Saturday, March 5, 2016

Uncertainties surrounding Asteroid near-Earth flyby March 7 or 8 or 9 and why

There have been conflicting reports and agitated internet chatter about near-Earth Asteroid TX68 passing by Earth on March 7 (but time uncertainty is still 2 days). Now scientists are saying it could brush by Earth at a distance close enough to threaten orbiting satellites!

Uncertainty Surrounds Asteroid Near-Earth Flyby Next Week

A decent-size asteroid will zoom past Earth next week, but astronomers aren't sure exactly when the flyby will happen, or just how close the space rock is going to get.




The latest observations suggest that the 100-foot-wide (30 meters) near-Earth asteroid 2013 TX68 will come within about 3 million miles (5 million kilometers) of Earth's surface on March 8, NASA researchers said. But it's also possible that the space rock will get much, much closer — 15,000 miles (24,000 km) or so, which is inside the planet's ring of geostationary satellites.

2013 TX68 was discovered in October 2013 by astronomers working with the Catalina Sky Survey in Arizona. The asteroid orbits the sun every 780 days or so; two years ago, 2013 TX68 flew by Earth at a distance of 1.3 million miles (2 million km).

However, observations of the asteroid remain limited, which explains the uncertainty associated with its orbit.

2013 TX68 isn't particularly big as far as space rocks go, and it wouldn't do serious, widespread damage if it did hit Earth. (Most researchers think asteroids must be at least 0.6 miles, or 1 km, wide to cause problems for humanity on a global scale.)

But a collision between 2013 TX68 and Earth would be dramatic: The asteroid would probably explode above Earth's surface in an airburst twice as powerful as the 2013 Chelyabinsk event, which damaged buildings and injured more than 1,200 people in the Russian city of Chelyabinsk, NASA officials said.

Scientists think the Chelyabinsk airburst was caused by a near-Earth object about 65 feet (20 m) wide. - Full story on Space.com

No need to panic: 100ft asteroid predicted for close brush with Earth

Scientists are urging people not to panic after learning a 100ft-wide asteroid could be about to brush by the Earth at a distance close enough to threaten orbiting satellites.


The space rock, named 2013 TX68, is expected to make its nearest approach to Earth early this month.

But the precise timing of its visit and trajectory will not be known until after the event.

The asteroid could shoot past the Earth inside the ring of communications and GPS satellites located in fixed positions 36,000km miles above the equator, say experts.

At the other limit of its predicted path range it could remain as far out as 40 times the distance to the moon.

US scientist Sean Marshall, from Cornell University in New York, who studies near-Earth objects (NEOs) such as comets and asteroids said: "Should this asteroid come closer than the geostationary satellites, it would be a rare occurrence - that only happens about once per decade for large asteroids. What we know for sure is that it will not collide with Earth this month, so do not panic."

He added: "The large uncertainty in TX68's orbit makes it difficult to plan observations in advance, but hopefully it will be seen by some of the automated asteroid survey telescopes.

"However, it is possible that TX68 will be so far from Earth that it will be too faint to be seen. If TX68 is detected this month, that would greatly reduce the uncertainty in its orbit and allow astronomers to calculate its future trajectory much more accurately."

Geostationary satellites are further away than the International Space Station, which orbits at 400km above Earth. - Independent

From EarthSky:
Uncertainties, still, for asteroid 2013 TX68

Asteroid 2013 TX68 passes closest in early March. Astronomers know it will pass safely, but its precise distance at its closest still is unknown.

Expected position in the sky of asteroid 2013 TX68 as of March 1, 2016, about 30 minutes after sunset. The space rock will be difficult to observe even with telescopes, especially if the asteroid passes at a great distance. At present, its distance at closest approach is not known. Illustration by Eddie Irizarry using Stellarium.
Asteroid 2013 TX68 may pass by Earth around the evening of March 7 (according to clocks in the Eastern Time zone), but the time uncertainty is still 2 days. That means the space rock may be passing by our planet sometime between the evenings of March 5 and 9. The asteroid is travelling at a speed of 34,279 miles per hour (55,166 km/h).

Why is there so much uncertainty about this object?

It’s the scenario that astronomers have always cautioned us about … the fact that asteroid 2013 TX68 is approaching Earth from the sun’s direction. In late February, the space rock was still approaching Earth from this direction, although the asteroid was actually at a greater distance from us than our star. In other words, it has been in the daytime sky, and astronomers can’t observe it.

The uncertainty of the exact date of closest approach as well as the precise orbit, is due to the fact that asteroid 2013 TX68 was just observed during 10 days (including the newly found pre-discovery images). That is still a short time to define an orbit precisely. After it was observed and tracked for those few days in 2013, the asteroid passed into Earth’s daytime sky and could no longer be observed.

Susong Dalaga Hill

Susong Dalaga Hill
Susong Dalaga Hill from Bagtasan isthmus

Date and Time

Blog Archive

Total Pageviews

Popular Posts

Blog Log

Followers

Networked Blogs

Space Weather

Space Weather
What's up in space

Categories

ACCOMMODATION Adeline Angeles ADVENTURE SERIES ALAIN MADRIGAL ALLAN VELASCO AMOINGON ARAW NG MARINDUQUE ARCHAEOLOGY Argao AWARENESS BAGTINGON Bahaghari BANTAY-KASO Barrick Gold BATTLE OF MASAGUISI BATTLE OF MORIONS BATTLE OF PAYE BATTLE OF PULANG LUPA BELLAROCCA ISLAND Bishop Marcelino Antonio Maralit Jr Bishop Reynaldo Evangelista BOAC BOAC CATHEDRAL BUENAVISTA BULONG Bunganay BUTTERFLY CAPITOL BUILDING CAPITOL CHOIR Cardinal Ricardo Vidal CARMENCITA REYES CAWIT PORT CBCP CEMETERIO DE TAMPUS CENSORSHIP CHANGE CINEMALAYA CLIMATE CHANGE COA Report COLONIAL HOUSES Conflict CONG. LORD ALLAN VELASCO CORRUPTION CORY AQUINO Curt Shepard DISASTER DONA PAZ DPWH DR. ANTONIO UY DTI DUTERTE EARTHQUAKE ECO-TOURISM EDSA Elections 2010 Elections 2013 Elections 2016 ELI OBLIGACION ENVIRONMENT EVENTS EXTREME MARINDUQUE FEATURED SITES GASAN GASANG-GASANG FESTIVAL GASPAR ISLAND GOV. BONG CARRION Guisian HEALTH HERMENEGILDO FLORES Hinanggayon HINULUGAN FALLS HOBIE HOLY WEEK JOSE F. ALVAREZ JOSEPH EMIL BIGGEL Joseph Laban JR LABRADOR Kalesayahan KALUTANG KURAY LAYLAY LETTER TO GOVERNOR LONGHINO Lorna-Quinto Velasco LUBANG FAULT LUZON DATUM OF 1911 Mabusay Falls MACEC MALINDIG Maniwaya Marcopper MARELCO MARINDUQUE AIRPORT MARINDUQUE AKIN KA MARINDUQUE CULTURE MARINDUQUE ELECTIONS 2013 MARINDUQUE FIRST SATURDAY MOVERS MARINDUQUE HISTORY MARINDUQUE HISTORY CONFERENCE MARINDUQUE INFRA PROJECTS Marinduque Politics MARINDUQUE STATE COLLEGE MARINDUQUE TOURISM MARINDUQUE VIDEO MARTIN LARDIZABAL MAXIMO ABAD MIMAROPA MOGPOG MORIONES 2009 MORIONES FESTIVAL Moriones Festival '10 Moriones Festival '12 MORIONES FESTIVAL 08 MORIONES FESTIVAL 09 MORYONAN MSC SAMBAYANG SINING LAHI MUTYA NG MARINDUQUE Myke Magalang NCCA NORWEGIAN MISSION ALLIANCE PASTORES PASYONDULA PASSION PLAY Paye PEOPLE PERCIVAL MORALES PH HISTORY PHILIPPINE ARTS FESTIVAL Places PNP Poctoy Beach Pope Francis Pork Barrel POWER OUTAGE Pres. Benigno S. Aquino PRESIDENT DUTERTE PRRM PUTONG RAMON MADRIGAL Raymond Go ROBERTO MADLA Romulo Bacorro Russel Madrigal SAKAMAR SAN ISIDRO CAVE Sangguniang Panlalawigan Sawi Sayao Bay SCUBA DIVING SEA TRAVEL SCHEDULES SEAIR SENEN LIVELO Silangan South China Sea SPACE STA. CRUZ STATE OF THE PROVINCE ADDRESS STTC ASSEMBLY Susong Dalaga Hill TARUG CAVE TEATRO BALANGAW TEOFILO N. ROQUE TON MONTEAGUDO TORRIJOS TOTO NEPOMUCENO Treasure Hunt TRES REYES ISLANDS TRIVIA Tumagabok Falls TYPHOON "FRANK" TYPHOON "ONDOY" Typhoon NinaPH VERDE ISLAND PASSAGE Vicky Lao-Lim VIVA MARINDUQUE 2008 VIVA MARINDUQUE 2009 VIVA MARINDUQUE REPORT WALANG SUGAT WEEKLY MARINDUQUE WEN VELASCO WORLD WW2 WW3 YESHUA YOOK

Quick news, photos, videos, culture, tourism, history and all that there is on the island of Marinduque, Philippines. "VIVA MARINDUQUE!" www.marinduquegov.blogspot.com

Marinduque Rising | www.marinduquegov.blogspot.com | (c) 2007. Powered by Blogger.