astro.wikisort.org - Asteroid

1784 Benguella, provisional designation 1935 MG, is a background asteroid from the inner regions of the asteroid belt, approximately 12 kilometers (7.5 miles) in diameter. It was discovered by South African astronomer Cyril Jackson at the Johannesburg Observatory on 30 June 1935.[1] It was named for the city of Benguela in Angola.[2] The low-numbered asteroid has been studied poorly.[4]

1784 Benguella

Discovery[1]
Discovered by	C. Jackson
Discovery site	Johannesburg Obs.
Discovery date	30 June 1935
Designations
MPC designation	(1784) Benguella
Named after	Benguela[2] (city in Angola)
Alternative designations	1935 MG · 1938 EX 1950 ON · 1950 QP 1951 YQ · 1953 FT 1957 JF · 1957 MH 1968 HY · 1969 UU1
Minor planet category	main-belt[1][3] · (inner) background[4][5]
Orbital characteristics[3]
Epoch 27 April 2019 (JD 2458600.5)
Uncertainty parameter 0
Observation arc	83.31 yr (30,430 d)
Aphelion	2.7242 AU
Perihelion	2.0858 AU
Semi-major axis	2.4050 AU
Eccentricity	0.1327
Orbital period (sidereal)	3.73 yr (1,362 d)
Mean anomaly	174.06°
Mean motion	0° 15m 51.48s / day
Inclination	1.4727°
Longitude of ascending node	95.271°
Argument of perihelion	184.89°
Physical characteristics
Mean diameter	10.480±0.100 km[6] 11.80±0.41 km[7] 16.68±1.3 km[8]
Geometric albedo	0.0763±0.014[8] 0.156±0.012[7] 0.237±0.045[6]
Absolute magnitude (H)	12.2[1][3] 12.30[7][8]

Orbit and classification

According to modern HCM-analyses, Benguella is a non-family asteroid from the main belt's background population.[4][5] It orbits the Sun in the inner asteroid belt at a distance of 2.1–2.7 AU once every 3 years and 9 months (1,362 days; semi-major axis of 2.41 AU). Its orbit has an eccentricity of 0.13 and an inclination of 1° with respect to the ecliptic.[3] The body's observation arc begins with its official discovery observation at Johannesburg in June 1935.[1]

Naming

This minor planet was named after Angola's city and chief port Benguela (São Felipe de Benguela), formerly spelled Benguella.[2] The official naming citation was published by the Minor Planet Center on 1 February 1980 (M.P.C. 5183).[9]

Physical characteristics

Benguella's spectral type is unknown,[4] with no assumptions possible based on the asteroid's albedo (see below)

As of 2018, no rotational lightcurve of Benguella has been obtained from photometric observations. The body's rotation period, pole and shape remain unknown.[4][10] 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, Benguella measures between 10.48 and 16.68 kilometers in diameter and its surface has an albedo between 0.076 and 0.24.[6][7][8]

References

External links

• Dictionary of Minor Planet Names, Google books
• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
• 1784 Benguella at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 1784 Benguella at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

На других языках

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[de] (1784) Benguella

(1784) Benguella ist ein Asteroid des Hauptgürtels, der am 30. Juni 1935 vom südafrikanischen Astronomen Cyril V. Jackson in Johannesburg entdeckt wurde.

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- [en] 1784 Benguella

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