1335 Demoulina

Last updated

1335 Demoulina
001335-asteroid shape model (1335) Demoulina.png
Shape model of Demoulina from its lightcurve
Discovery [1]
Discovered by K. Reinmuth
Discovery site Heidelberg Obs.
Discovery date7 September 1934
Designations
(1335) Demoulina
Named after
Prof. Demoulin [2]
(Belgian astronomer)
1934 RE ·1954 RA
main-belt  ·(inner)
Flora [3]  · background [4]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 82.66 yr (30,191 days)
Aphelion 2.5854 AU
Perihelion 1.8955 AU
2.2404 AU
Eccentricity 0.1540
3.35 yr (1,225 days)
255.64°
0° 17m 38.04s / day
Inclination 2.5472°
172.62°
198.89°
Physical characteristics
Dimensions6.35±1.43 km [5]
7.47 km (calculated) [3]
7.484±0.130 km [6]
7.684±0.133 km [7]
2.59±0.05 h (poor) [8]
74.86±0.10 h [9]
0.2073±0.0275 [7]
0.218±0.043 [6]
0.24 (assumed) [3]
0.26±0.14 [5]
S (assumed) [3]
12.8 [3]  ·12.9 [1] [7]  ·13.06 [5]  ·13.89±0.74 [10]

    1335 Demoulina, provisional designation 1934 RE, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. Discovered by Karl Reinmuth at Heidelberg Observatory in 1934, the asteroid was named after Prof. Demoulin, a Belgian astronomer at Ghent University. It has a slower-than average spin rate of nearly 75 hours.

    Contents

    Discovery

    Demoulina was discovered on 7 September 1934, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany. [11] Six nights later, it was independently discovered by Belgian astronomer Eugène Delporte at Uccle Observatory on 13 September 1934. [2] The Minor Planet Center only recognizes the first discoverer. [11]

    Orbit and classification

    Demoulina is a member of the Flora family ( 402 ), a giant asteroid family and the largest family of stony asteroids in the asteroid belt. [3] However, it is a non-family asteroid of the main belt's background population when applying the Hierarchical Clustering Method to its proper orbital elements. [4]

    It orbits the Sun in the inner asteroid belt at a distance of 1.9–2.6  AU once every 3 years and 4 months (1,225 days; semi-major axis of 2.24 AU). Its orbit has an eccentricity of 0.15 and an inclination of 3° with respect to the ecliptic. [1] The body's observation arc begins with its official discovery observation at Heidelberg in 1934. [11]

    Physical characteristics

    Demoulina is an assumed S-type asteroid. [3]

    Rotation period

    In February 2006, a rotational lightcurve of Demoulina was obtained from photometric observations by American astronomers Lawrence Molnar and Melissa Haegert at the Calvin–Rehoboth Observatory in New Mexico. Lightcurve analysis gave a rotation period of 74.86 hours with a brightness amplitude of 0.78 magnitude ( U=2+ ). [9] While not being a slow rotator, Demoulina's period is significantly longer than that for most asteroids. Its high brightness amplitude also indicates that it has an irregular or elongated shape.

    Other photometric lightcurves which are based on a single night of observation are rated poorly ( U=1 ). [8]

    Diameter and albedo

    According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Demoulina measures between 6.35 and 7.684 kilometers in diameter and its surface has an albedo between 0.2073 and 0.26. [5] [6] [7]

    The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – derived from 8 Flora, the parent body of the Flora family, and calculates a diameter of 7.47 kilometers based on an absolute magnitude of 12.8. [3]

    Naming

    This minor planet was named after Prof. Demoulin, a Belgian astronomer at Ghent University. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 ( H 121 ). [2]

    Related Research Articles

    <span class="mw-page-title-main">1118 Hanskya</span> Asteroid

    1118 Hanskya is a large background asteroid, approximately 77 kilometers in diameter, located in the outer regions of the asteroid belt. Discovered by Sergey Belyavsky and Nikolaj Ivanov in 1927, it was named after Russian astronomer Aleksey Hansky. The presumed dark C-type asteroid has a rotation period of 15.6 hours.

    1151 Ithaka, provisional designation 1929 RK, is a carbonaceous asteroid from the inner regions of the asteroid belt, approximately 14 kilometers in diameter. It was discovered by Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in 1929, and later named for the Greek island of Ithaca.

    2751 Campbell, provisional designation 1962 RP, is a stony Nysian asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter.

    6398 Timhunter, provisional designation 1991 CD1, is a stony Phocaea asteroid from the inner regions of the asteroid belt, approximately 5.5 kilometers in diameter. It was discovered on 10 February 1991, by American astronomer couple Carolyn and Eugene Shoemaker, in collaboration with Canadian astronomer David H. Levy at Palomar Observatory in California, United States. It was named for American amateur astronomer Tim Hunter.

    <span class="mw-page-title-main">1457 Ankara</span> Stony asteroid from the central region of the asteroid belt

    1457 Ankara, provisional designation 1937 PA, is a stony asteroid from the central region of the asteroid belt, approximately 18 kilometers in diameter. It was discovered on 3 August 1937, by German astronomer Karl Reinmuth at Heidelberg Observatory in southwest Germany, and later named for the Turkish capital city of Ankara.

    2033 Basilea, provisional designation 1973 CA, is a stony asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter. It was discovered on 6 February 1973, by astronomer Paul Wild at the Zimmerwald Observatory near Bern, Switzerland. The asteroid was named for the Swiss city of Basel.

    24101 Cassini (provisional designation 1999 VA9) is an eccentric background asteroid from the middle region of the asteroid belt, approximately 7 kilometers in diameter. It was discovered on 9 November 1999, by American amateur astronomer Charles Juels at the Fountain Hills Observatory (678) in Arizona, United States. It was named after Italian–French astronomer Giovanni Cassini.

    1295 Deflotte, provisional designation 1933 WD, is a carbonaceous asteroid from the outer regions of the asteroid belt, approximately 48 kilometers in diameter. It was discovered on 25 November 1933, by French astronomer Louis Boyer at the Algiers Observatory in Algeria, North Africa. The asteroid was named after the discoverer's nephew.

    1267 Geertruida, provisional designation 1930 HD, is a carbonaceous background asteroid from the inner regions of the asteroid belt, approximately 20 kilometers in diameter. Discovered by astronomer Hendrik van Gent at Johannesburg Observatory in 1930, the asteroid was later named after Geertruid Pels, sister of Dutch astronomer Gerrit Pels.

    3099 Hergenrother, provisional designation 1940 GF, is an asteroid from the outer region of the asteroid belt, approximately 15 kilometers in diameter. It was discovered on 3 April 1940, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland, and named after American astronomer Carl Hergenrother in 1996.

    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.

    1739 Meyermann, provisional designation 1939 PF, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 7.5 kilometers in diameter. It was discovered by German astronomer Karl Reinmuth at Heidelberg Observatory on 15 August 1939. It was later named in memory of astronomer Bruno Meyermann.

    1455 Mitchella, provisional designation 1937 LF, is a Florian asteroid, slow rotator and suspected tumbler from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered on 5 June 1937, by astronomer Alfred Bohrmann at the Heidelberg-Königstuhl State Observatory in southwest Germany. The asteroid was named after American astronomer Maria Mitchell.

    2056 Nancy, provisional designation A909 TB, is a stony background asteroid from the inner regions of the asteroid belt, approximately 10 kilometers in diameter. It was discovered on 15 October 1909, by German astronomer Joseph Helffrich at Heidelberg Observatory in southwest Germany. The S-type asteroid has a tentative rotation period of 15.0 hours. It was named for Nancy Marsden, wife of British astronomer Brian G. Marsden.

    1990 Pilcher, provisional designation 1956 EE, is a stony background asteroid from the Florian region of the inner asteroid belt, approximately 7 kilometers in diameter. It was discovered on 9 March 1956, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in Heidelberg, Germany. In 1982, it was named by the MPC for American physicist and photometrist Frederick Pilcher. The S-type asteroid has a short rotation period of 2.8 hours.

    <span class="mw-page-title-main">1648 Shajna</span> Stony asteroid from the inner regions of the asteroid belt

    1648 Shajna, provisional designation 1935 RF, is a stony asteroid from the inner regions of the asteroid belt, approximately 9 kilometers in diameter. It was discovered on 5 September 1935, by Russian astronomer Pelageya Shajn at Simeiz Observatory on the Crimean peninsula. Two weeks later, it was independently discovered by Cyril Jackson at Johannesburg Observatory, South Africa. It was later named after the discoverer and her husband, Russian astronomers Grigory Shajn.

    2391 Tomita, provisional designation 1957 AA, is a Nysian asteroid from the inner regions of the asteroid belt, approximately 15 kilometers in diameter. The asteroid was discovered on 9 January 1957, by German astronomer Karl Reinmuth at Heidelberg Observatory in southern Germany. It was named after Japanese astronomer Kōichirō Tomita.

    3823 Yorii, provisional designation 1988 EC1, is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 11 kilometers in diameter.

    1257 Móra, provisional designation 1932 PE, is an asteroid from the inner regions of the asteroid belt, approximately 15 kilometers in diameter. It was discovered on 8 August 1932, by German astronomer Karl Reinmuth at Heidelberg Observatory in southwest Germany. The asteroid was named after Hungarian astronomer Károly Móra.

    <span class="mw-page-title-main">1632 Sieböhme</span> Asteroid and relatively slow rotator

    1632 Sieböhme, provisional designation 1941 DF, is an asteroid and relatively slow rotator from the middle region of the asteroid belt, approximately 27 kilometers in diameter. It was discovered on 26 February 1941, by German astronomer Karl Reinmuth at Heidelberg Observatory in southern Germany. It was later named after ARI-astronomer Siegfried Böhme.

    References

    1. 1 2 3 4 "JPL Small-Body Database Browser: 1335 Demoulina (1934 RE)" (2017-05-05 last obs.). Jet Propulsion Laboratory . Retrieved 29 November 2017.
    2. 1 2 3 Schmadel, Lutz D. (2007). "(1335) Demoulina". Dictionary of Minor Planet Names – (1335) Demoulina. Springer Berlin Heidelberg. p. 109. doi:10.1007/978-3-540-29925-7_1336. ISBN   978-3-540-00238-3.
    3. 1 2 3 4 5 6 7 8 "LCDB Data for (1335) Demoulina". Asteroid Lightcurve Database (LCDB). Retrieved 29 November 2017.
    4. 1 2 "Asteroid 1335 Demoulina – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 29 October 2019.
    5. 1 2 3 4 Nugent, C. R.; Mainzer, A.; Bauer, J.; Cutri, R. M.; Kramer, E. A.; Grav, T.; et al. (September 2016). "NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos". The Astronomical Journal. 152 (3): 12. arXiv: 1606.08923 . Bibcode:2016AJ....152...63N. doi: 10.3847/0004-6256/152/3/63 .
    6. 1 2 3 Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J.; et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal. 741 (2): 20. arXiv: 1109.4096 . Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68. S2CID   118745497 . Retrieved 29 November 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. S2CID   35447010.
    8. 1 2 Behrend, Raoul. "Asteroids and comets rotation curves – (1335) Demoulina". Geneva Observatory. Retrieved 29 November 2017.
    9. 1 2 Molnar, Lawrence A.; Haegert, Melissa J. (December 2007). "Lightcurve Analysis of Five Main-belt Asteroids at the Calvin-Rehoboth Observatory". The Minor Planet Bulletin. 34 (4): 126–128. Bibcode:2007MPBu...34..126M. ISSN   1052-8091 . Retrieved 29 November 2017.
    10. ↑ 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. S2CID   53493339 . Retrieved 29 November 2017.
    11. 1 2 3 "1335 Demoulina (1934 RE)". Minor Planet Center. Retrieved 29 November 2017.
    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.