#2004 bl86

Huge Asteroid Expected To Pass Near Earth

The asteroid will not be visible to the naked eye, but can be seen with a small telescope or strong binoculars.

View this image ›

neo.jpl.nasa.gov

A massive asteroid the size of five football fields is expected to pass safely near Earth.

According to NASA, the asteroid, designated 2004 BL86, will pass about three times the distance of…

El asteroide que “rozó” la Tierra tiene su propia luna

El asteroide de 325 metros de diámetro pasó el 26 de Enero a una distancia de tres veces la existente entre la Tierra y la Luna, vino acompañado de un satélite de 70 metros.

  El asteroide del tamaño de una montaña que acaba de pasar al ras de la Tierra traía una mini luna propia, informó la NASA al divulgar sus primeras imágenes de radar de la roca estelar.

El asteroide conocido como 2004 BL86…

The asteroid that zinged past us yesterday has a moon!

Scientists working with NASA's 230-foot-wide (70-meter) Deep Space Network antenna at Goldstone, California, have released the first radar images of asteroid 2004 BL86. (These are also the folks responsible for the New Horizons mission to Pluto, which arrives soon!) The resolution on the radar images is 13 feet (4 meters) per pixel. It made its closest approach yesterday (January 26, 2015, 10:19 am Central time) just 745,000 miles (1.2 million kilometers) from us, about 3.1 times the distance as far away as the Moon.

Best part? The images reveal that asteroid 2004 BL86 has its own small moon.

The asteroid is approximately 1,100 feet (325 meters) across and has a small moon approximately 230 feet (70 meters) across. In the near-Earth-object (NEO) population, about 16 percent of asteroids larger than 650 feet (200 meters) or larger have one - or even two! - small moons orbiting them.

The trajectory of the asteroid is well understood. Monday's flyby was the closest approach the asteroid will make to Earth for at least the next two centuries. It is also the closest a known asteroid this size will come to Earth until asteroid 1999 AN10 flies past our planet in 2027.

Asteroid 2004 BL86 was discovered on Jan. 30, 2004, by the Lincoln Near-Earth Asteroid Research (LINEAR) survey in White Sands, New Mexico.

NASA places a high priority on tracking asteroids and protecting our home planet from them, the most robust and productive survey and detection program for discovering NEOs in the world. NASA partners with government agencies, university-based astronomers, space science institutes across the country, and amateur astronomers, plus international space agencies and institutions working to track and better understand these objects. (I helped with the NEO search, too, back in the mid-1990s, as part of the Hobbs Observatory mission. That was frakkin' cool, except the part where I had to use an Apple II to run the telescope.)

De radaropname van 2004 BL86 plus z’n maantje. Als je op de afbeelding klikt start een korte animatie.

Gisteren is de 325 meter grote planetoïde 2004 BL86 op 1,2 miljoen kilometer afstand langs de aarde gescheerd. Uit radaropnames, die zijn gemaakt door de 70-meter Goldstone-antenne van NASA’s Deep Space Network, blijkt dat de ruimterots een maantje heeft! Het maantje meet zo’n 70 meter en z’n ontdekking is niet geheel uitzonderlijk: van alle zogenaamde aardscheerders blijkt zo’n zestien procent in het bezit te zijn van één of zelfs meerdere maantje(s) – vermoedelijk zijn ze het gevolg van botsingen met andere kleine hemellichamen in de jeugd van het zonnestelsel. De resolutie van de radaropnames is zo’n vier meter per pixel. Voorlopig zal een planetoïde van dergelijke grootte niet meer op bezoek komen – althans, voor zover wij weten. De eersvolgende keer dat een (aan de wetenschap bekende) ruimterots van enig formaat voorbij komt vliegen zal pas in 2027 zijn.

Bron: Astronomie.nl

Pokraj Zemlje proletio asteroid koji ima svoj vlastiti mjesec

Izvor: NASA JPL

Asteroid koji je u ponedjeljak proletio pokraj Zemlje ima mali mjesec, a prišao nam je najbliže što će jedno nebesko tijelo prići sve do 2027. godine.

U ponedjeljak je pokraj Zemlje prošao asteroid 2004 BL86, s najmanjom udaljenošću od Zemlje od oko 1,2 milijuna kilometara. Riječ je o udaljenosti tri puta većoj nego što je ona između Zemlje i Mjeseca. A kako se pokazalo, asteroid…

Imagens da NASA mostram que Asteroide 2004 BL86 possui sua própria Lua

O Imenso asteroide que raspou a Terra nesta ultima segunda-feira (26 de janeiro) tem a sua própria lua, revelada por novas imagens de radar do objeto.

O Asteroid 2004 BL86 passou a 745.000 milhas (1,2 milhões de quilômetros) da Terra na segunda de manhã – cerca de 3 vezes a distância entre o nosso planeta e da lua. E a rocha espacial não estava sozinha: Um companheiro é claramente visível em um…

On January 26/27, the asteroid 2004 BL86 will sweep past the Earth at a distance of 1.2 million kilometers, three times the distance of the moon. Closer asteroid approaches are common, but this one is gaining attention because of the size and brightness of the object involved. The website Lunar Meteorite Hunters lists 41 close asteroid approaches in […]