1245 Calvinia

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1245 Calvinia
001245-asteroid shape model (1245) Calvinia.png
Shape model of Calvinia from its lightcurve
Discovery [1]
Discovered by C. Jackson
Discovery site Johannesburg Obs.
Discovery date26 May 1932
Designations
(1245) Calvinia
Named after
 Calvinia [2]
(South African city)
1932 KF ·1948 VT
1950 CP ·A906 FB
A914 YB ·A916 DC
A917 KE
main-belt [1] [3]  ·(outer)
background [4]  · Koronis [4] [5] [6]
Orbital characteristics [3]
Epoch 27 April 2019 (JD 2458600.5)
Uncertainty parameter 0
Observation arc 112.59 yr (41,125 d)
Aphelion 3.1302 AU
Perihelion 2.6536 AU
2.8919 AU
Eccentricity 0.0824
4.92 yr (1,796 d)
137.36°
0° 12m 1.44s / day
Inclination 2.8936°
151.72°
208.24°
Physical characteristics
26.84±3.5  km [7]
29.751±0.204 km [8] [9]
30.444±0.137 km [10]
30.95±0.78 km [11]
4.8523±0.0001  h [12]
0.214 [11]
0.2202 [10]
0.221 [8] [9]
0.2713 [7]
Tholen = S [3] [6]
B–V = 0.847 [4]
U–B = 0.474 [4]
9.89 [7] [8] [10] [11]
9.9 [1] [3] [6]
10.11±0.03 [13]

    1245 Calvinia (prov. designation: 1932 KF) is a stony Koronian asteroid from the outer regions of the asteroid belt, approximately 30 kilometers (19 miles) in diameter. It was discovered on 26 May 1932, by South African astronomer Cyril Jackson at the Union Observatory in Johannesburg. [1] The S-type asteroid is likely elongated and has a rotation period of 4.9 hours. [6] It was named for the city of Calvinia in South Africa. [2]

    Contents

    Orbit and classification

    According to Zappalà, Mothé-Diniz, as well as Milani and Knežević, Calvinia is a member of the Koronis family ( 605 ), [4] [5] a very large outer asteroid family with nearly co-planar ecliptical orbits. [14] Interestingly, in one of the most recent and complete synthetic HCM-analysis by Nesvorný, Calvinia is not a Koronian asteroid but belongs to the background population. [4]

    It orbits the Sun in the outer main-belt at a distance of 2.7–3.1  AU once every 4 years and 11 months (1,796 days; semi-major axis of 2.89 AU). Its orbit has an eccentricity of 0.08 and an inclination of 3° with respect to the ecliptic. [3] The asteroid was first observed as A906 FB at the Heidelberg Observatory in March 1906. The body's observation arc begins with its official discovery observation at Johannesburg in May 1932. [1]

    Naming

    This minor planet was named after the regional city Calvinia in the Cape Province of South Africa. [2] The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 ( H 115 ). [2]

    Physical characteristics

    In the Tholen classification, Calvinia is a common stony S-type asteroid, [4] which is also the overall spectral type for members of the Koronis family. [14] : 23  In the Barucci taxonomy (1987), it is an S0-type asteroid. [4]

    Rotation period

    In October 2017, a rotational lightcurve of Calvinia was obtained from photometric observations by Romain Montaigut, Christophe Gillier and Arnaud Leroy. Lightcurve analysis gave a rotation period of 4.8523±0.0001 hours with a brightness variation of 0.28 magnitude ( U=3 ). [12]

    Other rotational were obtained by (ordered by increasing period determinations ) Brines (4.73 h; Δ0.35 mag; U=3-) in 2016, [15] by Lagerkvist (4.8 h; Δ0.52 mag; U=2) and (4.85 h; Δ0.7 mag; U=2) in 1975 and 1978, [16] [17] respectively, by Erikson (4.84 h; U=3) in 1990, [18] by Slivan (4.8512 h; Δ0.37 mag; U=3) in 2002, by Roy (4.85129 h; Δ0.50 mag; U=3-), [12] and by Tedesco (4.855 h; Δ0.63 mag; U=3) in 1979. [6]

    A modeled lightcurve using photometric data from the Lowell Photometric Database was published in 2016. It gave a concurring period of 4.85148±0.00001 hours, as well as two spin axes at (52.0°, −51.0°) and (235.0°, −43.0°) in ecliptic coordinates (λ, β). [19]

    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, Calvinia measures between 26.84 and 30.95 kilometers in diameter and its surface has an albedo between 0.214 and 0.2713. [7] [8] [9] [10] [11] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.2689 and a diameter of 26.83 kilometers based on an absolute magnitude of 9.9. [6]

    Related Research Articles

    716 Berkeley is a background asteroid from the central regions of the asteroid belt. It was discovered by Austrian astronomer Johann Palisa at the Vienna Observatory on 30 July 1911. The stony S-type asteroid has a rotation period of 15.6 hours and measures approximately 21 kilometers in diameter. It was named after the city of Berkeley, California, where the discoverer's colleague Armin Otto Leuschner (1868–1953) was the director of the local observatory.

    La Paz, provisional designation 1923 PD, is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 40 kilometers in diameter. It was discovered on 31 October 1923, by German astronomer Max Wolf at the Heidelberg-Königstuhl State Observatory and named after the city La Paz in Bolivia.

    <span class="mw-page-title-main">1223 Neckar</span>

    1223 Neckar, provisional designation 1931 TG, is a stony Koronian asteroid from the outer region of the asteroid belt, approximately 25 kilometers in diameter. Discovered by Karl Reinmuth at Heidelberg Observatory in 1931, the asteroid was named for the German river Neckar. The S-type asteroid has a rotation period of 7.8 hours.

    <span class="mw-page-title-main">1132 Hollandia</span> Asteroid

    1132 Hollandia, provisional designation 1929 RB1, is a stony asteroid from the middle region of the asteroid belt, approximately 27 kilometers in diameter. It was discovered on 13 September 1929, by Dutch astronomer Hendrik van Gent at Leiden Southern Station, annex to the Johannesburg Observatory in South Africa. It was named for the region Holland in the Netherlands.

    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.

    <span class="mw-page-title-main">1165 Imprinetta</span> Carbonaceous Meliboean asteroid

    1165 Imprinetta, provisional designation 1930 HM, is a carbonaceous Meliboean asteroid from the outer regions of the asteroid belt, approximately 49 kilometers (30 mi) in diameter. It was discovered on 24 April 1930 by Dutch astronomer Hendrik van Gent at the Union Observatory in Johannesburg, South Africa. The asteroid was named after Imprinetta Gent, wife of the discoverer.

    4899 Candace, provisional designation 1988 JU, is a background asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered on 9 May 1988, by astronomer couple Carolyn and Eugene Shoemaker at the Palomar Observatory in California, United States. The asteroid was named after American chemist Candace Kohl.

    <span class="mw-page-title-main">1551 Argelander</span>

    1551 Argelander, provisional designation 1938 DC1, is a background asteroid from the inner regions of the asteroid belt, approximately 10 kilometers (6.2 miles) in diameter. It was discovered on 24 February 1938, by Finnish astronomer Yrjö Väisälä at the Turku Observatory in southwest Finland. The likely S-type asteroid has a rotation period of 4.1 hours. It was named after German astronomer Friedrich Argelander.

    <span class="mw-page-title-main">1244 Deira</span>

    1244 Deira is a dark background asteroid and slow rotator from the inner region of the asteroid belt. The X-type asteroid has an exceptionally long rotation period of 210.6 hours and measures approximately 31 kilometers in diameter. It was discovered on 25 May 1932, by English-born South African astronomer Cyril Jackson at the Union Observatory in Johannesburg, who named it after Deira, an old kingdom near his birthplace, the market town of Ossett, located in West Yorkshire, England.

    <span class="mw-page-title-main">1848 Delvaux</span> Stony Koronis asteroid

    1848 Delvaux is a stony Koronis asteroid from the outer region of the asteroid belt, approximately 17 kilometers in diameter. It was discovered on 18 August 1933, by Belgian astronomer Eugène Delporte at the Royal Observatory of Belgium in Uccle, Belgium. It was later named after astronomer Georges Roland's sister-in-law.

    4282 Endate, provisional designation 1987 UQ1, is an asteroid from the inner regions of the asteroid belt, approximately 10 kilometers in diameter. It was discovered on 28 October 1987, by Japanese astronomers Seiji Ueda and Hiroshi Kaneda at Kushiro Observatory (399) in Japan. It was named for amateur astronomer Kin Endate.

    <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">1299 Mertona</span> Bright background asteroid

    1299 Mertona is a bright background asteroid from the central region of the asteroid belt. It was discovered on 18 January 1934, by French astronomer Guy Reiss at Algiers Observatory, Algeria, in northern Africa. The likely stony asteroid with an unknown spectral type has a rotation period of 5.0 hours and measures approximately 14 kilometers in diameter. It was named after English astronomer Gerald Merton.

    1536 Pielinen, provisional designation 1939 SE, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 7.8 kilometers in diameter. It was discovered on 18 September 1939, by Finnish astronomer Yrjö Väisälä at Turku Observatory, Southwest Finland. It was later named for Finnish lake Pielinen.

    1447 Utra, provisional designation 1938 BB, is a stony asteroid, slow rotator and suspected tumbler from the central region of the asteroid belt, approximately 12 kilometers in diameter. It was discovered on 26 January 1938, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland. The asteroid was named for the Finnish town of Utra.

    <span class="mw-page-title-main">1263 Varsavia</span> Asteroid

    1263 Varsavia, provisional designation 1933 FF, is an asteroid from the central region of the asteroid belt, approximately 40 kilometers in diameter. It was discovered on 23 March 1933, by Belgian astronomer Sylvain Arend at Uccle Observatory in Belgium. It is named for the city of Warsaw.

    1296 Andrée, provisional designation 1933 WE, is a stony Nysian asteroid from the inner regions of the asteroid belt, approximately 25 kilometers in diameter. It was discovered on 25 November 1933, by French astronomer Louis Boyer at the North African Algiers Observatory, Algeria, and named after the discoverer's niece.

    <span class="mw-page-title-main">1289 Kutaïssi</span> Stony Koronian asteroid

    1289 Kutaïssi is a stony Koronian asteroid from the outer region of the asteroid belt. Discovered by Grigory Neujmin at Simeiz Observatory in 1933, it was later named after the Georgian city of Kutaisi. The S-type asteroid has a rotation period of 3.6 hours and measures approximately 22 kilometers in diameter.

    <span class="mw-page-title-main">1534 Näsi</span> Carbonaceous asteroid

    1534 Näsi, provisional designation 1939 BK, is a carbonaceous asteroid from the middle region of the asteroid belt, approximately 20 kilometers in diameter.

    1523 Pieksämäki, provisional designation 1939 BC, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 9 kilometers in diameter. It was discovered on 18 January 1939, by Finnish astronomer Yrjö Väisälä at the Turku Observatory in Southwest Finland, and named for the town of Pieksämäki.

    References

    1. 1 2 3 4 5 "1245 Calvinia (1932 KF)". Minor Planet Center. Retrieved 15 December 2018.
    2. 1 2 3 4 Schmadel, Lutz D. (2007). "(1245) Calvinia". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 103. doi:10.1007/978-3-540-29925-7_1246. ISBN   978-3-540-00238-3.
    3. 1 2 3 4 5 "JPL Small-Body Database Browser: 1245 Calvinia (1932 KF)" (2018-10-20 last obs.). Jet Propulsion Laboratory . Retrieved 15 December 2018.
    4. 1 2 3 4 5 6 7 8 "Asteroid 1245 Calvinia". Small Bodies Data Ferret. Retrieved 15 December 2018.
    5. 1 2 "Asteroid (1245) Calvinia – Proper elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 14 December 2018.
    6. 1 2 3 4 5 6 "LCDB Data for (1245) Calvinia". Asteroid Lightcurve Database (LCDB). Retrieved 15 December 2018.
    7. 1 2 3 4 Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System – IRAS-A-FPA-3-RDR-IMPS-V6.0: IRAS–A–FPA–3–RDR–IMPS–V6.0. Bibcode:2004PDSS...12.....T . Retrieved 15 December 2018.
    8. 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: EAR–A–COMPIL–5–NEOWISEDIAM–V1.0. Bibcode:2016PDSS..247.....M . Retrieved 15 December 2018.
    9. 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. S2CID   119293330.
    10. 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. S2CID   35447010. (catalog)
    11. 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)
    12. 1 2 3 Behrend, Raoul. "Asteroids and comets rotation curves – (1245) Calvinia". Geneva Observatory. Retrieved 15 December 2018.
    13. ↑ Slivan, Stephen M.; Binzel, Richard P.; Boroumand, Shaida C.; Pan, Margaret W.; Simpson, Christine M.; Tanabe, James T.; et al. (May 2008). "Rotation rates in the Koronis family, complete to H≈11.2". Icarus. 195 (1): 226–276. Bibcode:2008Icar..195..226S. doi:10.1016/j.icarus.2007.11.019.
    14. 1 2 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.
    15. ↑ Brines, Pedro; Lozano, Juan; Rodrigo, Onofre; Fornas, A.; Herrero, David; Mas, Vicente; et al. (April 2017). "Sixteen Asteroids Lightcurves at Asteroids Observers (OBAS) - MPPD: 2016 June-November" (PDF). Minor Planet Bulletin. 44 (2): 145–149. Bibcode:2017MPBu...44..145B. ISSN   1052-8091. Archived from the original (PDF) on 22 March 2020. Retrieved 15 March 2020.
    16. ↑ Lagerkvist, C.-I. (March 1978). "Photographic photometry of 110 main-belt asteroids". Astronomy and Astrophysics Supplement Series. 31: 361–381. Bibcode:1978A&AS...31..361L.
    17. ↑ Lagerkvist, C.-I. (December 1977). "Photographic Photometry of the Asteroids 716 Berkeley and 1245 Calvinia". Astronomy and Astrophysics Supplement. 34: 203. Bibcode:1978A&AS...34..203L.
    18. ↑ Erikson, A. (December 1989). "Improvement of Rotation Periods for the Asteroids 12 Victoria, 173 Ino and 1245 Calvinia". Asteroids: 55. Bibcode:1990acm..proc...55E.
    19. ↑ Durech, J.; Hanus, J.; Oszkiewicz, D.; Vanco, R. (March 2016). "Asteroid models from the Lowell photometric database". Astronomy and Astrophysics. 587: 6. arXiv: 1601.02909 . Bibcode:2016A&A...587A..48D. doi:10.1051/0004-6361/201527573. S2CID   118427201.
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