2145 Blaauw

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2145 Blaauw
Discovery  [1]
Discovered by R. M. West
Discovery site La Silla Obs.
Discovery date24 October 1976
Designations
(2145) Blaauw
Named after
 Adriaan Blaauw   [2]
(Dutch astronomer)
1976 UF ·1929 XS
1963 RK ·1980 TW
main-belt  ·(outer)  [1] [3]
Ursula   [4]
Orbital characteristics   [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 41.02 yr (14,983 days)
Aphelion 3.5269 AU
Perihelion 2.9059 AU
3.2164 AU
Eccentricity 0.0965
5.77 yr (2,107 days)
314.16°
0° 10m 15.24s / day
Inclination 15.013°
264.34°
279.04°
Physical characteristics
Dimensions34.06 km (derived) [3]
37.11±0.53 km [5]
38.00±10.68 km [6]
40.549±0.848 km [7]
40.55±0.85 km [7]
12.141±0.003 h [8]
0.051±0.011 [7]
0.06±0.04 [6]
0.0665 (derived) [3]
0.076±0.002 [5]
C (assumed) [3]
10.60 [5]  ·10.80 [6] [7]  ·10.83±0.34 [9]  ·10.9 [1] [3]

    2145 Blaauw, provisional designation 1976 UF, is a dark Ursula asteroid from the outer regions of the asteroid belt, approximately 38 kilometers in diameter. It was discovered on 24 October 1976, by astronomer Richard Martin West at the La Silla Observatory in northern Chile. [10] The asteroid was named after Dutch astronomer Adriaan Blaauw. [2]

    Contents

    Orbit and classification

    Blaauw is a member of the Ursula family ( 631 ), [4] a large family of C- and X-type asteroids, named after its parent body, 375 Ursula. [11] It orbits the Sun in the outer asteroid belt at a distance of 2.9–3.5  AU once every 5 years and 9 months (2,107 days; semi-major axis of 3.22 AU). Its orbit has an eccentricity of 0.10 and an inclination of 15° with respect to the ecliptic. [1]

    The asteroid was first identified as 1929 XS at Lowell Observatory in December 1929. The body's observation arc begins with its identification as 1963 RK at the Karl Schwarzschild Observatory in September 1963, or 13 years prior to its official discovery observation at La Silla. [10]

    Physical characteristics

    Blaauw is an assumed, carbonaceous C-type asteroid. [3]

    Rotation period

    Photometric measurements made from the Oakley Southern Sky Observatory during 2012 gave a lightcurve with a period of 12.141 ± 0.003 hours and a variation in brightness of 0.18 ± 0.03 in magnitude ( U=2+ ). [8]

    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, Blaauw measures between 37.11 and 40.55 kilometers in diameter and its surface has an albedo between 0.051 and 0.076. [5] [6] [7]

    The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0665 and a diameter of 34.06 kilometers based on an absolute magnitude of 10.9. [3]

    Naming

    This minor planet was named after Dutch astronomer Adriaan Blaauw (1914–2010), who was director of the European Southern Observatory (1970–74), president of the International Astronomical Union (1976–79) and professor at the Leiden Observatory (1975–1981). His study included the structure of the Milky Way and stellar kinematics and associations. [2] The official naming citation was published by the Minor Planet Center on 1 July 1979 ( M.P.C. 4788). [12]

    Related Research Articles

    <span class="mw-page-title-main">375 Ursula</span> Main-belt asteroid

    Ursula, provisional designation 1893 AL, is a dark asteroid and parent body of the Ursula family from the outer regions of the asteroid belt. It is one of the largest asteroids with a diameter of approximately 200 kilometers. It was discovered on 18 September 1893, by French astronomer Auguste Charlois at Nice Observatory in France. The referent of the asteroids's name is unknown.

    Athalia, provisional designation 1903 ME, is a carbonaceous Themistian asteroid from the outer regions of the asteroid belt, approximately 40 kilometers in diameter. It was discovered on 20 September 1903, by German astronomer Max Wolf at the Heidelberg Observatory in southwest Germany. The asteroid was named after the ancient Judahite queen Athaliah.

    606 Brangäne, provisional designation 1906 VB, is an asteroid from the central regions of the asteroid belt, approximately 36 kilometers in diameter. It was discovered on 18 September 1906, by astronomer August Kopff at the Heidelberg Observatory in southwest Germany. The unusual K-type asteroid is the namesake of the small Brangäne family and has a rotation period of 12.3 hours. It was named after Brangaine, a character from the opera Tristan und Isolde by Richard Wagner.

    <span class="mw-page-title-main">1073 Gellivara</span> Asteroid

    1073 Gellivara, provisional designation 1923 OW, is a dark Themistian asteroid, approximately 27 kilometers in diameter, located in the outer regions of the asteroid belt. It was discovered by Austrian astronomer Johann Palisa at the Vienna Observatory on 14 September 1923, and later named after the Swedish town of Gällivare.

    1026 Ingrid, provisional designation 1923 NY, is a stony Florian asteroid and long-lost minor planet (1923–1986) from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered by Karl Reinmuth at Heidelberg in 1923, and later named after Ingrid, niece and godchild of astronomer Albrecht Kahrstedt.

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

    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.

    9298 Geake, provisional designation 1985 JM, is a Mitidika asteroid from the central regions of the asteroid belt, approximately 12 kilometers in diameter. It was discovered on 15 May 1985, by American astronomer Edward Bowell at Lowell Observatory's Anderson Mesa Station near Flagstaff, Arizona, United States. The asteroid was named for British astronomer John E. Geake.

    1308 Halleria, provisional designation 1931 EB, is a carbonaceous Charis asteroid from the outer regions of the asteroid belt, approximately 43 kilometers in diameter. It was discovered on 12 March 1931, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory. The asteroid was named after Albrecht von Haller a Swiss physician, botanist and poet.

    1372 Haremari, provisional designation 1935 QK, is a rare-type Watsonian asteroid and a suspected trojan of Ceres from the central regions of the asteroid belt, approximately 26 kilometers in diameter. It was discovered on 31 August 1935, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany. The asteroid was named for all female staff members of the Astronomical Calculation Institute.

    1520 Imatra, provisional designation 1938 UY, is a carbonaceous Ursula asteroid from the outer region of the asteroid belt, approximately 54 kilometers in diameter. It was discovered on 22 October 1938, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland, who named after the Finnish town of Imatra.

    1384 Kniertje, provisional designation 1934 RX, is a dark Adeonian asteroid from the central regions of the asteroid belt, approximately 26 kilometers in diameter. It was discovered on 9 September 1934, by Dutch astronomer Hendrik van Gent at the Union Observatory in Johannesburg, South Africa. The asteroid was named after a character in the Dutch play Op Hoop van Zegen by Herman Heijermans.

    1303 Luthera, provisional designation 1928 FP, is a dark asteroid and the parent body of the Luthera family, located in the outermost regions of the asteroid belt. It measures approximately 90 kilometers in diameter. The asteroid was discovered on 16 March 1928, by astronomer Friedrich Schwassmann at the Bergedorf Observatory in Hamburg, Germany, and later named after German astronomer Robert Luther.

    <span class="mw-page-title-main">1332 Marconia</span>

    1332 Marconia, provisional designation 1934 AA, is a dark asteroid and the parent body of the Marconia family located in the outer regions of the asteroid belt. It measures approximately 46 kilometers in diameter. The asteroid was discovered on 9 January 1934, by Italian astronomer Luigi Volta at the Observatory of Turin in Pino Torinese, northern Italy. It was named for Italian electrical engineer Guglielmo Marconi. The uncommon L-type asteroid has a rotation period of 19.2 hours.

    1499 Pori, provisional designation 1938 UF, is a stony Eunomian asteroid from the central regions of the asteroid belt, approximately 15 kilometers in diameter. It was discovered on 16 October 1938, by Finnish astronomer Yrjö Väisälä at the Turku Observatory in southwest Finland. The asteroid was named after the Finnish city of Pori.

    1238 Predappia, provisional designation 1932 CA, is a dark Adeonian asteroid from the central regions of the asteroid belt, approximately 21 kilometers in diameter. It was discovered on 4 February 1932, by astronomer Luigi Volta at the Observatory of Turin in Pino Torinese, Italy. It was later named after the Italian village of Predappio.

    1416 Renauxa, provisional designation 1937 EC, is an Eon asteroid from the outer regions of the asteroid belt, approximately 29 kilometers in diameter. It was discovered on 4 March 1937, by French astronomer Louis Boyer at the Algiers Observatory in Algeria, North Africa. It was named after Joseph Renaux, an astronomer at the discovering observatory.

    1306 Scythia, provisional designation 1930 OB, is a dark Ursula asteroid from the outer regions of the asteroid belt, approximately 72 kilometers in diameter. It was discovered on 22 July 1930, by Soviet astronomer Grigory Neujmin at the Simeiz Observatory on the Crimean peninsula. The asteroid was named for the historic region of Scythia.

    5771 Somerville, provisional designation 1987 ST1, is a carbonaceous Lixiaohua asteroid from the outer regions of the asteroid belt, approximately 26 kilometers in diameter. It was discovered on 21 September 1987, by American astronomer Edward Bowell at the Anderson Mesa Station of the Lowell Observatory in Flagstaff, Arizona. The asteroid was named for Scottish polymath Mary Somerville.

    4176 Sudek, provisional designation 1987 DS, is a Themistian asteroid from the outer regions of the asteroid belt, approximately 17 kilometers in diameter. It was discovered on 24 February 1987, by Czech astronomer Antonín Mrkos at the Kleť Observatory in the Czech Republic. The presumed C-type asteroid has a rotation period of 8.16 hours. It was named in memory of Czech photographer Josef Sudek.

    1302 Werra, provisional designation 1924 SV, is a Themistian asteroid from the outer regions of the asteroid belt, approximately 30 kilometers in diameter. It was discovered on 28 September 1924, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory. The asteroid was named for the river Werra in central Germany.

    References

    1. 1 2 3 4 5 "JPL Small-Body Database Browser: 2145 Blaauw (1976 UF)" (2017-11-01 last obs.). Jet Propulsion Laboratory . Retrieved 6 December 2017.
    2. 1 2 3 Schmadel, Lutz D. (2007). "(2145) Blaauw". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 174. doi:10.1007/978-3-540-29925-7_2146. ISBN   978-3-540-00238-3.
    3. 1 2 3 4 5 6 7 "LCDB Data for (2145) Blaauw". Asteroid Lightcurve Database (LCDB). Retrieved 6 December 2017.
    4. 1 2 "Asteroid 2145 Blaauw – Nesvorny HCM Asteroid Families V3.0". Small Bodies Data Ferret. Retrieved 26 October 2019.
    5. 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)
    6. 1 2 3 4 Nugent, C. R.; Mainzer, A.; Masiero, J.; Bauer, J.; Cutri, R. M.; Grav, T.; et al. (December 2015). "NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos". The Astrophysical Journal. 814 (2): 13. arXiv: 1509.02522 . Bibcode:2015ApJ...814..117N. doi:10.1088/0004-637X/814/2/117 . Retrieved 6 December 2017.
    7. 1 2 3 4 5 Masiero, 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 . Retrieved 6 December 2017.
    8. 1 2 Moravec, Patricia; Cochren, Joseph; Gerhardt, Michael; Harris, Andrew; Karnemaat, Ryan; Melton, Elizabeth; et al. (October 2012). "Asteroid Lightcurve Analysis at the Oakley Southern Sky Observatory: 2012 January-April". The Minor Planet Bulletin. 39 (4): 213–216. Bibcode:2012MPBu...39..213M. ISSN   1052-8091 . Retrieved 6 December 2017.
    9. ↑ 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 6 December 2017.
    10. 1 2 "2145 Blaauw (1976 UF)". Minor Planet Center. Retrieved 6 December 2017.
    11. ↑ 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.
    12. ↑ 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.
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