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C/2024 G3 (ATLAS) was a non-periodic comet, which reached perihelion on 13 January 2025, at a distance of 0.09 AU (13 million km) from the Sun.Dubbed the Great Comet of 2025, it is currently the brightest comet of 2025, [6] with an apparent magnitude reaching −3.8 on the day of its perihelion. [5]
By early April 2025 and until June 2028, 2024 YR 4 will have moved too far away from Earth to be observed by even the largest ground-based telescopes. [12] Space-based infrared telescopes such as the James Webb Space Telescope (JWST) and the Hubble Space Telescope may be able to observe 2024 YR 4 when it is far from Earth. [ 12 ]
The first time Pluto reaches aphelion since its discovery. [37] 2114 Sedna overtakes Eris as the farthest-known planet-like object orbiting the Sun. 2117 December 11 Transit of Venus [38] for the first time since 2012: 2119 May 17 Periodic comet 144P/Kushida will pass about 0.049 AU (7.3 million km; 4.6 million mi; 19 LD) from Mars. [39] 2123
2022 OB 5 is a small near-Earth asteroid that passed within 0.00679 AU (1,016,000 km) from Earth on 5 August 2022. [2] It is the primary target of AstroForge's Brokkr-2 (Odin) mission, which is planned for launch alongside IM-2 by February 2025, reaching the asteroid around December 2025. [3]
The apsides refer to the farthest (2) and nearest (3) points reached by an orbiting planetary body (2 and 3) with respect to a primary, or host, body (1). An apsis (from Ancient Greek ἁψίς (hapsís) 'arch, vault'; pl. apsides / ˈ æ p s ɪ ˌ d iː z / AP-sih-deez) [1] [2] is the farthest or nearest point in the orbit of a planetary body about its primary body.
2015 XF 261 is a Near-Earth Aten asteroid with an estimated diameter of between 16 m (52 ft) and 69 m (226 ft), [2] with next closest approach occurring on 21 February 2025 at 16:25 UTC and closest approach of the 21st century occurring on 11 April 2090 at a nominal distance of 0.00302 au (452,000 km). [1]
As of January 2025, there are 34 known Atiras, two of which are named, nine of which have received a numbered designation, and seven of which are potentially hazardous objects. [2] [9] [10] An additional 127 objects have aphelia smaller than Earth's aphelion (Q = 1.017 AU). [11]
As described by Kepler's laws of planetary motion which applies to any object in an orbit, due to gravity the spacecraft will accelerate as it nears perihelion, then slow down again afterward until it reaches its aphelion. Because of its highly elliptical orbit and the Sun's strong gravity, this effect is particularly pronounced for the Parker ...