2 Pallas

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2 Pallas  Pallas symbol.svg
PallasHST2007.jpg
Citra ultraviolet saka Pallas sing dijupuk saka Teleskop Hubble.
Panemon
Panemu Heinrich Wilhelm Olbers
Tanggal ditemokaké 28 Maret 1802
Penamaan
Kategori
planet minor
kulawarga Pallas
Adjektif Palladian[1]
Epos 22 Agustus 2008 (Dina Julian 2454700,5)
Aphelion 3,412 SA (510,468 Gm)
Perihelion 2,132 SA (319,005 Gm)
Sumbu semi-mayor 2,772 SA (414,737 Gm)
Eksentrisitas 0,231
Periode orbit 4,62 a (1686,044 dina)
Kecepatan orbit rata-rata 17,65 km/dtk
Anomali rata-rata 306,605°
Inklinasi 34,838° menyang Ekliptika
34,21° menyang Bidang invariabel[3]
Bujur node menaik 173,134°
Argumen perihelion 310,274°
Ciri-ciri fisik
Dimensi 582×556×500±18 km[4]
544 km (rata-rata)[2]
Massa (2,11±0,26)×1020 kg[5]
Kepadatan rata-rata ~2,8 g/cm³[4]
Gravitasi permukaan di khatulistiwa ~0,18 m/s²
Kecepatan lepas ~0,32 km/s
Periode rotasi 0,325 55 dina
(7,8132 jam)[6]
Kemiringan sumbu sekitar 78 ± 13°[7]
Albedo 0,159 (géomètrik)[8]
Suhu ~164 K
maks: ~265 K (-8 °C)
Kelas spektrum Asteroid tipe B[9]
Magnitudo tampak 6,4[10] tekan 10,6
Magnitudo mutlak (H) 4,13[8]
Ukuran sudut 0,59"[11] tekan 0,17"

2 Pallas (IPA: /ˈpæləs/, basa Yunani: Παλλάς) arupa asteroid gedhé sing ana ing sabuk asteroid sistem tata surya lan arupa asteroid ka-2 sing ditemokaké. Ditemokaké lan dijenengi déning astronom Heinrich Wilhelm Matthaus Olbers nalika tanggal 28 Maret 1802. 2 Pallas arupa salah siji saka 4 asteroid gedhé (1 Ceres, 4 Vesta, 10 Hygiea, lan 2 Pallas). Asteroid gedhé kasebut ora kalebu 704 Interamnia. Pallas duwé dhiamèter 530 km[2], luwih gedhé sethithik saka 4 Vesta.

Réferènsi[besut | besut sumber]

  1. ^ OED
  2. ^ a b c "JPL Small-Body Database Browser: 2 Pallas". Dijupuk 2009-09-12. 
  3. ^ "The MeanPlane (Invariable plane) of the Solar System passing through the barycenter". 2009-04-03. Diarsip saka asliné ing 2009-05-14. Dijupuk 2009-04-10.  (produced with Solex 10 written by Aldo Vitagliano; see also Invariable plane). Retrieved 2009-04-25.
  4. ^ a b Schmidt, B. E.; et al. (2008). "Hubble takes a look at Pallas: Shape, size, and surface" (PDF). 39th Lunar and Planetary Science Conference (Lunar and Planetary Science XXXIX). Held March 10–14, 2008, in League City, Texas. 1391: 2502. Dijupuk 2008-08-24. 
  5. ^ Baer, James; Steven R. Chesley (2008). "Astrometric masses of 21 asteroids, and an integrated asteroid ephemeris" (PDF). Celestial Mechanics and Dynamical Astronomy (Springer Science+Business Media B.V. 2007) 100 (2008): 27–42. Bibcode:2008CeMDA.100...27B. doi:10.1007/s10569-007-9103-8. Dijupuk 2008-11-11.  Cite nganggo paramèter lawas |coauthors= (pitulung)
  6. ^ Harris, A. W.; Warner, B. D.; Pravec, P.; Eds. (2006). "Asteroid Lightcurve Derived Data. EAR-A-5-DDR-Derived-Lightcurve-V8.0.". NASA Planetary Data System. Diarsip saka sing asli ing 2007-01-28. Dijupuk 2007-03-15.  Cite nganggo paramèter lawas |coauthors= (pitulung)
  7. ^ Torppa, J.; et al. (2003). "Shapes and rotational properties of thirty asteroids from photometric data". Icarus 164 (2): 346–383. Bibcode:2003Icar..164..346T. doi:10.1016/S0019-1035(03)00146-5. 
  8. ^ a b Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (2004). "IRAS Minor Planet Survey. IRAS-A-FPA-3-RDR-IMPS-V6.0.". NASA Planetary Data System. Diarsip saka sing asli ing 2007-03-11. Dijupuk 2007-03-15.  Cite nganggo paramèter lawas |coauthors= (pitulung)
  9. ^ Neese, C.; Ed. (2005). "Asteroid Taxonomy. EAR-A-5-DDR-Taxonomy-V5.0.". NASA Planetary Data System. Diarsip saka sing asli ing 2007-03-10. Dijupuk 2007-03-15.  Cite nganggo paramèter lawas |coauthors= (pitulung)
  10. ^ Menzel, Donald H.; Pasachoff, Jay M. (1983). A Field Guide to the Stars and Planets (2nd ed.). Boston, MA: Houghton Mifflin. k. 391. ISBN 0-395-34835-8. 
  11. ^ Calculated with JPL Horizons for 2014-Feb-24

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