Английская Википедия:(7482) 1994 PC1

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Шаблон:Mp is a stony asteroid, classified as near-Earth object and potentially hazardous asteroid of 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. The 2022 approach has been observed every month since August 2021.

Orbit and classification

Шаблон:Mp 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 Шаблон:Convert from the Moon and then about an hour later made its closest known approach to Earth of Шаблон:Convert. On 18 January 2022, it passed about Шаблон:Convert from Earth.

Close approaches

Date	JPL SBDB nominal geocentric distance	uncertainty region (3-sigma)
1933-01-17	Шаблон:Val	± 65 kmШаблон:Efn
2022-01-18	Шаблон:Val	± 47 km
2105-01-18	Шаблон:Val	± 1069 km

Physical characteristics

In the SMASS classification, Шаблон:Mp is a common stony S-type asteroid.

Rotation period

In 1998, a rotational lightcurve of Шаблон:Mp 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 (Шаблон:Small).

Diameter and albedo

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Шаблон:Mp 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, Шаблон:Mp 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	Approach to	Nominal distance
2022-01-18 18:58	Moon	Шаблон:Val
2022-01-18 21:51	Earth	Шаблон:Val

Файл:Animation of 1994 PC1 around Sun - 2022 close approach.gif

Animation of 1994 PC1 - 2022 close approach
Шаблон:Legend2Шаблон:·Шаблон:Legend2Шаблон:·Шаблон:Legend2

Sky trajectory with daily motion

Файл:1994 PC1 skypath 2022.png

Naming

As of 2022, this minor planet has not been named.

See also

• List of asteroid close approaches to Earth in 2022
• Шаблон:Mpl – ~800 meters in diameter and passed 4.57 LD from Earth on 19 April 2017
• Шаблон:Mpl – ~900 meters in diameter and will pass 0.65 LD from Earth on 26 June 2028

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 January 18 (Eddie Irizarry December 30, 2021)
• Asteroid Lightcurve Database (LCDB), query form (info Шаблон:Webarchive)
• Sky and Telescope: The kilometer-wide, potentially hazardous asteroid 1994 PC1 will fly past Earth on January 18th.
• Dictionary of Minor Planet Names, Google books
• Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
• Шаблон:NeoDys
• Шаблон:ESA-SSA
• Шаблон:JPL small body

Шаблон:Minor planets navigator Шаблон:2022 in space Шаблон:Small Solar System bodies