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1570 Brunonia

From Wikipedia, the free encyclopedia
Stony asteroid of the Koronis family

1570 Brunonia
Discovery[1]
Discovered byS. Arend
Discovery siteUccle Obs.
Discovery date9 October 1948
Designations
(1570) Brunonia
Named after
Brown University[2][3]
1948 TX · 1952 QE1
main-belt[1][4] · (outer)
Koronis[5][6][7]
Orbital characteristics[4]
Epoch 27 April 2019 (JD 2458600.5)
Uncertainty parameter 0
Observation arc69.89yr (25,529 d)
Aphelion3.0028AU
Perihelion2.6888 AU
2.8458 AU
Eccentricity0.0552
4.80 yr (1,754 d)
222.99°
0° 12m 19.08s / day
Inclination1.6659°
190.05°
226.15°
Physical characteristics
10.80±1.03 km[8]
12.118±0.272 km[9][10]
12.728±0.058 km[11]
48 h(or longer)[12]
0.166[8]
0.169±0.019[13]
0.1909[11]
0.209[9]
S(SDSS-MOC)[14]
11.90[9][11]
12.0[1][4][7]
12.40[8]

1570 Brunonia, provisional designation1948 TX, is a stonyasteroid of theKoronis family from the outer regions of theasteroid belt, approximately 12 kilometers (7.5 miles) in diameter. It was discovered on 9 October 1948, by Belgian astronomerSylvain Arend at theRoyal Observatory of Belgium in Uccle.[1] TheS-type asteroid is likely elongated and has a longer-than-averagerotation period of more than 48 hours.[7] It was named forBrown University in Rhode Island, United States.[2]

Orbit and classification

[edit]

Brunonia is a core member of theKoronis family (605),[5][6] a very large outerasteroid family with nearly co-planar ecliptical orbits.[7][15] It orbits the Sun in theouter main-belt at a distance of 2.7–3.0 AU once every 4 years and 10 months (1,754 days;semi-major axis of 2.85 AU). Its orbit has aneccentricity of 0.06 and aninclination of 2° with respect to theecliptic.[4] The body'sobservation arc begins at Uccle in November 1948, one month after its official discovery observation.[1]

Naming

[edit]

Thisminor planet was named forBrown University in Providence, Rhode Island. The 7th oldest university in the United States, Brown was chartered in 1764.[1] The officialnaming citation was published by theMinor Planet Center in February 1954 (M.P.C. 1040).[16][3]

Physical characteristics

[edit]

In theSDSS-based taxonomy,Brunonia is a common, stonyS-type asteroid,[14] which agrees with the overallspectral type for members of the Koronis family.[15]: 23 

Rotation period

[edit]

In February 2016, a rotationallightcurve ofBrunonia was obtained fromphotometric observations by theKepler space telescope and itsK2 mission (Uranus Field). Lightcurve analysis gave arotation period of at least 48 hours with a brightness amplitude of more than 0.6magnitude (U=n.a.), indicative of an elongated, non-spherical shape.[7][12]

Diameter and albedo

[edit]

According to the surveys carried out by the JapaneseAkari satellite and theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Brunonia measures between 10.8 and 12.7 kilometers in diameter and its surface has analbedo between 0.166 and 0.209.[8][9][10][11][13] TheCollaborative Asteroid Lightcurve Link assumes an albedo of 0.24 and a diameter of 10.8 kilometers based on anabsolute magnitude of 12.0.[7]

References

[edit]
  1. ^abcdef"1570 Brunonia (1948 TX)".Minor Planet Center. Retrieved11 December 2018.
  2. ^abSchmadel, Lutz D. (2007). "(1570) Brunonia".Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 124.doi:10.1007/978-3-540-29925-7_1571.ISBN 978-3-540-00238-3.
  3. ^abMitchell, Martha (1993)."Brown University Glacier".Encyclopedia Brunoniana. Providence, RI: Brown University Library.ASIN B0006P9F3C. Retrieved11 December 2018.
  4. ^abcd"JPL Small-Body Database Browser: 1570 Brunonia (1948 TX)" (2018-09-01 last obs.).Jet Propulsion Laboratory. Retrieved11 December 2018.
  5. ^ab"Asteroid 1570 Brunonia".Small Bodies Data Ferret. Retrieved11 December 2018.
  6. ^ab"Asteroid (1570) Brunonia – Proper elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved10 December 2018.
  7. ^abcdef"LCDB Data for (1570) Brunonia". Asteroid Lightcurve Database (LCDB). Retrieved11 December 2018.
  8. ^abcdUsui, 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. ^abcdMainzer, 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.247: EAR–A–COMPIL–5–NEOWISEDIAM–V1.0.Bibcode:2016PDSS..247.....M. Retrieved11 December 2018.
  10. ^abMasiero, 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.
  11. ^abcdMainzer, 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)
  12. ^abMolnár, L.; Pál, A.; Sárneczky, K.; Szabó, R.; Vinkó, J.; Szabó, Gy. M.; et al. (February 2018)."Main-belt Asteroids in the K2 Uranus Field".The Astrophysical Journal Supplement Series.234 (2): 10.arXiv:1706.06056.Bibcode:2018ApJS..234...37M.doi:10.3847/1538-4365/aaa1a1.S2CID 119423034.
  13. ^abMasiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids".The Astrophysical Journal Letters.759 (1): 5.arXiv:1209.5794.Bibcode:2012ApJ...759L...8M.doi:10.1088/2041-8205/759/1/L8.S2CID 46350317.
  14. ^abCarvano, J. M.; Hasselmann, P. H.; Lazzaro, D.; Mothé-Diniz, T. (February 2010)."SDSS-based taxonomic classification and orbital distribution of main belt asteroids".Astronomy and Astrophysics.510: 12.Bibcode:2010A&A...510A..43C.doi:10.1051/0004-6361/200913322. Retrieved30 October 2019.(PDS data set)
  15. ^abNesvorný, 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.
  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.Bibcode:2009dmpn.book.....S.doi:10.1007/978-3-642-01965-4.ISBN 978-3-642-01964-7.

External links

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