2 Pallas

asteroid

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

2 Pallas  ⚴
Potw1749a Pallas crop.png
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)
Aphelion3,412 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 Babagan 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 sakiwa-tengené 78 ± 13°[7]
Albedo0,159 (géomètrik)[8]
Suhu ~164 K
maks: ~265 K (-8 °C)
Kelas spektrumAsteroid 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"

RéferènsiBesut

  1. OED
  2. a b c "JPL Small-Body Database Browser: 2 Pallas". Dibukak ing 2009-09-12.
  3. "The MeanPlane (Invariable plane) of the Solar System passing through the barycenter". 2009-04-03. Diarsip saka sing asli ing 2009-05-14. Dibukak ing 2009-04-10. Unknown parameter |deadurl= ignored (|url-status= suggested) (pitulung) (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. Dibukak ing 2008-08-24. Explicit use of et al. in: |author= (pitulung)
  5. Baer, James (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. Dibukak ing 2008-11-11. Unknown parameter |coauthors= ignored (|author= suggested) (pitulung)
  6. Harris, A. W. (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. Dibukak ing 2007-03-15. Unknown parameter |coauthors= ignored (|author= suggested) (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. Explicit use of et al. in: |author= (pitulung)
  8. a b Tedesco, E. F. (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. Dibukak ing 2007-03-15. Unknown parameter |coauthors= ignored (|author= suggested) (pitulung)
  9. Neese, C. (2005). "Asteroid Taxonomy. EAR-A-5-DDR-Taxonomy-V5.0". NASA Planetary Data System. Diarsip saka sing asli ing 2007-03-10. Dibukak ing 2007-03-15. Unknown parameter |coauthors= ignored (|author= suggested) (pitulung)
  10. Menzel, Donald H.; Pasachoff, Jay M. (1983). A Field Guide to the Stars and Planets (2nd ed.). Boston, MA: Houghton Mifflin. p. 391. ISBN 0-395-34835-8.CS1 maint: multiple names: authors list (link)
  11. Calculated with JPL Horizons for 2014-Feb-24

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