astro.wikisort.org - Asteroid

1154 Astronomia, provisional designation 1927 CB, is a carbonaceous background asteroid from the outer regions of the asteroid belt, approximately 60 kilometers in diameter. It was discovered by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory on 8 February 1927.[14] The asteroid was named for the natural science of astronomy.

1154 Astronomia

Discovery[1]
Discovered by	K. Reinmuth
Discovery site	Heidelberg Obs.
Discovery date	8 February 1927
Designations
MPC designation	(1154) Astronomia
Pronunciation	/æstroʊˈnoʊmiə/
Named after	astronomy[2] (a natural science)
Alternative designations	1927 CB · A911 RA
Minor planet category	main-belt · (outer)[1][3] background[4]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc	105.83 yr (38,656 days)
Aphelion	3.6308 AU
Perihelion	3.1511 AU
Semi-major axis	3.3910 AU
Eccentricity	0.0707
Orbital period (sidereal)	6.24 yr (2,281 days)
Mean anomaly	22.461°
Mean motion	0° 9m 28.08s / day
Inclination	4.5323°
Longitude of ascending node	82.512°
Argument of perihelion	203.85°
Physical characteristics
Dimensions	55.4±5.5 km[5] 55.715±0.500 km[6] 57.253±0.339 km[7] 59±6 km[8] 59.68±18.01 km[9] 60.10±16.38 km[10] 61.08 km (SIMPS)[3][11] 64.20±1.11 km[12]
Synodic rotation period	18.1154±0.0139 h[lower-alpha 1]
Geometric albedo	0.028±0.001[12] 0.0296 (SIMPS)[3][11] 0.03±0.01[8] 0.03±0.02[9] 0.03±0.03[10] 0.0337±0.0060[7] 0.036±0.008[6] 0.04±0.01[5]
Spectral type	Tholen = FXU:[1][3] B–V = 0.658[1] U–B = 0.229[1]
Absolute magnitude (H)	10.46[10] · 10.51[1][3][5][7][8][9][12] · 10.80±0.10[13]

Orbit and classification

Astronomia is a background asteroid, that is, not a member of any known asteroid family.[4] It orbits the Sun in the outer main-belt at a distance of 3.2–3.6 AU once every 6 years and 3 months (2,281 days). Its orbit has an eccentricity of 0.07 and an inclination of 5° with respect to the ecliptic.[1]

The asteroid was first identified as A911 RA at Heidelberg in September 1911. The body's observation arc begins the night after its official discovery observation at Heidelberg.[14]

Physical characteristics

In the Tholen classification, Astronomia has an ambiguous spectral type, closest to a carbonaceous F-type and somewhat similar to that of an X-type asteroid. Its spectrum has also been flagged as unusual and of poor quality (FXU:).[1]

Rotation period

In May 2016, the first rotational lightcurve of Astronomia was obtained from photometric observations. Lightcurve analysis gave a rotation period of 18.1154 hours with a brightness variation of 0.39 magnitude (U=3-).[lower-alpha 1]

Diameter and albedo

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, Astronomia measures between 55.4 and 64.20 kilometers in diameter and its surface has an albedo between 0.028 and 0.04.[5][6][7][8][9][10][12]

The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is an albedo of 0.0296 and a diameter of 61.08 kilometers based on an absolute magnitude of 10.51.[3][11]

Naming

This minor planet was named after the natural science of astronomy, a study of celestial objects, observations and phenomena in the night sky. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 108).[2]

Notes

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
• 1154 Astronomia at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 1154 Astronomia at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

На других языках

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[de] (1154) Astronomia

(1154) Astronomia ist ein Asteroid des Hauptgürtels, der am 8. Februar 1927 von dem deutschen Astronomen Karl Wilhelm Reinmuth an der Landessternwarte Heidelberg-Königstuhl der Universität Heidelberg entdeckt wurde.

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- [en] 1154 Astronomia

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[es] (1154) Astronomia

(1154) Astronomia es un asteroide que forma parte del cinturón exterior de asteroides y fue descubierto por Karl Wilhelm Reinmuth desde el observatorio de Heidelberg-Königstuhl, Alemania, el 8 de febrero de 1927.

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[ru] (1154) Астрономия

(1154) Астрономия (лат. Astronomia) — астероид главного пояса, который был открыт 8 февраля 1927 года немецким астрономом Карлом Рейнмутом в обсерватории Хайдельберг и назван в честь астрономии, одной из древнейших наук, которая изучает движение, строение, происхождение и развитие небесных тел[1].

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