astro.wikisort.org - Asteroid

666 Desdemona is a stony asteroid from the middle region of the asteroid belt, approximately 29 kilometers in diameter. It was discovered on 23 July 1908, by German astronomer August Kopff at Heidelberg Observatory in southern Germany, and named after Desdemona, character in Shakespeare's The Tragedy of Othello, the Moor of Venice. The name may have been inspired by the asteroid's provisional designation 1908 DM.[3][12]

666 Desdemona

Discovery [1]
Discovered by	A. Kopff
Discovery site	Heidelberg Obs.
Discovery date	23 July 1908
Designations
MPC designation	(666) Desdemona
Pronunciation	/dɛzdɪˈmoʊnə/[2]
Named after	Desdemona (character in Othello) [3]
Alternative designations	1908 DM
Minor planet category	main-belt · (middle)
Orbital characteristics [1]
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 0
Observation arc	107.90 yr (39,410 days)
Aphelion	3.2102 AU
Perihelion	1.9755 AU
Semi-major axis	2.5928 AU
Eccentricity	0.2381
Orbital period (sidereal)	4.18 yr (1,525 days)
Mean anomaly	309.91°
Mean motion	0° 14m 9.96s / day
Inclination	7.5856°
Longitude of ascending node	215.41°
Argument of perihelion	174.16°
Physical characteristics
Dimensions	27.04±1.0 km (IRAS:17)[4] 27.22 km (derived)[5] 27.37±0.71 km[6] 31.485±0.116 km[7] 32.74±0.37 km[8]
Mean radius	13.52±0.5 km
Synodic rotation period	9.6 h[9][lower-alpha 1] 14.607±0.004 h[10] 15.45±0.01 h[11]
Geometric albedo	0.095±0.015[8] 0.1026±0.0207[7] 0.105±0.006[6] 0.1055±0.008 (IRAS:17)[4] 0.1372 (derived)[5]
Spectral type	S [5]
Absolute magnitude (H)	10.6[1][5][7][8] · 10.90[4][6]

Classification and orbit

Desdemona is a stony S-type asteroid that orbits the Sun in the middle main-belt at a distance of 2.0–3.2 AU once every 4 years and 2 months (1,525 days). Its orbit has an eccentricity of 0.24 and an inclination of 8° with respect to the ecliptic.[1] As no precoveries were taken, the asteroid's observation arc begins with its official discovery observation at Heidelberg.[12]

Physical characteristics

Rotation period

In 2013, a rotational lightcurve for this asteroid was obtained from photometric observations made by astronomer Anna Marciniak at Poznań Observatory, Poland. It gave a rotation period of 14.607±0.004 hours with a brightness variation of 0.22 in magnitude (U=2+),[10] superseding a period from in 2000, obtained at the Californian Santana Observatory (646), which gave a slightly longer period of 15.45±0.01 hours and an amplitude of 0.11 (U=2).[11]

Between 2004 and 2006, three more lightcurves were constructed from photometric observations, but they were all fragmentary and based on results with less than full coverage (U=2-/1+/2-).[9][lower-alpha 1]

Diameter and albedo

According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer (WISE) with its subsequent NEOWISE mission, the asteroid's surface has an albedo between 0.095 and 0.106. While the Collaborative Asteroid Lightcurve Link agrees with the space-based IRAS and Akari surveys on a diameter of approximately 27 kilometers, the results from WISE and NEOWISE found a larger diameter of 31.5 to 32.7 kilometers, respectively.[4][5][6][7][8]

Naming

This minor planet was named after Desdemona, the wife of Othello in the play The Tragedy of Othello, the Moor of Venice written by William Shakespeare in 1604 (also see 2985 Shakespeare). It is presumed that the naming of "Desdemona" could have been inspired by the two letters of its provisional designation (1908 DM). One of the satellites of Uranus (Uranus X), discovered by the Voyager 2 in 1986, is also named Desdemona (H 68).[3]

Notes

References

External links

• Photométrie des astéroïdes et effets de sélection Stéphane Fauvaud: rotation period of (666) Desdemona, slide #12
• Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
• Dictionary of Minor Planet Names, Google books
• Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
• 666 Desdemona at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 666 Desdemona at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

На других языках

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[de] (666) Desdemona

(666) Desdemona ist ein Asteroid des Hauptgürtels, der am 23. Juli 1908 vom deutschen Astronomen August Kopff in Heidelberg entdeckt wurde.

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- [en] 666 Desdemona

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[es] (666) Desdemona

(666) Desdemona es un asteroide perteneciente al cinturón de asteroides descubierto el 23 de julio de 1908 por August Kopff desde el observatorio de Heidelberg-Königstuhl, Alemania. Está nombrado por Desdémona, esposa de Otelo en la tragedia de este nombre de William Shakespeare.[2]

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[ru] (666) Дездемона

(666) Дездемона (итал. Desdemona) — астероид главного пояса, который относится к светлому спектральному классу S[2]. Он был открыт 23 июля 1908 года германским астрономом Августом Копффом в Гейдельбергской обсерватории и назван в честь героини трагедии Уильяма Шекспира «Отелло» (по одной версии, полученный первоначальный индекс 1908 DM дал астрономам наводку для выбора имени)[9].

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