Erriapus Explained

Discovery Ref:[1]
Erriapus
Mpc Name:Saturn XXVIII
Alt Names:S/2000 S 10
Named After:Erriap(p)us
Discoverer:John J. Kavelaars et al.
Discovered:2000
Epoch:2000 January 1.5
Orbit Ref:[2]
Semimajor:17 507 200 km
Eccentricity:0.462
Inclination:38.7
Period:871.1 d
(2.38 yr)
Satellite Of:Saturn
Group:Gallic group
Dimensions:16.30 × 10 × 6.34 km (modeled)[3]
Rotation: h
Albedo:0.06 (assumed)
Spectral Type:light red
B−V=0.83, R−V=0.49
Magnitude:23.0
Abs Magnitude:13.7
Physical Ref:[4]

Erriapus, or Saturn XXVIII (28), is a prograde irregular satellite of Saturn. It was discovered by Brett Gladman, John J. Kavelaars and colleagues in 2000, and given the temporary designation S/2000 S 10.[5] [6] It was named Erriapo in August 2003[7] after Erriapus (also rendered Erriappus), a giant in Gaulish mythology; the name was changed from dative Erriapo to nominative Erriapus per IAU conventions in late 2007.[8] [9]

Erriapus is about 10 kilometres in diameter, and orbits Saturn at an average distance of 17.5 Gm in 871 days.

As a member of the Gallic group of irregular satellites, which share similar orbital characteristics and a light-red colour, Erriapus is hypothesized to have its origin in the break-up of a common progenitor of the group,[10] [11] or to be a fragment of its largest member, Albiorix.[12] It has a rotation period of, and is thought to rotate on its side, giving it similar seasons to those of Uranus.[13] [14] With a fairly elongated shape, it is a candidate for a contact binary or binary moon.[15]

External links

Notes and References

  1. Web site: Planetary Satellite Discovery Circumstances . ssd.jpl.nasa.gov.
  2. Web site: Planetary Satellite Mean Elements . ssd.jpl.nasa.gov.
  3. Melnikov . A. V. . Kopylova . Yu. G. . 2022-12-01 . Simulation of the Rotational Dynamics and Light Curves of Saturn's Small Moons in the Fast Rotation Mode . . en . . 56 . 6 . 403–410 . 10.1134/S0038094622050045 . 1608-3423.
  4. Cassini Observations of Saturn's Irregular Moons . T. . Denk . S. . Mottola . 50th Lunar and Planetary Science Conference . Lunar and Planetary Institute . 2132 . 2019.
  5. Web site: December 7, 2000 . IAUC 7539: S/2000 S 10; OUTER Sats OF THE GIANT PLANETS . www.cbat.eps.harvard.edu.
  6. Web site: December 19, 2000 . MPEC 2000-Y14 : S/2000 S 3, S/2000 S 4, S/2000 S 5, S/2000 S 6, S/2000 S 10 . minorplanetcenter.net.
  7. Web site: August 8, 2003 . IAUC 8177: Sats OF (22); Sats OF JUPITER, SATURN, URANUS . www.cbat.eps.harvard.edu.
  8. Web site: USGS: Spelling of Saturn XXVIII . 2019-08-10 . https://web.archive.org/web/20140202132747/http://astrogeology.usgs.gov/HotTopics/index.php?%2Farchives%2F315-Spelling-of-Saturn-XXVIII.html . 2014-02-02 . dead .
  9. http://www.cbat.eps.harvard.edu/iauc/09100/09191.html IAUC 9191: SATURN XXVIII (ERRIAPUS)
  10. Grav . Tommy . Tommy Grav . Holman . Matthew J. . Matthew J. Holman . Gladman . Brett . Brett J. Gladman . Aksnes . Kaare . Kaare Aksnes . November 2003 . Photometric Survey of the Irregular Satellites . . 166 . 1 . 33–45 . 10.1016/j.icarus.2003.07.005 . astro-ph/0301016 . 2003Icar..166...33G .
  11. Gladman . Brett . Brett Gladman . Kavelaars . J. J. . John J. Kavelaars . Holman . Matthew . Matthew J. Holman . Nicholson . Philip D. . Phil Nicholson . Burns . Joseph A. . Joseph A. Burns . Hergenrother . Carl W. . Carl W. Hergenrother . Petit . Jean-Marc . Jean-Marc Petit . Marsden . Brian G. . Brian G. Marsden . Jacobson . Robert . Gray . William . Grav . Tommy . Tommy Grav . 2001-07-12 . Discovery of 12 satellites of Saturn exhibiting orbital clustering . . en . 412 . 6843 . 163–166 . 10.1038/35084032 . 11449267 . 1476-4687.
  12. Grav . T. . Tommy Grav . Bauer . J. . James Bauer (astronomer) . 2007-03-08 . 2006-11-18 . A deeper look at the colors of the Saturnian irregular satellites . . 191 . 1 . 267–285 . 10.1016/j.icarus.2007.04.020 . astro-ph/0611590 . 2007Icar..191..267G .
  13. Denk . Tilmann . Mottola . S. . 2013-10-01 . Irregular Saturnian Moon Lightcurves from Cassini-ISS Observations: Update . Aas/Division for Planetary Sciences Meeting Abstracts #45 . 406.08 . 2013DPS....4540608D . 45.
  14. October 2013 . Abstract Book Correlating to the Online Bulletin of the American Astronomical Society . 45th Annual Meeting Division for Planetary Sciences . . 45 . 9 . 170.
  15. Book: Denk . Tilmann . Enceladus and the Icy Moons of Saturn . Mottola . Stefano . Tosi . Frederico . Bottke . William F. . Hamilton . Douglas P. . . 2018 . 9780816537488 . 322 . 409–434 . The Irregular Satellites of Saturn . 2018eims.book..409D . 10.2458/azu_uapress_9780816537075-ch020.

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