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88 Thisbe

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88 Thisbe
VLT-SPHERE image of Thisbe
Discovery
Discovered byChristian Heinrich Friedrich Peters
Discovery date15 June 1866
Designations
Pronunciation/ˈθɪzbiː/[1]
Named after
Thisbē
Main belt
AdjectivesThisbean /θɪzˈbiːən/, /ˈθɪzbiən/
Orbital characteristics[2]
Epoch 9 June 2026 (JD 2461200.5)
Uncertainty parameter 0
Aphelion3.2244 AU
Perihelion2.3081 AU
2.7662 AU
Eccentricity0.1656
1,680.46 d (4.60 yr)
244.361°
Inclination5.2262°
276.320°
36.967°
TJupiter3.313
Physical characteristics
Dimensions241 × 221 × 195 km
(± 13 × 12 × 12 km)[3]
218±3 km[3]
Mass(8.75±0.13)×1018 kg (2025)[4][a]
(7.20±0.43)×1018 kg (2023)[5]
Mean density
1.61±0.07 g/cm3 (2025)[4]
1.33±0.10 g/cm3 (2023)[5]
6.041321±0.000001 h[3]
21°[3]
350° ± 3°[3]
116° ± 3°[3]
0.057[3]
0.0671 ± 0.003[2]
0.067[6]
B[2]
7.04[3]
7.24[2]

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 2.768 AU over a period of 4.60 years 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 232±12 km. This is 10% larger than the diameter estimate based on radiometric techniques.[7][8][9] 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.[10]

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.[11]

Perturbation

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Asteroid 7 Iris has perturbed Thisbe; in 2001, Michalak estimated it to have a mass of 15×1018 kg.[12][b] But Iris is strongly perturbed by many minor planets such as 10 Hygiea and 15 Eunomia.[12]

In 2008, Baer estimated Thisbe to have a mass of 10.5×1018 kg.[13] In 2011, Baer revised this to 18.3×1018 kg with an uncertainty of 1.1×1018 kg.[13]

Notes

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  1. ↑ Calculated from its standard gravitational parameter GM = 0.584±0.009 km3/s2.
  2. ↑ (7.4 ± 1.3)×10−12 M☉ = 1.47×1019 kg

References

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  1. ↑ Noah Webster (1884). A Practical Dictionary of the English Language.
  2. 1 2 3 4 Yeomans, Donald K., "88 Thisbe", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 25 March 2013.
  3. 1 2 3 4 5 6 7 8 Vernazza, P.; Ferrais, M.; Jorda, L.; Hanuš, J.; Carry, B.; Marsset, M.; et al. (October 2021). "VLT/SPHERE imaging survey of the largest main-belt asteroids: Final results and synthesis". Astronomy & Astrophysics. 654: A56. Bibcode:2021A&A...654A..56V. doi:10.1051/0004-6361/202141781. hdl:10261/263281. S2CID 239104699. A56.
  4. 1 2 Fuentes-Muñoz, Oscar; Farnocchia, Davide; Giorgini, Jon D.; Park, Ryan S. (1 December 2025). "Asteroid Mass Estimation by Mutual Perturbations During Close Encounters After Gaia Focused Product Release". The Astronomical Journal. 170 (6): 353. Bibcode:2025AJ....170..353F. doi:10.3847/1538-3881/ae0cc9. ISSN 0004-6256. S2CID 283347135.
  5. 1 2 Li 李, Fan 凡; Yuan 袁, Ye 烨; Fu 傅, Yanning 燕宁; Chen 陈, Jian 健 (1 September 2023). "Dynamical Masses of 20 Asteroids Determined with Gaia DR3 Asteroid Observations". The Astronomical Journal. 166 (3): 93. Bibcode:2023AJ....166...93L. doi:10.3847/1538-3881/ace52b. ISSN 0004-6256. S2CID 260534542.
  6. ↑ Asteroid Data Sets Archived 2009-12-17 at the Wayback Machine
  7. ↑ Millis, R. L.; et al. (February 1983), "The diameter of 88 THISBE from its occultation of SAO 187124", Astronomical Journal, 88: 229–235, Bibcode:1983AJ.....88..229M, doi:10.1086/113310, hdl:2060/19820025413.
  8. ↑ Taylor, G. E., "Progress in accurate determinations of diameters of minor planets", Asteroids, comets, meteors; Proceedings of the Meeting, Uppsala, Sweden, 20–22 June 1983, pp. 107–109, Bibcode:1983acm..proc..107T.
  9. ↑ Observed minor planet occultation events, version of 2005 July 26
  10. ↑ Magri, Christopher; et al. (January 2007), "A radar survey of main-belt asteroids: Arecibo observations of 55 objects during 1999–2003", Icarus, 186 (1): 126–151, Bibcode:2007Icar..186..126M, doi:10.1016/j.icarus.2006.08.018
  11. ↑ Schober, H. J.; et al. (April 1979), "Photoelectric photometry and rotation periods of three large and dark asteroids - 49 Pales, 88 Thisbe and 92 Undina", Astronomy and Astrophysics Supplement Series, vol. 36, pp. 1–8, Bibcode:1979A&AS...36....1S.
  12. 1 2 Michalak, G. (2001). "Determination of asteroid masses". Astronomy & Astrophysics. 374 (2): 703–711. Bibcode:2001A&A...374..703M. doi:10.1051/0004-6361:20010731. Retrieved 6 November 2008.
  13. 1 2 Jim Baer (2011). "Recent Asteroid Mass Determinations". Personal Website. Archived from the original on 2 July 2013. Retrieved 12 April 2012.
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