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7088 Ishtar

Asteroid named after goddess Ishtar

Field	Value
minorplanet	yes
name	7088 Ishtar
background	#FFC2E0
discovery_ref
discoverer	C. Shoemaker
discovery_site	Palomar Obs.
discovered	1 January 1992
mpc_name	(7088) Ishtar
alt_names	1992 AA
pronounced
named_after	Ishtar
(Mesopotamian goddess)
mp_category	NEOAmor
Binary
orbit_ref
epoch	27 April 2019 (JD 2458600.5)
uncertainty	0
observation_arc	38.52 yr (14,071 d)
aphelion	2.7551 AU
perihelion	1.2057 AU
semimajor	1.9804 AU
eccentricity	0.3912
period	2.79 yr (1,018 d)
mean_anomaly	284.83°
mean_motion	/ day
inclination	8.3045°
asc_node	102.65°
arg_peri	354.73°
satellites	1
(P:20.65 h; D: 330 m)
moid	0.2230 AU (86.9 LD)
mean_diameter

rotation
albedo
spectral_type	U
abs_magnitude	16.7
16.80

(Mesopotamian goddess) Binary (P:20.65 h; D: 330 m)

16.80

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

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. 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.

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 was published by the Minor Planet Center on 22 April 1997 (M.P.C. 29671).

Physical characteristics

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

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 hours with a brightness amplitude of 0.11 magnitude ().

Satellite

Diameter ratio 0.42 Eclipse and occultation events provide a mean-diameter-ratio of with the primary having a diameter of . It is a binary asteroid with a synodic orbital period of .

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. 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.

References

"Ishtar". [[Oxford University Press]].

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

amor-asteroids discoveries-by-carolyn-s.-shoemaker discoveries-by-eugene-merle-shoemaker named-minor-planets binary-asteroids astronomical-objects-discovered-in-1992 inanna

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