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46 Hestia

Main-belt asteroid

Field	Value
minorplanet	yes
background	#D6D6D6
image	000046-asteroid shape model (46) Hestia.png
caption	3D convex shape model of 46 Hestia
name	46 Hestia
discoverer	Norman Robert Pogson
discovered	August 16, 1857
mpc_name	(46) Hestia
pronounced
named_after	Hestia
mp_category	main belt
orbit_ref
epoch	December 31, 2006 (JD 2454100.5)
semimajor	2.526 AU (377.811 million km)
perihelion	2.091 AU (312.736 million km)
aphelion	2.961 AU (442.886 million km)
eccentricity	0.172
period	4.01 a (1465.958 d)
inclination	2.342°
asc_node	181.168°
arg_peri	176.882°
mean_anomaly	45.401°
dimensions	124.1 km
mass	3.5 kg
density	5.81 ± 0.87 g/cm3
rotation	21.04 h
spectral_type	C
abs_magnitude	8.36
albedo	0.052

46 Hestia is a large, dark main-belt asteroid. It is also the primary body of the Hestia clump, a group of asteroids with similar orbits.

Hestia was discovered by N. R. Pogson on August 16, 1857, at the Radcliffe Observatory, Oxford. Pogson awarded the honour of naming it to William Henry Smyth, the previous owner of the telescope used for the discovery. Smyth chose to name it after Hestia, Greek goddess of the hearth. This created a problem in Greek, where 4 Vesta also goes by the name Hestia.

The computed Lyapunov time for this asteroid is 30,000 years, indicating that it occupies a chaotic orbit that will change randomly over time because of gravitational perturbations of the planets.

Hestia has been studied by radar.{{cite web |access-date=2011-10-30}} 13-cm radar observations of this asteroid from the Arecibo Observatory between 1980 and 1985 were used to produce a diameter estimate of 131 km. In 1988 a search for satellites or dust orbiting this asteroid was performed using the UH88 telescope at the Mauna Kea Observatories, but the effort came up empty.

Properties

Photometric observations made in 2012 at the Organ Mesa Observatory in Las Cruces, New Mexico produced a light curve with a period of 21.040 ± 0.001 hours. There are two brightness minima, having luminosity variations of 0.05 and 0.12 in magnitude, respectively.{{cite journal

In 2000, Michalak estimated Hestia to have a mass of 3.5 kg.{{cite journal |doi-access=free

Even though Hestia is only about 124 km in diameter, in 1997, Bange and Bec-Borsenberger estimated Hestia as having a mass of 2.1 kg, based on a perturbation by 19 Fortuna.{{cite conference |book-title=Proceedings of the ESA Symposium `Hipparcos - Venice '97', 13–16 May, Venice, Italy, ESA SP-402 (July 1997) |publication-date=August 1997 |bibcode=1997ESASP.402..169B |url-status=dead|archive-url=https://web.archive.org/web/20041231180421/http://www.rssd.esa.int/Hipparcos/venice-proc/poster02_22.pdf|archive-date=2004-12-31 |access-date=2008-11-10 }}{{cite journal

References

{{dict.com. Hestia
Schmadel, Lutz. (2003). "Dictionary of minor planet names". Springer.
(2000 mass estimate of 46 Hestia 0.018 / Mass of Ceres 4.75) * [[Ceres (dwarf planet)
(Older mass estimate of Hestia 0.109 / Mass of Ceres 4.75) * [[Ceres (dwarf planet)

Info: Wikipedia Source

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