Sky Chart For The Month of April, 2018


ASTRONOMICAL BULLETIN FOR APRIL 2018

The Moon

Last Quarter occurs on 8th at h. 12-48 I.S.T.

New Moon occurs on 16th at h 7-27 I.S.T.

First Quarter occurs on 23rd at h. 3-16 I.S.T.

Full Moon occurs on 30th at h. 6-28 I.S.T.

The Lunar Crescent becomes first visible after the New Moon day in the evening of 17th.

The Moon is at Apogee or farthest from the Earth on 8th and at Perigee or nearest to the Earth on 20th.

The Moon passes about 4º north of Jupiter on 3rd, about 2º north of Saturn on 7th, about 3º north of Mars on 7th, about 2º south of Neptune in the early hours of 13th, about 4º south of Mercury on 14th, about 4½º south of Uranus on 16th , about 5½º south of Venus on 18th and about 4° north of Jupiter before midnight of 30th .                                                                                                                                                                                                                                                                                   

The Planets

Visibility of Planets :

Mercury: The planet is too close to the Sun to be visible upto 9th of the month, being in Conjunction with the Sun on 1st. Thereafter it becomes visible in the eastern sky, rises about ½ hour to 1 hour before sunrise upto second quarter of the month and about 1 hour to 1½ hours before it for the remaining days of the month. The motion of the planet becomes Direct with respect to the Earth from 15th. It is in Aphelion position or farthest from the Sun on 23rd.The planet is in Greatest Western Elongation of about 27º from the Sun on 29th.

Venus: The planet is a brilliant object visible in the western sky and sets about 1½ hours to 2 hours after sunset throughout the month.

MarsThe planet rises just after local midnight time upto first quarter of the month and about ½ hour before it for the remaining days of the month.

Jupiter: The planet rises about 3 hours to 2½ hours after sunset upto first quarter of the month, about 2½ hours to 2 hours after it upto second quarter of the month, about 2 hours to 1½ hours after it upto third quarter of the month and about 1 hour to ½ hour after it for the remaining days of the month.

Saturn: The planet rises about ½ hour after local midnight time to ½ hour before it upto second quarter of the month, about ½ hour to 1 hour before it upto third quarter of the month, about 1 hour to 1½ hours before it for the remaining days of the month.It is in Aphelion position or farthest from the Sun on 17th. Its motion becomes Retrograde with respect to the Earth from 18th.

Uranus: The planet sets about 1 hour to ½ hour after sunset upto first quarter of the month. Then the planet is too close to the Sun to be visible for the remaining days of the month, being in Conjunction with the Sun on 18th.

Neptune: The planet rises before sunrise and remains visible till the beginning of morning twilight throughout the month. It rises about 1 hour to 2 hours before sunrise upto third quarter of the month, about 2 hours to 2½ hours before it for the remaining days of the month.

 

Conjunction of Planet :

Mars passes about 1½° south of Saturn on 2nd.

Mars passes about 1½º south of Pluto on 26th.

 

Planets

Planets in Zodiacal Constellation

Magnitude

Mercury (Budha)

Remains in Pisces (Mina)

+3.7 to +0.3

Venus (Sukra)

        Moves from Aries (Mesha) to Taurus (Vrisha) on 20th.

-3.9

Mars (Mangal)

 Remains in Sagittarius (Dhanus).

+0.4 to +0.1

          +0.1 to -0.3

Jupiter (Brihaspati)

        Remains in Libra (Tula).  

-2.3 to -2.5

Saturn (Sani)

        Remains in Sagittarius (Dhanus).

 +0.5 to +0.3

Uranus

Remains in Aries (Mesha).

 +6.0

Neptune

Remains in Aquarius (Kumbha).

 +8.0

Source : : Director

Positional Astronomy Centre

India Meteorological Department

Salt Lake, Kolkata - 700 091