باسيفاي (قمر)

يجب ألا يـُخلـَط بينها وبين Pasithee (moon).
Pasiphae
Pasiphaé.jpg
Pasiphae photographed by the Haute-Provence Observatory in August 1998
الاكتشاف[1]
اكتشفهPhilibert J. Melotte
موقع الاكتشافRoyal Observatory, Greenwich
تاريخ الاكتشاف27 January 1908
التسميات
تعيين الكوكب الأصغرJupiter VIII
النطق []pəˈsɪfeɪ.iː[][2][3]
مسمى على اسم
Πασιφάη Pāsiphaē
1908 CJ
الصفاتPasiphaëan []ˌpæsᵻfeɪˈiːən[][4]
السمات المدارية[5]
حقبة 23 March 2018 (JD 2458200.5)
قوس الرصد110.34 yr (40,303 days)
0.1551422 AU (23،208،940 km)
Eccentricity0.6110162
–722.34 d
259.25505°
0° 29m 54.18s / day
Inclination153.40903° (to ecliptic)
19.11682°
241.59647°
Satellite ofJupiter
السمات الطبيعية
Mass1.72×1017 kg (calculated)
Mean density
1.70 g/cm3 (assumed)[7]
Albedo0.044±0.006[6]
16.9[8]
10.1[5]

باسيفاي ( Pasiphaë ؛ []pəˈsɪfeɪ.iː[]، وكان يُكتب في السابق: Pasiphaë)،[9] هو ساتل غير منتظم متراجع لكوكب المشتري اكتشفه الفلكي فيلبير جاك ميلوت سنة 1908.[1][10] and later named after the mythological Pasiphaë, wife of Minos and mother of the Minotaur from Greek legend.

The moon was first spotted on a plate taken at the Royal Greenwich Observatory on the night of 28 February 1908. Inspection of previous plates found it as far back as January 27. It received the provisional designation 1908 CJ, as it was not clear whether it was an asteroid or a moon of Jupiter. The recognition of the latter case came by April 10.[11]

Pasiphae did not receive its present name until 1975;[12] before then, it was simply known as Jupiter VIII. It was sometimes called "Poseidon"[13] between 1955 and 1975.

المدار

Retrograde irregular satellites of Jupiter.

Pasiphae orbits Jupiter on a high eccentricity and high inclination retrograde orbit. It gives its name to the Pasiphae group, irregular retrograde moons orbiting Jupiter at distances ranging between 22.8 and 24.1 million km, and with inclinations ranging between 144.5° and 158.3°.[14] The orbital elements are as of January 2000.[15] They are continuously changing due to solar and planetary perturbations. The diagram illustrates its orbit in relation to other retrograde irregular satellites of Jupiter. The eccentricity of selected orbits is represented by the yellow segments (extending from the pericentre to the apocentre). The outermost regular satellite Callisto is located for reference.

Pasiphae is also known to be in a secular resonance with Jupiter (tying the longitude of its perijove with the longitude of perihelion of Jupiter).[16]

الخصائص الطبيعية

With a diameter estimated at 58 km, Pasiphae is the largest retrograde and third largest irregular satellite after Himalia و إلارا.

باسيفاي قمر صغير (قمير) يبلغ قطره نحو 23.500,000 كيلو متر فهو من الأقمار البعيدة جدا عن امه وهو أيضا من الأقمار التى تدور في اتجاه مضاد لدوران الأقمار الأخرى. الجدير بالذكر أن پاسيفاي غاب عن النظر بعد اكتشافه سنة (1908) وعثر عليه ثانية سنة 1922 ثم فقد مرة أخرى حتى سنة 1932 ومرة ثالثة بين سنة 1941 وسنة 1955.

Spectroscopical measurements in infrared indicate that Pasiphae is a spectrally featureless object, consistent with the suspected asteroidal origin of the object. Pasiphae is believed to be a fragment from a captured asteroid along with other Pasiphae group satellites.[17][18] The satellite appears pale red (colour indices V=17.22 B-V=0.74, R-V=0.38) though it falls into the grey color-class of C-type asteroids.[19]

انظر ايضا

المراجع

  1. ^ أ ب Melotte, P. J. (1908). "Note on the Newly Discovered Eighth Satellite of Jupiter, Photographed at the Royal Observatory, Greenwich". Monthly Notices of the Royal Astronomical Society. 68 (6): 456–457. Bibcode:1908MNRAS..68..456.. doi:10.1093/mnras/68.6.456.
  2. ^ Noah Webster (1884). A Practical Dictionary of the English Language.
  3. ^ قالب:Dict.com
  4. ^ Laurent Milesi (2003). James Joyce and the difference of language. p. 149.
  5. ^ أ ب "M.P.C. 111777" (PDF). Minor Planet Circular. Minor Planet Center. 25 September 2018.
  6. ^ أ ب Grav, T.; Bauer, J. M.; Mainzer, A. K.; Masiero, J. R.; Nugent, C. R.; Cutri, R. M.; et al. (August 2015). "NEOWISE: Observations of the Irregular Satellites of Jupiter and Saturn". The Astrophysical Journal. 809 (1): 9. arXiv:1505.07820. Bibcode:2015ApJ...809....3G. doi:10.1088/0004-637X/809/1/3. S2CID 5834661. 3.
  7. ^ Chen, Zhenghan; Yang, Kun; Liu, Xiaodong (2023-12-23). ""Life" of dust originating from the irregular satellites of Jupiter". Monthly Notices of the Royal Astronomical Society. 527 (4): 11327–11337. arXiv:2402.03680. doi:10.1093/mnras/stad3829. ISSN 0035-8711.
  8. ^ Sheppard, Scott. "Scott S. Sheppard - Jupiter Moons". Department of Terrestrial Magnetism. Carnegie Institution for Science. Retrieved 26 November 2020.
  9. ^ "Planetary Names: Planet and Satellite Names and Discoverers".
  10. ^ Perrine, C. D.; Perrine, C. D. (June 1908). "Recent Observations of the Moving Object Near Jupiter, Discovered at Greenwich by Mr. J. Melotte". Publications of the Astronomical Society of the Pacific. 20 (120): 184–185. Bibcode:1908PASP...20..184M. doi:10.1086/121815.
  11. ^ Cowell, P. H. (1908). "Note on the Discovery of a Moving Object Near Jupiter". Monthly Notices of the Royal Astronomical Society. 68: 373. Bibcode:1908MNRAS..68..373.. doi:10.1093/mnras/68.5.373.
  12. ^ IAUC 2846: Satellites of Jupiter 7 October 1974 (naming the moon)
  13. ^ Payne-Gaposchkin, Cecilia; Katherine Haramundanis (1970). Introduction to Astronomy. Englewood Cliffs, N.J.: Prentice-Hall. ISBN 0-134-78107-4.
  14. ^ Sheppard, S. S.; Jewitt, D. C.; and Porco, C. C.; Jupiter's Outer Satellites and Trojans Archived 2007-06-14 at the Wayback Machine, in Jupiter: The Planet, Satellites and Magnetosphere, edited by Fran Bagenal, Timothy E. Dowling, and William B. McKinnon, Cambridge Planetary Science, Vol. 1, Cambridge, UK: Cambridge University Press, ISBN 0-521-81808-7, 2004, pp. 263-280
  15. ^ Jacobson, R. A. (2000). "The Orbits of the Outer Jovian Satellites". Astronomical Journal. 120 (5): 2679–2686. Bibcode:2000AJ....120.2679J. doi:10.1086/316817. S2CID 120372170.
  16. ^ Nesvorný, D.; Beaugé, C.; Dones, L. (2004). "Collisional Origin of Families of Irregular Satellites". The Astronomical Journal. 127 (3): 1768–1783. Bibcode:2004AJ....127.1768N. doi:10.1086/382099.
  17. ^ Brown, M. E. (2000). "Near-Infrared Spectroscopy of Centaurs and Irregular Satellites". The Astronomical Journal. The American Astronomical Society. 119 (2): 977–983. Bibcode:2000AJ....119..977B. CiteSeerX 10.1.1.22.1349. doi:10.1086/301202. S2CID 15143844.
  18. ^ Sheppard, S. S.; and Jewitt, D. C.; An Abundant Population of Small Irregular Satellites Around Jupiter Archived 5 أغسطس 2003 at the Wayback Machine, Nature, Vol. 423 (May 2003), pp. 261-263
  19. ^ Grav, T.; Holman, M. J.; Gladman, B. J.; and Aksnes, K.; Photometric Survey of the Irregular Satellites, Icarus, Vol. 166 (2003), pp. 33-45

المصادر

وصلات خارجية

This article may include material from Wikimedia licensed under CC BY-SA 4.0. Please comply with the license terms.
تمّ الاسترجاع من "https://www.marefa.org/w/index.php?title=باسيفاي_(قمر)&oldid=4112602"