_Bobhope.png) Shape model ofBobhope from itslightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | E. L. Johnson |
| Discovery site | Johannesburg Obs. |
| Discovery date | 9 August 1948 |
| Designations | |
| (2829) Bobhope | |
Named after | Bob Hope (American actor; comedian)[2] |
| 1948 PK · 1942 JH 1952 DU2 · 1952 HR 1959 RV · 1972 YZ | |
| main-belt · (outer)[3] Meliboea[4] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 68.64 yr (25,070 days) |
| Aphelion | 3.6742AU |
| Perihelion | 2.5074 AU |
| 3.0908 AU | |
| Eccentricity | 0.1888 |
| 5.43yr (1,985 days) | |
| 272.56° | |
| 0° 10m 53.04s / day | |
| Inclination | 14.301° |
| 324.06° | |
| 339.21° | |
| Physical characteristics | |
| 32.14±9.31 km[5] 36.29±12.47 km[6] 38.25±2.4 km[7] 40.89±0.87 km[8] 40.98±0.54 km[9] 41.361±0.224 km[10] 44.804±0.511 km[11] | |
| 5.013±0.003 h[12] 6.0888±0.0007 h[13] | |
| 0.05±0.03[6] 0.055±0.010[10][8] 0.06±0.05[5] 0.0668±0.0182[11] 0.080±0.003[9] 0.0916±0.013[7] | |
| C[3] | |
| 10.3[7][9][11] · 10.70[5][8] · 10.8[1][3] · 10.95±0.48[14] · 11.12[6] | |
2829 Bobhope (prov. designation:1948 PK) is a darkasteroid of theMeliboea family, from the outer region of theasteroid belt. It was discovered on 9 August 1948, by South African astronomerErnest Leonard Johnson atUnion Observatory in Johannesburg.[15] The asteroid was later named after comedianBob Hope.[2] The asteroid has arotation period of 6.1 hours and measures approximately 37 kilometers (23 miles) in diameter.
Bobhope is a member of theMeliboea family,[4] a smallerasteroid family of carbonaceous outer-belt asteroids with a few hundred members, named after137 Meliboea.[16]: 23 It orbits the Sun in theouter main-belt at a distance of 2.5–3.7 AU once every 5 years and 5 months (1,985 days). Its orbit has aneccentricity of 0.19 and aninclination of 14° with respect to theecliptic.[1] It was first observed as1942 JH at the discovering observatory in May 1942, yet the astrometric data from this observation remained unused to extend itsobservation arc prior to the official discovery date.[15]
Thisminor planet was named for English-born, American comedianBob Hope (1903–2003), star of innumerable feature film, theater, TV and radio productions, and known for the horror comedyCat and the Canary (1939).[2] He hosted theAcademy Awards more than any other host, and received several Honorary and Special Oscars himself. Hope also received more than forty honorary doctorates.[2] Thenaming was published by theMinor Planet Center on 1 September 1993 (M.P.C. 22496).[17]
Bobhope has been characterized as a carbonaceousC-type asteroid,[3] which agrees with the overallspectral type of the Meliboea family.[16]: 23
A rotationallightcurve ofBobhope was obtained fromphotometric observations by astronomer Landy Carbo at Oakley Southern Sky Observatory (E09), Australia, and at the U.S.Oakley Observatory in September 2008. It gave it arotation period of5.013±0.003 hours with a brightness variation of0.46±0.08magnitude (U=2).[12] A previously published lightcurve by French amateur astronomerBernard Christophe gave a somewhat longer period of6.0888±0.0007 hours with an amplitude of 0.50 (U=2).[13]
According to the surveys carried out by the Infrared Astronomical SatelliteIRAS, the JapaneseAkari satellite, and NASA'sWide-field Infrared Survey Explorer with its subsequentNEOWISE mission,Bobhope measures between 32.14 and 40.98 kilometers in diameter and its surface has analbedo between 0.05 and 0.0916.[5][6][7][8][9] More dated NEOWISE publications gave a larger diameter of 41.361 and 44.8 kilometers, respectively.[10][11] TheCollaborative Asteroid Lightcurve Link derives an albedo of 0.0586 and a diameter of 38.0 kilometers with anabsolute magnitude of 10.8.[3]
