astro.wikisort.org - Asteroid

1040 Klumpkea, provisional designation 1925 BD, is a Tirela asteroid from the outer regions of the asteroid belt, approximately 23 kilometers (14 miles) in diameter. It was discovered on 20 January 1925, by Russian–French astronomer Benjamin Jekhowsky at the Algiers Observatory in North Africa.[1] This highly elongated asteroid is the largest member of the stony Tirela family – also known as the Klumpkea family – and has a longer than average rotation period of 59.2 hours.[11] It was named after American astronomer Dorothea Klumpke.[2]

1040 Klumpkea

Shape model of Klumpkea from its lightcurve
Discovery[1]
Discovered by	B. Jekhovsky
Discovery site	Algiers Obs.
Discovery date	20 January 1925
Designations
MPC designation	(1040) Klumpkea
Named after	Dorothea Klumpke[2] (American astronomer)
Alternative designations	1925 BD · 1930 DC1 1936 BB
Minor planet category	main-belt[1][3] · (outer) Tirela[4]
Orbital characteristics[3]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc	93.10 yr (34,005 d)
Aphelion	3.7117 AU
Perihelion	2.5142 AU
Semi-major axis	3.1129 AU
Eccentricity	0.1923
Orbital period (sidereal)	5.49 yr (2,006 d)
Mean anomaly	4.1328°
Mean motion	0° 10m 46.2s / day
Inclination	16.688°
Longitude of ascending node	280.17°
Argument of perihelion	158.00°
Physical characteristics
Mean diameter	22.340±0.175 km[5][6] 22.669±0.304 km[7] 23.13±0.38 km[8] 34.98±4.3 km[9]
Synodic rotation period	59.2±0.1 h[10]
Geometric albedo	0.0630[9] 0.237[8] 0.2387[7] 0.245[5][6]
Spectral type	C (assumed)[11] S (possible)
Absolute magnitude (H)	10.40[5][7][8] 10.5[1][3][11] 10.9[9]

Orbit and classification

Klumpkea is the largest member of the Tirela family (612),[4] a large asteroid family of more than a thousand members which has been further divided into 8 different subclusters.[12]^: 18, 23 The family is named after 1400 Tirela. Alternatively it is also known as the Klumpkea family by Milani and Knežević.[13][14]

It orbits the Sun in the outer asteroid belt at a distance of 2.5–3.7 AU once every 5 years and 6 months (2,006 days; semi-major axis of 3.11 AU). Its orbit has an eccentricity of 0.19 and an inclination of 17° with respect to the ecliptic.[3] The body's observation arc begins at Algiers on its official discovery observation in January 1925.[1]

Naming

This minor planet was named after American astronomer Dorothea Klumpke (1861–1943), spouse of Welsh astronomer Isaac Roberts (1829–1904). Dorothea Klumpke was the first woman to receive the degree of Doctor of Mathematical Sciences at the Sorbonne University in Paris, France. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H99). The asteroid 339 Dorothea has also been named in her honor by its discoverer Max Wolf.[2]

Physical characteristics

Klumpkea's spectral type is uncertain. Although the overall spectral type of the Tirela/Klumpkea family is that of a stony S-type,[12]^: 23 which agrees with observations by the WISE/Akari surveys, the Collaborative Asteroid Lightcurve Link (CALL) assumes it to be a carbonaceous C-type asteroid, based on the low albedo measured by SIMPS (see below).[11]

Rotation period and pole

In February 2002, a rotational lightcurve of Klumpkea was obtained from seven consecutive nights of photometric observations by Robert Stephens at his Santana Observatory (646) in California. Lightcurve analysis was difficult and only gave a provisional rotation period of 59.2±0.1 hours with a high brightness amplitude of 0.77 magnitude (U=2), indicative of an elongated shape.[10]

In 2016, a modeled lightcurve gave a concurring sidereal period of 56.588±0.003 hours using data from the Uppsala Asteroid Photometric Catalogue, the Palomar Transient Factory survey, and individual observers (such as above), as well as sparse-in-time photometry from the NOFS, the Catalina Sky Survey, and the La Palma surveys (950). The study also determined a spin axis for Klumpkea of (172.0°, 48.0°) in ecliptic coordinates (λ, β).[15]

Diameter and albedo

According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Klumpkea measures between 22.34 and 34.98 kilometers in diameter and its surface has an albedo between 0.063 and 0.245.[5][6][7][8][9] CALL assumes a carbonaceous standard albedo of 0.057 and calculates a diameter of 44.22 kilometers based on an absolute magnitude of 10.5.[11]

References

External links

• Lightcurve Database Query (LCDB), at www.minorplanet.info
• Dictionary of Minor Planet Names, Google books
• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
• 1040 Klumpkea at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 1040 Klumpkea at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

На других языках

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[de] (1040) Klumpkea

(1040) Klumpkea ist ein Asteroid des Hauptgürtels, der am 20. Januar 1925 vom russischen Astronomen Beniamin Pawlowitsch Schechowski in Algier entdeckt wurde.

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- [en] 1040 Klumpkea

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