astro.wikisort.org - Asteroid

1517 Beograd, provisional designation 1938 FD, is a dark Paduan asteroid from the central region of the asteroid belt, approximately 36 kilometers in diameter. It was discovered on 20 March 1938, by Serbian astronomer Milorad Protić at Belgrade Astronomical Observatory in Serbia.[14] It is named after the city Belgrade.[2]

1517 Beograd

Discovery[1]
Discovered by	M. B. Protić
Discovery site	Belgrade Obs.
Discovery date	20 March 1938
Designations
MPC designation	(1517) Beograd
Named after	Belgrade (capital city)[2]
Alternative designations	1938 FD · 1931 VF 1934 JF · 1935 ST 1942 CD · 1952 JG 1952 KM1 · 1971 VT 1978 EW6
Minor planet category	main-belt · (middle)[3] Padua[4][5]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc	85.34 yr (31,171 days)
Aphelion	2.8392 AU
Perihelion	2.5935 AU
Semi-major axis	2.7164 AU
Eccentricity	0.0452
Orbital period (sidereal)	4.48 yr (1,635 days)
Mean anomaly	159.08°
Mean motion	0° 13m 12.72s / day
Inclination	5.2774°
Longitude of ascending node	63.889°
Argument of perihelion	231.89°
Physical characteristics
Dimensions	30.97±9.33 km[6] 36.16±1.9 km (IRAS:20)[7] 37.90±0.48 km[8] 39.524±0.219 km[9] 42.003±0.213 km[10]
Synodic rotation period	6.943±0.004 h[11] 6.9490±0.0006 h[12]
Geometric albedo	0.0364±0.0021[10] 0.045±0.001[8] 0.0491±0.005 (IRAS:20)[7] 0.050±0.006[9] 0.07±0.03[6]
Spectral type	SMASS = X[1] · P[10] · X[3]
Absolute magnitude (H)	11.1[3][6][7][8][10] · 11.23±0.66[13]

Orbit and classification

Beograd is member of the mid-sized Padua family (507), an asteroid family named after 363 Padua and at least 25 million years old. It consists of mostly X-type asteroids, that were previously associated to 110 Lydia (the Padua family is therefore also known as Lydia family). Together with the Agnia family, the Padua family is the only other family to have most of its members in a nonlinear secular resonance configuration with more than 75% of its members in a z1 librating state.[4][5]

This asteroid orbits the Sun in the central main-belt at a distance of 2.6–2.8 AU once every 4 years and 6 months (1,635 days). Its orbit has an eccentricity of 0.05 and an inclination of 5° with respect to the ecliptic.[1] In 1931, Beograd was first identified as 1931 VF at Uccle Observatory, extending the body's observation arc by 7 years prior to its official discovery observation at Belgrade.[14]

Physical characteristics

Lightcurves

French amateur astronomer Laurent Bernasconi obtained a lightcurve of Beograd from photometric observations taken in March 2005. Light-curve analysis gave a rotation period of 6.943 hours with a brightness variation of 0.18 magnitude (U=2).[11] In April 2014, a lightcurve obtained by Vladimir Benishek at the discovering Belgrade Observatory gave a concurring period of 6.9490 hours with an amplitude of 0.23 magnitude (U=2).[12]

Diameter and albedo

According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Beograd measures between 30.97 and 42.00 kilometers in diameter, and its surface has an albedo between 0.036 and 0.07.[6][8][9][10]

The Collaborative Asteroid Lightcurve Link adopts the results from IRAS, that is, an albedo of 0.0491 and a diameter of 36.16 kilometers using an absolute magnitude of 11.1.[3][7]

Spectral type

Beograd is characterized as an X-type asteroid in the SMASS taxonomy, while NEOWISE classifies it as a reddish P-type asteroid due to its low albedo.[10]

Naming

This minor planet was named by the discoverer in honor of his native city and the capital of his country, Belgrade.[2] The official naming citation was published by the Minor Planet Center on 30 January 1964 (M.P.C. 2277).[15]

References

External links

• A multi-domain approach to asteroid families identification
• 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
• 1517 Beograd at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 1517 Beograd at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

На других языках

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[de] (1517) Beograd

(1517) Beograd ist ein Asteroid im Asteroidengürtel zwischen Mars und Jupiter. Er wurde am 28. März 1938 von dem Astronomen Milorad B. Protić entdeckt und von ihm nach seiner Geburtsstadt Belgrad benannt.[1] Sein Durchmesser beträgt etwa 36 km. Er hat mit dem Exzentrizitätswert 0,042 eine kleinere Exzentrizität. Die Neigung seiner Bahnebene von etwa 5° zur Referenzebene ist für seine Größe gering.

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- [en] 1517 Beograd

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