1508 Kemi

Last updated

1508 Kemi
001508-asteroid shape model (1508) Kemi.png
Shape model of Kemi from its lightcurve
Discovery [1]
Discovered by H. Alikoski
Discovery site Turku Obs.
Discovery date21 October 1938
Designations
(1508) Kemi
Named after
 Kemi and Kemi River [2]   
(Finnish town and river)
1938 UP ·1935 FA
1938 UO
Mars-crosser [1] [3] [4]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 81.79 yr (29,873 days)
Aphelion 3.9264 AU
Perihelion 1.6167 AU
2.7716 AU
Eccentricity 0.4167
4.61 yr (1,685 days)
354.04°
0° 12m 48.96s / day
Inclination 28.723°
14.298°
92.892°
Mars  MOID 0.3966 AU
Physical characteristics
Dimensions15.78±1.58 km [5]
15.9±1.6 km [6]
16±2 km [7]
17.98±1.34 km [8]
21.86 km (calculated) [4]
9.15 h [9]
9.19±0.05 h [10]
9.19182±0.00005 h [11]
9.196±0.001 h [12] [lower-alpha 1]
11.36 h [13]
0.057 (assumed) [4]
0.084±0.013 [8]
0.109±0.022 [5]
0.11±0.02 [6] [7]
Tholen = BCF [1]
SMASS = C [1] [4]
B–V = 0.645 [1]
U–B = 0.249 [1]
12.03 [1] [4] [5] [6] [7] [8]

    1508 Kemi, provisional designation 1938 UP, is an eccentric, carbonaceous asteroid and one of the largest Mars-crossers, approximately 17 kilometers in diameter. Discovered by Heikki Alikoski at Turku Observatory in 1938, [3] the asteroid was later named after the Finnish town of Kemi and the Kemi River. [2]

    Contents

    Discovery

    Kemi was discovered on 21 October 1938, by Finnish astronomer Heikki Alikoski at the Iso-Heikkilä Observatory in Turku, Finland. [3] It was independently discovered by Hungarian astronomer György Kulin at Konkoly Observatory near Budapest on 30 October 1938. [2] The Minor Planet Center, however, only acknowledges the first discoverer. [3] The asteroid was first identified as 1935 FA at Uccle Observatory in March 1935. [3]

    Orbit and classification

    Kemi is a Mars-crossing asteroid as it crosses the orbit of Mars at 1.666 AU. Because of its high inclination, it has been grouped with the Pallas family ( 801 ), an asteroid family of bright carbonaceous asteroids, as well as with the "Phaethon group", despite its untypical spectrum. [14] [15]

    It orbits the Sun at a distance of 1.6–3.9  AU once every 4 years and 7 months (1,685 days). Its orbit has an eccentricity of 0.42 and an inclination of 29° with respect to the ecliptic. [1] The body's observation arc begins at Uccle in May 1935, more than 3 years prior to its official discovery observation at Turku. [3]

    Physical characteristics

    In the SMASS classification, Kemi is a common carbonaceous C-type asteroid. [1] In the Tholen classification, the body's spectral type is ambiguous (BCF), closest to that of a bright carbonaceous B-type and somewhat similar to a C- and F-type asteroid. [1]

    Rotation period

    Several rotational lightcurves of Kemi have been obtained from photometric observations since the 1990s. Analysis of the lightcurves gave a consolidated rotation period of 9.196 hours with a brightness variation between of 0.25 and 0.55 magnitude ( U=2/3/3/2 ). [9] [10] [12] [13] [lower-alpha 1]

    Poles

    In 2016, an international study modeled a lightcurve with a concurring period of 9.19182 hours. It also determined two spin axis at (352.0°, 72.0°) and (166.0°, 73.0°) in ecliptic coordinates (λ, β). [11]

    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, Kemi measures between 15.78 and 17.98 kilometers in diameter and its surface has an albedo between 0.084 and 0.11. [5] [6] [7] [8] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 21.86 kilometers based on an absolute magnitude of 12.03. [4]

    Naming

    This minor planet was named after the Finnish town of Kemi and the Kemi River (Kemijoki), the largest river in Finland, on which the town lies. The naming agrees with the established pattern of giving high-inclination asteroids four-letter names. [2] The official naming citation was published by the Minor Planet Center on 20 February 1976 ( M.P.C. 3928). [16]

    Notes

    1. 1 2 Lightcurve plot of (1508) Kemi, Robert Koff, Antelope Hills Observatory (H09). Summary figures at LCDB

    Related Research Articles

    <span class="mw-page-title-main">391 Ingeborg</span> Mars-crossing asteroid

    391 Ingeborg is an asteroid and second-largest Mars-crosser on an eccentric orbit from the asteroid belt. It was discovered by German astronomer Max Wolf on 1 November 1894, at the Heidelberg Observatory in southwest Germany. When discovered, it was observed for a couple of weeks, and follow-up observations were made in 1901 and 1904. The stony S-type asteroid has a rotation period of 26.4 hours and measures approximately 17 kilometers in diameter. Any reference of the asteroid's name to a person is unknown.

    Lina, provisional designation 1901 FZ, is a dark Themistian asteroid from the outer region of the asteroid belt, approximately 60 kilometers in diameter. It was discovered on 18 January 1901, by German astronomer Max Wolf at the Heidelberg Observatory in southwest Germany. The carbonaceous asteroid was named for the housemaid of the discoverer's family.

    <span class="mw-page-title-main">512 Taurinensis</span> Mars-crossing asteroid

    Taurinensis, provisional designation 1903 LV, is a stony asteroid and large Mars-crosser on an eccentric orbit from the inner regions of the asteroid belt, approximately 20 kilometers in diameter. It was discovered on 23 June 1903, by astronomer Max Wolf at the Heidelberg-Königstuhl State Observatory in southwest Germany. The asteroid was named after the Italian city of Turin. It is the 4th-largest Mars-crossing asteroid.

    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">1021 Flammario</span>

    1021 Flammario, provisional designation 1924 RG, is a dark background asteroid from the central regions of the asteroid belt, approximately 100 kilometers in diameter. It was discovered on 11 March 1924, by German astronomer Max Wolf at the Heidelberg-Königstuhl State Observatory in Heidelberg, Germany. The asteroid was named after French astronomer Camille Flammarion. The uncommon F-type asteroid has a rotation period of 12.16 hours.

    3204 Lindgren, provisional designation 1978 RH, is a carbonaceous background asteroid from the outer regions of the asteroid belt, approximately 20 kilometers in diameter. It was discovered on 1 September 1978, by Soviet astronomer Nikolai Chernykh at the Crimean Astrophysical Observatory in Nauchnij, on the Crimean peninsula. The B-type asteroid has a rotation period of 5.6 hours. It was named after Swedish writer Astrid Lindgren.

    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. The asteroid was named for the natural science of astronomy.

    1213 Algeria, provisional designation 1931 XD, is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 32 kilometers in diameter. Discovered by Guy Reiss at Algiers Observatory in 1931, it was named after the North African country of Algeria.

    3581 Alvarez, provisional designation 1985 HC, is a carbonaceous asteroid and a very large Mars-crosser on an eccentric orbit from the asteroid belt, approximately 13.7 kilometers in diameter. It was discovered on 23 April 1985, by American astronomer couple Carolyn and Eugene Shoemaker at the Palomar Observatory in California. The likely spherical B-type asteroid has a rotation period of 33.4 hours. It was named for scientists Luis Alvarez and his son Walter Alvarez.

    1474 Beira, provisional designation 1935 QY, is a bright carbonaceous asteroid and large Mars-crosser on an eccentric orbit from the asteroid belt, approximately 15 kilometers in diameter. It was discovered on 20 August 1935, by South African astronomer Cyril Jackson at the Union Observatory in Johannesburg. The asteroid was named after the port city of Beira in Mozambique.

    <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.

    <span class="mw-page-title-main">1576 Fabiola</span> Asteroid

    1576 Fabiola, provisional designation 1948 SA, is a Themistian asteroid from the outer regions of the asteroid belt, approximately 27 kilometers in diameter. It was discovered on 30 September 1948, by Belgian astronomer Sylvain Arend at the Royal Observatory of Belgium in Uccle. The asteroid was named after Queen Fabiola of Belgium.

    <span class="mw-page-title-main">1444 Pannonia</span>

    1444 Pannonia is a carbonaceous background asteroid from the outer region of the asteroid belt, approximately 29 kilometers in diameter. It was discovered on 6 January 1938, by Hungarian astronomer György Kulin at Konkoly Observatory in Budapest, Hungary. It was named after the ancient province of the Roman Empire, Pannonia.

    <span class="mw-page-title-main">1484 Postrema</span>

    1484 Postrema, provisional designation 1938 HC, is a carbonaceous Postremian asteroid and namesake of the Postrema family from the central regions of the asteroid belt, approximately 41 kilometers in diameter. It was discovered on 29 April 1938, by Soviet astronomer Grigory Neujmin at the Simeiz Observatory on the Crimean peninsula. The name "Postrema" celebrates the astronomer's last minor planet discovery.

    <span class="mw-page-title-main">1204 Renzia</span> Asteroid

    1204 Renzia, provisional designation 1931 TE, is a stony asteroid and sizable Mars-crosser on an eccentric orbit from the inner regions of the asteroid belt, approximately 10 kilometers in diameter. It was discovered by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany on 6 October 1931. The asteroid was named after German-Russian astronomer Franz Renz.

    2629 Rudra, provisional designation 1980 RB1, is a sizable Mars-crossing asteroid and slow rotator inside the asteroid belt, approximately 5.3 kilometers (3.3 miles) in diameter. It was discovered on 13 September 1980, by American astronomer Charles Kowal at the Palomar Observatory in California. The dark B-type asteroid has a long rotation period 123 hours and likely an elongated shape. It was named after Rudra from Hindu mythology.

    <span class="mw-page-title-main">1493 Sigrid</span>

    1493 Sigrid, provisional designation 1938 QB, is a dark Nysian asteroid from the inner regions of the asteroid belt, approximately 24 kilometers in diameter. It was discovered on 26 August 1938, by Belgian astronomer Eugène Delporte at the Royal Observatory of Belgium in Uccle. It was named after Sigrid Strömgren, wife of astronomer Bengt Strömgren.

    1340 Yvette, provisional designation 1934 YA, is a carbonaceous Themistian asteroid from the outer regions of the asteroid belt, approximately 29 kilometers in diameter. It was discovered on 27 December 1934, by astronomer Louis Boyer at the Algiers Observatory, who named it after his niece, Yvette.

    <span class="mw-page-title-main">1310 Villigera</span>

    1310 Villigera, provisional designation 1932 DB, is a stony asteroid and large Mars-crosser from the innermost regions of the asteroid belt, approximately 14 kilometers in diameter. It was discovered on 28 February 1932, by German astronomer Friedrich Schwassmann at Bergedorf Observatory in Hamburg, Germany. The asteroid was named after astronomer Walther Villiger.

    <span class="mw-page-title-main">7517 Alisondoane</span>

    7517 Alisondoane is a dark background asteroid from the inner regions of the asteroid belt. It was discovered on 3 January 1989, by Japanese amateur astronomer Takuo Kojima at the YGCO Chiyoda Station in the northern Kantō region of Japan. The carbonaceous C-type asteroid has a rotation period of 9.7 hours and measures approximately 9 kilometers in diameter. It was named after Alison Doane (1958–2017), curator of astronomical photographs at the Harvard College Observatory.

    References

    1. 1 2 3 4 5 6 7 8 9 10 11 "JPL Small-Body Database Browser: 1508 Kemi (1938 UP)" (2017-01-09 last obs.). Jet Propulsion Laboratory. Archived from the original on 20 August 2020. Retrieved 18 October 2017.
    2. 1 2 3 4 Schmadel, Lutz D. (2007). "(1508) Kemi". Dictionary of Minor Planet Names – (1508) Kemi. Springer Berlin Heidelberg. p. 120. doi:10.1007/978-3-540-29925-7_1509. ISBN   978-3-540-00238-3.
    3. 1 2 3 4 5 6 "1508 Kemi (1938 UP)". Minor Planet Center. Retrieved 18 October 2017.
    4. 1 2 3 4 5 6 "LCDB Data for (1508) Kemi". Asteroid Lightcurve Database (LCDB). Retrieved 18 October 2017.
    5. 1 2 3 4 Alí-Lagoa, V.; Delbo', M. (July 2017). "Sizes and albedos of Mars-crossing asteroids from WISE/NEOWISE data". Astronomy and Astrophysics. 603: 8. arXiv: 1705.10263 . Bibcode:2017A&A...603A..55A. doi:10.1051/0004-6361/201629917.
    6. 1 2 3 4 Alí-Lagoa, V.; Licandro, J.; Gil-Hutton, R.; Cañ; ada-Assandri, M.; Delbo', M.; et al. (June 2016). "Differences between the Pallas collisional family and similarly sized B-type asteroids". Astronomy and Astrophysics. 591: 11. Bibcode:2016A&A...591A..14A. doi: 10.1051/0004-6361/201527660 . hdl: 11336/63614 . Retrieved 18 October 2017.
    7. 1 2 3 4 Alí-Lagoa, V.; de León, J.; Licandro, J.; Delbó, M.; Campins, H.; Pinilla-Alonso, N.; et al. (June 2013). "Physical properties of B-type asteroids from WISE data". Astronomy and Astrophysics. 554: 16. arXiv: 1303.5487 . Bibcode:2013A&A...554A..71A. doi:10.1051/0004-6361/201220680 . Retrieved 18 October 2017.
    8. 1 2 3 4 Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi: 10.1093/pasj/63.5.1117 . (online, AcuA catalog p. 153)
    9. 1 2 Sárneczky, K.; Szabó, Gy.; Kiss, L. L. (June 1999). "CCD observations of 11 faint asteroids". Astronomy and Astrophysics Supplement. 137 (2): 363–368. Bibcode:1999A&AS..137..363S. doi: 10.1051/aas:1999251 . Retrieved 18 October 2017.
    10. 1 2 Jamieson, Quentin; Klinglesmith, Daniel A. III (December 2004). "Period determination of asteroids 1508 Kemi and 5036 Tuttle". The Minor Planet Bulletin. 31 (4): 88–89. Bibcode:2004MPBu...31...88J. ISSN   1052-8091 . Retrieved 18 October 2017.
    11. 1 2 Hanus, J.; Durech, J.; Oszkiewicz, D. A.; Behrend, R.; Carry, B.; Delbo, M.; et al. (February 2016). "New and updated convex shape models of asteroids based on optical data from a large collaboration network". Astronomy and Astrophysics. 586: 24. arXiv: 1510.07422 . Bibcode:2016A&A...586A.108H. doi:10.1051/0004-6361/201527441.
    12. 1 2 Koff, Robert A. (September 2004). "Lightcurve photometry of asteroids 306, 1508, 3223, 3270 and 3712". The Minor Planet Bulletin. 31 (3): 58–60. Bibcode:2004MPBu...31...58K. ISSN   1052-8091 . Retrieved 18 October 2017.
    13. 1 2 Holliday, B. (December 1995). "Lightcurve Observations of Minor Planets 1508 Kemi and 2014 Vasilevskis". The Minor Planet Bulletin. 22: 43. Bibcode:1995MPBu...22...43H . Retrieved 18 October 2017.
    14. ↑ Novaković, Bojan; Cellino, Alberto; Knežević, Zoran (November 2011). "Families among high-inclination asteroids". Icarus. 216 (1): 69–81. arXiv: 1108.3740 . Bibcode:2011Icar..216...69N. doi:10.1016/j.icarus.2011.08.016.
    15. ↑ Jenniskens, Peter; Vaubaillon, Jérémie; Binzel, Richard P.; DeMeo, Francesca E.; Nesvorný, David; Bottke, William F.; et al. (October 2010). "Almahata Sitta (=asteroid 2008 TC3) and the search for the ureilite parent body" (PDF). Meteoritics and Planetary Science. 45 (1590): 1590–1617. Bibcode:2010M&PS...45.1590J. doi:10.1111/j.1945-5100.2010.01153.x . Retrieved 19 October 2017.
    16. ↑ Schmadel, Lutz D. (2009). "Appendix – Publication Dates of the MPCs". Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008). Springer Berlin Heidelberg. p. 221. doi:10.1007/978-3-642-01965-4. ISBN   978-3-642-01964-7.
    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.