TRIBUNPEKANBARU.COM – Throughout April 2021, there are 14 astronomical phenomenon will happen.
When confirmed, researchers from the Center for Space Science Institute of Aviation and Space (Lapan) Andi Pangerang confirmed astronomical phenomenon throughout the month.
“Details are on the website edukasi.sains.lapan.go.id, “said Andi when contacted Kompas.com, Friday (2/4/20 afternoon.
Here are 14 astronomical phenomenon which will occur April 2021 and the date:
1. Moon-Antares Conjunction: April 1-2
At the beginning of the month, astronomy lovers can witness natural events in the form of the peak of the Moon-Antares conjunction.
This phenomenon occurred on April 2, 2021 at 03.49 WIB, for central Indonesia at 04.49 WITA, and for eastern Indonesia at 05.49 WITA.
However, this phenomenon has been witnessed since April 1 at 21:45 local time from the East-Southeast direction until the next morning, when the maritime dawn ends from the West-Southwest direction.
The angle of separation varies from 6.64 degrees to 4.58 degrees.
Antares’ magnitude is 1.05, while the Moon Illumination fraction varies from 79.3 percent to 77.2 percent (Late Shrink / Convex Month).
2. End of the Phase of the Moon of the Month: April 4
The final bandage phase is one of the phases of the Moon when the configuration between the Sun, Earth, and Moon forms a right angle (90 degrees) and occurs after the Full Moon phase.
The peak of the final bandage phase occurs at 17.02 WIB or 18.02 WITA or 19.02WIT.
This final lunar moon can be seen as it rises before midnight from an east-southeast direction, accumulates in the south toward sunrise and then sets in a west-southwest direction around noon.
The moon is 376,541 kilometers from Earth (geocentric) and is in the vicinity of the constellation Sagittarius.
3. Moon-Jupiter-Saturn Triple Conjunction: April 6-8
The moon will experience triple conjunction with Jupiter and Saturn for three consecutive days from April 6-8, 2021.
You can witness this natural phenomenon in the East-Southeast direction near the Capricornus constellation from 03.00 local time until the maritime dawn ends.
Jupiter’s magnitude varies slightly from -2.08 to -2.09, while Saturn’s magnitude is constant at +0.75.
The moon, with a final crescent phase, when conjunction with triple illumination varies from 34.4 percent to 15.8 percent.
4. New Moon Phase and Moon-Venus-Sun Conjunction (Triple): April 12
The new Moon phase, also called the solar lunar conjunction, is a configuration when the Moon lies between the Sun and Earth and is in line with the Sun and Earth.
Given the Moon’s orbit which forms an angle of 5.1 degrees to the ecliptic, the Moon’s shadow does not always fall on the Earth’s surface during a new Moon phase, so the new Moon phase does not always coincide with a solar eclipse.
This new moon phase occurs on April 12, precisely at 09.30 WIB or 10.30 WITA or 11.30 WIT, 403,642 km from Earth (geocentric) and is located in the Pisces constellation.
5. Apoge Month: April 15th
The Moon Apogee is the configuration when the Moon is farthest from Earth. This is caused by the Moon’s elliptical orbit towards Earth.
Apogee Moon can be observed when it rises at 11.00 local time from the East-Northeast direction, culminates in the north at around 17.00 local time and then sets in the west-northwest direction at around 23.00 local time.
The moon is 406,137 km from Earth and is in the vicinity of the constellation Aries with 6.1 percent illumination (early crescent) when it apogee.
6. Occultation of Mars by the Moon: April 17th
After the Moon Apoge, next there is the occultation of Mars by the Moon which is astronomical phenomenon when Mars crosses behind the Moon so that it appears to be covered by the Moon.
This is because the distance from Mars to Earth is farther than the distance from the Moon to the Moon. Globally, the occultation of Mars by the Moon occurred on April 17 from 16.25 WIB to 21.35 WIB.
Areas that can witness this natural phenomenon are eastern India, Sri Lanka, Nepal, Bangladesh, Myanmar, Vietnam, Cambodia, Thailand, Malaysia, Singapore, Brunei Darussalam, and western Indonesia.
Meanwhile in Indonesia, the Mars Occultation can be witnessed in Sumatra, Kalimantan, Banten, DKI Jakarta, West Java, Central Java and Yogyakarta.
7.Mercury Superior Conjunction: April 19
Mercury experienced superior conjunction on April 19 at 8.56 WIB.
Lapan explained that Mercury’s superior conjunction is a configuration that applies specifically to Mercury and Venus, which is when Mercury, the Sun, and Earth lie in a straight line and Mercury is turning its back on the Sun.
This superior conjunction marks the reversal of Mercury’s reappearance when dawn becomes dusk.
8. Moon-Pollux Conjunction: April 19
On the same date, the peak of the Month-Pollux conjunction took place at 01.18 WIB or 02.18 WITA or 03.18 WITA.
However, this natural phenomenon can already be witnessed the day before at sea dawn from north-northwest to before midnight from the west-northwest direction.
The angle of separation varies from 4.72 degrees to 3.68 degrees.
The Antares magnitude is +1.15, while the lunar illumination fraction varies from 41.7 percent to 43.2 percent.
9. Early Bandage Moon Phase: April 20
The initial bandage phase is one of the phases of the Moon when the configuration between the Sun, Earth, and Moon forms right angles and occurs before the full moon phase.
The peak of the initial phase of the moon at 13.58 WITA or 14.58 WITA or 15.58 WIT.
Lapan said this natural phenomenon can be witnessed when it rises 30 minutes after noon from an east-northeast direction, culminates in the north at sea twilight and then sets in a west-northwest direction 30 minutes after midnight.
10. Mercury-Venus Conjunction: April 21-30
Mercury will conjunction with Venus for 10 consecutive days.
The Mercury-Venus separation angle was initially 4.02 degrees, then tapered off to 1.18 degrees when the conjunction peaked on April 25 and the following day, the Mercury-Venus separation angle expanded to 4.09 degrees.
11. Lyrid Meteor Showers: April 22-23
The Lyrid meteor shower is an annual meteor shower whose radian point is in the constellation Hercules near Vega, the brightest star in the Lyra constellation.
It is known that the Lyrid meteor shower came from the dust from the comet C / 1861 G1 Thatcher. Actually, this meteor shower was active from April 16-25, but the peak occurred on April 22 at 19.00 WIB or 20.00 WITA or 21.00 WITA.
Lapan said that this natural phenomenon could be observed since it rose in the northwest at around 22:15 local time until the maritime dawn ended the next day.
12. Perige Full Moon (Super Moon / Supermoon): April 27th
The peak of this full moon will occur at 10.31 WIB or 11.31 WITA or 12.31.29 WIT with a geocentric distance of 357,616 km, an angular diameter of 33.41 arc minutes and is located in the Libra constellation.
Meanwhile, the perige (orbit of a celestial body closest to the earth) of the Moon occurs at 22.29 WIB or 23.29 WITA or 00.29 WIT with a geocentric distance of 357,378 km, an angular diameter of 33.43 arc minutes and is located in the Libra constellation.
As for the mention of the Moon Super or Supermoon because the distance is quite close to the point of perige.
13. Perihelion Merkurius: 27 April
Still on the same date, the Mercury perihelion occurred. Perihelion in general is the configuration when the planet is at its closest point from the Sun.
Mercury’s perihelion occurs every 88 days on average or four times a year.
Mercury perihelion in April, will occur on 27 Aparil at 08.48 WIB or 09.48 WITA or 10.48 WIT with a distance of 46 million km from the Sun.
Mercury’s perihelion previously occurred on January 29 and the next series will occur July 24 and October 20, 2021.
14. Moon-Antares Conjunction: April 28-29
This April natural phenomenon is closed with the second Moon-Antares conjunction. This is because the sidereal period of the Moon is 27.32 days.
The peak of the Month-Antares conjunction occurred on April 29 at 13.07 WIB or 14.07 WITA or 15.05 WITA.
However, this phenomenon can be witnessed the day before at 20.00 local time from the east-southeast direction until the next morning when the maritime dawn comes from the west-southwest direction.
This article was published on Kompas.com entitled “14 Astronomical Phenomena April 2021, Yes Meteor Rain
-to the Super Moon “,