Abstract
THE moon is full on April 4 at 4.3h and new on April 19 at 16.6h. The altitude of the full moon at transit at Greenwich on April 5d Oh 43m is 27°. Lunar conjunctions with the planets occur as follows: on April 10 with Mars; on April 16 with Venus; on April 17 with Jupiter; and on April 18 with Mercury. On April 22, Venus is in conjunction with Jupiter, the geocentric separation of the planets being only 0.4°. The two planets rise, however, less than one hour before the sun. Mercury is at inferior conjunction with the sun on April 3 and is therefore not visible. Saturn is in conjunction on April 11 and likewise rises and sets with the sun. Mars still remains a morning star, rising about 1½ in mid-April. Tho only bright stars occulted during the month are ψ Opliiuchi (mag. 4.6) on April 8 at 2h 2.9m (reappearance) as seen from Greenwich, and 26 Geminorum (mag. 5.1) on April 24 at 22h 12.lm (disappearance). Tho Lyrid meteors, the radiant of which is near 104 Herculis, are due at their maximum between April 19 and 22, but in some years they are nearly absent. All the above times are given in universal time (U.T.). Summer Time begins on April 16.
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The Night Sky in April. Nature 143, 515 (1939). https://doi.org/10.1038/143515c0
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DOI: https://doi.org/10.1038/143515c0