astro.wikisort.org - Asteroid

1136 Mercedes, provisional designation 1929 UA, is a background asteroid from the central regions of the asteroid belt, approximately 26 kilometers in diameter. It was discovered on 30 October 1929, by Catalan astronomer Josep Comas i Solà at the Fabra Observatory in Barcelona, Spain.[14] The asteroid was named for the sister-in-law of the discoverer.[2]

1136 Mercedes

Discovery[1]
Discovered by	J. Comas Solà
Discovery site	Fabra Obs.
Discovery date	30 October 1929
Designations
MPC designation	(1136) Mercedes
Named after	Mercedes[2] (discoverer's sister-in-law)
Alternative designations	1929 UA · 1966 XB
Minor planet category	main-belt · (middle) background[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc	86.23 yr (31,497 days)
Aphelion	3.2207 AU
Perihelion	1.9111 AU
Semi-major axis	2.5659 AU
Eccentricity	0.2552
Orbital period (sidereal)	4.11 yr (1,501 days)
Mean anomaly	171.68°
Mean motion	0° 14m 23.28s / day
Inclination	8.9825°
Longitude of ascending node	209.53°
Argument of perihelion	148.49°
Physical characteristics
Dimensions	25.23 km (derived)[4] 25.296±0.249 km[5] 26.29±6.21 km[6] 26.349±0.078 km[7] 26.66±0.28 km[8] 33.19±6.54 km[9]
Synodic rotation period	6.448±0.002 h[10] 15.6 h (poor)[11] 24.64±0.01 h[12]
Geometric albedo	0.05±0.04[9] 0.08±0.06[6] 0.084±0.015[5] 0.1007 (derived)[4] 0.1018±0.0230[7] 0.103±0.003[8]
Spectral type	S (assumed)[4]
Absolute magnitude (H)	11.00[7][8] · 11.10[4][6] · 11.2[1] · 11.22[9] · 11.68±0.75[13]

Orbit and classification

Mercedes is not a member of any known asteroid family and belongs to the belt's background population.[3] It orbits the Sun in the central main-belt at a distance of 1.9–3.2 AU once every 4 years and 1 month (1,501 days). Its orbit has an eccentricity of 0.26 and an inclination of 9° with respect to the ecliptic.[1] The body's observation arc begins at Yerkes Observatory in March 1931, more than a year after its official discovery observation at Fabra.[14]

Physical characteristics

Mercedes is an assumed S-type asteroid.[4]

Rotation period

The asteroid has an ambiguous rotation period. A lightcurve of Mercedes obtained in 1998, gave a period of 6.448 hours and a brightness variation of 0.10 magnitude (U=2),[10] while another lightcurve from 2007, gave a much longer period of 24.64 hours with an amplitude of 0.15 (U=2).[12] A third period of 15.6 hours is considered of poor quality (U=1).[11]

Diameter and albedo

According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Mercedes measures between 25.296 and 33.19 kilometers in diameter and its surface has an albedo between 0.05 and 0.103.[5][6][7][8][9]

The Collaborative Asteroid Lightcurve Link derives an albedo of 0.1007 and a diameter of 25.23 kilometers based on an absolute magnitude of 11.1.[4]

Naming

This minor planet was named by Josep Comas i Solà for his sister-in-law, Mercedes. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 106).[2]

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
• 1136 Mercedes at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 1136 Mercedes at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

На других языках

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[de] (1136) Mercedes

(1136) Mercedes ist ein Asteroid des Hauptgürtels, der am 30. Oktober 1929 vom katalanischen Astronomen José Comas Solá in Barcelona entdeckt wurde.

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- [en] 1136 Mercedes

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[es] (1136) Mercedes

(1136) Mercedes es un asteroide que forma parte del cinturón de asteroides y fue descubierto el 30 de octubre de 1929 por José Comas y Solá desde el observatorio Fabra de Barcelona, España.

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