| Discovery[1] | |
|---|---|
| Discovered by | C. J. van Houten I. van Houten T. Gehrels |
| Discovery site | Palomar Obs. |
| Discovery date | 16 October 1977 |
| Designations | |
| (8776) Campestris | |
| Pronunciation | /kæmˈpɛstrɪs/[2] |
Named after | Anthus campestris (the tawny pipit)[3] |
| 2287 T-3 · 1990 SO10 | |
| main-belt · (middle)[4] background | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 38.98 yr (14,236 days) |
| Aphelion | 3.2415AU |
| Perihelion | 2.1392 AU |
| 2.6904 AU | |
| Eccentricity | 0.2049 |
| 4.41yr (1,612 days) | |
| 94.226° | |
| Inclination | 3.4400° |
| 300.27° | |
| 338.93° | |
| Physical characteristics | |
| Dimensions | 7.65 km(calculated)[4] 10.543±0.106 km[5][6] |
| 9.2982±0.0118h[4] 9.2990±0.0064 h[7] | |
| 0.058±0.008[5][6] 0.10(assumed)[4] | |
| S[4] | |
| 13.7[1][4] · 13.6[5] · 14.122±0.002(S)[7] · 13.734±0.002(R)[7] | |
8776 Campestris, provisional designation2287 T-3, is a stony backgroundasteroid from the central region of theasteroid belt, approximately 10 kilometers in diameter. It was discovered on 16 October 1977, by Dutch astronomer coupleIngrid andCornelis van Houten at Leiden Observatory, and Dutch–American astronomerTom Gehrels at thePalomar Observatory in California, United States.[8] The asteroid was named for thetawny pipit (Anthus campestris), a shorebird.[3]
Campestris is a non-family asteroid from the main belt'sbackground population. It orbits the Sun in thecentral main-belt at a distance of 2.1–3.2 AU once every 4 years and 5 months (1,612 days). Its orbit has aneccentricity of 0.20 and aninclination of 3° with respect to theecliptic.[1]
Thesurvey designation "T-3" stands for the thirdPalomar–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 Cornelis and Ingrid van Houten-Groeneveld at Leiden Observatory whereastrometry was carried out. The trio of astronomers are credited with the discovery of several thousand minor planets.[9]
Thisminor planet is named for the passerine birdAnthus campestris, ortawny pipit. It is on the Dutch Red List of birds endangered in the Netherlands.[3] It is also on theEuropean Red List of Birds as of 2015.[10] The official naming citation was published by theMinor Planet Center on 2 February 1999 (M.P.C. 33793).[11]
In 2012, two rotationallightcurves ofCampestris were obtained from photometric observations taken at thePalomar Transient Factory in California. Lightcurve analysis gave arotation period of9.2982 and9.2990 hours with a brightness variation of 0.35 and 0.38magnitude, respectively (U=2/2).[7]
According to the survey carried out by theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Campestris measures 10.5 kilometers in diameter and its surface has analbedo of 0.058.[5] TheCollaborative Asteroid Lightcurve Link assumes a higher albedo of 0.10 and calculates a diameter of 7.5 kilometers.[4]
