Jump to content

S/2019 S 1

From Wikipedia, the free encyclopedia
S/2019 S 1
Canada–France–Hawaii Telescope image of S/2019 S 1 (center), revealed by stacking many images while following the moon's motion
Discovery[1]
Discovered byE. Ashton et al.
Discovery date2019 (announced 2021)
Designations
e26r58a12[2]
Orbital characteristics[1]
11221100 km
Eccentricity0.623
443.78 days
Inclination44.4°
Satellite ofSaturn
GroupInuit group (Kiviuq)[3][2]
Physical characteristics[4]
5+30%
−15% km
Albedo0.06 (assumed)
25.3
15.3

S/2019 S 1 is a natural satellite of Saturn. Its discovery was announced by Edward Ashton, Brett J. Gladman, Jean-Marc Petit, and Mike Alexandersen on 16 November 2021 from Canada–France–Hawaii Telescope observations taken between 1 July 2019 and 14 June 2021.[1]

Apparent path of S/2019 S 1 as seen from Earth during 2019–2021. Coloured circles along the path mark the dates and locations at which the moon was observed.

S/2019 S 1 is about 5 kilometres in diameter, and orbits Saturn at an average distance of 11.2 million km (7.0 million mi) in 443.78 days, at an inclination of 44° to the ecliptic, in a prograde direction and with an eccentricity of 0.623.[1] It belongs to the Inuit group of prograde irregular satellites, and is among the innermost irregular satellites of Saturn.[3] It might be a collisional fragment of Kiviuq and Ijiraq, which share very similar orbital elements.[4]

This moon's eccentric orbit takes it closer than 1.5 million km (0.93 million mi) to Iapetus several times per millennium.[4]

References

[edit]
  1. ^ a b c d "MPEC 2021-W14 : S/2019 S 1". minorplanetcenter.net. Retrieved 16 November 2021.
  2. ^ a b Ashton, Edward; Gladman, Brett; Beaudoin, Matthew; Alexandersen, Mike; Petit, Jean-Marc (May 2022). "Discovery of the Closest Saturnian Irregular Moon, S/2019 S 1, and Implications for the Direct/Retrograde Satellite Ratio". The Astronomical Journal. 3 (5): 5. Bibcode:2022PSJ.....3..107A. doi:10.3847/PSJ/ac64a2. S2CID 248771843. 107.
  3. ^ a b Ashton, Edward; Gladman, Brett; Beaudoin, Matthew; Alexandersen, Mike; Petit, Jean-Marc (October 2021). Detection biases favour retrograde over direct irregular moons. 53rd Annual DPS Meeting. American Astronomical Society. 308.09. Archived from the original on 10 January 2023. Retrieved 17 November 2021.
  4. ^ a b c "S/2019 S 1 – Tilmann Denk".


Stub icon

This article related to a natural satellite is a stub. You can help Wikipedia by expanding it.

Retrieved from "https://en.wikipedia.org/w/index.php?title=S/2019_S_1&oldid=1300967911"