2012 LZ1

{{Infobox planet

| minorplanet = yes

| background = #FFC2E0

| name = {{mp|2012 LZ|1}}

| image = 2012LZ1 Radar Jun19.png

| image_scale =

| caption = Radar image of {{mp|2012 LZ|1}} by the Arecibo Observatory in 2012

| discovery_ref =

| discoverer = Robert H. McNaught

| discovery_site = Siding Spring Survey

| discovered = 10 June 2012

| mpc_name = {{mp|2012 LZ|1}}

| mp_category = {{Hlist

| Amor

| NEO

| PHA

}}

| orbit_ref =

| epoch = 13 January 2016 (JD 2457400.5)

| aphelion = {{Convert|4.0667|AU|Gm|abbr=on|lk=on}} (Q)

| perihelion = {{Convert|1.0492|AU|Gm|abbr=on}} (q)

| semimajor = {{Convert|2.5579|AU|Gm|abbr=on}} (a)

| eccentricity = 0.58984 (e)

| period = 4.09 yr (1494.3 d)

| inclination = 26.102° (i)

| asc_node = 264.53° (Ω)

| mean_anomaly = 312.53° (M)

| arg_peri = 14.241° (ω)

| dimensions = ~1 km

| mass =

| sidereal_day = 10–15 hr

| albedo = 0.02–0.04

| magnitude =

| abs_magnitude = 19.9

| mean_motion = {{Deg2DMS|0.24092|sup=ms}} / day (n)

| rotation = {{Convert|12.87|h|d|abbr=on|lk=on}}

| uncertainty = 2

| moid = {{Convert|0.043164|AU|Gm|abbr=on}}

| jupiter_moid = {{Convert|1.1348|AU|Gm|abbr=on}}

}}

{{mp|2012 LZ|1}} is an asteroid classified as near-Earth object and potentially hazardous asteroid of the Amor group, approximately {{convert|1|km|abbr=on|sp=us}} in diameter. It passed within 5.4 million kilometers (14 lunar distances) of Earth on 14 June 2012.{{cite web|url=http://www.csmonitor.com/Science/2012/0614/Humongous-asteroid-to-hurtle-past-Earth-Thursday-video|work=The Christian Science Monitor|accessdate=2012-06-14|date=2012-06-14|title=Humongous asteroid to hurtle past Earth Thursday}} It was discovered during the night of 10–11 June 2012 by astronomer Robert H. McNaught and his colleagues using the 0.5-meter Uppsala Southern Schmidt Telescope at the Siding Spring Observatory in Australia, just four days before its closest approach to Earth.{{cite web|url=http://www.space.com/16131-huge-asteroid-flyby-2012-lz1-webcast.html |date=13 June 2012 |title=Huge Asteroid to Fly by Earth Thursday: How to Watch Online |website=Space.com |accessdate=2012-06-14}}{{cite web|last=Wall |first=Mike |url=http://www.nbcnews.com/id/47805799 |title=Huge asteroid to fly by Earth Thursday{{Snd}} Technology & science{{Snd}} Space{{Snd}} Space.com |website=NBC News |date=2012-05-20 |accessdate=2012-06-14}}{{dead link|date=August 2024|bot=medic}}{{cbignore|bot=medic}}

Overview

Arecibo radar observations on 19 June 2012 have shown that {{mp|2012 LZ|1}} is about {{convert|1|km}} in diameter and that {{mp|2012 LZ|1}} has zero chance of impacting the Earth for at least the next 750 years.

A small change of trajectory caused by Earth's gravity was predicted from the 2012 passby. The Slooh Space Camera streamed live footage of the passby over the Internet. McNaught and Astronomy magazine columnist Bob Berman hosted the broadcast. "We love it when stuff like this happens, because it's fun to do and the public appreciates it", said Slooh president Patrick Paolucci. The asteroid was the same brightness as a 13th-magnitude star, too faint to be seen by the naked eye or a low-end telescope.{{cite news|title=Large Asteroid to Buzz Earth Tonight—Watch It Live|author=Ker Than|work=National Geographic|date=2012-06-14|url=http://news.nationalgeographic.com/news/2012/06/120614-asteroid-earth-planet-close-watch-online-space-science/|archive-url=https://web.archive.org/web/20120617031130/http://news.nationalgeographic.com/news/2012/06/120614-asteroid-earth-planet-close-watch-online-space-science|url-status=dead|archive-date=17 June 2012|accessdate=2012-06-14}}

The next passby for {{mp|2012 LZ|1}} was 27 July 2016 at {{convert|0.5|AU|km mi|abbr=on|lk=off}} from Earth.{{cite web

|title=2012 LZ1 Ephemerides for July 2016

|publisher=NEODyS (Near Earth Objects{{Snd}} Dynamic Site)

|url=https://newton.spacedys.com/neodys/index.php?pc=1.1.3.1&n=2012LZ1&oc=500&y0=2016&m0=7&d0=15&h0=0&mi0=0&y1=2016&m1=8&d1=15&h1=0&mi1=0&ti=1.0&tiu=days

|accessdate=2012-06-15}}