(7482) 1994 PC1

Near-Earth asteroid October 2019 yes (7482) 1994 PC 1 #FFC2E0 1994-PC1-orbit.png Orbit with positions Jan 2020 R. H. McNaught Siding Spring Obs. 9 August 1994 (7482) 1994 PC 1 ApolloNEOPHA 2022-Jan-21 (JD 2459600.5) 0 47.23 yr (17,251 days) 22 September 1974 1.7935 AU 0.9042 AU 1.3488 AU 0.3297 1.56 yr (572 days) 337.27° 0.6310 ms / day 33.479° 117.88° 47.477° 0.00054 AU LD on 0.139 AU e6km unit 1.052 0.303 km1.30 km (calculated) 2.5999 h 0.277 0.1850.20 (assumed) SMASS S 16.616.80 0.3 (7482) 1994 PC 1 is a stony asteroid and near-Earth object, currently estimated to be the most potentially hazardous asteroid over the next 1000 years.Carter Jamie 29 May 2023 We Are (Probably) Safe From Asteroids For 1,000 Years, Say Scientists https://www.forbes.com/sites/jamiecartereurope/2023/05/27/we-are-probably-safe-from-asteroids-for-1000-years-say-scientists/ 2024-09-29 Forbes enFuentes-Muñoz Oscar Scheeres Daniel J. Farnocchia Davide Park Ryan S. 2023-06-12 The Hazardous km-sized NEOs of the Next Thousands of Years The Astronomical Journal en 166 1 10 10.3847/1538-3881/acd378 free 2305.04896 2023AJ....166...10F 1538-3881 It is in the Apollo group, approximately 1.1 kilometers in diameter. It was discovered on 9 August 1994, by astronomer Robert McNaught at the Siding Spring Observatory in Coonabarabran, Australia. With an observation arc of 47 years it has a very well known orbit and was observed by Goldstone radar in January 1997. Of all the known asteroids larger than 1 km, 1994 PC 1 has the largest probability of a "deep close encounter" with Earth over the next 1000 years. It has a close encounter with Earth in 2525, after which the uncertainty of its orbit increases. Orbit and classification 1994 PC 1 orbits the Sun at a distance of 0.9–1.8 AU once every 1 years and 7 months (572 days). Its orbit has an eccentricity of 0.33 and an inclination of 33° with respect to the ecliptic. On 17 January 1933, it passed 811350 km mi on off from the Moon and then about an hour later made its closest known approach to Earth of 1125400 km mi on off. On 18 January 2022, it passed about 1981468 km mi on off from Earth. +Close approaches Date JPL SBDBnominal geocentricdistance uncertaintyregion(3-sigma)1933-01-17 1125383 km ± 65 kmprecovery2022-01-18 1981468 km ± 47 km2105-01-18 2328125 km ± 1069 km Physical characteristics In the SMASS classification, 1994 PC 1 is a common stony S-type asteroid. Rotation period In 1998, a rotational lightcurve of 1994 PC 1 was obtained from photometric observations by Petr Pravec. Lightcurve analysis gave a well-defined rotation period of 2.5999 hours with a brightness amplitude of 0.29 magnitude (U=3). Diameter and albedo According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, 1994 PC 1 measures 1.052 kilometers in diameter and its surface has an albedo of 0.277. The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.20 and calculates a diameter of 1.30 kilometers based on an absolute magnitude of 16.8. 2022 flyby At 18 January 2022 21:51 UTC, 1994 PC 1 passed 5.15 lunar distances from Earth and had a 3-sigma uncertainty region of less than ± 50 km. It peaked at an apparent magnitude of about 10 placing it just outside the reach of common 7×50 binoculars. The nearly full moon being about 100 degrees from the asteroid during closest approach may have made it more difficult to observe with smaller telescopes. +2022 Moon/Earth approach Date & Time Approachto Nominal distance2022-01-18 18:58 Moon 2085780 km2022-01-18 21:51 Earth 1981468 km 300px|thumb|left|Animation of 1994 PC 1 - 2022 close approach Yellow Sun RoyalBlue EarthMagenta 1994 PC 1 + Sky trajectory with daily motion500px Naming As of 2022, this minor planet has not been named. See also List of asteroid close approaches to Earth in 2022 (671294) 2014 JO 25 – ~800 meters in diameter and passed 4.57 LD from Earth on 19 April 2017 (153814) 2001 WN 5 – ~900 meters in diameter and will pass 0.65 LD from Earth on 26 June 2028 Notes precovery The 1933 approach is better constrained than the 2105 approach as a result of the 1974, 1977, 1980 precovery images of the asteroid. References 30em Under "Distance Units" select km for more sig figs JPL Small-Body Database Browser: 7482 (1994 PC1) https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=7482&view=OPC Jet Propulsion Laboratory 12 January 2022 7482 (1994 PC1) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=7482 12 January 2022 7482 2 November 2017 6 A. Mainzer T. Grav J. Masiero J. Bauer R. M. Cutri R. S. McMillan C. R. Nugent D. Tholen R. Walker E. L. Wright November 2012 Physical Parameters of Asteroids Estimated from the WISE 3-Band Data and NEOWISE Post-Cryogenic Survey The Astrophysical Journal Letters 760 1 6 2012ApJ...760L..12M 10.1088/2041-8205/760/1/L12 1210.0502 41459166 Petr Pravec Marek Wolf Lenka Sarounová November 1998 Lightcurves of 26 Near-Earth Asteroids Icarus 136 1 124–153 1998Icar..136..124P 10.1006/icar.1998.5993 Asteroid Radar History https://echo.jpl.nasa.gov/asteroids/PDS.asteroid.radar.history.html Jet Propulsion Laboratory 12 January 2022 Horizons Batch for 2022-Jan-18 21:51 UT JPL Horizons https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%277482%27&START_TIME=%272022-Jan-18%2021:51%27&STOP_TIME=%272022-Jan-19%27&STEP_SIZE=%271+day%27&QUANTITIES=%2720,39%27 https://web.archive.org/web/20220113011209/https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%277482%27&START_TIME=%272022-Jan-18+21%3A51%27&STOP_TIME=%272022-Jan-19%27&STEP_SIZE=%271+day%27&QUANTITIES=%2720%2C39%27 2022-01-13 live 2021-01-13 Earth Approach Jan 2022 JPL Horizons https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%277482%27&START_TIME=%272022-01-05%27&STOP_TIME=%272022-01-25%27&STEP_SIZE=%276%20hours%27&QUANTITIES=%279,20%27 2022-01-05 Horizons Batch for 2105-Jan-18 12:28 UT JPL Horizons https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%277482%27&START_TIME=%272105-Jan-18%2012:28%27&STOP_TIME=%272105-Jan-19%27&STEP_SIZE=%271+day%27&QUANTITIES=%2720,39%27 https://web.archive.org/web/20220113025613/https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%277482%27&START_TIME=%272105-Jan-18+12%3A28%27&STOP_TIME=%272105-Jan-19%27&STEP_SIZE=%271+day%27&QUANTITIES=%2720%2C39%27 2022-01-13 live 2021-01-13 Moon Horizons Batch for 2022-Jan-18 18:58 UT JPL Horizons https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%277482%27&START_TIME=%272022-Jan-18%2018:53%27&STOP_TIME=%272022-Jan-18%2019:03%27&STEP_SIZE=%271+min%27&QUANTITIES=%2720,39%27&CENTER=%27@301%27 https://web.archive.org/web/20220119205506/https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%277482%27&START_TIME=%272022-Jan-18+18%3A53%27&STOP_TIME=%272022-Jan-18+19%3A03%27&STEP_SIZE=%271+min%27&QUANTITIES=%2720%2C39%27&CENTER=%27%40301%27 2022-01-19 live 2021-01-19 External links A Giant Asteroid Bigger Than The Empire State Building Is About to Zip Past Earth (Fiona MacDonald 5 January 2022) Huge asteroid will pass Earth safely 18 January (Eddie Irizarry 30 December 2021) Asteroid Lightcurve Database (LCDB), query form (info https://web.archive.org/web/20171216050541/http://www.minorplanet.info/lightcurvedatabase.html 16 December 2017 ) Sky and Telescope: The kilometer-wide, potentially hazardous asteroid 1994 PC1 will fly past Earth on 18 January. Dictionary of Minor Planet Names, Google books Asteroids and comets rotation curves, CdR https://web.archive.org/web/20160729213840/http://obswww.unige.ch/~behrend/page_cou.html 29 July 2016 – Observatoire de Genève, Raoul Behrend 7482 7482 1994PC1 7481 San Marcello 7482 7483 Sekitakakazu 007482 Category:Discoveries by Robert H. McNaught 007482 007482 20220118 19940809