اس/۲۰۰۳ جی ۱۵

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اس/۲۰۰۳ جی ۱۵ (به انگلیسی: S/2003 J 15) از قمرهای طبیعی مشتری است. این قمر به وسیله تیمی از منجمان دانشگاه هاوایی به سرپرستی اسکات اس.شپرد در سال ۲۰۰۳ میلادی کشف شد.[۱][۲]

قطر این قمر حدود دو کیلومتر است و با فاصله متوسط ۲۲٬۷۲۱ مگامتر در ۶۹۹٫۶۷۶ روز، با حرکت مخالف گرد یک بار به دور مشتری می‌چرخد. انحراف آن ۱۴۲ درجه نسبت به دائرةالبروج(۱۴۲ درجه نسبت به استوای مشتری) و خروج از مرکز مدار آن ۰٫۰۹۳۲ است.

این قمر به گروه اننکه تعلق دارد که قمرهای نامنظمی دارد که با حرکت مخالف گرد و فاصله بین ۱۹٫۳ و ۲۲٫۷ گیگا متر و انحراف تقریباً ۱۵۰درجه بدور مشتری می‌چرخند.

جستارهای وابسته[ویرایش]

منابع[ویرایش]

  1. IAUC 8116: Satellites of Jupiter and Saturn 2003 April (discovery)
  2. MPEC 2003-G17: S/2003 J 15 2003 April (discovery and ephemeris)

Philophrosyne[1] (/fɪləˈfrɒsɪn/ or /fɪləˈfrɒzɪn/), also Jupiter LVIII, originally known as S/2003 J 15, is a natural satellite of Jupiter. It was discovered by a team of astronomers from the University of Hawaii led by Scott S. Sheppard, et al. in 2003,[2][3] but then lost.[4][5][6][7] It was recovered in 2017 and given its permanent designation that year.[8]

Characteristics

Philophrosyne is about 2 kilometres in diameter, and orbits Jupiter at an average distance of 22,721 Mm in 699.676 days, at an inclination of 142° to the ecliptic (142° to Jupiter's equator), in a retrograde direction and with an eccentricity of 0.0932.

It belongs to the Pasiphae group, retrograde irregular moons that orbit Jupiter between 22.8 and 24.1 Gm, at inclinations of roughly 150-155°.

Name

The moon was named in 2019 after Philophrosyne (Φιλοφροσύνη), the ancient Greek spirit of welcome, friendliness, and kindness, the daughter of Hephaestus and Aglaea and granddaughter of Zeus. The name originated from a naming contest held on Twitter with some users suggesting the name, most significantly by users CHW3M Myth Experts (@Chw3mmyths) which is an 11th-grade history class studying Greek and Roman philosophy as of 2019, Victoria (@CharmedScribe), and Lunartic (@iamalunartic) who has concurrently helped in naming another Jovian moon Eupheme.[1][9][10]

References

  1. ^ a b "Planet and Satellite Names and Discoverers". USGS Astrogeology Science Center. Retrieved 27 August 2019.
  2. ^ IAUC 8116: Satellites of Jupiter and Saturn Archived 2006-05-05 at the Wayback Machine 2003 April (discovery)
  3. ^ MPEC 2003-G17: S/2003 J 15 2003 April (discovery and ephemeris)
  4. ^ Beatty, Kelly (4 April 2012). "Outer-Planet Moons Found — and Lost". www.skyandtelescope.com. Sky & Telescope. Retrieved 27 June 2017.
  5. ^ Brozović, Marina; Jacobson, Robert A. (9 March 2017). "The Orbits of Jupiter's Irregular Satellites". The Astronomical Journal. 153 (4). Bibcode:2017AJ....153..147B. doi:10.3847/1538-3881/aa5e4d.
  6. ^ Jacobson, B.; Brozović, M.; Gladman, B.; Alexandersen, M.; Nicholson, P. D.; Veillet, C. (28 September 2012). "Irregular Satellites of the Outer Planets: Orbital Uncertainties and Astrometric Recoveries in 2009–2011". The Astronomical Journal. 144 (5). Bibcode:2012AJ....144..132J. doi:10.1088/0004-6256/144/5/132. Retrieved 27 June 2017.
  7. ^ Sheppard, Scott S. (2017). "New Moons of Jupiter Announced in 2017". home.dtm.ciw.edu. Retrieved 27 June 2017. We likely have all of the lost moons in our new observations from 2017, but to link them back to the remaining lost 2003 objects requires more observations a year later to confirm the linkages, which will not happen until early 2018. ... There are likely a few more new moons as well in our 2017 observations, but we need to reobserve them in 2018 to determine which of the discoveries are new and which are lost 2003 moons.
  8. ^ Sheppard, Scott S. (2017). "Jupiter's Known Satellites". home.dtm.ciw.edu. Retrieved 10 August 2017.
  9. ^ "Naming Contest for Newly-discovered Moons of Jupiter". www.iau.org. Retrieved 27 August 2019.
  10. ^ "Public Contest Successfully Finds Names For Jupiter's New Moons". www.iau.org. Retrieved 27 August 2019.