![]() Shape model of Campanula from its
lightcurve | |
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 | 2.8655 AU |
Perihelion | 1.9220 AU |
2.3938 AU | |
Eccentricity | 0.1971 |
3.70 yr (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] | |
Pole
ecliptic latitude | |
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 designation 1926 TK, is a presumed Erigonian asteroid, approximately 9 kilometers (5.6 miles) in diameter, located in the inner region of the asteroid belt. It was discovered on 6 October 1926, by German astronomer Karl Reinmuth at the Heidelberg Observatory in southwest Germany. [14] The asteroid was named after the bellflower Campanula. [3]
Campanula is considered to be a member of the Erigone family ( 406), [4] which is named after 163 Erigone, while other sources classify it as a background asteroid, not associated to any known asteroid family. [15] [13] It orbits the Sun in the inner main-belt at a distance of 1.9–2.9 AU once every 3 years and 8 months (1,353 days). Its orbit has an eccentricity of 0.20 and an inclination of 5 ° with respect to the ecliptic. [1] The body's observation arc begins at Heidelberg, 2 months after its official discovery observation. [14]
This minor planet was named for the bellflower Campanula. The official naming citation was mentioned in The Names of the Minor Planets by Paul 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 with 1054 Forsytia, that were all named after plants, in particular flowering plants (also see list of minor planets named after animals and plants). [16]
Campanula is an assumed stony S-type asteroid, [4] which is not in line with the darker C- and X-types seen among the Erigonian asteroids. [17]: 23
Several rotational lightcurves of Campanula were obtained from photometric observations. Lightcurve analysis gave a rotation period of 3.847 to 3.852 hours with a brightness variation of 0.24 to 0.40 magnitude ( 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°) in ecliptic coordinates (λ, β). [11]
According to observations taken at the Balzaretto Observatory ( A81) and the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Campanula measures between 7.55 and 9.709 kilometers in diameter and its surface has an albedo between 0.225 and 0.33. [5] [6] [7] [8] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 9.40 kilometers based on an absolute magnitude of 12.50. [4]