2 Pallas

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2 Pallas Pallas symbol.svg
An ultraviolet image o Pallas shawing its flattened shape, taken bi the Hubble Telescope
Discovered biHeinrich Wilhelm Olbers
Discovery dateMairch 28, 1802
Pronunciation/ˈpæləs/ PAL-əs
Named after
Pallas Athena
main belt
(Pallas faimily)
AdjectivesPalladian /pæˈldiən/[1]
Orbital chairactereestics[3][4]
Epoch 2010-Jul-23 (JD 2455400.5)
Aphelion3.412 AU (510.4 Gm)
Perihelion2.132 AU (318.9 Gm)
2.772 AU (414.7 Gm)
4.62 a (1685.87 d)
17.65 km/s
Inclination34.841° tae Ecliptic
34.21° tae Invariable plane[2]
Proper orbital elements[5]
2.7709176 AU
78.041654 deg / yr
4.61292 yr
(1684.869 d)
Precession o perihelion
-1.335344 arcsec / yr
Precession of the ascending node
−46.393342 arcsec / yr
Pheesical chairacteristics
Dimensions582 × 556 × 500±18 km[6]
544 km (mean)[4]
Mass(2.11±0.26)×1020 kg[7]
Mean density
≈ 2.8 g/cm³[6]
≈ 0.18 m/s² / .018g
≈ 0.32 km/s
0.32555 d
(7.8132 h)[8]
likely 78°±13°[9]
Albedo0.159 (geometric)[10]
Temperatur≈ 164 K
max: ≈ 265 K (−8 °C)
Spectral teep
B-type asteroid[11]
6.49[12] tae 10.65
0.629″ tae 0.171″[13]

Pallas, minor-planet designation 2 Pallas, is the seicont asteroid tae hae been discovered (efter Ceres), an it is ane o the lairgest asteroids in the Solar Seestem.

References[eedit | eedit soorce]

  1. "Palladian". Oxford English Dictionary (3rd ed.). Oxford University Press. September 2005. (Subscription or UK public leebrar membership required.)
  2. "The MeanPlane (Invariable plane) of the Solar System passing through the barycenter". 2009-04-03. Archived frae the oreeginal on 2009-05-14. Retrieved 2009-04-10. Unknown parameter |deadurl= ignored (help) (produced with Solex 10 written by Aldo Vitagliano; see also Invariable plane). Retrieved 2009-04-25.
  3. "Introduction to astorb.dat". Ftp.lowell.edu. Retrieved 2014-06-25.
  4. 4.0 4.1 "JPL Small-Body Database Browser: 2 Pallas". Retrieved 2009-09-12.
  5. "AstDyS-2 Pallas Synthetic Proper Orbital Elements". Department of Mathematics, University of Pisa, Italy. Retrieved 2011-10-01.
  6. 6.0 6.1 Schmidt, B.E.; Thomas, P.C.; Bauer, J.M.; Li, J.-Y.; McFadden, L.A.; Parker, J.M.; Rivkin, A.S.; Russell, C.T.; Stern, S.A. (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. Bibcode:2008LPI....39.2502S. Archived frae the oreeginal (PDF) on 4 October 2008. Retrieved 2008-08-24. Unknown parameter |deadurl= ignored (help)CS1 maint: display-authors (link)
  7. Baer, James; Steven R. Chesley (2008). "Astrometric masses of 21 asteroids, and an integrated asteroid ephemeris". Celestial Mechanics and Dynamical Astronomy. 100 (2008): 27–42. Bibcode:2008CeMDA.100...27B. doi:10.1007/s10569-007-9103-8.
  8. 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. Archived frae the oreeginal on 2007-01-28. Retrieved 2007-03-15.CS1 maint: multiple names: eeditors leet (link)
  9. 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= (help)
  10. 10.0 10.1 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. Archived frae the oreeginal on 2007-03-11. Retrieved 2007-03-15.
  11. Neese, C., ed. (2005). "Asteroid Taxonomy. EAR-A-5-DDR-Taxonomy-V5.0". NASA Planetary Data System. Archived frae the oreeginal on 2007-03-10. Retrieved 2007-03-15.
  12. 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.
  13. Calculated with JPL Horizons for 1608-Feb-15