.png) Lightcurve-based 3D-model ofSappho | |
| Discovery | |
|---|---|
| Discovered by | N. R. Pogson |
| Discovery site | Madras Obs. |
| Discovery date | 2 May 1864 |
| Designations | |
| (80) Sappho | |
| Pronunciation | /ˈsæfoʊ/[1] |
Named after | Sappho(Greek poet) |
| main-belt · (inner) | |
| Adjectives | Sapphonian/sæˈfoʊniən/[2] Sapphoian/sæˈfoʊ.iən/[3] |
| Symbol | .svg) (astrological) |
| Orbital characteristics[4] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Aphelion | 2.7544 AU (412.05 Gm) |
| Perihelion | 1.8370 AU (274.81 Gm) |
| 2.2957 AU (343.43 Gm) | |
| Eccentricity | 0.19980 |
| 3.48yr (1270.5d) | |
| 287.260° | |
| 0° 17m 0.06s / day | |
| Inclination | 8.676° |
| 218.699° | |
| 139.662° | |
| Earth MOID | 0.843652 AU (126.2085 Gm) |
| Jupiter MOID | 2.7319 AU (408.69 Gm) |
| TJupiter | 3.553 |
| Physical characteristics[4] | |
| 68.563±1.033 km | |
| Mass | (4.6 ± 2.11/0.86)×1017 kg[5] |
Meandensity | 3.055 ± 1.400/0.569 g/cm3[5][a] |
| 14.03087[6] h | |
| 194°[6] | |
| −26°[6] | |
| 0.206±0.014[4] 0.185[7] | |
| S-type asteroid | |
| 9.38 to 13.6 | |
| 7.98 | |
80 Sappho (symbol:
)is a large,S-type (stony)main-beltasteroid. It was discovered by English astronomerNorman Pogson on 2 May 1864, and is named afterSappho, theArchaic Greecepoet. The asteroid is orbiting theSun at a distance of2.2957 AU with aperiod of 3.48 years and aneccentricity (ovalness) of 0.2. Theorbital plane is inclined at an angle of 8.68° to theplane of the ecliptic.[4]
13-cm radar observations of this asteroid from theArecibo Observatory between 1980 and 1985 were used to produce a diameter estimate of 83 kilometres (52 mi).[8] Hanuš et al. (2013) confirmed the polar axis hasecliptic coordinates(λ, β) =(194°, −26°) and listed arotation period of 14.03087 h.[6]
Sappho (atapparent magnitude 11.8)occulted the magnitude 7.2 star HIP 24403 in theconstellation ofTaurus on 16 September 2018 at 8:54 UT.[9][10] 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 roughly 1.6 AU (240,000,000 km; 150,000,000 mi) from Earth with an uncertainty of ±76 km.
