| Discovery[1] | |
|---|---|
| Discovered by | C. J. van Houten I. van Houten-G. T. Gehrels |
| Discovery site | Palomar Obs. |
| Discovery date | 29 September 1973 |
| Designations | |
| (5655) Barney | |
Named after | Ida Barney[1] (American astronomer) |
| 1159 T-2 · 1988 EN1 | |
| main-belt[1][2] · (middle) Maria[3] | |
| Orbital characteristics[2] | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 44.56yr (16,277 d) |
| Aphelion | 2.6804AU |
| Perihelion | 2.4765 AU |
| 2.5784 AU | |
| Eccentricity | 0.0395 |
| 4.14 yr (1,512 d) | |
| 52.666° | |
| 0° 14m 17.16s / day | |
| Inclination | 14.497° |
| 193.49° | |
| 21.237° | |
| Physical characteristics | |
| 6.11 km(calculated)[4] 6.599±0.055 km[5][6] | |
| 2.661±0.0003 h[7] | |
| 0.20(assumed)[4] 0.256±0.028[5][6] | |
| S[4][8][9] | |
| 12.985±0.002(R)[7] 13.0[6] 13.1[2] 13.26±0.28[8] 13.43[4] | |
5655 Barney, provisional designation1159 T-2, is a Mariaasteroid from the central regions of theasteroid belt, approximately 6.5 kilometers (4 miles) in diameter. It was discovered during the secondPalomar–Leiden Trojan survey in 1973, and named for American astronomerIda Barney in 1994.[1] The stonyS-type asteroid has arotation period of 2.66 hours.[4]
Barney is a core member of theMaria family (506),[3] a large intermediate beltfamily ofstony asteroids.[10] It orbits the Sun in thecentral main-belt at a distance of 2.5–2.7 AU once every 4 years and 2 months (1,512 days;semi-major axis of 2.58 AU). Its orbit has aneccentricity of 0.04 and aninclination of 14° with respect to theecliptic.[2]
Barney was discovered on 29 September 1973, by Dutch astronomer coupleIngrid andCornelis van Houten at Leiden, on photographic plates taken by Dutch–American astronomerTom Gehrels at the U.S.Palomar Observatory, California. Noprecoveries were taken prior to its discovery. The body'sobservation arc begins with its official discovery observation.[1]
Thesurvey designation "T-2" stands for the secondPalomar–Leiden Trojan survey, named after the fruitful collaboration of the Palomar andLeiden Observatory in the 1960s and 1970s. Gehrels used Palomar'sSamuel Oschin telescope (also known as the 48-inch Schmidt Telescope), and shipped thephotographic plates to Ingrid and Cornelis van Houten at Leiden Observatory whereastrometry was carried out. The trio are credited with the discovery ofseveral thousand asteroid discoveries.[11]
Barney has been characterized as a stonyS-type asteroid in theSDSS taxonomy of the Moving Object Catalog (MOC) and by the survey conducted byPan-STARRS.[4][8][9]
In August 2010, a rotationallightcurve ofBarney was obtained fromphotometric observations in the R-band by astronomers at thePalomar Transient Factory in California. Lightcurve analysis gave arotation period of 2.661 hours with a brightness amplitude of 0.20magnitude (U=2).[4][7]
According to the survey carried out by theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Barney measures 6.599 kilometers in diameter and its surface has analbedo of 0.256.[5][6] TheCollaborative Asteroid Lightcurve Link assumes a standard albedo for a stony asteroid of 0.20 and calculates a diameter of 6.11 kilometers based on anabsolute magnitude of 13.43.[4]
Thisminor planet was named in memory of American astronomerIda Barney (1886–1982), who worked at theYale University Observatory during 1924–1959. She supervised and significantly contributed to theYale Observatory Zone Catalog for which the positions and proper motions of a large number stars were measured.[1] The official naming citation was published by theMinor Planet Center on 25 May 1994 (M.P.C. 23541).[12]
