4585 Ainonai

Last updated

4585 Ainonai
Discovery  [1]
Discovered by K. Endate
K. Watanabe
Discovery site Kitami Obs.
Discovery date16 May 1990
Designations
(4585) Ainonai
Named after
Ainonai, near Kitami
(Japanese town) [2]
1990 KQ ·1972 LU
1978 WL12 ·1981 LC
Orbital characteristics   [3]
Epoch 31 May 2020 (JD 2459000.5)
Uncertainty parameter 0
Observation arc 47.87 yr (17,486 d)
Aphelion 3.3818 AU
Perihelion 2.0894 AU
2.7356 AU
Eccentricity 0.2362
4.52 yr (1,653 d)
220.84°
0° 13m 4.08s / day
Inclination 10.549°
82.966°
184.23°
Physical characteristics
Mean diameter
10.920±0.122  km [7]
38.31±0.05  h [8]
0.112±0.011 [7]
C (family-based) [9] [10]

    4585 Ainonai ( prov. designation:1990 KQ) is a dark Chloris asteroid, approximately 11 kilometers (6.8 miles) in diameter, located in the central region of the asteroid belt. It was discovered on 16 May 1990, by Japanese amateur astronomers Kin Endate and Kazuro Watanabe at the Kitami Observatory in eastern Hokkaidō, Japan. [1] The presumed carbonaceous C-type asteroid has a longer than average rotation period of 38.3 hours. It was named for the Japanese town of Ainonai, located near the discovering observatory. [2]

    Contents

    Orbit and classification

    When applying the hierarchical clustering method to its proper orbital elements, Ainonai is a core member of the Chloris family ( 509 ), [4] [5] [6] a smaller family of carbonaceous main-belt asteroids, named after its parent body 410 Chloris. [10] It orbits the Sun in the central asteroid belt at a distance of 2.1–3.4  AU once every 4 years and 6 months (1,653 days; semi-major axis of 2.74 AU). Its orbit has an eccentricity of 0.24 and an inclination of 11° with respect to the ecliptic. [3] The body's observation arc begins with its first observation as 1972 LU at Crimea–Nauchnij on 9 June 1972, or 18 years prior to its official discovery observation at Kitami. [1]

    Naming

    This minor planet was named after Ainonai, a small Japanese town located near Kitami in eastern Hokkaidō. Asteroids 3785 Kitami and 3720 Hokkaido are named after these two places. [2] The official naming citation was published by the Minor Planet Center on 21 November 1991 ( M.P.C. 19338). [11]

    Physical characteristics

    Ainonai is an assumed carbonaceous C-type asteroid. [9] This agrees with the overall spectral type of the Chloris family. [10] : 23 

    Lightcurve

    In June 2008, a rotational lightcurve of Ainonai was obtained from photometric observations by James W. Brinsfield at the Via Capote Observatory ( G69 ) in California. Lightcurve analysis gave a rotation period of (38.31±0.05) hours with a brightness variation of (0.30±0.02) magnitude ( U=3– ). [8]

    Diameter and albedo

    According to observations from the NEOWISE mission of NASA's space-based Wide-field Infrared Survey Explorer, Ainonai measures (10.920±0.122) kilometers in diameter and its surface has an albedo of (0.112±0.011). [7] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for a carbonaceous asteroid of 0.057 and calculates a diameter of 14.64 kilometers based on an absolute magnitude of 12.9. [9]

    Related Research Articles

    2807 Karl Marx, provisional designation 1969 TH6, is a carbonaceous Dorian asteroid from the central region of the asteroid belt, approximately 17 kilometers in diameter. It was discovered on 15 October 1969, by Russian astronomer Lyudmila Chernykh at the Crimean Astrophysical Observatory in Nauchnyj on the Crimean peninsula. The asteroid was later named for the German philosopher Karl Marx.

    848 Inna is a carbonaceous Themistian asteroid from the outer regions of the asteroid belt. It was discovered on 5 September 1915, by astronomer Grigory Neujmin at the Simeiz Observatory on the Crimean peninsula. The C-type asteroid measures approximately 33 kilometers in diameter, while its rotation period remains unknown. It was named after Russian astronomer Inna Nikolaevna Leman-Balanovskaya (1881–1945).

    845 Naëma is a large asteroid and the parent body of the Naëma family located in the outer regions of the asteroid belt. It was discovered on 16 November 1916, by astronomer Max Wolf at the Heidelberg-Königstuhl State Observatory in southwest Germany. The carbonaceous C-type asteroid has a rotation period of 20.9 hours and measures approximately 54 kilometers in diameter on average, as it is likely elongated in shape. Any reference of the asteroid's name to a person is unknown.

    Lilofee, provisional designation 1923 OK, is a carbonaceous Themistian asteroid from the outer regions of the asteroid belt, approximately 33 kilometers in diameter. It was discovered on 13 September 1923, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany. The asteroid was named after the Black Forest mermaid "Lilofee" from German folklore.

    <span class="mw-page-title-main">2708 Burns</span>

    2708 Burns is a carbonaceous Themistian asteroid from the outer regions of the asteroid belt, approximately 19 kilometers in diameter. It was discovered on 24 November 1981, by American astronomer Edward Bowell at the Anderson Mesa Station near Flagstaff, Arizona, in the United States. It was named after American planetary scientist Joseph A. Burns. The likely elongated B-type asteroid has a rotation period of 5.3 hours.

    2325 Chernykh, provisional designation 1979 SP, is a dark Themistian asteroid from the outer regions of the asteroid belt, approximately 23 kilometers in diameter. It was discovered on 25 September 1979, by Czech astronomer Antonín Mrkos at the Klet Observatory in the Czech Republic. The asteroid was named after Russian astronomer couple Lyudmila Chernykh and Nikolai Chernykh.

    1184 Gaea, provisional designation 1926 RE, is an Aerian asteroid from the central regions of the asteroid belt, approximately 20 kilometers in diameter. It was discovered on 5 September 1926, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany. The asteroid was named after the goddess of Earth, Gaea (Gaia), from Greek mythology.

    1845 Helewalda, provisional designation 1972 UC, is a carbonaceous Eoan asteroid in the outer regions of the asteroid belt, approximately 20 kilometers in diameter. It was discovered by Swiss astronomer Paul Wild at Zimmerwald Observatory near Bern, Switzerland, on 30 October 1972. The asteroid was named after Helen Gachnang, a friend of the discoverer.

    <span class="mw-page-title-main">5222 Ioffe</span>

    5222 Ioffe, provisional designation 1980 TL13, is a rare-type carbonaceous Palladian asteroid from the central region of the asteroid belt, approximately 18 kilometers in diameter. It was discovered on 11 October 1980, by Soviet astronomer Nikolai Chernykh at the Crimean Astrophysical Observatory in Nauchnyj, Crimea. It is the largest of the Palladian asteroids apart from Pallas itself.

    <span class="mw-page-title-main">6546 Kaye</span>

    6546 Kaye (prov. designation: 1987 DY4) is a dark and elongated background asteroid from the outer region of the asteroid belt. It was discovered on 24 February 1987, by Czech astronomer Antonín Mrkos at the South Bohemian Kleť Observatory in the Czech Republic. The presumed C-type asteroid has a rotation period of 10.0 hours and measures approximately 22 kilometers (14 miles) in diameter. It was named for American actor Danny Kaye.

    3785 Kitami, provisional designation 1986 WM, is a carbonaceous Themistian asteroid from the outer region of the asteroid belt, approximately 19 kilometers in diameter. The asteroid was discovered by Japanese astronomer Tsutomu Seki at Geisei Observatory on 30 November 1986, and named after the city of Kitami, Japan.

    <span class="mw-page-title-main">1217 Maximiliana</span>

    1217 Maximiliana, provisional designation 1932 EC, is a background asteroid from the inner regions of the asteroid belt, approximately 17 kilometers (11 mi) in diameter. It was discovered on 13 March 1932, by Belgian astronomer Eugène Delporte at the Royal Observatory of Belgium in Uccle. The asteroid was named in memory of Max Wolf, a German astronomer and discoverer of asteroids himself, who independently discovered this asteroid.

    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.

    3074 Popov, provisional designation 1979 YE9, is a carbonaceous Nysian asteroid from the inner regions of the asteroid belt, approximately 10 kilometers (6 miles) in diameter. It was discovered on 24 December 1979, by Soviet–Russian astronomer Lyudmila Zhuravleva at the Crimean Astrophysical Observatory in Nauchnyj on the Crimean peninsula. The B-type asteroid has an unknown rotation period. It was named after Russian physicist Alexander Stepanovich Popov, an early radio pioneer in Russia.

    3790 Raywilson, provisional designation 1937 UE, is a carbonaceous Themistian asteroid from the outer regions of the asteroid belt, approximately 12 kilometers in diameter. It was discovered on 26 October 1937, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in Heidelberg, Germany. The C-type asteroid has a rotation period of 4.65 hours. It was named for English physicist Raymond Wilson.

    16525 Shumarinaiko, provisional designation 1991 CU2, is a stony Nysian asteroid and synchronous binary system from the inner regions of the asteroid belt, approximately 5 kilometers in diameter. It was discovered on 14 February 1991, by Japanese astronomers Kin Endate and Kazuro Watanabe at the Kitami Observatory on the island of Hokkaidō in northern Japan. The asteroid was named after the Japanese Lake Shumarinai. Its sub-kilometer sized minor-planet moon was discovered in 2013.

    79912 Terrell, provisional designation 1999 CC3, is a dark Adeonian asteroid from the central regions of the asteroid belt, approximately 6 kilometers in diameter. It was discovered on 10 February 1999, by astronomers Walter Cooney and Ethan Kandler at the Highland Road Park Observatory, in Baton Rouge, Louisiana, United States. The asteroid was named after American astrophysicist Dirk Terrell.

    51983 Hönig, provisional designation 2001 SZ8, is a Hildian asteroid from the outermost regions of the asteroid belt, approximately 13 kilometers in diameter. It was discovered on 19 September 2001, by astronomers Charles Juels and Paulo Holvorcem at the Fountain Hills Observatory (678) in Arizona, United States. The asteroid was named after German astronomer Sebastian Hönig.

    10241 Miličević, provisional designation 1999 AU6, is a carbonaceous Themistian asteroid from the outer regions of the asteroid belt, approximately 11 kilometers (6.8 miles) in diameter. It was discovered on 9 January 1999, by Croatian astronomer Korado Korlević at the Višnjan Observatory in Croatia. The C-type asteroid has a short rotation period of 3.87 hours and was named after hermit and amateur astronomer Don Nikola Miličević.

    <span class="mw-page-title-main">5357 Sekiguchi</span> Asteroid

    5357 Sekiguchi is an Eos asteroid from the outer region of the asteroid belt, approximately 15 kilometers in diameter. It was discovered on 2 March 1992, by Japanese amateur astronomers Tetsuya Fujii and Kazuro Watanabe at the Kitami Observatory in eastern Hokkaidō, Japan. The asteroid was later named after Japanese astronomer Tomohiko Sekiguch.

    References

    1. 1 2 3 4 5 "4585 Ainonai (1990 KQ)". Minor Planet Center. Retrieved 11 June 2020.
    2. 1 2 3 Schmadel, Lutz D. (2007). "(4585) Ainonai". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 395. doi:10.1007/978-3-540-29925-7_4515. ISBN   978-3-540-00238-3.
    3. 1 2 3 4 "JPL Small-Body Database Browser: 4585 Ainonai (1990 KQ)" (2020-04-24 last obs.). Jet Propulsion Laboratory . Retrieved 11 June 2020.
    4. 1 2 "Asteroid 4585 Ainonai – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 11 June 2020.
    5. 1 2 "Asteroid 4585 Ainonai – Nesvorny HCM Asteroid Families V3.0". Small Bodies Data Ferret. Retrieved 11 June 2020.
    6. 1 2 Zappalà, V.; Bendjoya, Ph.; Cellino, A.; Farinella, P.; Froeschle, C. (1997). "Asteroid Dynamical Families". NASA Planetary Data System: EAR-A-5-DDR-FAMILY-V4.1. Retrieved 11 June 2020.} (PDS main page)
    7. 1 2 3 4 Mainzer, A. K.; Bauer, J. M.; Cutri, R. M.; Grav, T.; Kramer, E. A.; Masiero, J. R.; et al. (June 2016). "NEOWISE Diameters and Albedos V1.0". NASA Planetary Data System. Bibcode:2016PDSS..247.....M . Retrieved 11 June 2020.
    8. 1 2 Brinsfield, James W. (October 2008). "Asteroid Lightcurve Analysis at the Via Capote Observatory: 2nd Quarter 2008" (PDF). Minor Planet Bulletin. 35 (4): 179–181. Bibcode:2008MPBu...35..179B. ISSN   1052-8091. Archived from the original (PDF) on 17 March 2020. Retrieved 11 June 2020.
    9. 1 2 3 "LCDB Data for (4585) Ainonai". Asteroid Lightcurve Database (LCDB). Retrieved 11 June 2020.
    10. 1 2 3 Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). "Identification and Dynamical Properties of Asteroid Families". Asteroids IV. pp. 297–321. arXiv: 1502.01628 . Bibcode:2015aste.book..297N. doi:10.2458/azu_uapress_9780816532131-ch016. ISBN   9780816532131. S2CID   119280014.
    11. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 11 June 2020.
    This page is based on this Wikipedia article
    Text is available under the CC BY-SA 4.0 license; additional terms may apply.
    Images, videos and audio are available under their respective licenses.