1338 Duponta

Last updated

1338 Duponta
1338Dup2-LB1-mag16.jpg
Duponta seen at approx. 16 apmag in 2009
Discovery [1]
Discovered by L. Boyer
Discovery site Algiers Obs.
Discovery date4 December 1934
Designations
(1338) Duponta
Pronunciation djˈpɒntə
Named after
Marc Dupont
(discoverer's nephew) [2]
1934 XA
main-belt  ·(inner)
Flora [3] [4]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 82.42 yr (30,104 days)
Aphelion 2.5179 AU
Perihelion 2.0108 AU
2.2644 AU
Eccentricity 0.1120
3.41 yr (1,245 days)
102.88°
0° 17m 21.48s / day
Inclination 4.8170°
325.63°
110.63°
Known satellites 1 (P: 17.57; D: 1.77 km) [3] [5] [6]
Physical characteristics
Dimensions7.470±0.114 km [7]
7.68±0.06(derived) [6]
7.875±0.062 km [8]
7.88 km (taken) [3]
7.885 km [9]
3.85449±0.0003 h [10] [lower-alpha 1]
3.85453±0.00009 h [5]
3.85453±0.0003 h [10] [lower-alpha 2]
0.2159 [3] [9]
0.2286±0.0274 [8]
0.251±0.040 [7]
S (assumed) [3]
12.30±0.03(R) [10]  ·12.39±0.2(R) [10]  ·12.6 [6]  ·12.7 [1]  ·12.75 [8]  ·12.798±0.064 [3] [9]

    1338 Duponta, provisional designation 1934 XA, is a stony Florian asteroid and synchronous binary system from the inner regions of the asteroid belt, approximately 7.8 kilometers in diameter.

    Contents

    It was discovered on 4 December 1934, by French astronomer Louis Boyer at the Algiers Observatory in Algeria, North Africa. [11] It was named after the discoverer's nephew, Marc Dupont. [2] The asteroid's unnamed minor-planet moon was discovered in March 2007. It measures approximately 1.77 kilometers in diameter and has an orbital period of 17.57 hours. [5]

    Orbit and classification

    Duponta is a member of the Flora family ( 402 ), [3] [4] a giant asteroid family and the largest family of stony asteroids in the main belt. [12] :23 It orbits the Sun in the inner main belt at a distance of 2.0–2.5  AU once every 3 years and 5 months (1,245 days). Its orbit has an eccentricity of 0.11 and an inclination of 5° with respect to the ecliptic. [1] The body's observation arc begins with its official discovery observation at Algiers in 1934. [11]

    Physical characteristics

    Duponta is an assumed stony S-type asteroid, which agrees with the Flora family's overall spectral type. [3] [12] :23

    Rotation period

    In March 2007, a rotational lightcurve of Duponta was obtained from photometric observations by a collaboration of Czech (Ondřejov Observatory), Slovak (Modra Observatory), Australian and American astronomers. Lightcurve analysis gave a well-defined rotation period of 3.85453 hours with a brightness variation of 0.23 magnitude ( U=3 ). [5] Follow-up observations by Petr Pravec in 2007 and 2010, gave a concurring period of 3.85449 and 3.85453 hours with an amplitude of 0.26 and 0.23 magnitude, respectively ( U=3/3 ). [10] [lower-alpha 1] [lower-alpha 2]

    Moon

    During the photometric observations in 2007, it was also revealed that Duponta is a synchronous binary asteroid with a minor-planet moon orbiting it every 17.57(8) hours. Based on mutual eclipse and occultation events with a magnitude between 0.06 and 0.12, the binary system has a mean-diameter ratio of 0.23±0.02, which translates into a diameter of 1.77 kilometers for the satellite. The minor planet moon has received the provisional designation S/2007 (1338) 1. It has an estimated semi-major axis of 14 kilometers. [3] [5] [6]

    Diameter and albedo

    According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Duponta measures 7.470 and 7.875 kilometers in diameter and its surface has an albedo of 0.2286 and 0.251, respectively. [7] [8]

    The Collaborative Asteroid Lightcurve Link adopts Petr Pravec's revised WISE data, that is, an albedo of 0.2159 and a diameter of 7.885 kilometers based on an absolute magnitude of 12.798. [3] [9]

    Naming

    This minor planet was named by the discoverer after his nephew Marc Dupont. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 ( H 122 ). [2]

    Notes

    1. 1 2 Pravec (2010) lightcurve plots – short and long period for (1338) Duponta, from online data published by the Ondrejov Asteroid Photometry Project. Summary figures at the LCDB
    2. 1 2 Pravec (2007) lightcurve plots – short and long period for (1338) Duponta, from online data published by the Ondrejov Asteroid Photometry Project. Summary figures at the LCDB

    Related Research Articles

    9617 Grahamchapman, provisional designation 1993 FA5, is a binary Florian asteroid from the inner regions of the asteroid belt, approximately 2.8 kilometers in diameter.

    1065 Amundsenia, provisional designation 1926 PD, is a stony asteroid and sizeable Mars-crosser on an eccentric orbit from the inner asteroid belt, approximately 10 kilometers in diameter. It was discovered on 4 August 1926, by Soviet astronomer Sergey Belyavsky at the Simeiz Observatory on the Crimean peninsula. The asteroid was named after Norwegian polar explorer Roald Amundsen.

    3673 Levy, provisional designation 1985 QS, is a binary Flora asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter. It was discovered on 22 August 1985, by American astronomer Edward Bowell at Lowell's Anderson Mesa Station near Flagstaff, Arizona, United States. The asteroid was named after Canadian astronomer David H. Levy.

    <span class="mw-page-title-main">1126 Otero</span>

    1126 Otero, provisional designation 1929 AC, is a rare-type Florian asteroid from the inner regions of the asteroid belt, approximately 10 kilometers in diameter. It was discovered on 11 January 1929, by German astronomer Karl Reinmuth at Heidelberg Observatory in southwest Germany. It was named after Spanish courtesan Carolina Otero.

    6084 Bascom, provisional designation 1985 CT, is a binary Phocaea asteroid from the inner regions of the asteroid belt, approximately 6.3 kilometers in diameter. It was discovered on 12 February 1985, by American astronomer couple Carolyn and Eugene Shoemaker at Palomar Observatory in California. It is named after American geologist Florence Bascom. Its satellite measures approximately 2.3 kilometers and has an orbital period of 43.51 hours.

    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.

    4029 Bridges, provisional designation 1982 KC1, is a stony asteroid and binary system from the middle regions of the asteroid belt, approximately 8 kilometers in diameter.

    29292 Conniewalker (provisional designation 1993 KZ1) is a bright, stony Phocaea asteroid and slow tumbler from the inner regions of the asteroid belt, approximately 4.6 kilometers in diameter. It was discovered on 24 May 1993, by American astronomer Carolyn Shoemaker and Canadian astronomer David Levy at the Palomar Observatory in California, United States.

    7225 Huntress, provisional designation 1983 BH, is a binary Florian asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter. It was discovered on 22 January 1983, by American astronomer Edward Bowell at Lowell's Anderson Mesa Station in Flagstaff, Arizona, United States. It is named after astrochemist Wesley Huntress.

    5905 Johnson, provisional designation 1989 CJ1, is a Hungaria asteroid and synchronous binary system from the innermost regions of the asteroid belt, approximately 4 kilometers (2.5 miles) in diameter. It was discovered on 11 February 1989, by American astronomer Eleanor Helin at Palomar Observatory in California, United States. Its satellite measures approximately 1.6 km (1 mi) in diameter and orbits its primary every 21.8 hours. It was named after American astronomer and engineer Lindley N. Johnson.

    19763 Klimesh is a stony Phocaea asteroid and slow rotator from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. Discovered by NEAT at Haleakala Observatory in 2000, the asteroid was named for NEAT's software specialist Matthew Klimesh.

    1979 Sakharov, provisionally designated 2006 P-L, is a stony Vestian asteroid from the inner regions of the asteroid belt, approximately 4.5 kilometers in diameter. It was discovered during the Palomar–Leiden survey in 1960, and named after Russian physicist Andrei Sakharov.

    4607 Seilandfarm, provisional designation 1987 WR, is a rare-type binary asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter.

    1405 Sibelius, provisional designation 1936 RE, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 8 kilometers in diameter. It was discovered on 12 September 1936, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland. The asteroid was named after composer Jean Sibelius.

    2815 Soma, provisional designation 1982 RL, is a binary Florian asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered on 15 September 1982, by American astronomer Edward Bowell at Lowell's Anderson Mesa Station in Flagstaff, Arizona, in the United States. It is named for the mechanical puzzle Soma cube.

    4786 Tatianina, provisional designation 1985 PE2, is a bright background asteroid and synchronous binary system from the inner regions of the asteroid belt, approximately 3.4 kilometers (2.1 miles) in diameter. It was discovered on 13 August 1985, by Soviet astronomer Nikolai Chernykh at the Crimean Astrophysical Observatory in Nauchnij, on the Crimean peninsula. It was named after Tatiana Somova, a friend of the discoverer. The E-/Xc-subtype has a short rotation period of 2.9 hours. Its sub-kilometer minor-planet moon was discovered on 20 March 2006 and announced the following month.

    7204 Ondřejov, provisional designation 1995 GH, is a stony asteroid from the middle region of the asteroid belt, approximately 6 kilometers in diameter. It was discovered on 3 April 1995, by Czech astronomer Petr Pravec at Ondřejov Observatory near Prague, Czech Republic.

    3982 Kastelʹ, provisional designation 1984 JP1, is a Florian asteroid and a suspected binary system from the inner regions of the asteroid belt, approximately 6.9 kilometers in diameter.

    10208 Germanicus, provisional designation 1997 QN1, is a stony Florian asteroid and binary system from the inner regions of the asteroid belt, approximately 3.5 kilometers in diameter.

    (15700) 1987 QD is a Mars-crossing asteroid and a binary candidate from inside the innermost region of the asteroid belt, approximately 3 kilometers in diameter. It was discovered on 24 August 1987, by American astronomer Stephen Singer-Brewster at the Palomar Observatory in California. The likely spherical X-type asteroid has a rotation period of 3.1 hours. The suspected presence of a kilometer-sized minor-planet moon was announced in November 2000.

    References

    1. 1 2 3 4 "JPL Small-Body Database Browser: 1338 Duponta (1934 XA)" (2017-05-06 last obs.). Jet Propulsion Laboratory . Retrieved 18 September 2017.
    2. 1 2 3 Schmadel, Lutz D. (2007). "(1338) Duponta". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 109. doi:10.1007/978-3-540-29925-7_1339. ISBN   978-3-540-00238-3.
    3. 1 2 3 4 5 6 7 8 9 10 "LCDB Data for (1338) Duponta". Asteroid Lightcurve Database (LCDB). Retrieved 18 September 2017.
    4. 1 2 "Asteroid 1338 Duponta – Nesvorny HCM Asteroid Families V3.0". Small Bodies Data Ferret. Retrieved 26 October 2019.
    5. 1 2 3 4 5 Gajdos, S.; Kornos, L.; Vilagi, J.; Galad, A.; Pravec, P.; Stephens, R.; et al. (March 2007). "(1338) Duponta". Central Bureau Electronic Telegrams. 910 (910): 1. Bibcode:2007CBET..910....1G . Retrieved 18 September 2017.
    6. 1 2 3 4 Johnston, Robert (21 September 2014). "(1338) Duponta". johnstonsarchive.net. Retrieved 18 September 2017.
    7. 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 18 September 2017.
    8. 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.
    9. 1 2 3 4 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 18 September 2017.
    10. 1 2 3 4 5 Pravec, P.; Scheirich, P.; Vokrouhlický, D.; Harris, A. W.; Kusnirák, P.; Hornoch, K.; et al. (March 2012). "Binary asteroid population. 2. Anisotropic distribution of orbit poles of small, inner main-belt binaries". Icarus. 218 (1): 125–143. Bibcode:2012Icar..218..125P. doi:10.1016/j.icarus.2011.11.026 . Retrieved 18 September 2017.
    11. 1 2 "1338 Duponta (1934 XA)". Minor Planet Center. Retrieved 18 September 2017.
    12. 1 2 Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). "Identification and Dynamical Properties of Asteroid Families". Asteroids IV. pp. 297–321. arXiv: 1502.01628 . Bibcode:2015aste.book..297N. doi:10.2458/azu_uapress_9780816532131-ch016. ISBN   9780816532131.