1704 Wachmann

1704 Wachmann

Light curve based 3D-model of 1704 Wachmann
Discovery [1]
Discovered by K. Reinmuth
Discovery site Heidelberg Obs.
Discovery date 7 March 1924
Designations
MPC designation 1704 Wachmann
Named after
 Arno Wachmann
(astronomer)[2]
A924 EE · 1947 CE
1957 BJ
main-belt · (inner) [3]
Orbital characteristics [1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 92.05 yr (33,620 days)
Aphelion 2.4159 AU
Perihelion 2.0294 AU
2.2227 AU
Eccentricity 0.0870
3.31 yr (1,210 days)
307.82°
0° 17m 50.64s / day
Inclination 0.9710°
259.53°
281.01°
Physical characteristics
Dimensions 6.934±0.070 km[4]
7.82 km (calculated)[3]
3.314±0.001 h[5]
0.1767±0.0133[4]
0.20 (assumed)[3]
S [3]
12.9[1][3]
12.97±0.13[6]
13.3[4]

    1704 Wachmann, provisional designation A924 EE, is a stony asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered by German astronomer Karl Reinmuth at Heidelberg Observatory on 7 March 1924.[7]

    The S-type asteroid orbits the Sun at a distance of 2.0–2.4 AU once every 3 years and 4 months (1,210 days). Its orbit has an eccentricity of 0.09 and an inclination of 1° with respect to the ecliptic.[1] No precoveries were taken and the asteroid's observation arc begins 3 days after its official discovery date.[7]

    In April 2007, a rotational light-curve for this asteroid was obtained at the U.S. Sandia View Observatory in New Mexico (H03). The light-curve gave a well-defined rotation period of 3.314±0.001 hours with a brightness variation of 0.40 in magnitude (U=3).[5]

    According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, the asteroid measures 6.9 kilometers in diameter and its surface has an albedo of 0.177,[4] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 7.8 kilometers, based on an absolute magnitude of 12.9.[3]

    The minor planet was named for Arno Wachmann (1902–1990), long-time astronomer at the Bergedorf Observatory in Hamburg, discoverer of minor planets and comets, and observer of variable and binary stars. He is best known for the co-discovery of the three "Schwassmann–Wachmann" comets, 29P, 31P and 73P.[2] Naming citation was published before November 1977 (M.P.C. 3933).[8]

    References

    1. 1 2 3 4 "JPL Small-Body Database Browser: 1704 Wachmann (A924 EE)" (2016-03-27 last obs.). Jet Propulsion Laboratory. Retrieved 20 July 2016.
    2. 1 2 Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (1704) Wachmann. Springer Berlin Heidelberg. pp. 135–136. ISBN 978-3-540-00238-3. Retrieved 20 July 2016.
    3. 1 2 3 4 5 6 "LCDB Data for (1704) Wachmann". Asteroid Lightcurve Database (LCDB). Retrieved 20 July 2016.
    4. 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" (PDF). The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407Freely accessible. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 20 July 2016.
    5. 1 2 Julian, William M., II (March 2008). "Period Determination for 1704 Wachmann". The Minor Planet Bulletin. 35 (1): 4. Bibcode:2008MPBu...35....4J. ISSN 1052-8091. Retrieved 20 July 2016.
    6. ↑ 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:1506.00762Freely accessible. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 20 July 2016.
    7. 1 2 "1704 Wachmann (A924 EE)". Minor Planet Center. Retrieved 20 July 2016.
    8. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 20 July 2016.

    External links

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