2429 Schürer

2429 Schürer
Discovery [1]
Discovered by P. Wild
Discovery site Zimmerwald Obs.
Discovery date 12 October 1977
Designations
MPC designation 2429 Schurer
Named after
 Max Schürer
(astronomer)[2]
1977 TZ · A915 TB
main-belt
Eunomia [3] · Maria [4]
Orbital characteristics [1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc 100.44 yr (36687 days)
Aphelion 2.8307 AU (423.47 Gm)
Perihelion 2.3146 AU (346.26 Gm)
2.5727 AU (384.87 Gm)
Eccentricity 0.10031
4.13 yr (1507.2 d)
79.147°
0° 14m 19.86s / day
Inclination 15.051°
17.910°
29.726°
Earth MOID 1.33027 AU (199.006 Gm)
Jupiter MOID 2.58164 AU (386.208 Gm)
Jupiter Tisserand parameter 3.374
Physical characteristics
Dimensions 15.95±0.38 km[5]
12.517±0.026 km[6]
15.99±0.26 km[7]
12.09 km (calculated)[3]
6.66 h (0.278 d)[8]
7.070 h[4]
7.45±0.01 h[lower-alpha 1]
0.096±0.005[5]
0.1976±0.0440[6]
0.120±0.023[7]
0.21 (assumed)[3]
S [3]
12.0[1]

    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.[lower-alpha 1][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]

    References

    1. 1 2 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. 1 2 3 "JPL Small-Body Database Browser: 2429 Schurer (1977 TZ)" (2015-11-13 last obs.). Jet Propulsion Laboratory. Retrieved 15 April 2016.
    2. 1 2 Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (2429) Schürer. Springer Berlin Heidelberg. p. 198. ISBN 978-3-540-29925-7. Retrieved 10 December 2015.
    3. 1 2 3 4 5 "LCDB Data for (2429) Schurer". Asteroid Lightcurve Database (LCDB). Retrieved 10 December 2015.
    4. 1 2 3 4 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 10 December 2015.
    5. 1 2 3 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 10 December 2015.
    6. 1 2 3 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:1109.6407Freely accessible. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 10 December 2015.
    7. 1 2 3 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:1209.5794Freely accessible. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 10 December 2015.
    8. 1 2 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:1311.5318Freely accessible. Bibcode:2014AJ....147...56K. doi:10.1088/0004-6256/147/3/56. Retrieved 10 December 2015.
    9. ↑ "2429 Schurer (1977 TZ)". Minor Planet Center. Retrieved 10 December 2015.

    External links

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