astro.wikisort.org - Asteroid

1259 Ógyalla, provisional designation 1933 BT, is a Themistian asteroid from the outer region of the asteroid belt, approximately 32 kilometers in diameter. It was discovered on 29 January 1933, by German astronomer Karl Reinmuth at Heidelberg Observatory in southwest Germany.[13] The asteroid was named for the Hurbanovo Observatory (551).[2]

1259 Ógyalla

Discovery[1]
Discovered by	K. Reinmuth
Discovery site	Heidelberg Obs.
Discovery date	29 January 1933
Designations
MPC designation	(1259) Ógyalla
Named after	Hurbanovo Observatory (551) (formerly O'Gyalla Observatory)[2]
Alternative designations	1933 BT · 1928 DJ1 1928 FO · 1929 MA 1935 QE1 · 1949 YN 1956 JF
Minor planet category	main-belt · Themis[3][4]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc	89.36 yr (32,640 days)
Aphelion	3.5000 AU
Perihelion	2.7064 AU
Semi-major axis	3.1032 AU
Eccentricity	0.1279
Orbital period (sidereal)	5.47 yr (1,997 days)
Mean anomaly	94.460°
Mean motion	0° 10m 49.08s / day
Inclination	2.3810°
Longitude of ascending node	75.001°
Argument of perihelion	149.89°
Physical characteristics
Dimensions	26.59±7.87 km[5] 31.32±1.13 km[6] 33.13±1.6 km[7] 33.31 km (derived)[3] 36.111±0.510 km[8] 39.484±0.440 km[9]
Synodic rotation period	12 h (dated)[10] 17.2669±0.1183 h (S)[11] 17.3038±0.0573 h (R)[11] 17.334±0.004 h[12]
Geometric albedo	0.0451±0.0103[9] 0.0641±0.007[7] 0.066±0.019[8] 0.072±0.006[6] 0.0916 (derived)[3] 0.10±0.05[5]
Spectral type	S[3]
Absolute magnitude (H)	10.349±0.002 (R)[11] · 10.6[1][3] · 10.64[5] · 10.678±0.003 (S)[11] · 11.0[6][7][9]

Orbit and classification

Ógyalla is a member of the Themis family, the 9th largest main-belt asteroid family of nearly 5,000 asteroids with nearly coplanar ecliptical orbits.[4] It orbits the Sun in the outer main-belt at a distance of 2.7–3.5 AU once every 5 years and 6 months (1,997 days). Its orbit has an eccentricity of 0.13 and an inclination of 2° with respect to the ecliptic.[1] It was first identified as 1928 DJ₁ and 1928 FO at the discovering observatory in 1928, extending the asteroid's observation arc by 5 years prior to its official discovery observation.[13]

Physical characteristics

Rotation period

A rotational lightcurve of Ógyalla was obtained by the Spanish Photometric Asteroid Analysis Group (OBAS) in June 2016. Light curve analysis gave a well-defined rotation period of 17.334 hours with a brightness variation of 0.41 magnitude (U=3).[12] In September 2012, photometric observations at the Palomar Transient Factory gave a period of 17.2669 and 17.3038 hours with an amplitude of 0.27 and 0.25 in the R- and S-band, respectively (U=2/2).[11]

The first lightcurve was already obtained in 1974, by Swedish astronomer Claes-Ingvar Lagerkvist at Uppsala Observatory from photographic photometry, but it was only fragmentary and gave a tentative period of 12 hours (U=1).[10]

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, Ógyalla measures between 26.59 and 36.11 kilometers in diameter, and its surface has an albedo between 0.064 and 0.10 (without preliminary results).[5][6][7][8] The Collaborative Asteroid Lightcurve Link (CALL) derives an albedo of 0.0916 and a diameter of 33.31 kilometers based on an absolute magnitude of 10.6. CALL also classifies it as a stony S-type asteroid (as it does with all Themistians).[3]

Naming

This minor planet was named for the Hurbanovo Observatory (IAU code: 551; formerly known as O'Gyalla Observatory), a seismological, meteorological and astronomical observatory in the former Hungarian city of Ógyalla. Since 1948, the city belongs to Slovakia and is now known as Hurbanovo.[2] The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 116).[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
• 1259 Ógyalla at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 1259 Ógyalla at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

На других языках

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[de] (1259) Ógyalla

(1259) Ógyalla ist ein Asteroid des Hauptgürtels, der am 29. Januar 1933 vom deutschen Astronomen Karl Wilhelm Reinmuth in Heidelberg entdeckt wurde.

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- [en] 1259 Ógyalla

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[ru] (1259) Одьялла

(1259) Одьялла (венг. Ógyalla) — астероид главного пояса, который был открыт 29 января 1933 года немецким астрономом Карлом Рейнмутом в обсерватории Хайдельберг в Германии. Астероид назван в честь астрономической, метеорологической и сейсмологической обсерватории в бывшем венгерском (ныне словацком) городе Одьялла (Гурбаново)[1].

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