_Campanula.png) Shape model ofCampanula from itslightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 6 October 1926 |
| Designations | |
| (1077) Campanula | |
| Pronunciation | /kæmˈpænjʊlə/[2] |
Named after | Campanula(bellflower)[3] |
| 1926 TK · 1957 AJ 1972 CB | |
| main-belt · (inner) Erigone[4] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 90.56 yr (33,077 days) |
| Aphelion | 2.8655AU |
| Perihelion | 1.9220 AU |
| 2.3938 AU | |
| Eccentricity | 0.1971 |
| 3.70yr (1,353 days) | |
| 218.36° | |
| 0° 15m 57.96s / day | |
| Inclination | 5.3941° |
| 346.20° | |
| 13.591° | |
| Physical characteristics | |
| 7.55±1.72 km[5] 9±2 km[6] 9.709±0.278 km[7][8] | |
| 3.847±0.002 h[a] 3.850±0.001 h[9][10] 3.850486±0.000001 h[11] 3.85085±0.00005 h[6] 3.852±0.002 h[12] | |
| 0.225±0.017[7] 0.2253±0.0169[8] 0.33±0.12[5] | |
| S[4]V–R =0.400±0.070[6] | |
| 12.3[14][1] | |
1077 Campanula, provisional designation1926 TK, is a presumedErigonian asteroid, approximately 9 kilometers (5.6 miles) in diameter, located in the inner region of theasteroid belt. It was discovered on 6 October 1926, by German astronomerKarl Reinmuth at theHeidelberg Observatory in southwest Germany.[14] The asteroid was named after the bellflowerCampanula.[3]
Campanula is considered to be a member of theErigone family (406),[4] which is named after163 Erigone, while other sources classify it as a background asteroid, not associated to any knownasteroid family.[15][13] It orbits the Sun in theinner main-belt at a distance of 1.9–2.9 AU once every 3 years and 8 months (1,353 days). Its orbit has aneccentricity of 0.20 and aninclination of 5° with respect to theecliptic.[1] The body'sobservation arc begins at Heidelberg, 2 months after its official discovery observation.[14]
Thisminor planet was named for the bellflowerCampanula. The official naming citation was mentioned inThe Names of the Minor Planets byPaul Herget in 1955 (H 102).[3]
Due to his many discoveries,Karl Reinmuth submitted a large list of 66 newly named asteroids in the early 1930s. The list covered his discoveries with numbers between(1009) and(1200). This list also contained a sequence of 28 asteroids, starting with1054 Forsytia, that were all named after plants, in particularflowering plants(also see list of minor planets named after animals and plants).[16]
Campanula is an assumed stonyS-type asteroid,[4] which is not in line with the darkerC- andX-types seen among the Erigonian asteroids.[17]: 23
Several rotationallightcurves ofCampanula were obtained from photometric observations. Lightcurve analysis gave arotation period of 3.847 to 3.852 hours with a brightness variation of 0.24 to 0.40magnitude (U=3-/3/3/3).[6][9][10][12][a] A 2016-published lightcurve, using modeled photometric data from the Lowell Photometric Database (LPD), gave a concurring period of 3.850486 hours (U=n.a.), as well as two spin axis of (178.0°, 76.0°) and (313.0°, 59.0°) inecliptic coordinates (λ, β).[11]
According to observations taken at the Balzaretto Observatory (A81) and the survey carried out by theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Campanula measures between 7.55 and 9.709 kilometers in diameter and its surface has analbedo between 0.225 and 0.33.[5][6][7][8] TheCollaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 9.40 kilometers based on anabsolute magnitude of 12.50.[4]
