_Bondia.png) Modelled shape ofBondia from itslightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | J. H. Metcalf |
| Discovery site | Winchester Obs. |
| Discovery date | 23 September 1913 |
| Designations | |
| (767) Bondia | |
Named after | William Cranch Bond (1789–1859) George Phillips Bond (1825–1865) (American astronomers)[2] |
| A913 SD · 1929 OA 1933 FO1 · 1938 DQ2 1957 UR · 1958 XA1 1959 AD · A902 SA 1913 SX | |
| main-belt[1][3] · (outer) Themis[4][5][6] | |
| Orbital characteristics[3] | |
| Epoch 31 May 2020 (JD 2459000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 117.59yr (42,949 d) |
| Aphelion | 3.6909AU |
| Perihelion | 2.5531 AU |
| 3.1220 AU | |
| Eccentricity | 0.1822 |
| 5.52 yr (2,015 d) | |
| 137.11° | |
| 0° 10m 43.32s / day | |
| Inclination | 2.4118° |
| 79.324° | |
| 269.09° | |
| Physical characteristics | |
| 8.3402±0.0007 h[10] | |
| SMASS =B[3][11] | |
767 Bondia (prov. designation:A913 SDor1913 SX) is aThemis asteroid from the outer regions of theasteroid belt, approximately 43 kilometers (27 miles) in diameter. It was discovered on 23 September 1913, by American astronomerJoel Hastings Metcalf at his observatory (799) in Winchester, Massachusetts.[1] TheB-type asteroid has arotation period of 8.3 hours. It was named afterWilliam Cranch Bond (1789–1859) and his sonGeorge Phillips Bond (1825–1865), both American astronomers and directors of theHarvard College Observatory in Cambridge, Massachusetts.[2]
Bondia is a core member theThemis family (602), a very largefamily of carbonaceous asteroids, named after24 Themis.[4][5][6][12]: 24 It orbits the Sun in theouter main-belt at a distance of 2.6–3.7 AU once every 5 years and 6 months (2,015 days;semi-major axis of 3.12 AU). Its orbit has aneccentricity of 0.18 and aninclination of 2° with respect to theecliptic.[3]
The Themistian asteroid was first observed asA902 SA (1902 SA) atHeidelberg Observatory on 26 September 1902. The body'sobservation arc begins atBergedorf Observatory in September 1915, or two years after its official discovery observation by Metcalf atWinchester Observatory.[1]
Thisminor planet was named after American astronomersWilliam Cranch Bond (1789–1859) and his sonGeorge Phillips Bond (1825–1865), both directors of theHarvard College Observatory in Cambridge, Massachusetts. Former co-discoveredComet 1850 II and pioneered the use ofphotographic plates in astronomy. The latter is best known for his 1848 co-discovery ofHyperion, amoon of Saturn. He also discovered Saturn's faint C Ring, also known asCrepe Ring. Thenaming citation was mentioned inThe Names of the Minor Planets byPaul Herget in 1955 (H 77).[2] The lunar cratersW. Bond andG. Bond were named in honor of the two American astronomers.[13][14] In addition, Martian craterBond was named after George Phillips.[15]
In the Bus–BinzelSMASS classification,Bondia is aB-type asteroid, a brighter variant of the common carbonaceousC-type asteroid.[3]
In October 2018, a rotationallightcurve ofBondia was obtained fromphotometric observations by Mexican astronomers at theNational Astronomical Observatory in San Pedro Mártir (OAN-SPM). Lightcurve analysis gave a well definedrotation period of8.3402±0.0007 hours with a brightness variation of0.27±0.02magnitude (U=3) and supersedes a previous observation bySzabó from 2016, who determined a period of at least60 hours and a low amplitude (U=2).[10][11]
According to the surveys carried out by the JapaneseAkari satellite and theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer (WISE),Bondia measures43.039±0.396 and46.91±0.66 kilometers in diameter and its surface has analbedo between0.095±0.022 and0.084, respectively.[7][8][9] TheCollaborative Asteroid Lightcurve Link derives an albedo of 0.0857 and a diameter of 41.40 kilometers based on anabsolute magnitude of 10.2.[11] Alternativemean diameter measurements published by the WISE team include (43.100±0.730 km), (45.3±4.5 km), (46.87±15.23 km) and (47±5 km) with corresponding albedos of (0.0956±0.0179), (0.9±0.02), (0.06±0.02) and (0.07±0.01).[11][16]
