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99942 Apophis ( provisional designation 2004 MN4) is a near-Earth asteroid and a potentially hazardous object with a diameter of 370 metres (1,210 feet) [3] that caused a brief period of concern in December 2004 when initial observations indicated a probability up to 2.7% that it would hit Earth on April 13, 2029.
989 Schwassmannia. 989 Schwassmannia ( prov. designation: A922 WD or 1922 MW) is a stony background asteroid and a slow rotator from the central regions of the asteroid belt, approximately 12.5 kilometers (7.8 miles) in diameter. It was discovered on 18 November 1922, by astronomer Friedrich Karl Arnold Schwassmann at the Bergedorf Observatory ...
Property damage. A few damaged buildings. The Tunguska event (occasionally also called the Tunguska incident) was a large explosion of between 3 and 50 megatons [2] that occurred near the Podkamennaya Tunguska River in Yeniseysk Governorate (now Krasnoyarsk Krai ), Russia, on the morning of 30 June 1908. [1] [3] The explosion over the sparsely ...
Absolute magnitude (H) 9.7 [1] [4] 464 Megaira ( prov. designation: A901 AB or 1901 FV) is a dark and large background asteroid, approximately 77 kilometers (48 miles) in diameter, located in the central region of the asteroid belt. It was discovered by astronomer Max Wolf at the Heidelberg Observatory in southwest Germany on 9 January 1901. [1]
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736 Harvard ( prov. designation: A912 WC or 1912 PZ) is a stony background asteroid from the inner regions of the asteroid belt, approximately 17 kilometers (11 miles) in diameter. It was discovered on 16 November 1912, by American astronomer Joel Hastings Metcalf at the Winchester Observatory ( 799 ). [1]
Asteroid. 253 Mathilde, asteroid jenis-C berukuran 50 km . Gambar diambil pada 1997 oleh prob NEAR Shoemaker. Asteroid ialah objek kecil dalam sistem suria yang mengelilingi matahari yang mempunyai saiz yang lebih kecil daripada planet. Oleh sebab itu, asteroid tergolong dalam kumpulan planet kecil ( minor planet) atau dikenali sebagai planetoid .
