File:Siarnaq_Cassini_color_composite.png · Wikimedia Commons · See Wikimedia Commons
Siarnaq
Sign in to saveAlso known as Saturn XXIX, S/2000 S 3, S/2000 S 3
Siarnaq is the second-largest irregular moon of Saturn. It was discovered on 23 September 2000 by a team of astronomers led by Brett J. Gladman. It was named after the Inuit goddess of the sea, Siarnaq, who is more commonly known as Sedna. Siarnaq is the largest member of Saturn's Inuit group of prograde irregular moons, which orbit far from Saturn in the same direction as the planet's rotation. The moons of the Inuit group are believed to have originated as fragments from the collisional breakup of a larger progenitor moon after it was gravitationally captured into orbit around Saturn several
Key facts
- Planet.name
- Siarnaq
- Planet.image
- Siarnaq Cassini color composite.png
- Planet.caption
- Composite of three images taken by the Cassini spacecraft in 2013, showing Siarnaq's location at ten-minute intervals
- Planet.mpc_name
- Saturn XXIX
- Planet.alt_names
- S/2000 S 3
- Planet.named_after
- Siarnaq
- Planet.adjectives
- Siarnaupian, Siarnaqian
- Planet.discoverer
- Brett J. Gladman et al.
- Planet.discovery_site
- Mauna Kea Obs.
- Planet.discovered
- 23 September 2000
- Planet.epoch
- 17 December 2020 (JD 2459200.5)
- Planet.eccentricity
- 0.5293834
- Planet.period
- +2.42 yr (+883.87 d)
- Planet.mean_anomaly
- 35.08520°
- Planet.inclination
- 43.80073°
- Planet.asc_node
- 40.96116°
- Planet.arg_peri
- 79.59603°
- Planet.satellite_of
- Saturn
via Wikipedia infobox
Wikidata facts
- Diameter
- 39.3
- Mass
- 39
- Orbital period
- 883.87
- Image
- Siarnaq Cassini color composite.png
Show 14 more facts
- argument of periapsis
- 79.59603
- mean anomaly
- 35.08520
- longitude of ascending node
- 40.96116
- time of discovery or invention
- 2000-09-23
- provisional designation
- S/2000 S 3
- orbital eccentricity
- 0.2961
- semi-major axis of an orbit
- 18015400
- orbital inclination
- 43.80073
- albedo
- 0.050
- apparent magnitude
- 19.9
- color index
- 1.03
- name
- Saturn XXIX
- Commons category
- Siarnaq (moon)
- absolute magnitude
- 10.9
Sources (6)
via Wikidata · CC0
~10 min read
Article
12 sectionsContents
- Discovery
- Follow-up and confirmation
- Name
- Background
- Physical characteristics
- Diameter and albedo
- Surface and composition
- Shape and rotation
- Orbit and group
- Notes
- References
- External links
Siarnaq is the second-largest irregular moon of Saturn. It was discovered on 23 September 2000 by a team of astronomers led by Brett J. Gladman. It was named after the Inuit goddess of the sea, Siarnaq, who is more commonly known as Sedna. Siarnaq is the largest member of Saturn's Inuit group of prograde irregular moons, which orbit far from Saturn in the same direction as the planet's rotation. The moons of the Inuit group are believed to have originated as fragments from the collisional breakup of a larger progenitor moon after it was gravitationally captured into orbit around Saturn several billion years ago. Several other small Inuit group moons share similar orbits to Siarnaq, indicating that the moon had experienced another collision after forming from its progenitor.
== Discovery == thumb|left|Discovery images of Siarnaq taken by the CFHT in September 2000 Siarnaq was discovered on 23 September 2000, by an international team of astronomers consisting of Brett J. Gladman, John J. Kavelaars, Jean-Marc Petit, Hans Scholl, Matthew Holman, Brian G. Marsden, Phil Nicholson and Joseph A. Burns. The discovery of Siarnaq formed part of an observational campaign to search for distant irregular satellites around Saturn. The campaign was coordinated by Gladman in late 2000 using various ground-based telescopes equipped with sensitive CCD cameras to survey Saturn's Hill sphere, the region within which satellites can have stable orbits around the planet.