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 biHeinrich Wilhelm Olbers
Discovery dateMairch 28, 1802
Designations
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)
Eccentricity0.231
4.62 a (1685.87 d)
17.65 km/s
96.15°
Inclination34.841° tae Ecliptic
34.21° tae Invariable plane[2]
173.12°
310.15°
SatellitesNone
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
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
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 leebrar membership required.)
  2. "The MeanPlane (Invariable plane) of the Solar System passing through the barycenter". 3 Apryle 2009. Archived frae the original on 14 Mey 2009. Retrieved 10 Apryle 2009. 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 25 Juin 2014.
  4. a b "JPL Small-Body Database Browser: 2 Pallas". Retrieved 12 September 2009.
  5. "AstDyS-2 Pallas Synthetic Proper Orbital Elements". Department of Mathematics, University of Pisa, Italy. Retrieved 1 October 2011.
  6. a b 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 original (PDF) on 4 October 2008. Retrieved 24 August 2008. Unknown parameter |deadurl= ignored (help); Cite uses deprecated parameter |displayauthors= (help); Invalid |display-authors=9 (help)
  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 original on 28 Januar 2007. Retrieved 15 Mairch 2007.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. 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. Archived frae the original on 11 Mairch 2007. Retrieved 15 Mairch 2007.
  11. Neese, C., ed. (2005). "Asteroid Taxonomy. EAR-A-5-DDR-Taxonomy-V5.0". NASA Planetary Data System. Archived frae the original on 10 Mairch 2007. Retrieved 15 Mairch 2007.
  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