astro.wikisort.org - Asteroid

647 Adelgunde, provisional designation 1907 AD, is a stony asteroid from the inner regions of the asteroid belt, approximately 13 kilometers in diameter. It was discovered on 11 September 1907, by German astronomer August Kopff at Heidelberg Observatory in southern Germany.[10] The origin of the asteroid's name is unknown,[2] it may be derived from the name of Princess Adelgunde of Bavaria.

647 Adelgunde

Discovery [1]
Discovered by	A. Kopff
Discovery site	Heidelberg Obs.
Discovery date	11 September 1907
Designations
MPC designation	(647) Adelgunde
Named after	unknown [2]
Alternative designations	1907 AD · 1930 SA 1949 YJ · 1960 PA
Minor planet category	main-belt · (inner) [3]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc	109.79 yr (40,102 days)
Aphelion	2.9166 AU
Perihelion	1.9659 AU
Semi-major axis	2.4412 AU
Eccentricity	0.1947
Orbital period (sidereal)	3.81 yr (1,393 days)
Mean anomaly	237.76°
Mean motion	0° 15m 30.24s / day
Inclination	7.3311°
Longitude of ascending node	254.68°
Argument of perihelion	175.79°
Physical characteristics
Dimensions	9.725±0.092[4] 9.769±0.108 km[5] 9.93±0.59 km[6] 13.69±0.76 km[7] 15.52 km (calculated)[3]
Synodic rotation period	32.202±0.007 h[8]
Geometric albedo	0.20 (assumed)[3] 0.257±0.031[7] 0.488±0.105[6] 0.508±0.040[4] 0.5143±0.0862[5]
Spectral type	Tholen = X [1] · S [3] B–V = 0.719[1] U–B = 0.297[1]
Absolute magnitude (H)	10.89±0.57[9] · 11.41[1][3][5][6][7]

Orbit and classification

Adelgunde orbits the Sun in the inner main-belt at a distance of 2.0–2.9 AU once every 3 years and 10 months (1,393 days). Its orbit has an eccentricity of 0.19 and an inclination of 7° with respect to the ecliptic.[1] As no precoveries were taken, Adelgunde's observation arc begins with its official discovery observation.[10]

Physical characteristics

Diameter and albedo

According to the space-based observations by NASA's Wide-field Infrared Survey Explorer and its subsequent NEOWISE mission, Adelgunde measures between 9.72 and 9.93 kilometers in diameter, and its surface has a high albedo of 0.488–0.514.[4][5][6]

Based on the survey carried out by the Japanese Akari satellite, it measures 13.7 kilometers with an albedo of 0.26.[7] The Collaborative Asteroid Lightcurve Link (CALL) agrees with the results obtained by AKARI, assumes a standard albedo for stony asteroids of 0.20, and calculates a diameter of 15.5 kilometers with an absolute magnitude of 11.41.[3] As the diameters are typically inferred from the body's absolute brightness and its reflectively, a higher albedo results in a smaller diameter.

Spectral type

Adelgunde is an X-type asteroid on the Tholen taxonomic scheme,[1] while CALL assumes it to be a stony S-type asteroid.[3]

Rotation period

In August 2006, a rotational lightcurve of Adelgunde was obtained from photometric observations by astronomers Pierre Antonini and Antonio Vagnozzi. Lightcurve analysis gave a well-defined rotation period of 32.202 hours with a brightness variation of 0.28 in magnitude (U=3).[8]

Name

The origin of this minor planet's name is unknown.[2] It is speculated that the name comes from a list created in 1913 by the Astronomisches Rechen-Institut (ARI) containing suggestions of female names from history and mythology for the naming of minor planets. At the time, the naming process was not well developed and the ARI feared inconsistencies and potential confusion. The list was sent to several German astronomers, including Kopff, with the invitation to name all of their made discoveries up to number 700.[11]

Unknown meaning

Among the many thousands of named minor planets, Adelgunde is one of 120 asteroids, for which no official naming citation has been published. All of these low-numbered asteroids have numbers between 164 Eva and 1514 Ricouxa and were discovered between 1876 and the 1930s, predominantly by astronomers Auguste Charlois, Johann Palisa, Max Wolf and Karl Reinmuth (also see category).[12]

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

На других языках

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[de] (647) Adelgunde

(647) Adelgunde ist ein Asteroid des Hauptgürtels, der am 11. September 1907 vom deutschen Astronomen August Kopff in Heidelberg entdeckt wurde.

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- [en] 647 Adelgunde

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[es] (647) Adelgunde

(647) Adelgunde es un asteroide perteneciente al cinturón de asteroides descubierto el 11 de septiembre de 1907 por August Kopff desde el observatorio de Heidelberg-Königstuhl, Alemania. Se desconoce la razón del nombre.[2]

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[ru] (647) Адельгунда

(647) Адельгунда (нем. Adelgunde) — астероид главного пояса, который относится к спектральному классу X. Он был открыт 11 сентября 1907 года немецким астрономом Августом Копффом в Гейдельбергской обсерватории. Точное происхождение названия неизвестно[7]. Предположительно он может быть назван в честь Адельгунды Марии Августы Терезы, принцессы Баварской.

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