1235 Schorria

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1235 Schorria
Discovery [1]
Discovered by K. Reinmuth
Discovery site Heidelberg Obs.
Discovery date18 October 1931
Designations
(1235) Schorria
Pronunciation /ˈʃɒriə/
Named after
 Richard Schorr [2]
(1867–1951)
(German astronomer)
1931 UJ ·1988 HD
Mars-crosser [3]  · Hungaria [1] [4]
Orbital characteristics [3]
Epoch 31 May 2020 (JD 2459000.5)
Uncertainty parameter 0
Observation arc 88.52 yr (32,333 d)
Aphelion 2.2056 AU
Perihelion 1.6147 AU
1.9102 AU
Eccentricity 0.1547
2.64 yr (964 d)
183.19°
0° 22m 23.88s / day
Inclination 24.998°
12.947°
43.732°
Earth  MOID 0.6612 AU (257.6 LD)
Physical characteristics
Mean diameter
5.55±1.11  km [5]
9 km (estimate) [6]
11±4(generic) [7]
1265±25  h [6] [lower-alpha 1]
0.40 (assumed) [4]
0.486±0.194 [5]
12.68 [3] [5]
13.10 [1] [4] [8] [9]

    1235 Schorria ( prov. designation:1931 UJ), is a Hungaria asteroid, sizable Mars-crosser, and exceptionally slow rotator from the inner region of the asteroid belt. The carbonaceous C-type asteroid has an outstandingly long rotation period of 1265 hours (7.5 weeks) and measures approximately 5.5 kilometers (3.4 miles) kilometers in diameter. It was discovered by Karl Reinmuth at Heidelberg Observatory in southwest Germany on 18 October 1931, [1] and named after German astronomer Richard Schorr (1867–1951). [2]

    Contents

    Orbit and classification

    Schorria is a Mars-crossing member of the Hungaria asteroids, which form the innermost dense concentration of asteroids in the Solar System. It orbits the Sun in the inner main-belt at a distance of 1.6–2.2  AU once every 2 years and 8 months (964 days; semi-major axis of 1.91 AU). Its orbit has an eccentricity of 0.15 and an inclination of 25° with respect to the ecliptic. [3] The body's observation arc begins at Heidelberg two weeks after its official discovery observation, as no precoveries were taken, and no prior identifications were made. [1]

    Naming

    This minor planet was named after Richard Schorr (1867–1951), a German astronomer at Bergedorf Observatory, Hamburg, who discovered the minor planets 869 Mellena and 1240 Centenaria. After being named by ARI with the consent of the discoverer (RI 862), naming citation was later published by Paul Herget in The Names of the Minor Planets in 1955 ( H 114 ). [2] The lunar crater Schorr is also named in the astronomer's honour. [2] In 1913, asteroid 725 Amanda was already named after Schorr's wife by discovering astronomer Johann Palisa. [10]

    Physical characteristics

    In the Tholen taxonomy, Schorria' spectral type is closest to that of a carbonaceous C-type and somewhat similar to that of an X-type asteroid though with a noisy spectrum (CX:). [3]

    Slow rotator

    In March 2009, a rotational lightcurve [lower-alpha 1] of Schorria was obtained from photometric observations by American astronomers Brian Warner and Robert Stephens. Light curve analysis of the two astronomer's combined data set of almost 2000 photometric observations revealed that this Mars-crosser is one of the slowest rotating asteroids known to exist. It has a rotation period of 1265±80 hours, or about 52 days, with a high brightness variation of 1.40 in magnitude ( U=3 ), [6] which is indicative of a non-spheroidal shape. The body was also suspected to be in a tumbling state. However, no significant evidence of such a non-principal axis rotation could be found. [6]

    Diameter and albedo

    According to the space-based survey by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Schorria measures (5.55±1.11) kilometers in diameter and its surface has an albedo of (0.486±0.194). [5] Based on a generic magnitude-to-diameter conversion, the body measures between 7 and 15 kilometers, for an absolute magnitude at 13 and an albedo in the range of 0.05 to 0.25, [7] while Warner/Stephens estimated a diameter of approximately 9 kilometers in 2009. [6] : 103 

    The Collaborative Asteroid Lightcurve Link calculates a diameter of 5.04 kilometers based on an albedo of 0.40, which is contrary to an expected low albedo for dark, carbonaceous CX-type asteroids as classified by Tholen, [4] but typical for the descendants of the E-belt, a hypothesized population of primordial asteroids, which the E-type Hungarian asteroids with high inclinations and a semi-major axis of 1.9 AU are thought to have originated from. [4]

    Notes

    1. 1 2 Lightcurve plot of (1235) Schorria, Palmer Divide Observatory, B. D. Warner (2009)

    Related Research Articles

    869 Mellena is a dark background asteroid from the central region of the asteroid belt. It was discovered on 9 May 1917, by astronomer Richard Schorr at the Bergedorf Observatory in Hamburg. The carbonaceous C-type asteroid has a shorter than average rotation period of 6.5 hours and measures approximately 19 kilometers in diameter. It was named after Werner von Melle (1853–1937), mayor of Hamburg, who founded the discovering observatory.

    2099 Öpik, provisional designation 1977 VB, is a dark and eccentric asteroid and Mars-crosser from the inner regions of the asteroid belt, approximately 5.1 kilometers in diameter.

    Laodamia, provisional designation 1924 PK, is a stony asteroid and sizable Mars-crosser near the innermost regions of the asteroid belt, approximately 7.5 kilometers in diameter. It was discovered on 5 January 1924, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany. The asteroid was named after Laodamia from Greek mythology.

    1131 Porzia, provisional designation 1929 RO, is a stony asteroid and sizable Mars-crosser from the innermost regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered on 10 September 1929, by German astronomer Karl Reinmuth at the Heidelberg Observatory in southwest Germany. The asteroid was named after Porcia wife of Brutus, who assassinated Julius Caesar.

    1139 Atami, provisional designation 1929 XE, is a stony asteroid and sizable Mars-crosser, as well as a synchronous binary system near the innermost region of the asteroid belt, approximately 9 kilometers in diameter. It was discovered on 1 December 1929, by Japanese astronomers Okuro Oikawa and Kazuo Kubokawa at the Tokyo Astronomical Observatory near Tokyo. It was named after the Japanese city of Atami. It has the lowest Minimum orbit intersection distance (MOID) to Mars of any asteroid as large as it, its orbit intersecting only 0.03 astronomical units from the planet.

    3581 Alvarez, provisional designation 1985 HC, is a carbonaceous asteroid and a very large Mars-crosser on an eccentric orbit from the asteroid belt, approximately 13.7 kilometers in diameter. It was discovered on 23 April 1985, by American astronomer couple Carolyn and Eugene Shoemaker at the Palomar Observatory in California. The likely spherical B-type asteroid has a rotation period of 33.4 hours. It was named for scientists Luis Alvarez and his son Walter Alvarez.

    1474 Beira, provisional designation 1935 QY, is a bright carbonaceous asteroid and large Mars-crosser on an eccentric orbit from the asteroid belt, approximately 15 kilometers in diameter. It was discovered on 20 August 1935, by South African astronomer Cyril Jackson at the Union Observatory in Johannesburg. The asteroid was named after the port city of Beira in Mozambique.

    1543 Bourgeois, provisional designation 1941 SJ, is a stony asteroid from the central asteroid belt's background population, approximately 12 kilometers in diameter. It was discovered on 21 September 1941, by astronomer Eugène Delporte at the Royal Observatory of Belgium in Uccle. The asteroid was named after Belgian astronomer Paul Bourgeois.

    1919 Clemence, provisional designation 1971 SA, is a bright Hungaria asteroid and suspected tumbler from the inner regions of the asteroid belt, approximately 4 kilometers in diameter. It was discovered on 16 September 1971, by American astronomer James Gibson together with Argentine astronomer Carlos Cesco at the Yale-Columbia Southern Station at Leoncito Astronomical Complex in Argentina. It is named after astronomer Gerald Clemence.

    6141 Durda, provisional designation 1992 YC3 is a stony Hungaria asteroid, classified as slow rotator and Mars-crosser from the innermost region of the asteroid belt, approximately 3.2 kilometers in diameter. It was discovered on 26 December 1992, by Spacewatch at Kitt Peak National Observatory in Arizona, United States.

    1227 Geranium, provisional designation 1931 TD, is a carbonaceous background asteroid from the outer regions of the asteroid belt, approximately 46 kilometers in diameter. It was discovered on 5 October 1931, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory. The asteroid was named for the flowering plant Geranium (cranesbills).

    1316 Kasan, provisional designation 1933 WC, is a stony asteroid and sizable Mars-crosser on an eccentric orbit from the asteroid belt, approximately 7 kilometers in diameter. It was discovered on 17 November 1933, by Soviet astronomer Grigory Neujmin at the Simeiz Observatory on the Crimean peninsula. The asteroid was named for the city of Kazan, Russia, and its nearby Engelhardt Observatory.

    <span class="mw-page-title-main">1508 Kemi</span>

    1508 Kemi, provisional designation 1938 UP, is an eccentric, carbonaceous asteroid and one of the largest Mars-crossers, approximately 17 kilometers in diameter. Discovered by Heikki Alikoski at Turku Observatory in 1938, the asteroid was later named after the Finnish town of Kemi and the Kemi River.

    3635 Kreutz, provisional designation 1981 WO1, is a slowly rotating Hungaria asteroid and Mars-crosser from the innermost regions of the asteroid belt, approximately 3 kilometers in diameter. It was discovered on 21 November 1981, by Czech astronomer Luboš Kohoutek at the Calar Alto Observatory in southern Spain.

    3343 Nedzel, provisional designation 1982 HS, is an asteroid and sizable Mars-crosser on an eccentric orbit from the inner regions of the asteroid belt, approximately 6.5 kilometers in diameter. It was discovered on 28 April 1982, by astronomer Laurence Taff at the Lincoln Laboratory's Experimental Test Site in Socorro, New Mexico, in the United States. The asteroid was named in memory of Alexander Nedzel, a manager at MIT Lincoln Laboratory.

    <span class="mw-page-title-main">1204 Renzia</span> Asteroid

    1204 Renzia, provisional designation 1931 TE, is a stony asteroid and sizable Mars-crosser on an eccentric orbit from the inner regions of the asteroid belt, approximately 10 kilometers in diameter. It was discovered by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany on 6 October 1931. The asteroid was named after German-Russian astronomer Franz Renz.

    5426 Sharp, provisional designation 1985 DD, is a bright Hungaria asteroid and suspected binary system from the inner regions of the asteroid belt, approximately 2–3 kilometers in diameter. It was discovered on 16 February 1985, by American astronomer Carolyn Shoemaker at Palomar Observatory, California, and named after American geologist Robert P. Sharp.

    1468 Zomba, provisional designation 1938 PA, is a stony asteroid and large Mars-crosser near the innermost regions of the asteroid belt, approximately 7 kilometers in diameter. Discovered by Cyril Jackson at Johannesburg Observatory in 1938, the asteroid was named after the city of Zomba in the Republic of Malawi.

    4142 Dersu-Uzala, provisional designation 1981 KE, is a Hungaria asteroid, sizable Mars-crosser and potentially slow rotator from the innermost region of the asteroid belt, approximately 6 kilometers in diameter. It was discovered by Czech astronomer Zdeňka Vávrová at Kleť Observatory on 28 May 1981. The rare A-type asteroid has a rotation period of 140 hours. It was named after the Siberian trapper and hunter Dersu Uzala.

    <span class="mw-page-title-main">1310 Villigera</span>

    1310 Villigera, provisional designation 1932 DB, is a stony asteroid and large Mars-crosser from the innermost regions of the asteroid belt, approximately 14 kilometers in diameter. It was discovered on 28 February 1932, by German astronomer Friedrich Schwassmann at Bergedorf Observatory in Hamburg, Germany. The asteroid was named after astronomer Walther Villiger.

    References

    1. 1 2 3 4 5 "1235 Schorria (1931 UJ)". Minor Planet Center. Retrieved 25 January 2017.
    2. 1 2 3 4 Schmadel, Lutz D. (2007). "(1235) Schorria". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 103. doi:10.1007/978-3-540-29925-7_1236. ISBN   978-3-540-00238-3.
    3. 1 2 3 4 5 "JPL Small-Body Database Browser: 1235 Schorria (1931 UJ)" (2017-07-01 last obs.). Jet Propulsion Laboratory . Retrieved 26 July 2017.
    4. 1 2 3 4 5 "LCDB Data for (1235) Schorria". Asteroid Lightcurve Database (LCDB). Retrieved 25 January 2017.
    5. 1 2 3 4 Alí-Lagoa, V.; Delbo', M. (July 2017). "Sizes and albedos of Mars-crossing asteroids from WISE/NEOWISE data" (PDF). Astronomy and Astrophysics. 603: 8. arXiv: 1705.10263 . Bibcode:2017A&A...603A..55A. doi:10.1051/0004-6361/201629917 . Retrieved 20 October 2017.
    6. 1 2 3 4 5 Warner, Brian D.; Stephens, Robert D. (July 2009). "The Lightcurve for the Long-Period Hungaria Asteroid 1235 Schorria". The Minor Planet Bulletin. 36 (3): 102–103. Bibcode:2009MPBu...36..102W. ISSN   1052-8091 . Retrieved 25 January 2017.
    7. 1 2 "Asteroid Size Estimator". CNEOS NASA/JPL. Retrieved 15 June 2020.
    8. ↑ Wisniewski, W. Z.; Michalowski, T. M.; Harris, A. W.; McMillan, R. S. (March 1995). "Photoelectric Observations of 125 Asteroids". Abstracts of the Lunar and Planetary Science Conference. 26: 1511. Bibcode:1995LPI....26.1511W . Retrieved 25 January 2017.
    9. ↑ Pravec, Petr; Harris, Alan W.; Kusnirák, Peter; Galád, Adrián; Hornoch, Kamil (September 2012). "Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations". Icarus. 221 (1): 365–387. Bibcode:2012Icar..221..365P. doi:10.1016/j.icarus.2012.07.026 . Retrieved 25 January 2017.
    10. ↑ Schmadel, Lutz D. (2007). "(725) Amanda". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 70. doi:10.1007/978-3-540-29925-7_726. ISBN   978-3-540-00238-3.
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