At a glance
- Width
- 86 to 193 m
- about 699 bananas
- Speed
- 8.72 km/s
- 31,401 km/h · 19,512 mph
- Misses us by
- 34.1 lunar
- 13,132,347 km · 8,160,060 miles
- First spotted by us
- 13th November 2026
- 2 page views
How far is "close"?
Same gap, ranked against places you have heard of, on a log scale because the Sun is awkwardly far away.
How big is it, really?
NASA only estimates the width, so we show the biggest guess. Log scale again. Everest is just there to make everything else look reasonable.
How fast is it going?
Speed relative to Earth at closest approach. The International Space Station is the fastest thing most of us will ever stand under. This lot would lap it.
If it hit (it will not)
Rough impact energy at the biggest size estimate, assuming solid rock, in tonnes, kilotons and megatons of TNT, which is how everyone who has to do this maths measures it. Treat it as a ballpark. The point stands: no impact is scheduled.
Where it actually lives
A top-down view of the orbit, to scale, with Earth's and Mars's orbits for company. The tilt of the orbit is ignored, so treat the shape as right and the exact position as roughly right. The Sun is the orange dot in the middle.
- Orbit class
- ATEAten: crosses Earth's orbit while spending most of its time inside it, between us and the Sun.
- Year length
- 0.65 Earth years (237 days)One lap of the Sun. Your commute is shorter, and so is your patience.
- Eccentricity
- 0.434How squashed the orbit is. 0 is a perfect circle, 1 is "leaving". Noticeably oval. Mildly dramatic.
- Tilt
- 3.1°The angle of its orbit against the flat plane the planets share. Basically flat, so it shares our neighbourhood.
- Closest to the Sun
- 0.42 AU63 million km. One AU is the distance from Earth to the Sun.
- Furthest from the Sun
- 1.07 AU161 million km. Never leaves the inner solar system.
- Closest orbit-to-orbit gap
- 0.025 AUIf you only compare the two orbits, not where the planets are, they come within 10 lunar distances. The rock is rarely there at the same time as us, which is the entire reason we are still here.
- Observations used
- 152NASA has measured this one 152 times. It has been stalked thoroughly.
- Watched for
- 13.0 years2004-12-10 to 2017-12-20. Long enough to know it well.
- Orbit uncertainty
- 0 out of 90 means we know exactly where it is going. 9 means a shrug. Lower is better.
Is it actually hazardous?
This one fails at least one test, so it is not on the list. It is comfortably, boringly harmless.
Not on NASA's Sentry impact-risk watch list. No further action, no thoughts, head empty.
Its history with us
Every known pass this rock makes, 1900 to 2200. Dim dots are the past, green dots are still to come, the big orange ring is this one. The dashed line is the Moon's distance, so anything below it is closer than the Moon. Almost nothing is.
| Date | Miss distance | Speed |
|---|---|---|
| 19th November 2026 (this one) | 34.1 LD · 13,132,347 km | 8.7 km/s |
| 18th August 2028 | 178.3 LD · 68,573,772 km | 12.4 km/s |
| 1st January 2029 | 24.4 LD · 9,398,642 km | 12.3 km/s |
| 23rd December 2030 | 153.0 LD · 58,856,747 km | 23.8 km/s |
| 7th November 2035 | 91.2 LD · 35,055,140 km | 18.0 km/s |
| 16th November 2037 | 32.4 LD · 12,451,730 km | 8.8 km/s |
| 20th August 2039 | 177.0 LD · 68,057,849 km | 12.1 km/s |
| 1st January 2040 | 22.0 LD · 8,465,541 km | 12.1 km/s |
| 23rd December 2041 | 152.5 LD · 58,661,143 km | 23.7 km/s |
| 6th November 2046 | 85.6 LD · 32,921,128 km | 17.5 km/s |
By the numbers
- Estimated mass
- 1.0 million tonnes to 11.3 million tonnesVolume of a sphere at NASA's smallest and largest width estimates, times 3,000 kg per cubic metre (typical rock). Real shapes are lumpier, so treat it as a ballpark.
- Swimming pools of rock
- 572 Olympic poolsSphere volume at the middle width estimate, divided by 2,500 cubic metres per Olympic pool.
- Impact energy, if it hit
- 9.2 megatons to 103 megatonsHalf mass times speed squared, at the small and large width estimates, converted to TNT (1 kiloton is 4.184 trillion joules). A rock this far away is not going to do this.
- Speed against escape velocity
- 0.8 timesIts speed relative to Earth, divided by the 11.186 km/s needed to leave Earth's gravity. It is travelling a lot faster than we can throw things.
- Speed against Earth in orbit
- 0.29 timesDivided by Earth's own orbital speed of 29.78 km/s around the Sun.
- Time to cross the UK
- 111.2 secondsLand's End to John o' Groats is about 970 km in a straight line. Divided by its speed.
- Time to fly the miss distance
- 17.4 daysThe miss distance divided by its speed. This is how long it needs to cover a gap of that size, which is a measure of how near or far the pass is.
- Light takes to cross the gap
- 43.8 secondsMiss distance divided by the speed of light.
- Width from brightness alone
- 86 to 193 mAstronomers estimate size from how bright an asteroid is (H 22.4) and how reflective it is. A shiny rock (albedo 0.25) is smaller than a dark one (0.05) for the same brightness. NASA's own estimate above uses the same idea.
- Laps of the Sun since first spotted
- 20.14,758 days of observation divided by its 237-day year.
- Known close approaches, 1900 to 2200
- 1470 inside the Moon's orbit and 0 within ten lunar distances.
- Closest pass in that period
- 16.31 lunar distancesOn 31st December 1918.
- Next visit after this one
- 18th August 2028At 178.3 lunar distances. No closer than this time.
- Average gap between visits
- 2.0 yearsThe span of the record divided by the number of gaps between approaches.
- Rank by size
- 19 of 42Among every asteroid this site has tracked, biggest first.
- Rank by closeness
- 7 of 42Among every asteroid this site has tracked, using each one's most recent pass, closest first.
- Rank by speed
- 37 of 42Among every asteroid this site has tracked, fastest first.
How reliable are these?
Width, speed, miss distance and orbit come straight from NASA. Mass, energy, volume and the rankings are our own arithmetic on top, and the assumptions are written beside each one. NASA publishes a range for width because nobody has seen most of these rocks up close, so wherever we show one number it uses the biggest estimate and says so.
Will asteroid 2004 XK14 hit Earth? Questions answered
Will asteroid 2004 XK14 hit Earth?
No. 2004 XK14 passes Earth on 19th November 2026 at 34.1 lunar distances (13,132,347 km), which is 34.1 times the distance to the Moon. It is not on NASA's potentially hazardous list. It is not on NASA's Sentry impact-risk watch list.
How big is asteroid 2004 XK14?
NASA estimates it is between 86 m and 193 m wide, which at the top end is about 1.8 football pitches long. Nobody has seen it up close, so the width is an estimate from its brightness.
How fast is asteroid 2004 XK14 travelling?
8.7 km/s relative to Earth at closest approach, about 31,401 km/h (19,512 mph). That is 1.1 times the speed of the International Space Station.
Is 2004 XK14 a potentially hazardous asteroid?
No. NASA gives the label to asteroids whose orbit comes within 0.05 astronomical units of Earth's (about 7.5 million km) and which are bigger than roughly 140 m. 2004 XK14 has an absolute magnitude of 22.4 and its orbit comes within 0.025 AU of Earth's.
When is asteroid 2004 XK14's next close approach?
After this pass, the next one in NASA's record is on 19th November 2026, at 34.1 lunar distances.
Unhelpful facts
- As fast as 702 Usain Bolts at top speed, none of whom have been told.
- 805 basketballs wide. Somebody in the NBA has already asked for the numbers.
- 543 large pizzas wide. Delivery in thirty minutes or it is free (it will not be free).
- If it did hit, that would release roughly 103 megatons of TNT, assuming solid rock. It will not, so enjoy the number.
- About 1.8 football pitches long. Still no better than a mid-table side.
- It could overtake 34 commercial jets, and it would not even signal.
- 0.51 Empire State Buildings tall, if you insist on laying New York on its side.
- That is 650 times the speed limit on a 30 zone. Nobody has fined it yet.
- About 552 wheels of Gouda across. A brave scientist would call that a dairy event.
- In the 17.4 days it takes to fly a gap that size, you could drink 1,254 cups of tea. Most would go cold.
- A snail would need 31,874 years to cover the gap. The snail would take the day off.
- A UK train would take 15.0 years to cross the same gap, plus delays "due to a train being late".