astronomical events 2012

7/29/2019 Astronomical Events 2012

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ASTRONOMICAL EVENTS

AND WEATHER DISTURBANCES

(From August to September 2012)

Anna Marie L. Fajardo

Natural Science 2


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ASTRONOMICAL EVENTS

AUGUST 7-14, 2012SPICA, SATURN AND MARS AT DUSKS

The planets Saturn and Mars and the star Spica are close together in the

first half of the month, low above the western horizon at dusk. They will form a

triangle on the 7th an hour after sunset. Saturn will be the top of the triangle,

while Mars will be on the lower right corner. Each side of the triangle is about 5

degrees. On the 14th, they will form an almost straight line: Saturn topmost with

Mars lying between Saturn and Spica.

View of the western horizon at dusk on August 7 and 14, 2012 as seen from

Manila Philippines. Images were screenshots from Stellarium.

August 12, 2012OCCULTATION OF JUPITER BY THE MOON

For Philippine observers, the waning crescent Moon will pass in front of

Jupiter and its moons during a relatively rare event called occultation on the

morning of August 12. In astronomy, an occultation occurs when one object is

hidden by another larger object that passes between it and the

observer. Prospects and timings for the event vary with location.The event takes
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place while Jupiter and the Moon are low in the sky during the were hours of the

morning.

Jupiter and its largest satellites passing behind Earths moon.

AUGUST 12-13, 2012METEOR SHOWER IN THE PHILIPPINES

Filipinos glimpsed and spotted a heavenly spectacle as the annual Perseids

meteor shower reaches its peak on August 12-13, 2012.

Philippine Atmospheric, Geophysical, and Astronomical Services Administration

(PAGASA) said August is one of the most popular times of the year to observemeteor showers. The radiant point for this shower will bE in the constellation

Perseus.

It noted that the Perseids meteor was observed with its peak in the late evening

and early morning hours from August 12-13. About 15 bright and swift-moving

meteors can be observed per hour. The meteor shower will last until August 13.

PAGASA cited that the peak of meteor shower is just one day after full moon.

They pointed out that meteors are easiest to see if there is no moonlight, light

pollution at all and if the weather permits.

The Perseids meteor shower radiates out from the constellation Perseus, which is

located in the eastern horizon during August.


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The Perseids Meteor Shower

AUGUST 14, 2012A LINE OF PLANETS ALONG WITH A THIN, WANING, CRESCENT

MOON BEFORE DAWN

Before dawn on the morning of the 14th August the planets Mercury, Venus

and Jupiter and the Moon lined up in the eastern sky. Look for a very thin

crescent Moon to the upper right of Mercury an hour before sunrise in the

northeast. Venus is to the upper right of the Moon, and a few degrees above

them is Jupiter.

AUGUST 15, 2012DEVELOPING EL Nio 2012

Atmospheric circulation in the tropical Pacific continued to be near-normalin July 2012, although a persistent warming in the tropical Pacific Ocean

trending towards an El Ni & tildeno condition have been observed since June.

Warmer sea surface temperature strengthened in the central and eastern

equatorial Pacific ocean, a typical development stage of an El Nio. Likewise,

observed warmer temperatures below the surface of the entire equatorial

Pacific Ocean is a good indicator to sustain the evolving El Ni & tildeno

condition. Dynamical and statistical model forecasts suggest the El Nio will

likely develop in August or September.

El Nio periods are usually characterized by below normal rainfall conditionacross most areas of the country during the last quarter of the year (OND) and
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early months or first quarter (Jan-Mar) of the following year. Climate pattern in

the country during the months of July and August was generally influenced by

the moderate to strong westerlies, which reflect an active Southwest (SW)

monsoon activity, generating enhanced rainfall over most areas of the country.

This characterized the seasonal variability of El Ni&tildeno impact, where the

reverse happened during the early stages of warm episode, an enhancedrainfall in any time within the months of July, August, September instead of

below normal rainfall condition.

Based on the probabilistic El Ni & tildeno Southern Oscillation (ENSO) forecast

by the National Oceanic and Atmospheric Administration (NOAA) - Climate

Prediction Center (CPC), slightly more than 70% of the ENSO forecast models

predict El Ni & tildeno condition developing around August- October season,

continuing through the rest of 2012. Initial impact of the likely developing El

Ni&tildeno during September is below normal rainfall condition in the eastern

portions of Northern and Central Luzon, including Palawan, some portions ofWestern and Central Visayas and Western Mindanao. The rest of the country will

likely experience near to above normal rainfall conditions. Increased areas

experiencing drier than normal rainfall are likely during October.

The PAGASA will continue to closely monitor these conditions and regular

updates/advisories shall be issued as appropriate.


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AUGUST 22, 2012

WAXING CRESCENT MOON JOINS SATURN, MARS AND SPICA

On the evening of the 22nd, a waxing crescent Moon, Mars, and Saturn

will all lie within a circle just 6 in diameter.

AUGUST 24, 2010NEPTUNE AT OPPOSITION

The blue planet will be at its closest approach to earth and its face will be

fully illuminated by the sm. This is the best time to view Neptune. Due to its

distance, it will only appear as a tiny blue dot in all but the most powerful

telescopes.


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AUGUST 31, 2012BLUE TO MOON LIGHTED UP FRIDAY NIGHT SKY

Blue Moon rose in the night sky on a Friday night last August 1, 2010-- the

second full moon in August and it can be seen on the entire Philippinesespecially in Metro Manila.

The Blue Moon will rise 15 minutes before sunset, according to PAG-ASA.

The second full moon in a month is called Blue Moon.

However, the National Aeronautics and Space Administration said a Blue

Moon was not literally blue in color. Most Blue Moons look pale gray and white,

indistinguishable from any other Moon youve ever seen. Squeezing a second

full Moon into a calendar month doesnt change the physical properties of the

Moon itself, so its color remains the same. With that caveat in mind, however, beaware that on rare occasions it can happen. A truly-blue Moon usually requires

a volcanic eruption. Back in 1883, for example, people saw blue moons almost

every night after the Indonesian volcano Krakatoa exploded with the force of a

100-megaton nuclear bomb. Plumes of ash rose to the very top of Earths

atmosphere, and the Moon it turned blue!

The state weather bureau Philippine Atmospheric Geophysical and

Astronomical Services Administration said the moonrise Friday would be at 5:49

p.m. and sunset at 6:09p.m.

The next Blue Moon will be on July 31, 2015.


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SEPTEMBER 1,2012THE SKY THIS MONTH

(Planets' whereabouts)

At around 1:00 AM, on September 1, Jupiter will be found at about 25

degrees above the east northeastern part of the earth. It can be seen all

throughout the world.

Time (PST) of rise and set of some planets at 10-day interval

DATEMERCURY VENUS MARS JUPITER SATURN

Rise Set Rise Set Rise Set Rise Set Rise Set

ep. 7 4:50AM

5:29PM

2:37AM

3:22PM

9:31AM

9:03PM

11:21PM

12:12PM

8:39AM

8:25PM

ep. 175:32

AM

5:57

PM

2:45

AM

3:26

PM

9:20

AM

8:47

PM

10:45

PM

11:36

AM

8:04

AM

7:49

PM

ep. 276:09

AM

6:17

PM

2:54

AM

3:29

PM

9:11

AM

8:33

PM

*10:07

PM

10:58

AM

7:30

AM

7:14

PM

SEPTEMBER 22, 2O12STARS AND CONSTELLATION

Autumnal Equinox

Philippine nights will be longer as the Sun approaches the celestial equator.

Autumnal equinox will occur on September 22 when day and night will have

equal length on Earth.

The rich band of constellations and stars along the Milky Way from the

constellations Cygnus, the Swan, in the north to Sagittarius and Scorpius in thesouth, begin to give way this month to fainter constellations, many of them with

watery associations such as the constellations of Capricornus, the Sea Goat,

Aquarius, the Water Bearer and Pisces the Fish. The famous asterism Teapot in

the constellation of Sagittarius can be observed at about 40 to 47 degrees

above the southern horizon, an hour after sunset.


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THE PLANET

At around 1:00 AM, on September 1, Jupiter will be found at about 25 degrees

above the east northeastern horizon. It will be glowing at magnitude -2.3. The

largest planet will lie among the background stars of the constellation Taurus,the Bull. Jupiter will be visible in the morning twilight throughout the month. The

visibility of the planed Jupiter will last on the entire September.

Also, at 4:00 AM, Venus will be found at about 21 degrees above the east

northeastern horizon. The brightest planet will be shining brilliantly at magnitude -

4.1. This will last until September.

On the same date at 7:00 PM, Saturn and Mars will be found at about 23 and 29

degrees above the west southwestern horizon will lie among the backgroundstars of the constellation Virgo, the Virgin and Libra, the Scale, respectively. They

will be fine targets for telescoping sessions after sunset until it will no longer be

visible in the sky for observation on the last week of the month.

Also at 8:00 PM, Uranus will be found at about 15 degrees above the eastern

horizon with the background stars of the constellation Pisces, the Fish, while

Neptune will be found at about 43 degrees above the east southeastern horizon

and will lie among the background stars of the constellation Aquarius, the

Water-Bearer. Uranus will glow at magnitude +5.7 while Neptune will be faint atmagnitude +7.8. A binocular or a telescope and a star map will be needed to

observe these icy planets. Both planets will be visible in the evening sky

throughout the month.

Mercury will start to climb up the western horizon after sunset on the middle of

the month and onward. The planet will be difficult to observe due to its proximity

to the horizon and to the Sun.

DATE EVENT TIME (LST)

7 Moon at apogee (farthest distance to Earth) 2:00 PM

8 Jupiter 0.6 north of the Moon (occn.) 7:00 PM

10 Mercury in inferior conjunction 9:00 PM

13 Venus 4 north of the Moon 1:00 AM

18 Pluto stationary 5:00 AM

18 Saturn 5 north of the Moon 10:00 PM

19 Moon at perigee (nearest distance to Earth) 11:00 AM

20 Mars 0.2 north of the Moon (occn.) 5:00 AM

22 Autumnal Equinox 11:00 PM

25 Pallas at opposition 11:00 AM

27 Neptune 6 south of the Moon 7:00 PM

29 Uranus at opposition 3:00 PM


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SEPTEMBER 22, 2012SEPTEMBER EQUINOX

September equinox occurs at 14:49 UTC. The Sun will shine directly on the

equator and there will be nearly equal amounts of day and night throughout

the world. This is also the first day of fall (autumnal equinox) in the northern

hemisphere and the first day of spring (vernal equinox) in the southern

hemisphere.

SEPTEMBER 29, 2012URANUS AT OPPOSITION

The blue-green planet will be at its closest approach to Earth and its face

will be fully illuminated by the Sun. This is the best time to view Uranus. Due to its

distance, it will only appear as a tiny blue-green dot in all but the most powerfultelescopes.


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WEATHER

AUGUST 4, 2012TYPHOON GENER

Typhoon (JMA)

Category 2 typhoon (SSHS)

Duration July 26August 4

Intensity 130 km/h (80 mph) (10-min),

960 mbar(hPa)

On July 26, 2012, various forecast models showed that the 7th typhoon to

enter Philippine Area of Responsibility (PAR) for 2012 was named as GENER. it

was reported that a tropical depression had developed within an area of strongvertical windshear in the monsoon trough about 1,000 kilometres (620 mi) to the

southeast of Manila in the Philippines. During that day the shear relaxed before

during the next day, PAGASA issued a Tropical Cyclone Formation Alert on the

system. Its intensity is 130 kph (8omph), 960 mbar (hPa).

Typhoon Gener caused widespread rains in the Philippines due to the

enhancement of the southwest monsoon. On July 29, domestic and

international flights throughout the country were delayed and cancelled. Small

fishing crafts were advised to not engage in the water as a gale warning was

issued by PAGASA. The NDRRMC alerted their agency as the storm is expected

to bring heavy rains. Seaports were also advised to cancel their trips. Flooding is

imminent as different dams are expected to reach its critical level and possibly

release huge millimeters of water.

Typhoon GENER Forecast Tracks:

Coordinates: 20.9N, 124.4E

Forecast Tracks: (1) 420 km Northeast of Basco, Batanes on Wednesday

(2) 640 km North Northwest of Basco, Batanes on Thursday
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Signal Number 3: Batanes Group of Islands

Signal Number 2: Cagayan, Calayan Group of Islands, Babuyan Group of

Islands

Signal Number 1: Isabela, Kalinga, Apayao

Movement Speed: 7kph North Northwest

Strength: 120kph

Gustiness: 150kph

Rain Volume: 10 - 20 mm/hr (Heavy to Intense)

Distance to Land: 240 km East Northeast of Basco, Batanes

AUGUST 7, 2012SOUTHWEST MONSOON

Last August 7, 2010, heavy rain brought by the annual southwest monsoon,

combined with a tropical storm to the east of the Philippines, has submerged

large parts of the capital, Manila, displacing thousands and testing a recently

launched web-based early warning system, officials and residents said.

The monsoon dumped 323 millimetres of rain on the capital and surrounding

areas in the 24 hours of 5 and 6 August - more than half of the average monthly

rainfall of 504 millimetres in August - according to the Philippine Atmospheric

Geophysical and Astronomical Services Administration, the state weather

bureau.

AUGUST 12, 2012TYPHOON HELEN

Typhoon (JMA)


Duration August 12August 18
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Last August 12, 2012, the Philippine Atmospheric, Geophysical and

Astronomical Services Administration (PAGASA) started issuing advisories on the

system, naming it Helen, as a Tropical Depression. As the time passes by, it

became a typhoon. It was the 8th typhoon typhoon that entered Philippine Area

of Responsibility (PAR) for 2012 and sighted over vicinity of Aparri, Cagayan as of

11am August 15, 2012.

It enhanced the Southwest Monsoon or Habagat and broughtrains over western section of Southern Luzon which triggered flash floods and

landslide to prone areas.

Typhoon HELEN Forecast Track


Signal No. 2: (61-100kph winds): Benguet, Nothern

Aurora, Isabela, Ifugao, Kalinga, Apayao, Ilocos Norte/Sur, Abra, Nueva

Vizcaya, Mt. Province, Quirino, Cagayan, Babuyan, Calayan Group of Islands

and Batanes Group of Islands

Signal No. 1: (45-60kph winds) : La Union, Nueva Ecija, Pangasinan, Tarlac and

rest of Aurora

Forecast Tracks:

(1) 160 km Northwest of Laoag City - Thursday

(2) 510 km Northwest of Laoag City - Friday

Movement Speed: 13kph West Northwest

Strength: 75 kph near the center

Gustiness: 90 kph

Rain Volume: 20-35 mm/hr (Intense to Torrential) within 500 km diameter

Distance to Land: over vicinity of Aparri, Cagayan

Landfall: Palanan, Isabela at 1am August 15, 2012

Intensity 120 km/h (75 mph) (10-min), 970mbar(hPa)
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AUGUST 17, 2012TYPHOON IGME

On August 17, 2012, the 9th typhoon to enter the Philippine Area of

Responsibility was named as typhoon Igme. In less than a month we are

battered by 3 typhoons and weather disturbance Habagat. Hundred people

are dead and leaving thousands of families affected with floods and

devastated agricultural crops. Some families return to their homes from

evacuation center and other low lying areas are still flooded. Despite of goodweather condition in past few days, a new LPA (now already a typhoon) is

sighted 510 km North Northeast of Basco, Batanes as of 8pm August 28, 2012.

It enhanced the Southwest Monsoon or Habagat and brought

rains over western section of Southern Luzon which triggered flash floods and

landslide to prone areas.

Typhoon IGME Forecast Track


Signal #1: (30-60 kph): None

Signal #2: (61-100 kph): None

Forecast:

(1) 645 km North Northeast of Basco, BatanesWednesday

Strength: 110 kph near center

Gustiness: 140 kph

Typhoon (JMA)




950mbar(hPa)
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Movement: North Northeast at 22 kph

Rain Volume: 10-18mm/hr (Moderate to Heavy) within 500 km

Distance to Land: 510 km North Northeast of Basco, Batanes

AUGUST 19, 2012TYPHOON JULIAN

PAGASA Tracks New Typhoon JULIAN, the 10th typhoon to enter the

Philippine Area of Responsibility (PAR) last August 19, 2012. New Typhoon with

International name BOLAVEN was sighted by PAGASA 1550 km East of Northern

Luzon as of 11 am August 19, 2012.Because of the sustained winds and strength

of the typhoon, Fujiwara Effect happened between the previous typhoon Igme.

Typhoon JULIAN Forecast Track


Forecast Track:

(1) 830 km Northeast of Basco, Batanes (Outside of PAR) - Sunday Afternoon

Strength: 175 kph

Gustiness: 210 kph

Rain Volume: 10-35mm/hr (Moderate-Heavy) within 700 km.

Typhoon (JMA)




910mbar(hPa)
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Movement: Northwest at 15kph

Distance from Land: 850 km Northeast of Basco, Batanes as of 4am August 26,

2012

What is Fujiwhara Effect?

There are two typhoons inside Philippine Area of Responsibility as of today,

Typhoon JULIAN and IGME and a possible interaction will take effect as they

approach at distance of 1500 km between each other. This interaction is called

"Fujiwhara Effect" discovered by Sakuhei Fujiwhara - a Japanese Meteorologist

in 1921 Aand he determined that two storms will sometimes move around a

common center pivot point.

The interaction will rotate in a common center pivot point. One scenario of

Fujiwhara Effect is Typhoon IGME will make a u-turn while Typhoon JULIAN is

traversing Taiwan-Okinawa and the two will dance to each other or act like a

seesaw.

The Fujiwara Effect is an interesting phenomenon which can happen when two

or more hurricanes form very near each other. The National Weather Service

defines the Fujiwhara Effect as the tendency of two nearby tropical cyclones to

rotate cyclonically about each other. Another slightly more technical definitionof the Fujiwhara Effect from the National Weather Service is a binary interaction

where tropical cyclones within a certain distance (300-750 nautical miles

depending on the sizes of the cyclones) of each other begin to rotate about a

common midpoint. The effect is also known as the Fujiwara Effect without an h

in the name.

Fujiwharas studies indicate storms will rotate around a common center of mass.

A similar effect is seen in the rotation of the Earth and moon. This barycenter is

the center pivot point around which two rotating bodies in space will spin. The

specific location of this center of gravity is determined by the relative intensity of

the tropical storms. This interaction will sometimes lead to tropical storms

'dancing' with each other around the dance floor of the ocean.


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SEPTEMBER 10, 2012TYPHOON KAREN

PAGASA active Low Pressure Area (LPA), now a typhoon KAREN was sighted

660 km East of Itbayat, Batanes as of 10 am September 15, 2012 and the 11th

Typhoon that entered Philippine Area of Responsibility (PAR) this 2012.

KAREN, previously an active LPA was embedded along Inter-Tropical

Convergence Zone (ITCZ) affecting Southern Luzon, Visayas and Mindanao

which will experience cloudy skies with scattered rain showers and thunderstorm

which may trigger flash floods and landslides.

KAREN is expected to enhanced Southwest Monsoon or HABAGAT that will

bring rains over Luzon and Western Visayas. Fishing boats and small seacrafts are

advised not to venture out into the Eastern Seaboard of Central and Southern

Luzon.

PAGASA Typhoon KAREN Forecast Track


Signal #1: None

Typhoon (JMA)

Category 5 super typhoon (SSHS)

Duration September 10September 18


900mbar(hPa)
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Forecast Track:

(1) 70 km South of Okinawa JapanSunday

Strength: 185 kph near center

Gustiness: 220 kph

Movement Speed: North Northwest at 15 kph

Rain Volume: 15 - 30mm/hr (Heavy to Intense Rains) within 550 km.

Distance from Land: 660 km East of Itbayat, Batanes

SEPTEMBER 29, 2012TYPHOON LAWIN

Satellite image Storm track

Current storm status

Typhoon(JMA)

Current storm status

Category 2 typhoon (1-min mean)

As of: 08:45UTCSeptember 29

Location: 27.3N129.0E

Winds: 90 knots (165 km/h; 105 mph)

sustained (10-min mean)

90 knots (165 km/h; 105 mph)

sustained (1-min mean)gusting to 130 knots (240 km/h;

150 mph)

Pressure: 935hPa(27.61inHg)

Movement: NEat 15 knots (28 km/h; 17 mph)
http://en.wikipedia.org/wiki/Tropical_cyclone#Intensity_classificationshttp://en.wikipedia.org/wiki/Tropical_cyclone#Intensity_classificationshttp://en.wikipedia.org/wiki/Japan_Meteorological_Agencyhttp://en.wikipedia.org/wiki/Japan_Meteorological_Agencyhttp://en.wikipedia.org/wiki/Japan_Meteorological_Agencyhttp://en.wikipedia.org/wiki/Saffir-Simpson_Hurricane_Scalehttp://en.wikipedia.org/wiki/Saffir-Simpson_Hurricane_Scalehttp://en.wikipedia.org/wiki/Saffir-Simpson_Hurricane_Scalehttp://en.wikipedia.org/wiki/Coordinated_Universal_Timehttp://en.wikipedia.org/wiki/Coordinated_Universal_Timehttp://en.wikipedia.org/wiki/Coordinated_Universal_Timehttp://en.wikipedia.org/wiki/Latitudehttp://en.wikipedia.org/wiki/Longitudehttp://en.wikipedia.org/wiki/Longitudehttp://en.wikipedia.org/wiki/Longitudehttp://en.wikipedia.org/wiki/Pascal_(unit)http://en.wikipedia.org/wiki/Pascal_(unit)http://en.wikipedia.org/wiki/Pascal_(unit)http://en.wikipedia.org/wiki/Inch_of_mercuryhttp://en.wikipedia.org/wiki/Inch_of_mercuryhttp://en.wikipedia.org/wiki/Inch_of_mercuryhttp://en.wikipedia.org/wiki/Northeasthttp://en.wikipedia.org/wiki/Northeasthttp://en.wikipedia.org/wiki/File:Jelawat_2012_track.pnghttp://en.wikipedia.org/wiki/File:Jelawat_Sept_29_2012_0450Z.jpghttp://en.wikipedia.org/wiki/File:Jelawat_2012_track.pnghttp://en.wikipedia.org/wiki/File:Jelawat_Sept_29_2012_0450Z.jpghttp://en.wikipedia.org/wiki/Northeasthttp://en.wikipedia.org/wiki/Inch_of_mercuryhttp://en.wikipedia.org/wiki/Pascal_(unit)http://en.wikipedia.org/wiki/Longitudehttp://en.wikipedia.org/wiki/Latitudehttp://en.wikipedia.org/wiki/Coordinated_Universal_Timehttp://en.wikipedia.org/wiki/Saffir-Simpson_Hurricane_Scalehttp://en.wikipedia.org/wiki/Japan_Meteorological_Agencyhttp://en.wikipedia.org/wiki/Tropical_cyclone#Intensity_classifications


19/19

PAGASA Tracks New Typhoon named Lawin, the 11th typhoon to enter

the Philippine Area of Responsibility (PAR) last September 29, 2012.

PAGASA sighted LAWIN 480 km Northeast of Itbayat, Batanes 10pm September 28,

2012, the 12th typhoon to enter the Philippine Area of Responsibility (PAR) for this

year.

LAWIN was previously an active LPA and developed into Tropical Depression

(PAGASA technical term) 8 days ago.

A total of four typhoons visited our country last year for the month of September

alone. In September 24, 2011 and 2009, typhoon PEDRING and Ondoy make a

landfall in our country and there is similarity in typhoon tracks.

PAGASA Typhoon LAWIN Forecast Track

Coordinates: 24..5N, 125.2E

Signal #3 (101-185kph winds): None



Forecast Track:

(1)Out of Philippine Area of Responsibility (PAR)SaturdayStrength: 175 kph near the center

Gustiness: 210 kph

Movement: Northeast at 17 kph

Rain Volume: 10-20mm/hr (Heavy to Intense) within 750km

Distance to Land: 480 km Northeast of Itbayat, Batanes

astronomical events 2012

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