46 Hestia (pronounced /ˈhɛstiə/) is a large, dark Main belt asteroid. It is also the primary body of the Hestia asteroid clump. It was discovered by N. R. Pogson on August 16, 1857 and is named after Hestia, Greek goddess of the hearth.
Mass
In 2000, Michalak estimated Hestia to have a mass of 3.5 × 1018 kg.[2][3]
Even though Hestia is only about 124 km in diameter,[1] in 1997, Bange and Bec-Borsenberger estimated Hestia as having a mass of 2.1 × 1019 kg, based on a perturbation by 19 Fortuna.[4][5][6] This older 1997 estimate would give Hestia a density of 14+ g/cm³[4] and make Hestia more massive than several much larger asteroids.
References
1. ^ a b c d e f "JPL Small-Body Database Browser: 46 Hestia". 2008-06-28 last obs. http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=46. Retrieved 2008-11-10.
2. ^ a b Michalak, G. (2001). "Determination of asteroid masses". Astronomy & Astrophysics 374: 703–711. doi:10.1051/0004-6361:20010731. http://www.aanda.org/index.php?option=article&access=standard&Itemid=129&url=/articles/aa/abs/2001/29/aa10228/aa10228.html. Retrieved 2008-11-10.
3. ^ (2000 mass estimate of 46 Hestia 0.018 / Mass of Ceres 4.75) * Mass of Ceres 9.43E+20 = 3.573E+18
4. ^ a b Bange, J.F; A. Bec-Borsenberger (1997). DETERMINATION OF THE MASSES OF MINOR PLANETS. pp. 169. http://www.rssd.esa.int/Hipparcos/venice-proc/poster02_22.pdf. Retrieved 2008-11-10.
5. ^ Baer, James; Steven R. Chesley (2007). "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. doi:10.1007/s10569-007-9103-8. http://www.springerlink.com/content/h747307j43863228/fulltext.pdf. Retrieved 2008-11-10.
6. ^ (Older mass estimate of Hestia 0.109 / Mass of Ceres 4.75) * Mass of Ceres 9.43E+20 = 2.163E+19