1817 Katanga

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1817 Katanga
Discovery [1]
Discovered by C. Jackson
Discovery site Johannesburg Obs.
Discovery date20 June 1939
Designations
(1817) Katanga
Named after
 Katanga Province
(Congo, Dem. Rep.) [2]
1939 MB ·1928 KD
1950 NK ·1971 BG
main-belt  · Phocaea [3]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 77.58 yr (28,337 days)
Aphelion 2.8258 AU
Perihelion 1.9172 AU
2.3715 AU
Eccentricity 0.1916
3.65 yr (1,334 days)
173.17°
0° 16m 11.64s / day
Inclination 25.709°
88.723°
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]
6.35±0.02 h [7]
7.2165±0.0003 h [8]
8.481±0.003 h [9]
0.1331±0.018(IRAS:14) [6]
0.2421 (derived) [3]
0.342±0.151 [5]
0.353±0.089 [4]
S [3]
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]

    Contents

    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 ( U=3 ). [9] The quality of this result supersedes two periods previously obtained by astronomers Stefano Sposetti and Glenn Malcolm in May and June 2001, respectively ( U=2/2 ). [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]

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    References

    1. 1 2 3 4 "JPL Small-Body Database Browser: 1817 Katanga (1939 MB)" (2017-01-18 last obs.). Jet Propulsion Laboratory . Retrieved 1 July 2017.
    2. 1 2 3 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. 1 2 3 4 5 6 "LCDB Data for (1817) Katanga". Asteroid Lightcurve Database (LCDB). Retrieved 15 December 2016.
    4. 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)
    5. 1 2 3 4 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 15 December 2016.
    6. 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. 12: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T . Retrieved 22 October 2019.
    7. 1 2 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 . Retrieved 15 December 2016.
    8. 1 2 Behrend, Raoul. "Asteroids and comets rotation curves – (1817) Katanga". Geneva Observatory . Retrieved 15 December 2016.
    9. 1 2 Warner, Brian D. (October 2008). "Asteroid Lightcurve Analysis at the Palmer Divide Observatory: February-May 2008". The Minor Planet Bulletin. 35 (4): 163–166. Bibcode:2008MPBu...35..163W. ISSN   1052-8091 . Retrieved 15 December 2016.
    10. 1 2 "1817 Katanga (1939 MB)". Minor Planet Center. Retrieved 15 December 2016.
    11. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 15 December 2016.
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