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88 Thisbe

Discovery
Discovered by	Christian Heinrich Friedrich Peters
Discovery date	15 June 1866
Designations
MPC designation	(88) Thisbe
Pronunciation	/ˈθɪzbiː/
Named after	Thisbē
Minor planet category	Main belt
Adjectives	Thisbean /θɪzˈbiːən/, /ˈθɪzbiən/
Orbital characteristics
Epoch 31 December 2006 (JD 2454100.5)
Aphelion	482.242 Gm (3.224 AU)
Perihelion	345.809 Gm (2.312 AU)
Semi-major axis	414.025 Gm (2.768 AU)
Eccentricity	0.165
Orbital period (sidereal)	1,681.709 d (4.60 yr)
Mean anomaly	165.454°
Inclination	5.219°
Longitude of ascending node	276.765°
Argument of perihelion	36.591°
Physical characteristics
Dimensions	(255×232×193)±12 km
Mean diameter	218±3 km 225 km 232 km (Dunham)
Flattening	0.19
Mass	(11.6±2.2)×10 kg 18.3×10 kg 1.5×10 kg
Mean density	2.14±0.42 g/cm 3.06±0.52 g/cm
Synodic rotation period	6.04 h
Geometric albedo	0.057 0.067
Spectral type	B
Absolute magnitude (H)	7.04

88 Thisbe is the 13th largest main-belt asteroid. It was discovered by C. H. F. Peters on 15 June 1866, and named after Thisbe, heroine of a Roman fable. This asteroid is orbiting the Sun at a distance of 2.768 AU with 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. 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.

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.

Perturbation

Thisbe has been perturbed by asteroid 7 Iris and in 2001 Michalak estimated it to have a mass of 15×10 kg. But Iris is strongly perturbed by many minor planets such as 10 Hygiea and 15 Eunomia.

In 2008, Baer estimated Thisbe to have a mass of 10.5×10 kg. In 2011 Baer revised this to 18.3×10 kg with an uncertainty of 1.1×10 kg.

Notes

1. Flattening derived from the maximum aspect ratio (c/a): ${\displaystyle f=1-{\frac {c}{a}}}$, where (c/a) = 0.81±0.07.
2. ^ (7.4 ± 1.3)×10 M_☉ = 1.47×10 kg

References

1. Noah Webster (1884). A Practical Dictionary of the English Language.
2. ^ Yeomans, Donald K., "88 Thisbe", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 25 March 2013.
3. ^ Jim Baer (2011). "Recent Asteroid Mass Determinations". Personal Website. Archived from the original on 2 July 2013. Retrieved 12 April 2012.
4. ^ P. Vernazza et al. (2021) VLT/SPHERE imaging survey of the largest main-belt asteroids: Final results and synthesis. Astronomy & Astrophysics 54, A56
5. ^ 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.
6. ^ 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.
7. Asteroid Data Sets Archived 2009-12-17 at the Wayback Machine
8. 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.
9. 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.
10. Observed minor planet occultation events, version of 2005 July 26
11. 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

External links

• 88 Thisbe at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 88 Thisbe at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters

• Minor planet object articles (numbered)
• Background asteroids
• Discoveries by Christian Peters
• Named minor planets
• CF-type asteroids (Tholen)
• B-type asteroids (SMASS)
• Astronomical objects discovered in 1866
• Pyramus and Thisbe