| Discovery[1] | |
|---|---|
| Discovered by | T. Gehrels |
| Discovery site | Palomar Obs. |
| Discovery date | 24 March 1971 |
| Designations | |
| (1864) Daedalus | |
| Pronunciation | /ˈdɛdələs/[2] |
Named after | Daedalus(Greek mythology)[3] |
| 1971 FA | |
| Apollo · NEO[1][4] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 46.14 yr (16,854 days) |
| Aphelion | 2.3586AU |
| Perihelion | 0.5634 AU |
| 1.4610 AU | |
| Eccentricity | 0.6144 |
| 1.77yr (645 days) | |
| 23.049° | |
| 0° 33m 29.16s / day | |
| Inclination | 22.211° |
| 6.6379° | |
| 325.64° | |
| Earth MOID | 0.2693 AU |
| Physical characteristics | |
| Dimensions | 2.722±0.114 km[5] 3.00 km(derived)[6] 3.7 km[7] |
| 8.57h[8] 8.572 h[9] 8.575±0.002 h[10] | |
| 0.20(assumed)[6] 0.273±0.055[5][7] | |
| SQ(Tholen)[1] · Sr(SMASS)[1] Sq[11] · S[6] B–V = 0.830[1] U–B = 0.500[1] | |
| 14.85[1][5] · 14.98[6][9] | |
1864 Daedalus (provisional designation1971 FA) is a stonyasteroid andnear-Earth object of theApollo group, approximately 3 kilometers in diameter. It was discovered on 24 March 1971, by Dutch–American astronomerTom Gehrels atPalomar Observatory, California, and named afterDaedalus from Greek mythology.[4]
Daedalus is a member of theApollo asteroids, a group of near-Earth object with an Earth-crossing orbit. It orbits the Sun in theinner main-belt at a distance of 0.6–2.4 AU once every 1 years and 9 months (645 days). Its orbit has aneccentricity of 0.61 and aninclination of 22° with respect to theecliptic.[1] It has an Earth minimum orbit intersection distance (MOID) of 0.2693 AU.[1]
Daedalus is astony asteroid, characterized as an SQ and Srspectral type in theTholen andSMASS taxonomy.[1]
According to the survey carried out by NASA'sWide-field Infrared Survey Explorer with its subsequentNEOWISE mission, it measures 2.7 and 3.7 kilometers in diameter, respectively, and its surface has analbedo of 0.273.[5][7] TheCollaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and derives a diameter of 3.0 kilometers based on an absolutemagnitude of 14.98.[6]
Several rotationallightcurves of Daedalus were obtained by astronomersTom Gehrels,Petr Pravec andBrian Warner. Lightcurve analysis gave a concurringrotation period of 8.572 hours with a high brightness variation of 0.85–1.04 magnitude, indicating a non-spheroidal shape (U=3/3/3).[8][9][10]
Thisminor planet was named after the Greek mythological figureDaedalus, the builder of King Minos' labyrinth, who was subsequently imprisoned there with his son Icarus. They escaped on wings of feathers and wax, but whereas Icarus was drowned when the wax in his wings melted, Daedalus went on to Sicily and built there a temple to Apollo. There is also a lunar crater calledDaedalus.[3] The officialnaming citation was published by theMinor Planet Center on 20 December 1974 (M.P.C. 3758).[12]
