About: 2021 TP21

An Entity of Type: planet, from Named Graph: http://dbpedia.org, within Data Space: dbpedia.org

2021 TP21 is an Apophis-sized asteroid that was discovered on 11 October 2021 when it was 0.5 AU (75 million km) from Earth. This potentially hazardous asteroid (PHA) spends most or its orbit closer to 4 AU (600 million km) from the Sun as objects orbit more slowly when near aphelion (furthest distance from the Sun). 2021 TP21 was rated with a Torino scale of 1 from 31 October 2021 to 4 November 2021 for a potential impact on 27 March 2081. As the observation arc became longer the nominal distance from Earth became further on the potential impact date.

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dbo:abstract	2021 TP21 is an Apophis-sized asteroid that was discovered on 11 October 2021 when it was 0.5 AU (75 million km) from Earth. This potentially hazardous asteroid (PHA) spends most or its orbit closer to 4 AU (600 million km) from the Sun as objects orbit more slowly when near aphelion (furthest distance from the Sun). 2021 TP21 was rated with a Torino scale of 1 from 31 October 2021 to 4 November 2021 for a potential impact on 27 March 2081. As the observation arc became longer the nominal distance from Earth became further on the potential impact date. (en) 2021 TP21とは、地球から0.5天文単位 (75×106 km)離れた位置で2021年10月11日に発見されたアポフィスと同程度のサイズの小惑星である。この潜在的に危険な小惑星（PHA）は、遠日点に近い位置では軌道を周回する速度が遅くなるため、公転周期の内ほとんどを太陽から4天文単位（約6億キロメートル）に近い位置で費やしている。2021 TP21は、2021年10月31日~2021年11月4日までのトリノスケール1で、2081年3月27日の潜在的な影響について評価された。観測弧が長くなるにつれて、地球からの距離の公称値が潜在的な影響の日よりも遠くなった。 (ja)
dbo:discovered	2021-10-11 (xsd:date)
dbo:discoverer	dbr:Mount_Lemmon_Survey
dbo:epoch	2021-Jul-01 (JD 2459396.5)
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rdfs:comment	2021 TP21 is an Apophis-sized asteroid that was discovered on 11 October 2021 when it was 0.5 AU (75 million km) from Earth. This potentially hazardous asteroid (PHA) spends most or its orbit closer to 4 AU (600 million km) from the Sun as objects orbit more slowly when near aphelion (furthest distance from the Sun). 2021 TP21 was rated with a Torino scale of 1 from 31 October 2021 to 4 November 2021 for a potential impact on 27 March 2081. As the observation arc became longer the nominal distance from Earth became further on the potential impact date. (en) 2021 TP21とは、地球から0.5天文単位 (75×106 km)離れた位置で2021年10月11日に発見されたアポフィスと同程度のサイズの小惑星である。この潜在的に危険な小惑星（PHA）は、遠日点に近い位置では軌道を周回する速度が遅くなるため、公転周期の内ほとんどを太陽から4天文単位（約6億キロメートル）に近い位置で費やしている。2021 TP21は、2021年10月31日~2021年11月4日までのトリノスケール1で、2081年3月27日の潜在的な影響について評価された。観測弧が長くなるにつれて、地球からの距離の公称値が潜在的な影響の日よりも遠くなった。 (ja)
rdfs:label	2021 TP21 (en) 2021 TP21 (ja)
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