1294 Antwerpia
Dark background asteroid
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1294 Antwerpia (prov. designation: 1933 UB1) is a dark background asteroid from the central regions of the asteroid belt. It was discovered on 24 October 1933, by astronomer Eugène Delporte at the Royal Observatory of Belgium in Uccle.[3] The carbonaceous C-type asteroid has a rotation period of 6.6 hours and measures approximately 35 kilometers (22 miles) in diameter. It was named for the Belgian city of Antwerp.[2]
_Antwerpia.png)
Shape model of Antwerpia from its lightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | E. Delporte |
| Discovery site | Uccle Obs. |
| Discovery date | 24 October 1933 |
| Designations | |
| (1294) Antwerpia | |
Named after | Antwerp (Belgian city)[2] |
| 1933 UB1 · 1930 AF 1932 LC · 1964 VA2 1964 XF · A917 DB | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 99.63 yr (36,391 days) |
| Aphelion | 3.3156 AU |
| Perihelion | 2.0572 AU |
| 2.6864 AU | |
| Eccentricity | 0.2342 |
| 4.40 yr (1,608 days) | |
| 16.166° | |
| 0° 13m 25.68s / day | |
| Inclination | 8.7271° |
| 81.133° | |
| 313.22° | |
| Physical characteristics | |
| 27.82±7.33 km[6] 34.71±3.0 km[7] 34.80±0.66 km[8] 37.199±0.134 km[9] 40.717±0.350 km[10] | |
| 6.63±0.01 h[11][12] | |
Pole ecliptic latitude | |
| 0.0887±0.0283[10] 0.10±0.09[6] 0.117±0.024[9] 0.1220±0.024[7] 0.125±0.005[8] | |
| 10.20[7][8][10] · 10.549±0.003 (R)[14] · 10.60[6] · 10.7[1][11] | |
Orbit and classification
Antwerpia is a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements.[4][5] It orbits the Sun in the central main belt at a distance of 2.1â3.3 AU once every 4 years and 5 months (1,608 days). Its orbit has an eccentricity of 0.23 and an inclination of 9° with respect to the ecliptic.[1] the asteroid was first observed as A917 DB at Heidelberg Observatory in February 2017, where the body's observation arc begins one month later in March 2017.[3]
Naming
This minor planet was named after the city of Antwerp in Flanders, the Dutch-speaking part of Belgium. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 118).[2]
Physical characteristics
In the SMASS classification, Antwerpia is a carbonaceous C-type asteroid.[1] It is also a C-type in both the Tholen- and SMASS-like taxonomy of the Small Solar System Objects Spectroscopic Survey (S3OS2).[5][13]
Rotation period and poles
Several rotational lightcurves of Antwerpia have been obtained from photometric observations since 2005. Lightcurve analysis gave a rotation period of 6.63 hours with a brightness variation of 0.42 magnitude (U=1/3/3-/3-/3/2).[15][16][17][14][18][12][a]
A 2016-published lightcurve, using modeled photometric data from the Lowell Photometric Database (LPD), gave a concurring period of 6.62521 hours (U=n.a.), as well as two spin axis of (128.0°, â66.0°) and (246.0°, â76.0°) in ecliptic coordinates (λ, β).[19]
Diameter and albedo
According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Antwerpia measures between 27.82 and 40.717 kilometers in diameter and its surface has an albedo between 0.0887 and 0.125.[6][7][8][9][10] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0783 and a diameter of 34.40 kilometers based on an absolute magnitude of 10.7.[11]
Notes
- Lightcurve plot of (1297) Quadea with a rotation period 6.62 hours and a brightness amplitude of 0.42 mag. Quality Code of 3. Taken by Robert Stephens (2014) at U81/CS3. Summary figures at LCDB
