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675 Ludmilla

Main-belt asteroid

Field	Value
minorplanet	yes
background	#D6D6D6
name	675 Ludmilla
image	675Ludmilla (Lightcurve Inversion).png
caption	A three-dimensional model of 675 Ludmilla based on its light curve
mpc_name	(675) Ludmilla
alt_names	1908 DU
discoverer	Joel Hastings Metcalf
discovered	30 August 1908
discovery_site	Taunton, Massachusetts
epoch	31 July 2016 (JD 2457600.5)
eccentricity	0.20120
semimajor	2.7729 AU
perihelion	2.2150 AU
aphelion	3.3308 AU
period	1686.5 days 4.62 yr (1686.5 d)
inclination	9.7796°
asc_node	263.200°
arg_peri	152.391°
mean_anomaly	98.9547°
mean_radius

mass
density
mean_motion	/ day
orbit_ref
observation_arc	98.67 yr (36039 d)
uncertainty	0
abs_magnitude	7.91
rotation	7.717 h
spectral_type	S

675 Ludmilla is a stony (S-type) minor planet orbiting the Sun. It was named after Mikhail Glinka's opera Ruslan and Lyudmila. This asteroid is orbiting at a distance of from the Sun with an orbital eccentricity of 0.20 and a period of 1686.5 days. The orbital plane is inclined at an angle of 9.8° to the plane of the ecliptic. 675 Ludmilla is spinning with a period of .

Mass and density

In 2012, a study by Benoît Carry gave a meta-estimate of a mass of for Ludmilla, based on a single study of its gravitational influence on other Solar System bodies. However, given Ludmilla's diameter of 67.7 km, this mass implies an extremely high density . Such a high density is unphysical, so this mass and density estimate of Ludmilla has been rejected by Carry. Because of Ludmilla's small size, its gravitational influence on other bodies is extremely difficult to detect and may lead to highly inaccurate mass and density estimates. A more recent study in 2019 determined a mass of for Ludmilla, which corresponds to a density of for a diameter of 67.7 km.

References

"675 Ludmilla (1908 DU)". [[NASA]]/[[Jet Propulsion Laboratory]].

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.

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