Xiangliu (moon)

Xiangliu

(225088) Gonggong and Xiangliu, images from the Hubble Space Telescope 2009/2010
Provisional or systematic name	S / 2016 (225088) 1
Central body	(225088) Gong gong
Properties of the orbit
Major semi-axis	15,000 km
Periapsis	unknown
Apoapsis	unknown
Orbital time	6 d
Physical Properties
Albedo	0.089 ± 0.031 / 0.009 (system)
Apparent brightness	2.5 (absolute, system) mag
Medium diameter	<100 km
Medium density	1.6 (system) g / cm ³
discovery
Explorer	Gábor Marton Csaba Kiss Thomas G. Muller
Date of discovery	September 18, 2010

Xiangliu is the only known moon of the Kuiper belt - asteroid (225088) Gonggong . Its mean diameter is probably less than 100 kilometers.

Discovery and naming

Xiangliu was discovered on September 18, 2010 by Gábor Marton, Csaba Kiss ( Konkoly Observatory , Budapest , Hungary ) and Thomas G. Müller ( Max Planck Institute , Göttingen , Germany ) during observations of (225088) 2007 OR ₁₀ with the Hubble - Space telescope discovered. Both components of the system could be recognized as clearly separated by the recordings. The discovery was announced at the DPS48 meeting on October 17, 2016, the moon was given the provisional designation S / 2016 (225088) 1 . On February 5, 2020, the moon was named after the nine-headed snake Xiangliu from Chinese mythology.

Track properties

Xiangliu orbits (225088) Gonggong on a prograde orbit at a distance of 15000 km from its center (around 20 Gonggong radii) within 6 days, which corresponds to just 3.2 self- rotations of (225088) Gonggong - due to its unusually slow rotation. A double-bound rotation can be ruled out due to the long orbit of the moon.

Physical Properties

Xiangliu is estimated to be less than 100 km in diameter. The orbit data of the moon could not yet be used to determine the mass of the mother asteroid and the moon. According to current estimates, the asteroid has a size of 1230 km. Thus, Xiangliu is not quite 10% of the diameter of (225088) gong gong.

exploration

After the discovery of (225088) Gonggong in 2007, initially no moon could be made out. Eventually, Xiangliu was discovered in photos from the Hubble Space Telescope from September 2010. After the discovery, the moon was also seen in 2009 images. Further observations are necessary to determine more precise orbit data and the physical structure.

Web links

Commons : Xiangliu - Collection of Images

Individual evidence

↑ ^a ^b ^c C. Kiss, G. Marton, AH Parker, W. Grundy, A. Farkas-Takacs, J. Stansberry, A. Pal, T. Muller, KS Noll, ME Schwamb, AC Barr, LA Young, J Vinko: The mass and density of the dwarf planet (225088) 2007 OR ₁₀ . In: Icarus . 334, 2019, pp. 3–10. arxiv : 1903.05439 . 311.02. bibcode : 2018DPS .... 5031102K . doi : 10.1016 / j.icarus.2019.03.013 .
Initial publication at the American Astronomical Society DPS meeting # 50, with the publication ID 311.02
^ Gábor Marton, Csaba Kiss, Thomas G. Müller: Discovery publication , bibcode : 2016DPS .... 4812022M

↑ (225088) Gong gong = 2007 OR10 . Minor Planet Center . February 5, 2020, accessed on February 22, 2020.

↑ Kelly Beatty: Big Kuiper Object 2007 OR10 Has a Moon

[Kiss2019-1] C. Kiss, G. Marton, AH Parker, W. Grundy, A. Farkas-Takacs, J. Stansberry, A. Pal, T. Muller, KS Noll, ME Schwamb, AC Barr, LA Young, J Vinko: The mass and density of the dwarf planet (225088) 2007 OR ₁₀ . In: Icarus . 334, 2019, pp. 3–10. arxiv : 1903.05439 . 311.02. bibcode : 2018DPS .... 5031102K . doi : 10.1016 / j.icarus.2019.03.013 .
Initial publication at the American Astronomical Society DPS meeting # 50, with the publication ID 311.02

[2] Gábor Marton, Csaba Kiss, Thomas G. Müller: Discovery publication , bibcode : 2016DPS .... 4812022M

[3] (225088) Gong gong = 2007 OR10 . Minor Planet Center . February 5, 2020, accessed on February 22, 2020.

[4] Kelly Beatty: Big Kuiper Object 2007 OR10 Has a Moon