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6 days ago · Main Belt Is Not Mass Rich. The main asteroid belt is primarily composed of objects from two distinct taxonomic classes; S-Complex asteroids and C-Complex asteroids, the authors note.
Mar 27, 2024 · Red (S > 10%/0.1 micron) spectral slopes are common among Centaurs and trans-Neptunian objects (TNOs) in the outer solar system. Interior to and co-orbital with Jupiter, the red (S approx. = 10%/0.1 micron) slopes of D-type main-belt and Jupiter Trojan asteroids are thought to reflect their hypothesized shared origin with TNOs beyond the orbit of Jupiter. In order to quantify the abundance of ...
Mar 25, 2024 · Vesta is the only main-belt asteroid visible to the unaided eye. Its mass is about 2.6 × 10 20 kg, and its density is 3.46 grams per cubic cm (about the same as that of the Moon). It rotates once in 5.3 hours. The U.S. spacecraft Dawn went into orbit around Vesta on July 16, 2011, and left on September 5, 2012, for a rendezvous with Ceres.
Mar 26, 2024 · The asteroid 2005 XR 132 (hereafter XR 132) is located in the outer main asteroid belt with a highly eccentric orbit ( a = 3.763 au, e = 0.432, i = 14.47°, Q = 5.389 au, TJ = 2.868) close to the 13:8 high-order MMR of Jupiter. Even though XR 132 is a Jupiter crosser ( Q > QJ ), the high-inclination orbit makes the current MOID of Jupiter as ...
3 days ago · Hypatia was honored as an astronomer when 238 Hypatia, a main belt asteroid discovered in 1884, was named for her. The lunar crater Hypatia was also named for her, in addition to craters named for her father Theon. The 180 km Rimae Hypatia are located north of the crater, one degree south of the equator, along the Mare Tranquillitatis.
- March 415 AD (aged 45–65), Alexandria, Province of Egypt, Eastern Roman Empire
- Western philosophy
4 days ago · A near-Earth object ( NEO) is any small Solar System body orbiting the Sun whose closest approach to the Sun ( perihelion) is less than 1.3 times the Earth–Sun distance ( astronomical unit, AU). [2] This definition applies to the object's orbit around the Sun, rather than its current position, thus an object with such an orbit is considered ...
1 day ago · A Mars flyby/gravity assist followed on 25 February 2007, and two more Earth gravity assists on 13 November 2007 and 13 November 2009. In between these Earth flybys, on 5 September 2008 at 18:58 UTC, Rosetta flew within 800 km of asteroid 2867 Steins at a relative velocity of 8.6 km/s. Steins is a main belt E-type asteroid 4.6 km in diameter.
