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Sappho (/ˈsæf/ SAF-oh; minor planet designation: 80 Sappho) is a large main-belt S-type asteroid. It was discovered by Norman Pogson on May 2, 1864, and is named after Sappho, the Greek poet.

80 Sappho
80Sappho (Lightcurve Inversion).png
Lightcurve-based 3D-model of Sappho
Discovery
Discovered byN. R. Pogson
Discovery siteMadras Obs.
Discovery date2 May 1864
Designations
MPC designation(80) Sappho
Named after
Sappho (Greek poet)
main-belt · (inner)
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Aphelion2.7544 AU (412.05 Gm)
Perihelion1.8370 AU (274.81 Gm)
2.2957 AU (343.43 Gm)
Eccentricity0.19980
3.48 yr (1270.5 d)
287.260°
0° 17m 0.06s / day
Inclination8.676°
218.699°
139.662°
Earth MOID0.843652 AU (126.2085 Gm)
Jupiter MOID2.7319 AU (408.69 Gm)
TJupiter3.553
Physical characteristics[1]
Dimensions68.563±1.033 km
14.03087[2] h
194[2]
−26[2]
0.206±0.014[1]
0.185 [3]
S-type asteroid
9.38 to 13.6
7.98

13-cm radar observations of this asteroid from the Arecibo Observatory between 1980 and 1985 were used to produce a diameter estimate of 83 kilometres (52 mi).[4] Hanuš et al. (2013) confirmed the polar axis has ecliptic coordinates (λ, β) = (194°, −26°) and listed a rotation period of 14.03087 h.[2]

Sappho (at apparent magnitude 11.8) occulted the magnitude 7.2 star HIP 24403 in the constellation of Taurus on 16 September 2018 at 8:54 UT.[5][6] Sacramento and Salt Lake City were the two major cities located underneath the shadow path. Data from this event will help improve the shape model of the asteroid. During the occultation the asteroid was be roughly 1.6 AU (240,000,000 km; 150,000,000 mi) from Earth with an uncertainty of ±76 km.


ReferencesEdit

  1. ^ a b c "80 Sappho", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 2013-03-30.
  2. ^ a b c d Hanuš, J.; et al. (September 2013), "Sizes of main-belt asteroids by combining shape models and Keck adaptive optics observations", Icarus, 226 (1): 1045−1057, arXiv:1308.0446, Bibcode:2013Icar..226.1045H, doi:10.1016/j.icarus.2013.07.023.
  3. ^ Asteroid Data Sets Archived 2010-01-17 at WebCite
  4. ^ Ostro, S. J.; et al. (August 1985), "Mainbelt asteroids - Dual-polarization radar observations", Science, 229 (4712), pp. 442–446, Bibcode:1985Sci...229..442O, doi:10.1126/science.229.4712.442, PMID 17738665.
  5. ^ "Interactive GoogleMap of Shadow Path". Archived from the original on 2018-02-21. Retrieved 2018-02-21.
  6. ^ http://www.asteroidoccultation.com/2018_09/0916_80_56486.htm

External linksEdit