1218 Aster

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1218 Aster
001218-asteroid shape model (1218) Aster.png
Shape model of Aster from its lightcurve
Discovery [1]
Discovered by K. Reinmuth
Discovery site Heidelberg Obs.
Discovery date29 January 1932
Designations
(1218) Aster
Pronunciation /ˈæstər/ [2]
Named after
 Aster (genus of flowers) [3]
1932 BJ ·1978 TJ5
1978 VQ12
main-belt  ·(inner)
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 85.35 yr (31,173 days)
Aphelion 2.5110 AU
Perihelion 2.0158 AU
2.2634 AU
Eccentricity 0.1094
3.41 yr (1,244 days)
56.714°
0° 17m 21.84s / day
Inclination 3.1572°
63.820°
69.372°
Physical characteristics
Dimensions5.554±0.084 km [4]
0.332±0.043 [4]
13.2 [1]

    1218 Aster, provisional designation 1932 BJ, is a bright asteroid from the inner regions of the asteroid belt, approximately 5.5 kilometers in diameter. Discovered by Karl Reinmuth in 1932, it was later named after the flowering plant Aster.

    Contents

    Discovery

    Aster was discovered on 29 January 1932, by German astronomer Karl Reinmuth at Heidelberg Observatory in southern Germany. [5] Two nights later, it was independently discovered by Italian astronomer Mario A. Ferrero at the Pino Torinese Observatory at Turin, Italy. [3]

    Classification and orbit

    Aster orbits the Sun in the inner main-belt at a distance of 2.0–2.5  AU once every 3 years and 5 months (1,244 days). Its orbit has an eccentricity of 0.11 and an inclination of 3° with respect to the ecliptic. [1]

    The asteroid's observation arc begins at the discovering observatory, one week after its official discovery observation. [5]

    Physical characteristics

    Diameter and albedo

    According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Aster measures 5.554 kilometers in diameter and its surface has an albedo of 0.332. [4]

    Lightcurves

    As of 2017, rotational lightcurve of Aster has been obtained. [6] The body's rotation period, shape and variation in magnitude shifted from unknown movements [1] [7] to specific identifiable spin/shape determinations.

    Naming

    The minor planet was named after the genus of flowers, Aster (also see List of minor planets named after animals and plants § Plants). The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 ( H 113 ). [3]

    Related Research Articles

    942 Romilda is a background asteroid, approximately 36 kilometers in diameter, located in the outer region of the asteroid belt. It was discovered by German astronomer Karl Reinmuth at the Heidelberg Observatory on 11 October 1920. The assumed C-type asteroid has a rotation period of 6.97 hours. It was named "Romilda", a common German female name unrelated to the discoverer's contemporaries, that was taken from the almanac Lahrer Hinkender Bote.

    1043 Beate, provisional designation 1925 HB, is a stony asteroid from the outer region of the asteroid belt, approximately 32 kilometers in diameter. It was discovered by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory on 22 April 1925. Any reference of its name to a person is unknown.

    1047 Geisha, provisional designation 1924 TE, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 11 kilometers in diameter. It was discovered on 17 November 1924, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany. The asteroid was named after the British musical The Geisha.

    1049 Gotho, provisional designation 1925 RB, is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 53 kilometers in diameter. It was discovered on 14 September 1925, by German astronomer Karl Reinmuth at Heidelberg Observatory in southwest Germany. Although the name of the asteroid is a masculine German name, it is not known to refer to a particular individual.

    1100 Arnica, provisional designation 1928 SD, is a Koronian asteroid from the outer regions of the asteroid belt, approximately 17 kilometers in diameter. It was discovered by Karl Reinmuth at the Heidelberg Observatory in 1928 and named after the herbaceous plant Arnica. The asteroid is likely of stony composition and has a rotation period of 14.535 hours.

    1138 Attica, provisional designation 1929 WF, is an asteroid from the outer region of the asteroid belt, approximately 24 kilometers in diameter. It was discovered on 22 November 1929, by German astronomer Karl Reinmuth at Heidelberg Observatory in southwest Germany. It was named after the Attica Province in Greece.

    1161 Thessalia, provisional designation 1929 SF, is a dark background asteroid from the outer regions of the asteroid belt, approximately 21 kilometers in diameter. It was discovered on 29 September 1929, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory. It was named for the Greek region Thessaly.

    2500 Alascattalo, provisional designation 1926 GC, is a stony Flora asteroid from the inner regions of the asteroid belt, approximately 8 kilometers in diameter.

    <span class="mw-page-title-main">1457 Ankara</span> Stony asteroid from the central region of the asteroid belt

    1457 Ankara, provisional designation 1937 PA, is a stony asteroid from the central region of the asteroid belt, approximately 18 kilometers in diameter. It was discovered on 3 August 1937, by German astronomer Karl Reinmuth at Heidelberg Observatory in southwest Germany, and later named for the Turkish capital city of Ankara.

    1215 Boyer, provisional designation 1932 BA, is a stony Eunomian asteroid from the central region of the asteroid belt, approximately 20 kilometers in diameter. It was discovered by astronomer Alfred Schmitt in 1932, who named it after French astronomer and college Louis Boyer.

    1707 Chantal, provisional designation 1932 RL, is a stony background asteroid from the Florian region in the inner asteroid belt, approximately 7.5 kilometers in diameter. It was discovered on 8 September 1932, by astronomer Eugène Delporte at the Royal Observatory of Belgium in Uccle. The S-type asteroid has a rotation period of at least 10 hours. It was named for Chantal, the niece of Belgian astronomer Georges Roland.

    <span class="mw-page-title-main">1220 Crocus</span>

    1220 Crocus, provisionally designated 1932 CU, is a stony Eoan asteroid and slow rotator from the outer regions of the asteroid belt, approximately 17 kilometers in diameter. It was discovered on 11 February 1932, by German astronomer Karl Reinmuth at Heidelberg Observatory in southwest Germany.

    1253 Frisia, provisional designation 1931 TV1, is a carbonaceous Themistian asteroid from the outer regions of the asteroid belt, approximately 20 kilometers in diameter. Discovered by Karl Reinmuth at Heidelberg Observatory in 1931, the asteroid was later named after the region of Frisia and the Frisian Islands.

    1227 Geranium, provisional designation 1931 TD, is a carbonaceous background asteroid from the outer regions of the asteroid belt, approximately 46 kilometers in diameter. It was discovered on 5 October 1931, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory. The asteroid was named for the flowering plant Geranium (cranesbills).

    1410 Margret, provisional designation 1937 AL, is an Eoan asteroid from the outer regions of the asteroid belt, approximately 21 kilometers in diameter. It was discovered on 8 January 1937, by astronomer Karl Reinmuth at the Heidelberg Observatory in southwest Germany. The asteroid was named after Margret Braun, wife of the Heidelberg astronomer Heinrich Vogt.

    1247 Memoria, provisional designation 1932 QA, is a dark Themistian asteroid from the outer regions of the asteroid belt, approximately 37 kilometers in diameter. It was discovered by Marguerite Laugier at Uccle Observatory in 1932, who later named it Memoria in memory of her pleasant stay at the discovering observatory.

    1720 Niels, provisional designation 1935 CQ, is a stony asteroid from the inner regions of the asteroid belt, approximately 6.4 kilometers in diameter. It was discovered on 7 February 1935, by German astronomer Karl Reinmuth at Heidelberg Observatory in southern Germany, and named after a grandson of the discoverer.

    1990 Pilcher, provisional designation 1956 EE, is a stony background asteroid from the Florian region of the inner asteroid belt, approximately 7 kilometers in diameter. It was discovered on 9 March 1956, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in Heidelberg, Germany. In 1982, it was named by the MPC for American physicist and photometrist Frederick Pilcher. The S-type asteroid has a short rotation period of 2.8 hours.

    1258 Sicilia, provisional designation 1932 PG, is a dark background asteroid from the outer regions of the asteroid belt, approximately 44 kilometers in diameter. It was discovered on 8 August 1932, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany. The asteroid was named after the Italian island of Sicily.

    <span class="mw-page-title-main">1704 Wachmann</span> Main-belt asteroid

    1704 Wachmann, provisional designation A924 EE, is a stony asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered by German astronomer Karl Reinmuth at Heidelberg Observatory on 7 March 1924. It was later named after astronomer Arno Wachmann.

    References

    1. 1 2 3 4 5 "JPL Small-Body Database Browser: 1218 Aster (1932 BJ)" (2017-06-04 last obs.). Jet Propulsion Laboratory. Archived from the original on 18 September 2020. Retrieved 23 July 2017.
    2. ↑ "aster". Merriam-Webster.com Dictionary .
    3. 1 2 3 Schmadel, Lutz D. (2007). "(1218) Aster". Dictionary of Minor Planet Names – (1218) Aster. Springer Berlin Heidelberg. p. 101. doi:10.1007/978-3-540-29925-7_1219. ISBN   978-3-540-00238-3.
    4. 1 2 3 Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R.; et al. (August 2014). "Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos". The Astrophysical Journal. 791 (2): 11. arXiv: 1406.6645 . Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121 . Retrieved 23 July 2017.
    5. 1 2 "1218 Aster (1932 BJ)". Minor Planet Center. Retrieved 23 July 2017.
    6. ↑ Minor Planet Lightcurve Data, Organ Mesa Observatory. "Asteroid Lightcurve Research 1218 Aster Phased Plot". Fred Pilcher's Minor Planet Lightcurves. Astronomical Society of Las Cruces (ASLC). Retrieved 1 June 2018.
    7. ↑ "LCDB Data for (1218) Aster". Asteroid Lightcurve Database (LCDB). Retrieved 23 July 2017.
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