User:Dontuseurrealname/sandbox/5 Astraea (rewrite)

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5 Astraea
Lightcurve-based 3D-model of Astraea
Discovery[1]
Discovered byK. L. Hencke
Discovery siteDriesen Obs.
Discovery date8 December 1845
Designations
(5) Astraea
Pronunciation/æˈstriːə/[2]
Named after
Astraea (Greek goddess)[3]
1969 SE
main-belt[1][4] · (middle)
Astraea[5]
AdjectivesAstraean
SymbolThe historic planetary symbol for 5 Astraea (historical astronomical), The modern astrological symbol for 5 Astraea (modern astrological)
Orbital characteristics[4]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc171.93 yr (62,799 d)
Aphelion3.0659 AU
Perihelion2.0810 AU
2.5735 AU
Eccentricity0.1914
4.13 yr (1,508 d)
186.83°
0° 14m 19.32s / day
Inclination5.3677°
141.58°
358.75°
Proper orbital elements[6]
2.5761849 AU
0.1980486
4.5118628°
87.046396 deg / yr
4.13573 yr
(1510.574 d)
Precession of perihelion
52.210903 arcsec / yr
Precession of the ascending node
−57.357951 arcsec / yr
Physical characteristics
Dimensions167 km × 123 km × 82 km[7]
Mean diameter
119 km[7]
48 300 km2[8]
Volume882 000 km3[8]
Mass2.9×1018 kg[9][10]
(assumed)[11]
Mean density
~3.3 g/cm3
0.700 03 d (16.801 h)[7]
Equatorial rotation velocity
6.44 m/s[8]
0.227[12]
S
8.74 to 12.89
6.85
0.15" to 0.041"

Astraea (/æˈstriːə/) (minor planet designation: 5 Astraea) is an S-type asteroid located in the asteroid belt.

References[edit]

  1. ^ a b Cite error: The named reference MPC-object was invoked but never defined (see the help page).
  2. ^ "Astraea". Lexico UK English Dictionary. Oxford University Press. Archived from the original on 22 March 2020.
  3. ^ Cite error: The named reference springer was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference jpldata was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference AstDys-object was invoked but never defined (see the help page).
  6. ^ "AstDyS-2 Astraea Synthetic Proper Orbital Elements". Department of Mathematics, University of Pisa, Italy. Retrieved 1 October 2011.
  7. ^ a b c M. J. López-Gonzáles & E. Rodríguez Lightcurves and poles of seven asteroids, Planetary and Space Science, Vol. 53, p. 1147 (2005).
  8. ^ a b c Calculated based on the known parameters
  9. ^ Michalak, G. (2001). "Determination of asteroid masses". Astronomy & Astrophysics. 374 (2): 703–711. Bibcode:2001A&A...374..703M. doi:10.1051/0004-6361:20010731.
  10. ^ (Mass estimate of Astra 0.015 / Mass of Ceres 4.75) * Mass of Ceres 9.43E+20 = 2.977E+18
  11. ^ Michalak2001 (Table 6) assumed masses of perturbing asteroids used in calculations of perturbations of the test asteroids.
  12. ^ Cite error: The named reference SIMPS was invoked but never defined (see the help page).
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