88 Thisbe

Main-belt asteroid

88 Thisbe

Discovery
Discovered by| Christian Heinrich Friedrich Peters
Discovery date| 15 June 1866
Designations

MPC designation

| (88) Thisbe
Pronunciation| /ˈθɪzbiː/[1]

Named after

| Thisbē

Minor planet category

| Main belt
Adjectives| Thisbean /θɪzˈbiːən/, /ˈθɪzbiən/
Orbital characteristics[2]
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[3]

Mean diameter

| 218±3 km[4]
225 km[3]
232 km (Dunham)[2]
Flattening| 0.19[a]
Mass| (11.6±2.2)×1018 kg[4]
18.3×1018 kg[3]
1.5×1019 kg[5][b]

Mean density

| 2.14±0.42 g/cm3[4]
3.06±0.52 g/cm3[3]

Synodic rotation period

| 6.04[6] h

Geometric albedo

| 0.057[4]
0.067[7]

Spectral type

| B[2]

Absolute magnitude (H)

| 7.04[2]

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.[8][9][10] 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.[11]

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.[6]

## Perturbation

[edit]

Thisbe has been perturbed by asteroid 7 Iris and in 2001 Michalak estimated it to have a mass of 15×1018 kg.[5][b] But Iris is strongly perturbed by many minor planets such as 10 Hygiea and 15 Eunomia.[5]

In 2008, Baer estimated Thisbe to have a mass of 10.5×1018 kg.[3] In 2011 Baer revised this to 18.3×1018 kg with an uncertainty of 1.1×1018 kg.[3]

## Notes

[edit]

1. ^ Flattening derived from the maximum aspect ratio (c/a):  f = 1 − c a {\displaystyle f=1-{\frac {c}{a}}} , where (c/a) = 0.81±0.07.[4]
2. ^ a b (7.4 ± 1.3)×10−12 M☉ = 1.47×1019 kg

## References

[edit]

1. ^ Noah Webster (1884). A Practical Dictionary of the English Language.
2. ^ a b c d Yeomans, Donald K., "88 Thisbe", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 25 March 2013.
3. ^ a b c d e f Jim Baer (2011). "Recent Asteroid Mass Determinations". Personal Website. Archived from the original on 2 July 2013. Retrieved 12 April 2012.
4. ^ a b c d e P. Vernazza et al. (2021) VLT/SPHERE imaging survey of the largest main-belt asteroids: Final results and synthesis. Astronomy & Astrophysics 54, A56
5. ^ a b c 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 2008.703-711&rft.date=2001&rft_id=info:doi/10.1051/0004-6361:20010731&rft_id=info:bibcode/2001A&A...374..703M;&rft.aulast=Michalak&rft.aufirst=G.&rft_id=https://www.aanda.org/articles/aa/full/2001/29/aa10228/aa10228.html&rfr_id=info:sid/en.wikipedia.org:88+Thisbe" class="Z3988">
6. ^ a b 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.1-8&rft.date=1979-04&rft_id=info:bibcode/1979A&AS...36....1S;&rft.aulast=Schober&rft.aufirst=H.+J.&rft.au=Scaltriti,+F.&rft.au=Zappala,+V.&rfr_id=info:sid/en.wikipedia.org:88+Thisbe" class="Z3988">
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:2060/19820025413.229-235&rft.date=1983-02&rft_id=info:hdl/2060/19820025413&rft_id=info:doi/10.1086/113310&rft_id=info:bibcode/1983AJ.....88..229M&rft.aulast=Millis&rft.aufirst=R.+L.&rft.au=Wasserman,+L.+H.&rft.au=Franz,+O.+G.&rft.au=White,+N.+M.&rft.au=Bowell,+E.&rft.au=Klemola,+A.&rft.au=Elliott,+R.+C.&rft.au=Smethells,+W.+G.&rft.au=Price,+P.+M.&rft.au=McKay,+C.+P.&rft.au=Steel,+D.+I.&rft.au=Everhart,+E.&rft.au=Everhart,+E.+M.&rfr_id=info:sid/en.wikipedia.org:88+Thisbe" class="Z3988">
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.107-109&rft_id=info:bibcode/1983acm..proc..107T&rft.aulast=Taylor&rft.aufirst=G.+E.&rfr_id=info:sid/en.wikipedia.org:88+Thisbe" class="Z3988">
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.2006.08.018126-151&rft.date=2007-01&rft_id=info:doi/10.1016/j.icarus.2006.08.018&rft_id=info:bibcode/2007Icar..186..126M&rft.aulast=Magri&rft.aufirst=Christopher&rft.au=Nolan,+Michael+C.&rft.au=Ostro,+Steven+J.&rft.au=Giorgini,+Jon+D.&rfr_id=info:sid/en.wikipedia.org:88+Thisbe" class="Z3988">

## External links

[edit]

* 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

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