Astronomy:1817 Katanga

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1817 Katanga
Discovery[1]
Discovered byC. Jackson
Discovery siteJohannesburg Obs.
Discovery date20 June 1939
Designations
(1817) Katanga
Named afterKatanga Province
(Congo, Dem. Rep.)[2]
1939 MB · 1928 KD
1950 NK · 1971 BG
Minor planet categorymain-belt · Phocaea[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc77.58 yr (28,337 days)
|{{{apsis}}}|helion}}2.8258 AU
|{{{apsis}}}|helion}}1.9172 AU
2.3715 AU
Eccentricity0.1916
Orbital period3.65 yr (1,334 days)
Mean anomaly173.17°
Mean motion0° 16m 11.64s / day
Inclination25.709°
Longitude of ascending node88.723°
140.27°
Physical characteristics
Dimensions9.76±1.21 km[4]
15.89±1.56 km[5]
15.90±1.0 km (IRAS:14)[6]
16.28 km (derived)[3]
Rotation period6.35±0.02 h[7]
7.2165±0.0003 h[8]
8.481±0.003 h[9]
Geometric albedo0.1331±0.018 (IRAS:14)[6]
0.2421 (derived)[3]
0.342±0.151[5]
0.353±0.089[4]
S[3]
Absolute magnitude (H)10.78[5] · 11.1[1][3] · 11.80[4][6] ·


1817 Katanga, provisional designation 1939 MB, is a stony Phocaea asteroid in from the inner regions of the asteroid belt, approximately 16 kilometers in diameter. It was discovered on 20 June 1939, by English-born South African astronomer Cyril Jackson at Johannesburg Observatory in South Africa.[10] It is named for the Katanga Province.[2]

Orbit and classification

The S-type asteroid is a member of the Phocaea family, a smaller population of asteroids with similar orbital characteristics named after their largest member, 25 Phocaea. Katanga orbits the Sun in the inner main-belt at a distance of 1.9–2.8 AU once every 3 years and 8 months (1,334 days). Its orbit has an eccentricity of 0.19 and an inclination of 26° with respect to the ecliptic.[1] Katanga's observation arc begins with its official discovery observation in 1939, as its first observation made at Heidelberg Observatory in 1928, remained unused (1928 KD).[10]

Lightcurves

In April 2008, a rotational lightcurve of Katanga was obtained from photometric observations by American astronomer Brian D. Warner at his Palmer Divide Observatory in Colorado. It gave a rotation period of 8.481 hours with a brightness variation of 0.30 magnitude ({{{1}}}).[9] The quality of this result supersedes two periods previously obtained by astronomers Stefano Sposetti and Glenn Malcolm in May and June 2001, respectively ({{{1}}}).[7][8]

Diameter and albedo

According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Katanga measures between 9.76 and 15.90 kilometers in diameter, and its surface has an albedo between 0.133 and 0.353.[4][5][6] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.242 and a diameter of 16.28 kilometers with an absolute magnitude of 11.1.[3]

Naming

This minor planet was named after the Katanga Province, a rich mining region in the Democratic Republic of the Congo in Central Africa.[2] The approved naming citation was published by the Minor Planet Center on 1 February 1980 (M.P.C. 5183).[11]

References

  1. ↑ 1.0 1.1 1.2 1.3 "JPL Small-Body Database Browser: 1817 Katanga (1939 MB)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001817. Retrieved 1 July 2017. 
  2. ↑ 2.0 2.1 2.2 Schmadel, Lutz D. (2007). "(1817) Katanga". Dictionary of Minor Planet Names – (1817) Katanga. Springer Berlin Heidelberg. p. 145. doi:10.1007/978-3-540-29925-7_1818. ISBN 978-3-540-00238-3. 
  3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 "LCDB Data for (1817) Katanga". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=1817%7CKatanga. Retrieved 15 December 2016. 
  4. ↑ 4.0 4.1 4.2 4.3 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. doi:10.1093/pasj/63.5.1117. Bibcode: 2011PASJ...63.1117U.  (online, AcuA catalog p. 153)
  5. ↑ 5.0 5.1 5.2 5.3 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. doi:10.1088/2041-8205/759/1/L8. Bibcode: 2012ApJ...759L...8M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012ApJ...759L...8M. Retrieved 15 December 2016. 
  6. ↑ 6.0 6.1 6.2 6.3 Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System 12: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode: 2004PDSS...12.....T. https://sbnarchive.psi.edu/pds3/iras/IRAS_A_FPA_3_RDR_IMPS_V6_0/data/diamalb.tab. Retrieved 22 October 2019. 
  7. ↑ 7.0 7.1 Malcolm, G. (June 2002). "Rotational Periods and Lightcurves of 445 Edna, 1817 Katanga and 1847 Stobbe". The Minor Planet Bulletin 29: 28–29. Bibcode: 2002MPBu...29...28M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002MPBu...29...28M. Retrieved 15 December 2016. 
  8. ↑ 8.0 8.1 Behrend, Raoul. "Asteroids and comets rotation curves – (1817) Katanga". Geneva Observatory. http://obswww.unige.ch/~behrend/page4cou.html#001817. Retrieved 15 December 2016. 
  9. ↑ 9.0 9.1 Warner, Brian D. (October 2008). "Asteroid Lightcurve Analysis at the Palmer Divide Observatory: February-May 2008". The Minor Planet Bulletin 35 (4): 163–166. ISSN 1052-8091. Bibcode: 2008MPBu...35..163W. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2008MPBu...35..163W. Retrieved 15 December 2016. 
  10. ↑ 10.0 10.1 "1817 Katanga (1939 MB)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=1817. Retrieved 15 December 2016. 
  11. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html. Retrieved 15 December 2016. 

External links



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