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词条 1245 Calvinia
释义

  1. Orbit and classification

  2. Naming

  3. Physical characteristics

      Rotation period    Diameter and albedo  

  4. References

  5. External links

{{Infobox planet
| minorplanet = yes
| name = 1245 Calvinia
| background = #D6D6D6
| image =
| image_size =
| caption =
| discovery_ref =  [1]
| discoverer = C. Jackson
| discovery_site = Johannesburg Obs.
| discovered = 26 May 1932
| mpc_name = (1245) Calvinia
| alt_names = 1932 KF{{·}}1948 VT
1950 CP{{·}}A906 FB
A914 YB{{·}}A916 DC
A917 KE
| pronounced =
| named_after = Calvinia [2]
{{small|(South African city)}}
| mp_category = main-belt [1]{{·}}{{small|(outer)}}
{{nowrap|background [5]{{·}}Koronis [5][7][8]}}
| orbit_ref =  
| epoch = 27 April 2019 (JD 2458600.5)
| uncertainty = 0
| observation_arc = 112.59 yr (41,125 d)
| aphelion = 3.1302 AU
| perihelion = 2.6536 AU
| semimajor = 2.8919 AU
| eccentricity = 0.0824
| period = 4.92 yr (1,796 d)
| mean_anomaly = 137.36°
| mean_motion = {{Deg2DMS|0.2004|sup=ms}} / day
| inclination = 2.8936°
| asc_node = 151.72°
| arg_peri = 208.24°
| mean_diameter = {{val|26.84|3.5|ul=km}}[10]
{{val|29.751|0.204|u=km}}[11][12]
{{val|30.444|0.137|u=km}}[13]
{{val|30.95|0.78|u=km}}[14]
| rotation = {{val|4.8523|0.0001|ul=h}}[15]
| albedo = {{val|0.214}}[14]
{{val|0.2202}}[13]
{{val|0.221}}[11][12]
{{val|0.2713}}[10]
| spectral_type = Tholen {{=}} S [8]
B–V {{=}} 0.847[5]
U–B {{=}} 0.474[5]
| abs_magnitude = 9.89[10][11][13][14]
9.9[1][8]
{{val|10.11|0.03}}[32]
}}1245 Calvinia, provisional designation {{mp|1932 KF}}, is a stony Koronian asteroid from the outer regions of the asteroid belt, approximately {{convert|30|km|mi|abbr=off|sigfig=2|sp=us}} 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.[8] It was named for the city of Calvinia in South Africa.[2]

Orbit and classification

According to Zappalà, Mothé-Diniz, as well as Milani and Knežević, Calvinia is a member of the Koronis family ({{small|605}}),[5][7] a very large outer asteroid family with nearly co-planar ecliptical orbits.[38] 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.[5]

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. The asteroid was first observed as {{mp|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 {{MoMP|1245|naming citation}} was mentioned in The Names of the Minor Planets by Paul Herget in 1955 ({{small|H 115}}).[2]

Physical characteristics

In the Tholen classification, Calvinia is a common stony S-type asteroid,[5] which is also the overall spectral type for members of the Koronis family.[38]{{rp|23}} In the Barucci taxonomy (1987), it is an S0-type asteroid.[5]

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 {{val|4.8523|0.0001}} hours with a brightness variation of 0.28 magnitude ({{small|U=3}}).[15]

Other rotational were obtained by (ordered by increasing period determinations ) Brines (4.73 h; Δ0.35 mag; U=3-) in 2016,[48] by Lagerkvist (4.8 h; Δ0.52 mag; U=2) and (4.85 h; Δ0.7 mag; U=2) in 1975 and 1978,[49][50] respectively, by Erikson (4.84 h; U=3) in 1990,[51] by Slivan (4.8512 h; Δ0.37 mag; U=3) in 2002, by Roy (4.85129 h; Δ0.50 mag; U=3-),[15] and by Tedesco (4.855 h; Δ0.63 mag; U=3) in 1979.[8]

A modeled lightcurve using photometric data from the Lowell Photometric Database was published in 2016. It gave a concurring period of {{val|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).[54]

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.[10][11][12][13][14] 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.[8]

References

1. ^1 2 3 4 {{cite book |title = Dictionary of Minor Planet Names – (1245) Calvinia |last = Schmadel | first = Lutz D. |publisher = Springer Berlin Heidelberg |page = 103 |date = 2007 |isbn = 978-3-540-00238-3 |doi = 10.1007/978-3-540-29925-7_1246 |chapter = (1245) Calvinia }}
2. ^1 2 3 4 5 {{cite web |title = 1245 Calvinia (1932 KF) |work = Minor Planet Center |url = https://www.minorplanetcenter.net/db_search/show_object?object_id=1245 |accessdate = 15 December 2018}}
3. ^1 2 3 {{cite web |title = Asteroids and comets rotation curves – (1245) Calvinia |last = Behrend |first = Raoul |publisher = Geneva Observatory |url = http://obswww.unige.ch/~behrend/page3cou.html#001245 |accessdate = 15 December 2018}}
4. ^1 2 3 {{cite journal |display-authors = 6 |first1 = Joseph R. |last1 = Masiero |first2 = T. |last2 = Grav |first3 = A. K. |last3 = Mainzer |first4 = C. R. |last4 = Nugent |first5 = J. M. |last5 = Bauer |first6 = R. |last6 = Stevenson |first7 = S. |last7 = Sonnett |date = August 2014 |title = Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos |journal = The Astrophysical Journal |volume = 791 |issue = 2 |page = 11 |bibcode = 2014ApJ...791..121M |doi = 10.1088/0004-637X/791/2/121 |arxiv = 1406.6645 }}
5. ^1 2 {{cite web |title = Asteroid (1245) Calvinia – Proper elements |publisher = AstDyS-2, Asteroids – Dynamic Site |url = http://hamilton.dm.unipi.it/astdys/index.php?n=1245&pc=1.1.6 |accessdate = 14 December 2018}}
6. ^1 2 3 4 5 6 7 8 {{cite web |title = Asteroid 1245 Calvinia |work = Small Bodies Data Ferret |url = https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1245+Calvinia |accessdate = 15 December 2018}}
7. ^1 2 {{Cite book |first1 = D. |last1 = Nesvorný |first2 = M. |last2 = Broz |first3 = V. |last3 = Carruba |date = December 2014 |title = Identification and Dynamical Properties of Asteroid Families |journal = Asteroids IV |pages = 297–321 |bibcode = 2015aste.book..297N |doi = 10.2458/azu_uapress_9780816532131-ch016 |arxiv = 1502.01628 |isbn = 9780816532131 }}
8. ^1 2 3 4 5 6 {{cite web |title = LCDB Data for (1245) Calvinia |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=1245%7CCalvinia |accessdate = 15 December 2018}}
9. ^1 2 3 4 {{cite journal |display-authors = 6 |first1 = A. K. |last1 = Mainzer |first2 = J. M. |last2 = Bauer |first3 = R. M. |last3 = Cutri |first4 = T. |last4 = Grav |first5 = E. A. |last5 = Kramer |first6 = J. R. |last6 = Masiero |first7 = C. R. |last7 = Nugent |first8 = S. M. |last8 = Sonnett |first9 = R. A. |last9 = Stevenson |first10 = E. L. |last10 = Wright |date = June 2016 |title = NEOWISE Diameters and Albedos V1.0 |url = https://sbnarchive.psi.edu/pds3/non_mission/EAR_A_COMPIL_5_NEOWISEDIAM_V1_0/data/neowise_mainbelt.tab |journal = NASA Planetary Data System |pages = EAR–A–COMPIL–5–NEOWISEDIAM–V1.0 |bibcode = 2016PDSS..247.....M |access-date= 15 December 2018}}
10. ^1 2 3 4 {{cite journal |display-authors = 6 |first1 = Fumihiko |last1 = Usui |first2 = Daisuke |last2 = Kuroda |first3 = Thomas G. |last3 = Müller |first4 = Sunao |last4 = Hasegawa |first5 = Masateru |last5 = Ishiguro |first6 = Takafumi |last6 = Ootsubo |first7 = Daisuke |last7 = Ishihara |first8 = Hirokazu |last8 = Kataza |first9 = Satoshi |last9 = Takita |first10 = Shinki |last10 = Oyabu |first11 = Munetaka |last11 = Ueno |first12 = Hideo |last12 = Matsuhara |first13 = Takashi |last13 = Onaka |date = October 2011 |title = Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey |url = http://pasj.oxfordjournals.org/content/63/5/1117.full.pdf+html |journal = Publications of the Astronomical Society of Japan |volume = 63 |issue = 5 |pages = 1117–1138 |bibcode = 2011PASJ...63.1117U |doi = 10.1093/pasj/63.5.1117 |access-date= 15 December 2018}} (online, [https://core.ac.uk/download/pdf/43545172.pdf AcuA catalog p. 153])
11. ^1 2 3 4 {{cite journal |first1 = E. F. |last1 = Tedesco |first2 = P. V. |last2 = Noah |first3 = M. |last3 = Noah |first4 = S. D. |last4 = Price |date = October 2004 |title = IRAS Minor Planet Survey V6.0 |url = https://sbnarchive.psi.edu/pds3/iras/IRAS_A_FPA_3_RDR_IMPS_V6_0/data/diamalb.tab |journal = NASA Planetary Data System – IRAS-A-FPA-3-RDR-IMPS-V6.0 |pages = IRAS–A–FPA–3–RDR–IMPS–V6.0 |bibcode = 2004PDSS...12.....T |access-date= 15 December 2018}}
12. ^1 2 3 4 {{cite journal |display-authors = 6 |first1 = A. |last1 = Mainzer |first2 = T. |last2 = Grav |first3 = J. |last3 = Masiero |first4 = E. |last4 = Hand |first5 = J. |last5 = Bauer |first6 = D. |last6 = Tholen |first7 = R. S. |last7 = McMillan |first8 = T. |last8 = Spahr |first9 = R. M. |last9 = Cutri |first10 = E. |last10 = Wright |first11 = J. |last11 = Watkins |first12 = W. |last12 = Mo |first13 = C. |last13 = Maleszewski |date = November 2011 |title = NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results |journal = The Astrophysical Journal |volume = 741 |issue = 2 |page = 25 |bibcode = 2011ApJ...741...90M |doi = 10.1088/0004-637X/741/2/90 |arxiv = 1109.6407 }} (catalog)
13. ^1 {{Cite journal |author = Lagerkvist, C.-I. |date = March 1978 |title = Photographic photometry of 110 main-belt asteroids |journal = Astronomy and Astrophysics Supplement Series |volume = 31 |pages = 361–381 |bibcode = 1978A&AS...31..361L }}
14. ^1 {{Cite journal |author = Lagerkvist, C.-I. |date = December 1977 |title = Photographic Photometry of the Asteroids 716 Berkeley and 1245 Calvinia |journal = Astronomy and Astrophysics Supplement |volume = 34 |pages = 203 |bibcode = 1978A&AS...34..203L }}
15. ^1 {{Cite journal |author = Erikson, A. |date = December 1989 |title = Improvement of Rotation Periods for the Asteroids 12 Victoria, 173 Ino and 1245 Calvinia |journal = Asteroids |page = 55 |bibcode = 1990acm..proc...55E }}
16. ^1 {{Cite journal |display-authors = 6 |first1 = Stephen M. |last1 = Slivan |first2 = Richard P. |last2 = Binzel |first3 = Shaida C. |last3 = Boroumand |first4 = Margaret W. |last4 = Pan |first5 = Christine M. |last5 = Simpson |first6 = James T. |last6 = Tanabe |first7 = Rosalinda M. |last7 = Villastrigo |first8 = Lesley L. |last8 = Yen |first9 = Richard P. |last9 = Ditteon |first10 = Donald P. |last10 = Pray |first11 = Robert D. |last11 = Stephens |date = May 2008 |title = Rotation rates in the Koronis family, complete to H≈11.2 |journal = Icarus |volume = 195 |issue = 1 |pages = 226–276 |bibcode = 2008Icar..195..226S |doi = 10.1016/j.icarus.2007.11.019 }}
17. ^1 {{cite journal |first1 = J. |last1 = Durech |first2 = J. |last2 = Hanus |first3 = D. |last3 = Oszkiewicz |first4 = R. |last4 = Vanco |date = March 2016 |title = Asteroid models from the Lowell photometric database |journal = Astronomy and Astrophysics |volume = 587 |page = 6 |bibcode = 2016A&A...587A..48D |doi = 10.1051/0004-6361/201527573 |arxiv = 1601.02909 }}
18. ^1 {{Cite journal |display-authors = 6 |first1 = Pedro |last1 = Brines |first2 = Juan |last2 = Lozano |first3 = Onofre |last3 = Rodrigo |first4 = A. |last4 = Fornas |first5 = David |last5 = Herrero |first6 = Vicente |last6 = Mas |first7 = G. |last7 = Fornas |last8 = Carreñ |first9 = A. |last9 = o |first10 = Enrique |last10 = Arce |date = April 2017 |title = Sixteen Asteroids Lightcurves at Asteroids Observers (OBAS) - MPPD: 2016 June-November |journal = The Minor Planet Bulletin |volume = 44 |issue = 2 |pages = 145–149 |issn = 1052-8091 |bibcode = 2017MPBu...44..145B }}
[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]

}}

External links

  • Asteroid Lightcurve Database (LCDB), query form (info)
  • [https://books.google.com/books?id=aeAg1X7afOoC&pg Dictionary of Minor Planet Names], Google books
  • Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
  • [https://www.minorplanetcenter.net/iau/lists/NumberedMPs000001.html Discovery Circumstances: Numbered Minor Planets (1)-(5000)] – Minor Planet Center
  • {{AstDys|1245}}
  • {{JPL small body}}
{{Use dmy dates|date=December 2018}}{{Minor planets navigator |1244 Deira |number=1245 |1246 Chaka}}{{Small Solar System bodies}}{{DEFAULTSORT:Calvinia}}

7 : Koronis asteroids|Background asteroids|Discoveries by Cyril V. Jackson|Minor planets named for places|Named minor planets|S-type asteroids (Tholen)|Astronomical objects discovered in 1932
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