has dimmed with no sign of nucleus. Compare 11/29: to 11/30 upper right smudge
This was the view posted late last night: .
Here's an orbit diagram of 433 Eros showing its position now. You can animate it with the "play" buttons under the diagram.
It's not clear yet. A dust tail emerged and only now appears to be brightening. It'll require more watching.
Happens all the time. Several times a year Earth goes through debris fields of comets. No danger involved.
Comet 's fiery swing around the sun. It's not yet clear whether any portion of the nucleus has survive...
It's picking up tremendous speed. At closest point to the sun it will be traveling over 800,000 mph.
Live now. 's Google Hangout on Comet 's progress today can also be viewed here: VIDEO
Watch now our Google+ Hangout. Find out if the survives its journey around the sun:
A closer view of Comet as it nears the sun, from SOHO's LASCO C2. The big question is, will sur...
Stunning view of comet as it closes in on the sun for a close pass at 1:38pm ET. Data from SOHO LASCO...
Comet (lower right) is brightening as it nears the sun (center disk) 12 hrs before perihelion (closes...
You can create your own movie from SOHO data here: . Select "LASCO C3" & latest 100 images.
Yes, there was a CME. The sun isn't making it easy for
If it survives the trip around the sun, it should brighten and become visible in about a week (once it's out of sun's glare).
will pass very close to the sun, ~ 700,000 miles (1.1 million km) Nov. 28. Why ISON interests us: VIDEO
latest images show the comet (lower right) approaching the sun (center disk) as seen by the SO...
Yes. Primarily because it was coming from the direction of the sun, a blind spot for Earth-based telescopes.
2/2 If it survives passing near the sun it should become visible to all of us in about one week when out of sun's glare.
The best way to see Comet this week is online via imagery sent back from spacecraft that are studying it.
If you mean 2013 TV135, it was completely eliminated as having any risk. Additional observations helped pinpoint its orbit.
2/2 If it survives passing near the sun it should become visible to us again in about one week when out of sun's glare.
The best (and perhaps only) way to see it on Thursday will be online via imagery from spacecraft. We'll post some links.
If it survives going around the sun and brightens, yes, it would be visible from the Philippines.
Listen live as scientists discuss the latest on comet & its trip around the sun. 10a PT/1pm ET/1800 UTC
Ah, yes, it's a shame if it is disintegrating now. Not completely unexpected, however.
Reports on which object are scaring you? Ison shouldn't; it doesn't come near Earth.
Comet : Will it sizzle or fizzle, become dazzle or dust when it passes the sun Nov 28? VIDEO
2013 NJ is about 150 meters/490 feet across. Full list of passes by Earth for next 100+ yrs here:
No known threats but we do track close approaches to moon & other planets. Ex: 2013 NJ list here:
Asteroid 2013 NJ will safely pass Earth Nov. 25 7:09pm PST (0309 Nov. 26 UTC) by 589,000mi/948,000km or about 2.5 lunar distances.
Do you mean comet ISON? It is on the southeast horizon minutes before sunrise. It is very close to the sun now.
You can barely spot just above the E horizon before sunrise, so try to see it now. On Nov 28 it swings around the sun.
.'s is answering your questions for the next hour at
Got Qs? Ask 's today Nov 21 1230pm PT (2030 UTC) in live Q & A session:
No more asteroids than usual. If you mean meteors, yes we do see more when Earth passes through debris streams, aka meteor showers
It passed by at 2135 UTC/4:35pm EST/1:35pm PST
It's approximately 40 meters. Size is estimated from the albedo or brightness of the object.
No, being only about 40 meters across it is not naked-eye visible from that distance.
Our discovery program continually improves, so you may hear of more. Discovery stats since 1995 are here:
Small asteroid 2001 AV43 will safely pass Earth at 4:35pm EST/2135UTC. Distance: 706,000mi/1,140,000km or about 3 LD (lunar distance).
Excitement over comet ISON increases as it becomes brighter in pre-dawn sky. maintains this ISON blog
Look before dawn. The link had some sky charts. It is just barely naked-eye visible, binoculars should help too.
For those in So Hemi, look for comet ISON before dawn in low east horizon this month. Info/skymap:
Finally! Comet ISON is brightening as it nears the sun. In northern hemi, look for it in SE sky before dawn. More:
This interactive "comet tracker" from uses data from the team. Find ISON & more:
Small meteors enter atmosphere every day somewhere on Earth. You can find a log of 2013 sightings here:
We typically respond to questions about fireballs (they happen every day) but no one asked us about the So Cal one.
Small meteors enter atmosphere every day. You can review eyewitness logs: . 2868 events to date
How large was the object that caused a nice fireball over So Calif last night? Scientists estimate it was the size of a beach ball.
Yes, it's true. We issued this news via Twitter yesterday.
Nothing unusual about the fireball over L.A. They are quite common and an impressive sight
Just another fireball caused by a small rock. These events happen every day. See:
Asteroid 2013 TV135 update: With additonal observations/updated orbit calculations, the object has been downgraded to 0 on Torino Scale.
Study: Data from the Chelyabinsk meteor impact revolutionized scientists' understanding of these events:
In all likelihood it will miss. Orbit is still being calculated w/ new observations. This is a normal step & takes some time.
Yes. Studies on mitigation & deflection techniques are on-going. Read more here
Don't be worried. Orbit of that asteroid is still being calculated with observation data. This is normal, takes time.
All of our asteroid info goes to the Web (and here). You can rely on us for accurate info on all known asteroids.
Small asteroid 2013 UV3 will safely pass Earth Oct. 29. Distance: 176,000 mi/283,000 km or .7 lunar distance. Size: ~15 meters
That's not unusual while the orbit is recalculated w/ new obs. Apophis did same. It goes up & down for a time.
2/2 Fairly typical that new discoveries are added, then removed from risk page. See as example.
It's starting to increase again & the asteroid is still classified a "1" i.e., routine discovery; no unusual level of danger.
Threats from for 2029 & 2036 were ruled out after additional obs data was obtained in 2012.
Most likely scenario is w/ more obs we'll pinpoint the orbit of the asteroid & risk will go to zero. This is not an unusual step.
Comets leave copious amounts of dust & particles. Earth passes thru these trails frequently. More at:
What came down over Russia was a small asteroid (19 meters dia). Right now, Earth is going thru trail left by comet Halley.
Earth passes thru debris trails of comets all the time, no danger in that. If we're lucky, we'll get "shooting stars" from it.
Saying chance is likely to go to zero once we get some additional obs to calculate the orbit.
That .002 will reduce dramatically, likely to zero, once we have additional obs to pinpoint the orbit. It's fairly routine.
That calc is based on very little data. As we get more observations, we recalculate. It's very common to see risk chg to zero.
That's another internet hoax. There is no danger. None. Zero.
ISON has a 100 percent chance of missing Earth. There's no concern, no danger. It may be pretty to see however.
Add'l observations of 2013 TV135 will allow for improved orbit calcs - likely to reduce or eliminate any risk.
Seeing scary headlines about asteroid 2013 TV135? The reality: Early observations show it has 99.998% chance of missing Earth in 2032.
Full list of NEOs thru Jan here: Nothing remarkable in Dec. We have 1 in Oct & 2 in Nov coming w/in 3 LD.
Until we get those additional obs, we place it on the watch list & remove it later. This happens fairly frequently
The asteroid exists, but it's mostly media hype. New finds often need more observations to improve orbital prediction.
4 asteroids are safely passing thru the neighborhood today at great distances--5 million to 18 million miles away (8 to 28 mil km)
During the shutdown aired a segment on asteroid detection w/ our team members. Watch here:
[Tap tap] Is this thing on? Hey, it's great to be back! We're looking forward to sharing the news on near-Earth asteroids & comets.
Due to the gov't shutdown, all public NASA activities/events are cancelled or postponed until further notice. Sorry for the inconvenience.
To clarify: Many observatories, astronomers are watching the skies. Updated list of Near-Earth objects at
In the event of government shutdown, we will not be posting or responding from this account. We sincerely hope to resume tweets soon.
Magnitude 27.4, from which we estimate the size to be approx 11 meters
Two fireball events in the past 2 days over the midwest U.S. Pics and info at
If any of the astronomers track it for pics or video, I'll send a link.
It's much too small to see with the naked eye. Sizable scope would be required.
No, it's much too small to see without a sizable telescope.
@ These objects are extremely small to be seen at that distance. Sizable scopes are required.
Small asteroid 2013 SK20 will safely pass Earth tonight. Distance: 542,000 mi/872,000 km or about 2.3 lunar distances. Size: ~11 meters
If you mean Apophis, recent radar obs of the asteroid have helped us rule out an impact in 2036.
Congrats! Fireballs are an amazing sight. Makes you appreciate our atmosphere, too.
Fireballs always occur frequently (every day). In past 3 yrs, we have encouraged people thru social media to report them.
1 yr ago today was discovered. More on the comet that may dazzle (or fizzle) in coming months:
If that were to occur, astronomers and observatories world-wide (including NASA) would issue information.
You can find pics and more info on here: & here:
2 flybys, 8 years and half-a-million images later, 's Deep Impact mission has concluded.
It's the latter. Comet cannot change course.
That size would disintegrate in the atmosphere and cause no ground damage.