88 Thisbe

Thisbe, minor planet designation 88 Thisbe, is the 13th largest main-belt asteroids. It was discovered by C. H. F. Peters on June 15, 1866, and named after Thisbe, heroine of a Roman fable. An occultation of a star by Thisbe was observed on October 7, 1981. Results from the occultation indicate a larger than expected diameter of 232 km.[8][9]

88 Thisbe
A three-dimensional model of 88 Thisbe based on its light curve.
Discovery
Discovered byChristian Heinrich Friedrich Peters
Discovery dateJune 15, 1866
Designations
(88) Thisbe
Pronunciation/ˈθɪzbiː/[1]
Named after
Thisbē
Main belt
AdjectivesThisbean /θɪzˈbiːən/, /ˈθɪzbiən/
Orbital characteristics[2]
Epoch December 31, 2006 (JD 2454100.5)
Aphelion482.242 Gm (3.224 AU)
Perihelion345.809 Gm (2.312 AU)
414.025 Gm (2.768 AU)
Eccentricity0.165
1681.709 d (4.60 a)
165.454°
Inclination5.219°
276.765°
36.591°
Physical characteristics
Dimensions(255×232×193)±12 km[3]
225 km (mean)
232 km(Dunham)[2]
Mass1.83×1019 kg[3]
1.5×1019 kg[4][5]
Mean density
3.06±0.52 g/cm³[3]
6.04[6] h
0.067[2][7]
B [2]
7.04[2]

    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.[6]

    Perturbation

    Thisbe has been perturbed by asteroid 7 Iris and in 2001 Michalak estimated it to have a mass of 1.5×1019 kg.[4][5] But Iris is strongly perturbed by many minor planets such as 10 Hygiea and 15 Eunomia.[4]

    In 2008, Baer estimated Thisbe to have a mass of 1.05×1019 kg.[3] In 2011 Baer revised this to 1.83×1019 kg with an uncertainty of 1.09×1018 kg.[3]

    gollark: See last paragraph.
    gollark: ``` They're very gentle creatures, spending most of their lives flying lazy loops in the sky or draped decoratively over evergreen boughs and along eaves. Their green "garland" along their spine is modified dorsal fin, flexible, not stiff. Though they do eat normal small prey animals, the mainstay of their diet is mana absorbed through the green fins. They greatly prefer Life mana, but an abundance of any in a region will suffice. The berries are most often highly refined fire mana, and give gentle, comforting warmth to any who find one. They will gather in small groups in areas with higher than normal mana concentrations in the air, though they can be seen nearly anywhere. They appear to be oblivious to extremes of both hot and cold weather, though they're seen more often during the snowy months. It is believed that they actively convert excess mana to fire mana, which is then deliberately dropped in the form of their berries. If one finds a nest made by one of these dragons they will find a layer of the mana berries lining the bottom, presumably to keep the eggs warm while the parent is away. These dragons are believed to be the source of the practice of decorating homes and trees with garlands made of evergreen boughs and holly berries or cranberries.```The Wiki™.
    gollark: Oh, wait, it makes sense.
    gollark: ???
    gollark: Hub: has lots of 2G SAltkins.Me: is kind of annoyed that they all say SAltkin swap.

    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. 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.
    5. (Low mass estimate of Thisbe 0.074 / Mass of Ceres 4.75) * Mass of Ceres 9.43E+20 = 1.469E+19
    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, 36, pp. 1–8, Bibcode:1979A&AS...36....1S.
    7. Asteroid Data Sets Archived 2009-12-17 at the Wayback Machine
    8. Taylor, G. E., "Progress in accurate determinations of diameters of minor planets", Asteroids, comets, meteors; Proceedings of the Meeting, Uppsala, Sweden, June 20–22, 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

    This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.