88 Thisbe
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88 Thisbe is the 13th largest main-belt asteroid. C. H. F. Peters discovered it on 15 June 1866, named after Thisbe, heroine of a Roman fable. This asteroid orbits the Sun at a distance of Template:Cvt over a period of Script error: No such module "convert". and an orbital eccentricity (ovalness) of 0.165. The orbital plane is inclined at an angle of 5.219° to the ecliptic.
On 7 October 1981, asteroid 88 Thisbe was observed to occult the 9th-magnitude star SAO 187124 from 12 sites. The timing of the different chords across the asteroid provided a diameter estimate of Script error: No such module "val".. This is 10% larger than the diameter estimate based on radiometric techniques.[1][2][3] During 2000, 88 Thisbe was observed by radar from the Arecibo Observatory. The return signal matched an effective diameter of 207 ± 22 km. This is consistent with the asteroid dimensions computed through other means.[4]
Photometric observations of this asteroid during 1977 gave a light curve with a period of 6.0422 ± 0.006 hours and a brightness variation of 0.19 in magnitude.[5]
Perturbation
Asteroid 7 Iris has perturbed Thisbe; in 2001, Michalak estimated it to have a mass of 15Template:E kg.[6]Template:Efn But Iris is strongly perturbed by many minor planets such as 10 Hygiea and 15 Eunomia.[6]
In 2008, Baer estimated Thisbe to have a mass of 10.5Template:E kg.[7] In 2011, Baer revised this to 18.3Template:E kg with an uncertainty of 1.1Template:E kg.[7]
Notes
References
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- ↑ Observed minor planet occultation events, version of 2005 July 26
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External links
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