7548 Engström
| Discovery [1] | |
|---|---|
| Discovered by | C.-I. Lagerkvist |
| Discovery site | La Silla Obs. |
| Discovery date | 16 March 1980 |
| Designations | |
| MPC designation | 7548 Engström |
Named after |
Albert Engström (Swedish artist)[2] |
|
1980 FW2 · 1993 QA4 1999 TS324 | |
| main-belt · Themis [3] | |
| Orbital characteristics [1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 35.72 yr (13,048 days) |
| Aphelion | 3.6490 AU |
| Perihelion | 2.6427 AU |
| 3.1458 AU | |
| Eccentricity | 0.1599 |
| 5.58 yr (2,038 days) | |
| 80.7770° | |
| 0° 10m 35.76s / day | |
| Inclination | 0.3172° |
| 346.7302° | |
| 296.2804° | |
| Physical characteristics | |
| Dimensions |
11.067±0.129 km[4] 7.70 km (calculated)[3] |
| 5.2309±0.0059 h[5] | |
|
0.0574±0.0089[4] 0.08 (assumed)[3] | |
| C [3] | |
|
13.5[1][4] 13.93[3] 13.477±0.005 (R)[5] 13.64±0.21[6] | |
|
| |
7548 Engström, provisional designation 1980 FW2, is dark Themistian asteroid from the outer region of the asteroid belt, approximately 10 kilometers in diameter. It was discovered on 16 March 1980, by Swedish astronomer Claes-Ingvar Lagerkvist at ESO's La Silla Observatory site in northern Chile.[7]
The carbonaceous C-type asteroid is a member of the Themis family, a dynamical family of outer-belt asteroids with nearly coplanar ecliptical orbits. It orbits the Sun at a distance of 2.6–3.6 AU once every 5 years and 7 months (2,038 days). Its orbit has an eccentricity of 0.16 and an inclination of 0.3° with respect to the ecliptic.[1] No precoveries were taken prior to the asteroid's discovery.[7]
In 2010, photometric observations at the U.S. Palomar Transient Factory, California, gave a rotational light-curve with a period of 5.2309±0.0059 hours and a brightness amplitude of 0.35 in magnitude (U=2).[5]
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, the asteroid measures 11.1 km in diameter and its surface has a low albedo of 0.057,[4] while the Collaborative Asteroid Lightcurve Link (CALL) assumes an albedo of 0.08 and calculates a smaller diameter of 7.7 kilometers, based on an absolute magnitude of 13.93.[3]
The minor planet was named after Albert Engström (1869–1940), Swedish artist and author, who became a member of the esteemed Swedish academy in 1922. He was born in Lönneberga, Småland. After his studies of Greek and Latin at Uppsala University, he went on to Valand School of Fine Arts in Gothenburg. Renowned painter of caricatures and founder of the humor magazine Strix, he is best known for his black and white illustrations.[2] Naming citation was published on 11 April 1998 (M.P.C. 31611).[8]
References
- 1 2 3 4 "JPL Small-Body Database Browser: 7548 Engstrom (1980 FW2)" (2015-12-06 last obs.). Jet Propulsion Laboratory. Retrieved 17 May 2016.
- 1 2 Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (7548) Engström. Springer Berlin Heidelberg. p. 603. ISBN 978-3-540-00238-3. Retrieved 14 April 2016.
- 1 2 3 4 5 6 "LCDB Data for (7548) Engstrom". Asteroid Lightcurve Database (LCDB). Retrieved 14 April 2016.
- 1 2 3 4 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407
. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 17 May 2016. - 1 2 3 Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David; et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal. 150 (3): 35. arXiv:1504.04041. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 17 May 2016.
- ↑ Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 17 May 2016.
- 1 2 "7548 Engstrom (1980 FW2)". Minor Planet Center. Retrieved 14 April 2016.
- ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 17 May 2016.
External links
- 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 (5001)-(10000) – Minor Planet Center
- 7548 Engström at the JPL Small-Body Database
