7088 Ishtar

Last updated

7088 Ishtar
Discovery  [1]
Discovered by C. Shoemaker
Discovery site Palomar Obs.
Discovery date1 January 1992
Designations
(7088) Ishtar
Pronunciation /ˈɪʃtɑːr/ [2]
Named after
 Ishtar   [1]
(Mesopotamian goddess)
1992 AA
NEO  · Amor   [1] [3]
Binary   [4] [5]
Orbital characteristics   [3]
Epoch 27 April 2019 (JD 2458600.5)
Uncertainty parameter 0
Observation arc 38.52 yr (14,071 d)
Aphelion 2.7551 AU
Perihelion 1.2057 AU
1.9804 AU
Eccentricity 0.3912
2.79 yr (1,018 d)
284.83°
0° 21m 12.96s / day
Inclination 8.3045°
102.65°
354.73°
Known satellites 1 [4] [5]
(P:20.65 h; D: 330 m) [4] [6] [7]
Earth  MOID 0.2230 AU (86.9 LD)
Physical characteristics
Mean diameter
1.298±0.261  km (primary) [8]
1.51 km(effective) [9]
2.6790±0.0002  h [6] [7]
0.260±0.122 [8]
U  [10]
16.7 [1]
16.80 [3] [8]

    7088 Ishtar, provisional designation 1992 AA, is a synchronous binary asteroid and near-Earth object from the Amor group, approximately 1.3 kilometers (0.81 miles) in diameter. It was discovered on 1 January 1992, by American astronomer Carolyn Shoemaker at the Palomar Observatory in California. [1] The relatively bright asteroid with an unknown spectral type has a rotation period of 2.7 hours. [10] [11] In December 2005, a 330-meter sized satellite was discovered, orbiting its primary every 20.65 hours. [6]

    Contents

    Orbit and classification

    Ishtar orbits the Sun at a distance of 1.2–2.8  AU once every 2 years and 9 months (1,018 days; semi-major axis of 1.98 AU). Its orbit has an eccentricity of 0.39 and an inclination of 8° with respect to the ecliptic. [3] The body's observation arc begins with its first observation at the Siding Spring Observatory in March 1981, almost 11 years prior to its official discovery observation at Palomar. [1]

    Naming

    This minor planet was named after the ancient Mesopotamian goddess Ishtar (Inanna). She is the principal goddess of the Assyrians and Babylonians associated with love, fertility, sex and war. The official naming citation was published by the Minor Planet Center on 22 April 1997 ( M.P.C. 29671). [12]

    Physical characteristics

    Ishtar has an unknown spectral type (U). [10] The Collaborative Asteroid Lightcurve Link (CALL) assumes standard S-type asteroid due to its relatively high albedo (see below). [11]

    Rotation period

    In December 2005, a rotational lightcurve of Ishtar was obtained from photometric observations by Vishnu Reddy and collaborators. Lightcurve analysis gave a rotation period of 2.6790±0.0002  h hours with a brightness amplitude of 0.11 magnitude ( U=3 ). [6] [7] [13]

    Diameter and albedo

    According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Ishtar measures 1.298 kilometers in diameter and its surface has an albedo of 0.26. [8] [7] The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.20 and derives a diameter of 1.16 kilometers based on an absolute magnitude of 17.08. [11]

    Related Research Articles

    1509 Esclangona, provisional designation 1938 YG, is a rare-type Hungaria asteroid and binary system from the inner regions of the asteroid belt, approximately 8 kilometers in diameter. It is named after French astronomer Ernest Esclangon.

    2006 Polonskaya (provisional designation: 1973 SB3) is a stony Flora asteroid and asynchronous binary system from the inner regions of the asteroid belt, approximately 5 kilometers (3.1 miles) in diameter. It was discovered on 22 September 1973, by Soviet astronomer Nikolai Chernykh at the Crimean Astrophysical Observatory in Nauchnij, on the Crimean peninsula, and later named after Ukrainian astronomer Elena Kazimirtchak-Polonskaïa. Its one-kilometer-sized satellite was discovered by an international collaboration of astronomers in November 2005.

    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.

    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.

    1916 Boreas, provisional designation 1953 RA, is an eccentric, stony asteroid and near-Earth object of the Amor group, approximately 3 kilometers in diameter. After its discovery in 1953, it became a lost asteroid until 1974. It was named after Boreas from Greek mythology.

    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.

    8116 Jeanperrin, provisional designation 1996 HA15, is a Florian asteroid and synchronous binary system from the inner regions of the asteroid belt, approximately 4.8 kilometers (3 miles) in diameter. It was discovered on 17 April 1996, by Belgian astronomer Eric Elst at the La Silla Observatory in northern Chile. The likely stony S-type asteroid has a rotation period of 3.62 hours and a nearly round shape. It was named for French physicist and Nobel laureate Jean Baptiste Perrin. A minor-planet moon, a third the size of its primary, was discovered in 2007.

    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.

    5481 Kiuchi, provisional designation 1990 CH, is a bright binary Vestian asteroid from the inner regions of the asteroid belt, approximately 4 kilometers in diameter. It was discovered on 15 February 1990, by Japanese astronomers Kin Endate and Kazuro Watanabe at Kitami Observatory in Hokkaidō, Japan, and named after their colleague Tsuruhiko Kiuchi. The V-type asteroid has a rotation period of 3.6 hours.

    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.

    13123 Tyson, provisional designation 1994 KA, is a stony Phocaea asteroid and an asynchronous binary system from the inner regions of the asteroid belt, approximately 10 kilometers in diameter. It was discovered on May 16, 1994, by American astronomer Carolyn Shoemaker and Canadian astronomer David Levy at the Palomar Observatory in California, United States. The asteroid was named for Neil deGrasse Tyson, American astrophysicist and popular science communicator.

    3402 Wisdom, provisional designation 1981 PB, is a stony asteroid and Mars-crosser on an eccentric orbit from the inner regions of the asteroid belt, approximately 2.5 kilometers in diameter. It was discovered on 5 August 1981, by American astronomer Edward Bowell at Lowell's Anderson Mesa Station near Flagstaff, Arizona, in the United States. The presumed bright S-type asteroid has a rotation period of 4.99 hours. It was named after American planetary scientist Jack Wisdom.

    5477 Holmes, provisional designation 1989 UH2, is a Hungaria asteroid and binary system from the innermost regions of the asteroid belt, approximately 3 kilometers (2 miles) in diameter. It was discovered on 27 October 1989, by American astronomer Eleanor Helin at the Palomar Observatory in California. The presumed E-type asteroid is likely spherical in shape and has a short rotation period of 2.99 hours. It was named for American amateur astronomer Robert Holmes. The discovery of its 1-kilometer-sized minor-planet moon was announced in November 2005.

    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.

    <span class="nowrap">(175706) 1996 FG<sub>3</sub></span>

    (175706) 1996 FG3 is a carbonaceous asteroid and binary system, classified as near-Earth object and potentially hazardous asteroid of the Apollo group, approximately 1.7 kilometers (1.1 miles) in diameter. The primary has a spheroidal shape. Its minor-planet moon measures approximately 490 meters (1,600 feet) in diameter.

    (31345) 1998 PG is an eccentric, stony asteroid and binary system, classified as near-Earth object of the Amor group of asteroids, approximately 900 meters in diameter. It minor-planet moon, S/2001 (31345) 1, has an estimated diameter of 270 meters.

    <span class="nowrap">(66063) 1998 RO<sub>1</sub></span> Stony near-Earth object of the Aten group

    (66063) 1998 RO1 is a stony near-Earth object of the Aten group on a highly-eccentric orbit. The synchronous binary system measures approximately 800 meters (0.50 miles) in diameter. It was discovered by astronomers of the Lincoln Near-Earth Asteroid Research at the Lincoln Laboratory's Experimental Test Site near Socorro, New Mexico, on 14 September 1998.

    32008 Adriángalád, provisional designation: 2000 HM53, is a background asteroid and synchronous binary system from the inner regions of the asteroid belt, approximately 4 kilometers (2.5 miles) in diameter. It was discovered on 29 April 2000, by astronomers with the LINEAR program at Lincoln Laboratory's Experimental Test Site near Socorro, New Mexico, in the United States. The V-type asteroid has a rotation period of 3.0 hours. It was named for Slovak astronomer Adrián Galád. Its 1.6-kilometer sized minor-planet moon was discovered in August 2007.

    (15700) 1987 QD, provisional designation 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 5 6 "7088 Ishtar (1992 AA)". Minor Planet Center. Retrieved 5 October 2019.
    2. ↑ "Ishtar". Lexico UK English Dictionary. Oxford University Press. Archived from the original on 22 March 2020.
    3. 1 2 3 4 "JPL Small-Body Database Browser: 7088 Ishtar (1992 AA)". Jet Propulsion Laboratory (2019-09-11 last obs.). Retrieved 5 October 2019.
    4. 1 2 3 Johnston, Wm. Robert (29 May 2019). "Asteroids with Satellites Database – 7088 Ishtar (1992 AA)". Johnston's Archive. Retrieved 5 October 2019.
    5. 1 2 Lance A. M. Benner (18 November 2013). "Binary and Ternary near-Earth Asteroids detected by radar". NASA/JPL Asteroid Radar Research. Archived from the original on 8 June 2004. Retrieved 1 March 2014.
    6. 1 2 3 4 Reddy, V.; Dyvig, R.; Pravec, P.; Kusnirak, P. (February 2005). "2005 AB". IAU Circ. 8483 (8483): 3. Bibcode:2005IAUC.8483....3R. ((7088) Ishtar, CBET 384)
    7. 1 2 3 4 Pravec, P.; Scheirich, P.; Kusnirák, P.; Hornoch, K.; Galád, A.; Naidu, S. P.; et al. (March 2016). "Binary asteroid population. 3. Secondary rotations and elongations". Icarus. 267: 267–295. Bibcode:2016Icar..267..267P. doi: 10.1016/j.icarus.2015.12.019 .
    8. 1 2 3 4 Masiero, Joseph R.; Nugent, C.; Mainzer, A. K.; Wright, E. L.; Bauer, J. M.; Cutri, R. M.; et al. (October 2017). "NEOWISE Reactivation Mission Year Three: Asteroid Diameters and Albedos". The Astronomical Journal. 154 (4): 10. arXiv: 1708.09504 . Bibcode:2017AJ....154..168M. doi: 10.3847/1538-3881/aa89ec . S2CID   45334910.
    9. ↑ "Asteroid 7088 Ishtar". Small Bodies Data Ferret. Retrieved 5 October 2019.
    10. 1 2 3 Carry, B.; Solano, E.; Eggl, S.; DeMeo, F. E. (April 2016). "Spectral properties of near-Earth and Mars-crossing asteroids using Sloan photometry". Icarus. 268: 340–354. arXiv: 1601.02087 . Bibcode:2016Icar..268..340C. doi:10.1016/j.icarus.2015.12.047. S2CID   119258489.
    11. 1 2 3 "LCDB Data for (7088) Ishtar". Asteroid Lightcurve Database (LCDB). Retrieved 5 October 2019.
    12. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 5 October 2019.
    13. ↑ Reddy, V.; Dyvig, R. R.; Pravec, P.; Kusnirák, P.; Gajdos, S.; Galád, A.; et al. (March 2007). "Photometric Observations of Binary Near-Earth Asteroid (7088) Ishtar and (11405) 1999 CV3" (PDF). 38th Lunar and Planetary Science Conference (PDF) (1338): 1239. Bibcode:2007LPI....38.1239R . Retrieved 5 October 2019.
    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.