2429 Schürer

From Wikipedia, the free encyclopedia
Jump to: navigation, search
2429 Schürer
Discovery [1]
Discovered by P. Wild
Discovery site Zimmerwald Obs.
Discovery date 12 October 1977
MPC designation 2429 Schurer
Named after
Max Schürer
1977 TZ · A915 TB
Eunomia[3] · Maria[4]
Orbital characteristics[1]
Epoch 27 June 2015 (JD 2457200.5)
Uncertainty parameter 0
Observation arc 100.09 yr (36,559 days)
Aphelion 2.8292 AU
Perihelion 2.3140 AU
2.5716 AU
Eccentricity 0.1001
4.12 yr (1,506 days)
Inclination 15.050°
Physical characteristics
Dimensions 15.95±0.38 km[5]
12.517±0.026 km[6]
15.99±0.26 km[7]
12.09 km (caculated)[3]
6.66 h[8]
7.070 h[4]
7.45±0.01 h[a]
0.21 (assumed)[3]

2429 Schürer, provisional designation 1977 TZ, is a stony asteroid from the inner regions of the asteroid belt, about 14 kilometers in diameter. It was discovered by Swiss astronomer Paul Wild at Zimmerwald Observatory near Bern, Switzerland, on 12 October 1977.[9]

The Collaborative Asteroid Lightcurve Link (CALL) classifies the asteroid as a member of the Eunomia family, a large group of S-type asteroids and the most prominent family in the intermediate main-belt. However, based on its concurring orbital elements, Alvarez-Candal from the Universidad Nacional de Córdoba, groups the asteroid into the Maria family, which is named after 170 Maria (also see 9175 Graun).[4]:389

It orbits the Sun at a distance of 2.3–2.8 AU once every 4 years and 1 month (1,506 days). Its orbit shows an eccentricity of 0.10 and is tilted by 15 degrees to the plane of the ecliptic. The body's rotation period has been determined by three different photometric light-curve observations, that gave a period between 6.7 and 7.5 hours.[a][4][8] The asteroid's albedo amounts to 0.10–0.20, according to the surveys carried out by the Japanese Akari satellite (0.10) and the Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission (0.12 and 0.20), while CALL assumes an albedo of 0.21, which results in the lowest of all estimated diameters for the body (12.1 km).[3][5][6][7]

The minor planet was named in honor of Swiss astronomer Max Schürer (1910–1997), who was director of the Astronomical Institute of the University of Bern from 1947 to 1980. Due to his initiative, endurance, and great technical competence, the discovering observatory at Zimmerwald – after which the asteroid 1775 Zimmerwald is named – could be build in 1956. He did a lot of orbit computation on asteroids when he was a pupil of astronomer Sigmund Mauderli (1876–1962), who was the preceding director of the Astronomical Institute (also see 1748 Mauderli). Schürer also dealt with stellar dynamics and was deeply involved as a pioneer in satellite geodesy.[2]


  1. ^ a b Seifert (2011) web: rotation period 7.45±0.01 hours with a brightness amplitude of 0.12 mag. Summary figures at Collaborative Asteroid Lightcurve Link (CALL) for (2429) Schurer
  1. ^ a b c "JPL Small-Body Database Browser: 2429 Schurer (1977 TZ)" (2015-11-13 last obs.). Jet Propulsion Laboratory. Retrieved December 2015. 
  2. ^ a b Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (2429) Schürer. Springer Berlin Heidelberg. p. 198. ISBN 978-3-540-29925-7. Retrieved December 2015. 
  3. ^ a b c d e "LCDB Data for (2429) Schurer". Asteroid Lightcurve Database (LCDB). Retrieved December 2015. 
  4. ^ a b c d Alvarez-Candal, Alvaro; Duffard, René; Angeli, Cláudia A.; Lazzaro, Daniela; Fernández, Silvia (December 2004). "Rotational lightcurves of asteroids belonging to families". Icarus 172 (2): 388–401. Bibcode:2004Icar..172..388A. doi:10.1016/j.icarus.2004.06.008. Retrieved December 2015. 
  5. ^ a b c Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved December 2015. 
  6. ^ a b c 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 December 2015. 
  7. ^ a b c Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; Cabrera, M. S. (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 December 2015. 
  8. ^ a b Kim, M.-J.; Choi, Y.-J.; Moon, H.-K.; Byun, Y.-I.; Brosch, N.; Kaplan, M.; et al. (March 2014). "Rotational Properties of the Maria Asteroid Family". The Astronomical Journal 147 (3): 15. arXiv:1311.5318. Bibcode:2014AJ....147...56K. doi:10.1088/0004-6256/147/3/56. Retrieved December 2015. 
  9. ^ "2429 Schurer (1977 TZ)". Minor Planet Center. Retrieved December 2015. 

External links[edit]