astro.wikisort.org - Asteroid

Athalia (minor planet designation: 515 Athalia), provisional designation 1903 ME, is a carbonaceous Themistian asteroid from the outer regions of the asteroid belt, approximately 40 kilometers in diameter. It was discovered on 20 September 1903, by German astronomer Max Wolf at the Heidelberg Observatory in southwest Germany.[15] The asteroid was named after the ancient Judahite queen Athaliah.[3]

515 Athalia

Discovery [1]
Discovered by	M. F. Wolf
Discovery site	Heidelberg Obs.
Discovery date	20 September 1903
Designations
MPC designation	(515) Athalia
Pronunciation	/æθəˈlaɪə/[2]
Named after	Athaliah (ancient queen consort)[3]
Alternative designations	1903 ME · 1931 TQ 1937 WO · 1937 WQ 1937 WR · 1937 YH 1953 TD · 1974 QA3 1977 CF
Minor planet category	main-belt · (outer) Themis [4][5]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc	113.79 yr (41,562 days)
Aphelion	3.6671 AU
Perihelion	2.5797 AU
Semi-major axis	3.1234 AU
Eccentricity	0.1741
Orbital period (sidereal)	5.52 yr (2,016 days)
Mean anomaly	178.72°
Mean motion	0° 10m 42.96s / day
Inclination	2.0376°
Longitude of ascending node	121.11°
Argument of perihelion	300.16°
Physical characteristics
Dimensions	32.75±10.79 km[6] 33.47±10.06 km[7] 38.22 km (SIMPS)[4] 38.80±0.66 km[8] 39.76±1.38 km[9] 41.190±0.146 km[10] 43.0±0.2 km[11] 45.280±0.399 km[12]
Synodic rotation period	10.636±0.001 h[13]
Geometric albedo	0.0278±0.0045[12] 0.031±0.006[11] 0.037±0.003[9] 0.038±0.005[8] 0.039±0.004[10] 0.0390 (SIMPS)[4] 0.06±0.03[7] 0.07±0.11[6]
Spectral type	Tholen = no classification possible [1] SMASS = Cb [1] B–V = 0.875 [1] U–B = 0.415 [1]
Absolute magnitude (H)	10.6[11] · 10.76±0.26[14] · 10.89[6] · 11.23[1][4][7][8][9][12]

Orbit and classification

Athalia is a Themistian asteroid that belongs to the Themis family (602), a very large family of carbonaceous asteroids, named after 24 Themis.[4][5][16]^: 23 It orbits the Sun in the outer main belt at a distance of 2.6–3.7 AU once every 5 years and 6 months (2,016 days). Its orbit has an eccentricity of 0.17 and an inclination of 2°.[1] The body's observation arc begins at Heidelberg with its official discovery observation in 1903.[15]

Physical characteristics

Spectral type

In the SMASS classification, the asteroid is a Cb-subtype, that transitions between the carbonaceous C-type to the B-type asteroids.[1] In the Tholen classification, no type could be assigned to Athalia since its spectrum was inconsistent as it resembled that of an S-type asteroid, while its albedo was far too low for that spectral type.[1][17]

Rotation period

In October 2015, a rotational lightcurve of Athalia was obtained from photometric observations by American astronomer Frederick Pilcher at the Organ Mesa Observatory (G50) in New Mexico, United States. Lightcurve analysis gave a well-defined rotation period of 10.636 hours with a brightness amplitude of 0.22 magnitude (U=3).[13]

Diameter and albedo

According to the surveys carried out by the Japanese Akari satellite, the Spitzer Space Telescope and the Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Athalia measures about 40 kilometers in diameter and its surface has an albedo of about 0.03 to 0.04.[6][7][8][9][10][11][12]

The Collaborative Asteroid Lightcurve Link adopts the results obtained by the Infrared Astronomical Satellite IRAS, that is, an albedo of 0.039 and a diameter of 38.22 kilometers based on an absolute magnitude of 11.23.[4]

Naming

This minor planet was named after Athaliah (Athalia), the daughter of King Ahab and Queen Jezebel of Israel. The murderous queen of the ancient Kingdom of Judah was the only woman to ever rule the Hebrew kingdoms. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 55).[3]

References

External links

• 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
• 515 Athalia at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 515 Athalia at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

На других языках

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[de] (515) Athalia

(515) Athalia ist ein Asteroid des Hauptgürtels, der am 20. September 1903 vom deutschen Astronomen Max Wolf in Heidelberg entdeckt wurde.

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- [en] 515 Athalia

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[es] (515) Athalia

(515) Athalia es un asteroide perteneciente al cinturón de asteroides descubierto el 20 de septiembre de 1903 por Maximilian Franz Wolf desde el observatorio de Heidelberg-Königstuhl, Alemania. Está nombrado en honor de Atalía, reina de Judá del siglo IX a. C.[2] Forma parte de la familia asteroidal de Temis.[3]

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[ru] (515) Аталия

(515) Аталия (лат. Athalia) — астероид главного пояса, входящий в состав семейства Фемиды. Он был открыт 20 сентября 1903 года немецким астрономом Максом Вольфом в обсерватории Хайдельберг в Германии и назван в честь Аталии, царицы Иудейского царства[1].

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