13025 Zürich
| Discovery [1] | |
|---|---|
| Discovered by | P. Wild |
| Discovery site | Zimmerwald Obs. |
| Discovery date | 28 January 1989 |
| Designations | |
| MPC designation | 13025 Zürich |
Named after | Zürich (Swiss city)[2] |
| 1989 BA | |
| main-belt · Phocaea [3] | |
| Orbital characteristics [1] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 40.03 yr (14,622 days) |
| Aphelion | 3.0428 AU |
| Perihelion | 1.7206 AU |
| 2.3817 AU | |
| Eccentricity | 0.2775 |
| 3.68 yr (1,343 days) | |
| 118.57° | |
| 0° 16m 5.16s / day | |
| Inclination | 23.924° |
| 342.71° | |
| 140.93° | |
| Earth MOID | 0.7757 AU |
| Physical characteristics | |
| Dimensions |
4.89±0.10 km[4] 5.28 km (calculated)[3] |
| 18.53±0.02 h[5] | |
|
0.322±0.083[4] 0.23 (assumed)[3] | |
| S [3] | |
| 13.6[1] | |
|
| |
13025 Zürich, provisional designation 1989 BA, is a stony Phocaea asteroid from the inner regions of the asteroid belt, approximately 5 kilometers in diameter. It was discovered on 28 January 1989, by Swiss astronomer Paul Wild at Zimmerwald Observatory near Bern, Switzerland.[6]
The stony S-type asteroid is a member of the Phocaea family, a rather small group of asteroids with similar orbital characteristics, named after its largest member, 25 Phocaea. It orbits the Sun at a distance of 1.7–3.0 AU once every 3 years and 8 months (1,343 days). Typical for members of this family, its orbit has an eccentricity of 0.28 and an inclination of 24° with respect to the ecliptic.[1]
In 2006, American astronomer Brian Warner obtained a rotational light-curve from photometric observations made at his Palmer Divide Observatory in Colorado. The light-curve showed a rotation period of 18.53±0.02 hours and a brightness amplitude of 0.24 in magnitude (U=2+).[5]
According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, the asteroid measures 4.9 kilometers in diameter and its surface has a high albedo of 0.32,[4] while the Collaborative Asteroid Lightcurve Link (CALL) assumes an albedo of 0.23 and hence calculates a somewhat larger diameter of 5.3 kilometers.[3]
The minor planet is named after Zürich, Switzerland's largest city and economic center, located at the northwestern tip of Lake Zürich. It was founded by the Romans in the 1st century BC on the rivers Sihl and Limmat and was then called Turicum.[2]
References
- 1 2 3 4 "JPL Small-Body Database Browser: 13025 Zurich (1989 BA)" (2015-06-21 last obs.). Jet Propulsion Laboratory. Retrieved April 2016.
- 1 2 Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (13025) Zürich. Springer Berlin Heidelberg. p. 792. ISBN 978-3-540-00238-3. Retrieved April 2016.
- 1 2 3 4 5 "LCDB Data for (13025) Zurich". Asteroid Lightcurve Database (LCDB). Retrieved April 2016.
- 1 2 3 Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters 759 (1): 5. arXiv:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved April 2016.
- 1 2 Warner, Brian D. (June 2007). "Asteroid Lightcurve Analysis at the Palmer Divide Observatory - September-December 2006". The Minor Planet Bulletin 34 (2): 32–37. Bibcode:2007MPBu...34...32W. ISSN 1052-8091. Retrieved April 2016.
- ↑ "13025 Zurich (1989 BA)". Minor Planet Center. Retrieved April 2016.
External links
- The Palmer Divide Observatory: Tour given by Brian Warner on YouTube (time 4:03 min.)
- Asteroid Lightcurve Database (LCDB), query form (info)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (10001)-(15000) – Minor Planet Center
- 13025 Zürich at the JPL Small-Body Database
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