains a new set of elements for comet 1907a computed by Miss Lamson, in which the time of perihelion passage is given as March 17. A daily ephemeris, calculated by Prof. Kreutz and based on these elements, is also given, and extends to May 22. The comet is at present apparently travelling very slowly and nearly due north in the northern limits of Orion, its computed positions for May 9 and May 22 respectively being α=6h. 11m., δ= + 14° 7′.4 and α=6h. 14m., δ= +17° 5′.8. The brightness of this object is now about one-quarter of that at the time of discovery, when it was of the eleventh magnitude.

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