2028 Janequeo

Last updated

2028 Janequeo
Discovery  [1]
Discovered by C. Torres
S. Cofré
Discovery site Cerro El Roble Stn.
Discovery date18 July 1968
Designations
(2028) Janequeo
Named after
 Janequeo (or Yanequén)
(Mapuche heroine) [2]
1968 OB1
main-belt  · Flora   [3]
Orbital characteristics   [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 47.89 yr (17,491 days)
Aphelion 2.5550 AU
Perihelion 2.0382 AU
2.2966 AU
Eccentricity 0.1125
3.48 yr (1,271 days)
70.128°
0° 16m 59.52s / day
Inclination 7.9558°
242.80°
27.574°
Physical characteristics
Dimensions 2.45 km (calculated) [3]
3.201±0.290 km [4] [5]
2.480±0.0002 h [6]
0.24 (assumed) [3]
0.273±0.070 [4] [5]
S   [3]
14.5 [4]  ·14.769±0.004(R) [6]  ·14.79±0.38 [7]  ·14.8 [1]  ·15.22 [3]

    2028 Janequeo, provisional designation 1968 OB1, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 3 kilometers in diameter. It was discovered on July 18, 1968, by Chilean astronomers Carlos Torres and S. Cofre at the Cerro El Roble Station of Chile's National Astronomical Observatory. [8] The asteroid named after the indigenous heroine Janequeo (Yanequén). [2]

    Contents

    Classification and orbit

    Janequeo is a member of the Flora family, one of the largest collisional populations of stony asteroids. It orbits the Sun in the inner main-belt at a distance of 2.0–2.6  AU once every 3 years and 6 months (1,271 days). Its orbit has an eccentricity of 0.11 and an inclination of 8° with respect to the ecliptic. [1] The body's observation arc begins at the discovering observatory one night after its official discovery observation on 19 July 1968. [8]

    Physical characteristics

    Lightcurves

    In August 2010, a rotational lightcurve of Janequeo was obtained from photometric observations by astronomers at the Palomar Transient Factory in California. Lightcurve analysis gave a short rotation period of 2.480 hours with a brightness amplitude of 0.27 magnitude ( U=2 ). [6]

    Diameter and albedo

    According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Janequeo measures 3.201 kilometers in diameter and its surface has an albedo of 0.273. [4] [5] The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – derived from 8 Flora, the largest member and namesake of the Flora family – and calculates a diameter of 2.45 kilometers based on an absolute magnitude of 15.22. [3]

    Naming

    This minor planet was named after Janequeo (Yanequén), a heroine and leader of the native Mapuche people of Chile. After her husband Huepotaén died in battle against the colonial Spaniards during the Arauco War in the 16th century, she became tribal chief and brought together various rebellious tribes. [2] The approved naming citation was published by the Minor Planet Center on 1 June 1980 ( M.P.C. 5359). [9]

    See also

    Related Research Articles

    <span class="mw-page-title-main">1743 Schmidt</span> Asteroid

    1743 Schmidt, provisional designation 4109 P-L, is a dark background asteroid from the inner regions of the asteroid belt, approximately 19 kilometers in diameter. It was discovered during the Palomar–Leiden survey on 24 September 1960, by astronomers Ingrid and Cornelis van Houten at Leiden, on photographic plates taken by Tom Gehrels at Palomar Observatory in California. The C-type asteroid has a rotation period of 17.5 hours. It was named for the optician Bernhard Schmidt.

    2023 Asaph, provisional designation 1952 SA, is a dark asteroid from the outer regions of the asteroid belt, approximately 21 kilometers in diameter. It was discovered on 16 September 1952, by astronomers of the Indiana Asteroid Program at Goethe Link Observatory in Indiana, United States.

    6433 Enya, provisional designation 1978 WC, is a stony background asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered on 18 November 1978, by Czech astronomer Antonín Mrkos at the Kleť Observatory in the Czech Republic. It was named for Irish musician Enya.

    1159 Granada, provisional designation 1929 RD, is a dark background asteroid and relatively slow rotator from the inner regions of the asteroid belt, approximately 30 kilometers in diameter. It was discovered on 2 September 1929, by astronomer Karl Reinmuth at the Heidelberg Observatory in southwest Germany. The asteroid was named for the Spanish city and province of Granada.

    (9928) 1981 WE9, provisional designation 1981 WE9, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 3 kilometers in diameter. It was discovered on 16 November 1981, by astronomers at Perth Observatory in Bickley, Australia.

    <span class="mw-page-title-main">9912 Donizetti</span> Asteroid

    9912 Donizetti, provisional designation 2078 T-3, is a stony Rafita asteroid from the central regions of the asteroid belt, approximately 7 km in diameter. It was discovered during the third Palomar–Leiden Trojan survey in 1977, and named after Italian composer Gaetano Donizetti.

    6349 Acapulco, provisional designation 1995 CN1, is a dark Adeonian asteroid from the middle region of the asteroid belt, approximately 22 kilometers in diameter.

    3567 Alvema, provisional designation 1930 VD, is a dark asteroid from the middle region of the asteroid belt, approximately 14 kilometers in diameter. It was discovered by Belgian astronomer Eugène Delporte at the Royal Observatory of Belgium in Uccle, on 15 November 1930. It was named after the discoverer's three great-granddaughters Aline, Vérionique and Martine.

    <span class="mw-page-title-main">2839 Annette</span> Flora family asteroid

    2839 Annette is a bright Flora asteroid from the inner regions of the asteroid belt. It was discovered on 5 October 1929, by American astronomer Clyde Tombaugh at Lowell Observatory during his search for Pluto. The presumed S-type asteroid has a rotation period of 10.5 hours and measures approximately 5 kilometers in diameter. It was named after the discoverer's daughter.

    1929 Kollaa, provisional designation 1939 BS, is a stony Vestian asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland, on 20 January 1939. The asteroid was named after the Kollaa River in what is now Russia.

    4944 Kozlovskij, provisional designation 1987 RP3, is a carbonaceous Witt asteroid from the central regions of the asteroid belt, approximately 10 kilometers (6 miles) in diameter. It was discovered on 2 September 1987, by Soviet astronomer Lyudmila Chernykh at the Crimean Astrophysical Observatory in Nauchnij, on the Crimean Peninsula. The asteroid was named for Russian opera singer Ivan Kozlovsky.

    1907 Rudneva, provisional designation 1972 RC2, is a stony background asteroid from the central regions of the asteroid belt, approximately 11 kilometers in diameter. It was discovered on 11 September 1972, by astronomer Nikolai Chernykh at the Crimean Astrophysical Observatory, Nauchnyj, on the Crimean peninsula. The asteroid was named after Soviet geodesist and war hero Yevgeniya Rudneva.

    <span class="mw-page-title-main">2111 Tselina</span> Stony asteroid in the outer asteroid belt

    2111 Tselina is a stony Eos asteroid from the outer regions of the asteroid belt. It was discovered on 13 June 1969, by Soviet astronomer Tamara Smirnova at Crimean Astrophysical Observatory in Nauchnij, on the Crimean peninsula. The S-type asteroid has a rotation period of 6.6 hours and measures approximately 23 kilometers in diameter. It was later named after the Soviet Virgin Lands Campaign.

    1323 Tugela, provisional designation 1934 LD, is a dark background asteroid from the outer regions of the asteroid belt, approximately 60 kilometers in diameter. It was discovered on 19 May 1934, by South African astronomer Cyril Jackson at the Union Observatory in Johannesburg. The asteroid was named for the Tugela River in western South Africa.

    2019 van Albada, provisional designation 1935 SX1, is a stony Florian asteroid and former spacecraft target from the inner regions of the asteroid belt, approximately 8 kilometers in diameter. It was discovered on 28 September 1935, by Dutch astronomer Hendrik van Gent at Leiden Southern Station, annex to the Johannesburg Observatory in South Africa. The asteroid was later named after Gale Bruno van Albada.

    17163 Vasifedoseev (provisional designation 1999 LT19) is a stony Koronian asteroid from the outer region of the asteroid belt, approximately 4 kilometers in diameter.

    10551 Göteborg, provisional designation 1992 YL2, is a stony Eoan asteroid and slow rotator from the outer region of the asteroid belt, approximately 13 kilometers in diameter. It was discovered on 18 December 1992, by Belgian astronomer Eric Elst at CERGA in Caussols (010), southeastern France. The asteroid was named after the Swedish city of Gothenburg (Göteborg).

    2011 Veteraniya, provisional designation 1970 QB1, is a stony Vestian asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter. It was discovered on 30 August 1970, by Soviet astronomer Tamara Smirnova at the Crimean Astrophysical Observatory, Nauchnyj, on the Crimean peninsula, and named for the Soviet veterans of the Second World War.

    12999 Toruń, provisional designation 1981 QJ2, is a carbonaceous Baptistina asteroid from the inner regions of the asteroid belt, approximately 8 kilometers in diameter. It was discovered on 30 August 1981, by British–American astronomer Edward Bowell at Lowell Observatory's Anderson Mesa Station in Flagstaff, Arizona, and named after the Polish city of Toruń.

    (163243) 2002 FB3, provisional designation 2002 FB3, is a stony asteroid on an eccentric orbit, classified as near-Earth object and potentially hazardous asteroid of the Athen group, approximately 1.6 kilometers (1 mile) in diameter. It was discovered on 18 March 2002, by astronomers with the Lincoln Near-Earth Asteroid Research at the Lincoln Laboratory's Experimental Test Site near Socorro, New Mexico, in the United States. The Q-type asteroid has a rotation period of 6.2 hours.

    References

    1. 1 2 3 4 "JPL Small-Body Database Browser: 2028 Janequeo (1968 OB1)" (2016-06-07 last obs.). Jet Propulsion Laboratory . Retrieved 29 June 2017.
    2. 1 2 3 Schmadel, Lutz D. (2007). "(2028) Janequeo". Dictionary of Minor Planet Names – (2028) Janequeo. Springer Berlin Heidelberg. p. 164. doi:10.1007/978-3-540-29925-7_2029. ISBN   978-3-540-00238-3.
    3. 1 2 3 4 5 6 "LCDB Data for (2028) Janequeo". Asteroid Lightcurve Database (LCDB). Retrieved 29 June 2017.
    4. 1 2 3 4 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv: 1109.6407 . Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90.
    5. 1 2 3 Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J.; et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal. 741 (2): 20. arXiv: 1109.4096 . Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68 . Retrieved 29 June 2017.
    6. 1 2 3 Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David; et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal. 150 (3): 35. arXiv: 1504.04041 . Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75 . Retrieved 29 June 2017.
    7. ↑ Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv: 1506.00762 . Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007 . Retrieved 29 June 2017.
    8. 1 2 "2028 Janequeo (1968 OB1)". Minor Planet Center. Retrieved 29 June 2017.
    9. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 29 June 2017.


    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.