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511 Davida

Large asteroid in the asteroid belt

Field	Value
bgcolour	#D6D6D6
name	511 Davida
image	511 Davida VLT (2021), deconvolved.pdf
discoverer	R. S. Dugan
discovered	May 30, 1903
mpc_name	(511) Davida
alt_names	1903 LU
pronounced	, Latin Dāvīda
adjective	Davidian
named_after	David Peck Todd
mp_category	main-belt(outer)
Meliboea
orbit_ref
epoch	July 01, 2021
(JD 2459396.5, heliocentric)
aphelion	3.759 AU
perihelion	2.569 AU
semimajor	3.163 AU
eccentricity	0.188
period	5.626 yr (2055 d)
inclination	15.94°
asc_node	107.6°
arg_peri	337.2°
mean_anomaly	113°
mean_diameter
dimensions	(357 ± 2) × (294 ± 2) × (231 ± 50) km
flattening	0.30
mass
density

rotation	0.2137 d (5.130 h)
spectral_type	C
abs_magnitude	6.43
magnitude	9.50
title	Bright Minor Planets 2003
publisher	Minor Planet Center
url	http://www.cfa.harvard.edu/iau/Ephemerides/Bright/2003
access-date	2008-05-21
}}{{Dead link	date	April 2019	bot=InternetArchiveBot	fix-attempted=yes }}
albedo	geometric ( BV, )
single_temperature	~160 K

Meliboea (JD 2459396.5, heliocentric)

|access-date=2008-05-21 to 12.98

511 Davida is a large C-type asteroid in the asteroid belt. It is one of the largest asteroids; approximately tied for 7th place, to within measurement uncertainties, and the 5th or 6th most massive. It was discovered by R. S. Dugan in 1903. Davida is named after David Peck Todd, an astronomy professor at Amherst College.

Physical characteristics

3D model of Davida based on lightcurve modeling

Keck telescope image sequence of Davida showing its rotation

Davida is approximately 270–310 km in diameter and comprises an estimated 1.5% of the total mass of the asteroid belt. It is a C-type asteroid, which means that it is dark in colouring with a carbonaceous chondrite composition.

From 2002 to 2007, astronomers at the Keck Observatory used the Keck II telescope, which is fitted with adaptive optics, to photograph Davida. The asteroid is not a dwarf planet: there are at least two promontories and at least one flat facet with 15-km deviations from a best-fit ellipsoid. The facet is presumably a 150-km global-scale crater like the ones seen on 253 Mathilde. Conrad et al. (2007) show that craters of this size "can be expected from the impactor size distribution, without likelihood of catastrophic disruption of Davida."

Mass

In 2001, Michalak estimated Davida to have a mass of . In 2007, Baer and Chesley estimated Davida to have a mass of . , Baer suggests Davida has a mass of . This most recent estimate by Baer indicates that Davida is approximately tied with 704 Interamnia as the fifth-most-massive asteroid, though the error bars of Interamnia are large.

Composition

Davida's ore content is calculated to be large, and tops other asteroids in calculated worth, with 16 Psyche coming second with a large difference in hypothetical worth.

Occultations

There have been 9 occultation events observed since 1987, many of which produced two or three chords. Two examples shown here.

511 Davida occulted TYC 5597-01223 on 5 August 2016. Two observers recorded the event and both observed step events. Shown here is the step recording by Dave Herald.

Notes

References

|archive-url=https://archive.today/20121204183828/http://www.aanda.org/index.php?option=article&access=standard&Itemid=129&url=/articles/aa/abs/2001/29/aa10228/aa10228.html |url-status=dead |archive-date=2012-12-04 |access-date=2008-11-04 |doi-access=free

|access-date=2011-02-13 |archive-url=https://web.archive.org/web/20130702212735/http://home.earthlink.net/~jimbaer1/astmass.txt |archive-date=July 2, 2013 |url-status=dead

|access-date = 24 October 2019}}

References

John Daintith & William Gould, eds. (2006) ''The Facts On File Dictionary of Astronomy''. 5th edition. Infobase Publishing.
{{MW. Davidian
[https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=Davida JPL data] Retrieved 2021-09-29
P. Vernazza et al. (2021) VLT/SPHERE imaging survey of the largest main-belt asteroids: Final results and synthesis. ''Astronomy & Astrophysics'' 54, A56
{{val. 38. 2
Pitjeva, E. V.. (2005). "High-Precision Ephemerides of Planets—EPM and Determination of Some Astronomical Constants". Solar System Research.
Gamillo, Elizabeth. (January 4, 2022). "This Metal-Rich, Potato-Shaped Asteroid Could Be Worth $10 Quintillion".
"PDS Asteroid/Dust Subnode".

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

meliboea-asteroids discoveries-by-raymond-dugan named-minor-planets c-type-asteroids-(tholen) c-type-asteroids-(smass) 1903-in-science astronomical-objects-discovered-in-1903

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