astro.wikisort.org - Asteroid

1033 Simona, provisional designation 1924 SM, is a stony Eoan asteroid from the outer regions of the asteroid belt, approximately 20 kilometers in diameter. The asteroid was discovered by George Van Biesbroeck in 1924, who named it after his daughter Simona.

1033 Simona

Discovery[1]
Discovered by	G. van Biesbroeck
Discovery site	Yerkes Obs.
Discovery date	4 September 1924
Designations
MPC designation	(1033) Simona
Named after	Simona Van Biesbroeck (discoverer's daughter)[2]
Alternative designations	1924 SM · 1937 CG
Minor planet category	main-belt · Eos[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc	80.76 yr (29,498 days)
Aphelion	3.3538 AU
Perihelion	2.6474 AU
Semi-major axis	3.0006 AU
Eccentricity	0.1177
Orbital period (sidereal)	5.20 yr (1,898 days)
Mean anomaly	268.12°
Mean motion	0° 11m 22.56s / day
Inclination	10.664°
Longitude of ascending node	188.95°
Argument of perihelion	217.96°
Physical characteristics
Dimensions	19.195±0.194 km[4] 20.247±0.260 km[5] 20.29±6.38 km[6] 23.72±1.70 km[7] 24.71 km (derived)[3]
Synodic rotation period	9.6 h[8] 10.07±0.06 h[9]
Geometric albedo	0.1050 (derived)[3] 0.12±0.10[6] 0.125±0.019[7] 0.1725±0.0201[5] 0.196±0.041[4]
Spectral type	S[3]
Absolute magnitude (H)	11.0[5][7] · 11.1[1][3][6]

Discovery

Simona was discovered on 4 September 1924, by Belgian–American astronomer George Van Biesbroeck at Yerkes Observatory in Wisconsin, United States.[10] On the following night, it was independently discovered by Soviet astronomer Sergey Belyavsky at Simeiz Observatory on the Crimean peninsula.[2] As an anomaly, the asteroid's astrometric discovery record from 1924, 1924 SM, is missing in the observational history table provided by the Minor Planet Center. The first given observation is from 30 August 1938, made at Heidelberg Observatory.[10]

Orbit and classifications

Simona is a member of the Eos family, a collisional outer-belt family of untypical stony asteroids. It orbits the Sun at a distance of 2.6–3.4 AU once every 5 years and 2 months (1,898 days). Its orbit has an eccentricity of 0.12 and an inclination of 11° with respect to the ecliptic.[1] The body's observation arc begins almost 13 years after its official discovery observation, with its identification 1937 CG at Uccle Observatory in February 1937.[10]

Physical characteristics

Lightcurves

In September 2007, photometric observations at the Oakley Observatory in Indiana, United States, gave a fragmentary lightcurve with a rotation period of 10.07 hours and a brightness variation of 0.15 magnitude (U=1+).[9]

Another fragmentary lightcurve of Simona was obtained by French amateur astronomer René Roy in August 2012. Lightcurve analysis gave a period of 9.6 hours with an amplitude of 0.02 magnitude (U=n.a.).[8]

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, Simona measures between 19.195 and 23.72 kilometers in diameter and its surface has an albedo between 0.12 and 0.196.[4][5][6][7] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.1050 and a diameter of 24.71 kilometers based on an absolute magnitude of 11.1.[3]

Naming

This minor planet was named after the discoverer's daughter Simona Titus (née Van Biesbroeck). The official naming citation was published by Paul Herget in The Names of the Minor Planets (H 98).[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
• 1033 Simona at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 1033 Simona at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

На других языках

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[de] (1033) Simona

(1033) Simona ist ein Asteroid des Hauptgürtels, der am 4. September 1924 vom belgischen Astronomen George Van Biesbroeck am Yerkes-Observatorium in Williams Bay, Wisconsin entdeckt wurde.

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- [en] 1033 Simona

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