wiki says about 1998 OR2Does anyone know what the official close distance the asteroid that will pass close on 29th April will be?
On 29 April 2020 at 09:56 UTC the asteroid will safely pass 0.042 AU (6.3 million km; 16 LD) from Earth. With observations as recent as April 2020 and a 32 year observation arc, the 2020 close approach distance is known with an accuracy of roughly ± 7 km. (For comparison Venus will be 0.29 AU (43 million km; 110 LD) from Earth on 3 June 2020.)
Thank you Mariana. I made an error... I fell for a fake news video where they were saying how close the asteroid will pass but it was a different asteroid all together that approached the planet in 2012.It's okay to make mistakes, SOTTREADER. Perhaps next time you could make clear to which post you were referring and just say you made a mistake?
Astronomy Picture Of the Day: The Ion Tail of New Comet SWAN (2020 Apr 29)
Image Credit & Copyright: Gerald Rhemann
Explanation: Newly discovered Comet SWAN has already developed an impressive tail. The comet came in from the outer Solar System and has just passed inside the orbit of the Earth. Officially designated C/2020 F8 (SWAN), this
outgassing interplanetary icebergwill pass its closest to the Earth on May 13, and closest to the Sun on May 27. The comet was first noticed in late March by an astronomy enthusiast looking through images taken by NASA's Sun-orbiting SOHO spacecraft, and is named for this spacecraft's Solar Wind Anisotropies (SWAN) camera. The featured image, taken from the dark skies in Namibia in mid-April, captured Comet SWAN's green-glowing coma and unexpectedly long, detailed, and blue ion-tail. Although the brightness of comets are notoriously hard to predict, some models have Comet SWAN becoming bright enough to see with the unaided eye during June.
I'm sorry, just saw your message right now. I don't have an answer for you question, but maybe you can find answer in Vulcan59 post about skylive website, where you can adjust your location and look what is there in the sky.I Karo, do you know if it will pass in the northern hémisphère ? I have Orion in south just up in front of me in winter...
Thank you Karo, no problem for the timing !! In french we say «Mieux vaut tard que jamais» it means «better late than never» I will check the Vulcan59 postI'm sorry, just saw your message right now. I don't have an answer for you question, but maybe you can find answer in Vulcan59 post about skylive website, where you can adjust your location and look what is there in the sky.
Why Comet Swan will be tricky to see
Nor is the northern hemisphere about to get a great view of a bright comet. It’s not impossible that Comet Swan will prove an impressive night sky object, though photos of Comet Swan—officially designated C/2020 F8 (SWAN)—have so far been spectacular, but slightly misleading.
Comet Swan this week becomes visible from northern latitudes as its passes through the constellation of Pisces, but only in pre-dawn twilight skies currently lit-up by a bright moon, so the skies may be too bright to afford a good, clear, impressive view.
Is Comet Swan bright enough to see with the naked eye?
Comet Swan is currently 85,046,715 km away from Earth and just visible to the naked eye (though easier in binoculars) at a visual magnitude of 5.4.
It has been suggested that Comet Swan might reach a magnitude of 3, but hopes of that are fading.
“It is true that estimates are being affected by bright skies—twilight and the Moon—but earlier predictions of magnitude 3 or brighter are now looking optimistic,” says Nick James, Director of the Comet Section at the British Astronomical Association. As well as being relatively close to the Sun (so slightly lost in the Sun’s glare, and thus not visible in a truly dark sky), Comet Swan appears to have stopped brightening despite it getting closer to the Sun, which basically means that’s it now fading. “I think we'll be lucky if it gets to 4, but who knows?” says James. “It could flare up again so it will be worth observing.”
Will Comet Swan be a spectacular sight?
Worth observing, yes, but for the average stargazer looking for something spectacular? “I doubt if it will be much for the general public,” says James. “All the really spectacular images were taken when the comet was in outburst and in dark skies—they are the ones used in press articles, and they are very misleading.” The BAA keeps its own visual analysis page.
“We won't have anything like that,” says James. So it seems like the best images of Comet Swan and its green-glowing coma may already have been taken as it graced dark night skies of the southern hemisphere.
All hope is not lost … yet
However, it should be possible to observe Comet Swan from anywhere in the northern hemisphere from mid-May, when it should be an easy binocular object, if not a naked-eye object. It could even put on a surprise and become easily bright enough to see naked-eye. “Comets can do unusual things when they get close to the Sun,” says James. “We won’t really know how it performs until we actually see it go through perihelion—it could surprise us.”
What and when is perihelion?
Perihelion means closest to the Sun; it’s the point in the orbit of a comet when it’s closest to the Sun. Perihelion for Comet Swan is on May 26, but it looks set to be at its brightest a week or so before that.