1397 Umtata

Last updated

1397 Umtata
Discovery [1]
Discovered by C. Jackson
Discovery site Johannesburg Obs.
Discovery date9 August 1936
Designations
(1397) Umtata
Named after
 Mthatha [2]
(South-African town)
1936 PG ·1931 GK
1945 QF ·1945 RC
1948 EB1
main-belt  ·(middle) [3]
background [4]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 81.14 yr (29,638 days)
Aphelion 3.3646 AU
Perihelion 1.9967 AU
2.6806 AU
Eccentricity 0.2551
4.39 yr (1,603 days)
173.37°
0° 13m 28.56s / day
Inclination 3.5109°
77.437°
206.53°
Physical characteristics
Dimensions20.35±0.30 km [5]
20.40 km (derived) [3]
20.798±0.292 km [6]
22.895±0.285 km [7]
30 h [8]
0.0794±0.0140 [7]
0.084±0.046 [6]
0.10 (assumed) [3]
0.112±0.004 [5]
S/C [3]
B–V = 0.690 [1]
U–B = 0.210 [1]
11.47 [1] [5]  ·11.57 [3] [7] [8]

    1397 Umtata, provisional designation 1936 PG, is an asteroid from the background population of the asteroid belt's central region, approximately 21 kilometers in diameter. It was discovered by South-African astronomer Cyril Jackson at the Union Observatory in Johannesburg on 9 August 1936. [9] The asteroid was named after the South-African town of Mthatha, formerly known as Umtata. [2]

    Contents

    Orbit and classification

    Umtata is a non-family asteroid of the main belt's background population. [4] It orbits the Sun in the central asteroid belt at a distance of 2.0–3.4  AU once every 4 years and 5 months (1,603 days). Its orbit has an eccentricity of 0.26 and an inclination of 4° with respect to the ecliptic. [1]

    The asteroid was first identified as 1931 GK at the Lowell Observatory in April 1931. The body's observation arc begins with its official discovery observation at Johannesburg. [9]

    Physical characteristics

    The asteroid's spectral type is unknown. The Lightcurve Data Base assumes an S- or C-type to be equally likely, using an average albedo of 0.10 (see below). [3] [lower-alpha 1]

    Rotation period

    In May 1984, a rotational lightcurve of Umtata was obtained from photometric observations by American astronomer Richard Binzel. Analysis of the fragmentary lightcurve gave a rotation period of 30 hours with a brightness amplitude of 0.13 magnitude ( U=1 ). [8] As of 2017, no secure period has been obtained. [3]

    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, Umtata measures between 20.35 and 22.895 kilometers in diameter and its surface has an albedo between 0.0794 and 0.112. [5] [6] [7]

    The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.10 – a compromise value between the stony (0.20) and carbonaceous asteroid's, both abundant in the main belt's central region – and derives a diameter of 20.40 kilometers based on an absolute magnitude of 11.57. [3]

    Naming

    This minor planet was named after South-African town of Mthatha, formerly known as Umtata. It is the capital town of the OR Tambo District Municipality and the King Sabata Dalindyebo Local Municipality. [2] The official naming citation was published by the Minor Planet Center in April 1953 ( M.P.C. 909). [10]

    Notes

    1. ↑ Asteroid Lightcurve Data Base (LCDB) – 2. Taxonomic Class, orbital class, and albedo. The LCDB generically assumes a S/C-type with an albedo of 0.10 for non-family main belt asteroids with a semi-major axis between 2.6 and 2.7.

    Related Research Articles

    <span class="mw-page-title-main">1743 Schmidt</span> Asteroid

    1743 Schmidt, provisional designation 4109 P-L, is a dark background asteroid from the inner regions of the asteroid belt, approximately 19 kilometers in diameter. It was discovered during the Palomar–Leiden survey on 24 September 1960, by astronomers Ingrid and Cornelis van Houten at Leiden, on photographic plates taken by Tom Gehrels at Palomar Observatory in California. The C-type asteroid has a rotation period of 17.5 hours. It was named for the optician Bernhard Schmidt.

    <span class="mw-page-title-main">1012 Sarema</span>

    1012 Sarema is a dark background asteroid from the inner regions of the asteroid belt, approximately 21 kilometers kilometers in diameter. It was discovered on 12 January 1924, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory at Heidelberg, Germany. The asteroid has a rotation period of 10.3 hours and probably an elongated shape. It was named after Sarema, a character in the poem The Fountain of Bakhchisaray by Aleksandr Pushkin, and the protagonist of the opera Sarema by Alexander von Zemlinsky based upon it.

    1018 Arnolda, provisional designation 1924 QM, is a stony asteroid from the central regions of the asteroid belt, approximately 16 kilometers in diameter. It was discovered on 3 March 1924, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany. The asteroid was named after physicist Arnold Berliner.

    1024 Hale, provisional designation A923 YO13, is a carbonaceous background asteroid from the outer regions of the asteroid belt, approximately 45 kilometers (28 miles) in diameter. The asteroid was discovered on 2 December 1923, by Belgian–American astronomer George Van Biesbroeck at the Yerkes Observatory in Wisconsin, United States. It was named for American astronomer George Ellery Hale. The dark C-type asteroid may have a rotation period of 16 hours.

    <span class="mw-page-title-main">1116 Catriona</span>

    1116 Catriona is a carbonaceous asteroid from the outer regions of the asteroid belt, approximately 39 kilometers in diameter. It was discovered on 5 April 1929, by South African astronomer Cyril Jackson at the Union Observatory in Johannesburg. The asteroid was probably named after the 1893-novel Catriona by Robert Louis Stevenson.

    1059 Mussorgskia, provisional designation 1925 OA, is a background asteroid from the central regions of the asteroid belt, approximately 25 kilometers in diameter. It was discovered on 19 July 1925, by Soviet astronomer Vladimir Albitsky at the Simeiz Observatory on the Crimean peninsula. The asteroid was named for Russian composer Modest Mussorgsky. The X- or C-type asteroid has a rotation period of 5.636 hours.

    1068 Nofretete, provisional designation 1926 RK, is a stony asteroid from the background population in the outer asteroid belt, approximately 23 kilometers in diameter. It was discovered on 13 September 1926, by Belgian astronomer Eugène Delporte at the Royal Observatory of Belgium in Uccle. The asteroid was named after the Ancient Egyptian Queen Nefertiti by its German name "Nofretete". The near-Earth asteroid 3199 Nefertiti is also named after her.

    1076 Viola, provisional designation 1926 TE, is a Nysian asteroid from the inner regions of the asteroid belt, approximately 22 kilometers in diameter. It was discovered on 5 October 1926, by German astronomer Karl Reinmuth at the Heidelberg Observatory in southwest Germany. The asteroid was named after the flowering plant Viola.

    <span class="mw-page-title-main">1137 Raïssa</span>

    1137 Raïssa is a stony background asteroid and slow rotator, approximately 22 kilometers in diameter, located in the inner regions of the asteroid belt. It was discovered by Grigory Neujmin at Simeiz Observatory in 1929, and named in memory of Raïssa Maseeva, who worked at the Pulkovo Observatory.

    <span class="mw-page-title-main">1147 Stavropolis</span>

    1147 Stavropolis is a stony background asteroid from the inner regions of the asteroid belt. It was discovered on 11 June 1929, by Georgian–Russian astronomer Grigory Neujmin at the Simeiz Observatory on the Crimean peninsula. The S-type asteroid has a rotation period of 5.7 hours and measures approximately 14 kilometers in diameter. It was named after the Russian city of Stavropol.

    1149 Volga, provisional designation 1929 PF, is a dark background asteroid from the outer regions of the asteroid belt, approximately 55 kilometers in diameter. It was discovered on 1 August 1929, by Soviet astronomer Evgenij Skvorcov at the Simeiz Observatory on the Crimean peninsula. The asteroid was named after the Volga River.

    2873 Binzel, provisional designation 1982 FR, is a stony Florian asteroid and binary system from the inner regions of the asteroid belt, approximately 6.5 kilometers in diameter. It was discovered on 28 March 1982, by American astronomer Edward Bowell at the Anderson Mesa Station in Flagstaff, Arizona. The asteroid was named after astronomer Richard Binzel. Its 1.6-kilometer minor-planet moon was discovered in 2019.

    1780 Kippes, provisional designation A906 RA, is an Eoan asteroid from the outer regions of the asteroid belt, approximately 28 kilometers in diameter. It was discovered on 12 September 1906, by astronomer August Kopff at the Heidelberg-Königstuhl State Observatory in southwest Germany. The asteroid was named after German Catholic priest and amateur astronomer Otto Kippes.

    1504 Lappeenranta, provisional designation 1939 FM, is a stony background asteroid from the inner regions of the asteroid belt, approximately 12 kilometers in diameter. It was discovered on 23 March 1939, by Finnish astronomer Liisi Oterma at the Iso-Heikkilä Observatory, and named after the city of Lappeenranta in Finland.

    <span class="mw-page-title-main">1368 Numidia</span> Asteroid

    1368 Numidia, provisional designation 1935 HD, is a stony background asteroid from the central regions of the asteroid belt, approximately 19 kilometers in diameter. It was discovered on 30 April 1935, by South African astronomer Cyril Jackson at the Union Observatory in Johannesburg. The asteroid was named after the ancient North African kingdom of Numidia.

    <span class="mw-page-title-main">1197 Rhodesia</span> Asteroid

    1197 Rhodesia, provisional designation 1931 LD, is a dark background asteroid from the outer regions of the asteroid belt, approximately 48 kilometers in diameter. It was discovered on 9 June 1931, by South African astronomer Cyril Jackson at the Union Observatory in Johannesburg. The likely C-type asteroid has a rotation period of 16.1 hours. It was named for Rhodesia, a former British colony and unrecognised state, which is now Zimbabwe.

    1628 Strobel, provisional designation 1923 OG, is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 55 kilometers in diameter.

    1585 Union, provisional designation 1947 RG, is a dark background asteroid from the outer regions of the asteroid belt, approximately 52 kilometers in diameter. It was discovered on 7 September 1947, by South African astronomer Ernest Johnson at the Union Observatory in Johannesburg, South Africa. The asteroid was named after the discovering observatory.

    <span class="mw-page-title-main">1336 Zeelandia</span>

    1336 Zeelandia, provisional designation 1934 RW, is a stony Koronian asteroid from the outer regions of the asteroid belt, approximately 21 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 for the Dutch province of Zeeland.

    <span class="mw-page-title-main">1289 Kutaïssi</span>

    1289 Kutaïssi is a stony Koronian asteroid from the outer region of the asteroid belt. Discovered by Grigory Neujmin at Simeiz Observatory in 1933, it was later named after the Georgian city of Kutaisi. The S-type asteroid has a rotation period of 3.6 hours and measures approximately 22 kilometers in diameter.

    References

    1. 1 2 3 4 5 6 "JPL Small-Body Database Browser: 1397 Umtata (1936 PG)" (2017-10-01 last obs.). Jet Propulsion Laboratory . Retrieved 17 October 2017.
    2. 1 2 3 Schmadel, Lutz D. (2007). "(1397) Umtata". Dictionary of Minor Planet Names – (1397) Umtata. Springer Berlin Heidelberg. p. 113. doi:10.1007/978-3-540-29925-7_1398. ISBN   978-3-540-00238-3.
    3. 1 2 3 4 5 6 7 8 "LCDB Data for (1397) Umtata". Asteroid Lightcurve Database (LCDB). Retrieved 17 October 2017.
    4. 1 2 "Asteroid 1397 Umtata – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 29 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 Masiero, 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 . Retrieved 17 October 2017.
    7. 1 2 3 4 Mainzer, 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.
    8. 1 2 3 Binzel, R. P. (October 1987). "A photoelectric survey of 130 asteroids". Icarus. 72 (1): 135–208. Bibcode:1987Icar...72..135B. doi:10.1016/0019-1035(87)90125-4. ISSN   0019-1035 . Retrieved 17 October 2017.
    9. 1 2 "1397 Umtata (1936 PG)". Minor Planet Center. Retrieved 17 October 2017.
    10. ↑ 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.
    This page is based on this Wikipedia article
    Text is available under the CC BY-SA 4.0 license; additional terms may apply.
    Images, videos and audio are available under their respective licenses.