2 Pallas

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2 Pallas Pallas symbol.svg
PallasHST2007.jpg
An ultraviolet image o Pallas shawing its flattened shape, taken bi the Hubble Telescope
Discovery
Discovered bi Heinrich Wilhelm Olbers
Discovery date Mairch 28, 1802
Designations
Pronunciation /ˈpæləs/ PAL-əs
Named after
Pallas Athena
main belt
(Pallas faimily)
Adjectives Palladian /pæˈldiən/[1]
Orbital chairactereestics[3][4]
Epoch 2010-Jul-23 (JD 2455400.5)
Aphelion 3.412 AU (510.4 Gm)
Perihelion 2.132 AU (318.9 Gm)
2.772 AU (414.7 Gm)
Eccentricity 0.231
4.62 a (1685.87 d)
17.65 km/s
96.15°
Inclination 34.841° tae Ecliptic
34.21° tae Invariable plane[2]
173.12°
310.15°
Satellites None
Proper orbital elements[5]
2.7709176 AU
0.2812580
33.1988686°
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
Dimensions 582 × 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]
Albedo 0.159 (geometric)[10]
Temperatur ≈ 164 K
max: ≈ 265 K (−8 °C)
Spectral teep
B-type asteroid[11]
6.49[12] tae 10.65
4.13[10]
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 library 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.  (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 (PDF) frae the oreeginal on 4 October 2008. Retrieved 2008-08-24. 
  7. Baer first=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. Retrieved 2008-11-11. 
  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. 
  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. 
  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