1635 Bohrmann

1635 Bohrmann

<div style="padding:0.1em 0;line-height:1.2em;"padding: 5px 0;"">A light curve based 3D-model of 1635 Bohrmann
Discovery [1]
Discovered by K. Reinmuth
Discovery site Heidelberg Obs.
Discovery date 7 March 1924
Designations
MPC designation 1635 Bohrmann
Named after
 Alfred Bohrmann
(astronomer[2]
1924 QW · 1931 VH1
1936 UJ · 1938 CH
1939 HL · 1943 EG1
1948 EA1 · 1953 FH
main-belt · Koronis [3]
Orbital characteristics [1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 92.27 yr (33,703 days)  
Aphelion 3.0170 AU
Perihelion 2.6899 AU
2.8535 AU
Eccentricity 0.0573
4.82 yr (1,761 days)
275.56°
0° 12m 16.2s / day
Inclination 1.8221°
184.35°
135.88°
Physical characteristics
Dimensions 16.60±0.82 km[4]
17.12 km (calculated)[3]
17.533±0.244 km[5]
19.12±0.70 km[6]
5.864±0.001 h[7]
5.86427±0.00005 h[8]
11.73±0.01 h[9]
11.730±0.005 h[10]
0.187±0.015[6]
0.2104±0.0154[5]
0.24 (assumed)[3]
0.255±0.052[4]
SMASS = S [1] · S [3]
10.95±0.01[7]
11.0[1][3][4]
11.05±0.24[11]
11.1[5][6]

    1635 Bohrmann, provisional designation 1924 QW, is a stony Koronian asteroid from the outer region of the asteroid belt, approximately 17 kilometers in diameter. It was discovered on 7 March 1924, by German astronomer Karl Reinmuth at Heidelberg Observatory in southern Germany.[12]

    The stony S-type asteroid belongs to the Koronis family, a group consisting of few hundred known bodies with nearly ecliptical orbits. It orbits the Sun at a distance of 2.7–3.0 AU once every 4 years and 10 months (1,761 days). Its orbit has an eccentricity of 0.06 and an inclination of 2° with respect to the ecliptic.[1] As no precoveries were taken, the asteroid's observation arc begins with the first used observation taken on the night following its discovery.[12]

    According to the surveys carried out by the Japanese Akari satellite and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, the asteroid measures between 16.6 and 19.1 kilometers in diameter, and its surface has an albedo between 0.187 and 0.255.[4][5][6] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for members of the Koronian family of 0.24, and calculates a diameter of 17.1 kilometers, based on an absolute magnitude of 11.0.[3]

    In September and October 2003, four rotational light-curves were obtained for this asteroid from photometric observations at several observatories around the world, including the Whitin Observatory in Wellesley, Massachusetts, as well as by U.S. astronomers Robert D. Stephens and Brian D. Warner. The light-curves gave two different solutions for the body's rotation period. One solution gave 5.864±0.001[7] and 5.86427±0.00005[8] hours, while the alternative solution gave 11.73±0.01[9] and 11.730±0.005[10] hours. The light-curves had a concurring brightness variation of 0.25 in magnitude (U=2/2/3/n.a.).[3]

    The minor planet was named after German astronomer Alfred Bohrmann (1904–2000), a long-time observer of minor planets at the discovering Heidelberg Observatory and a discoverer of minor planets himself. During his career he had published several hundreds of precise observations of asteroids.[2] Naming citation was published before November 1977 (M.P.C. 3931).[13]

    References

    1. 1 2 3 4 5 "JPL Small-Body Database Browser: 1635 Bohrmann (1924 QW)" (2016-06-16 last obs.). Jet Propulsion Laboratory. Retrieved 6 August 2016.
    2. 1 2 Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (1635) Bohrmann. Springer Berlin Heidelberg. p. 130. ISBN 978-3-540-00238-3. Retrieved 6 August 2016.
    3. 1 2 3 4 5 6 7 "LCDB Data for (1635) Bohrmann". Asteroid Lightcurve Database (LCDB). Retrieved 6 August 2016.
    4. 1 2 3 4 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:1209.5794Freely accessible. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 6 August 2016.
    5. 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 6 August 2016.
    6. 1 2 3 4 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 6 August 2016.
    7. 1 2 3 Slivan, Stephen M.; Binzel, Richard P.; Boroumand, Shaida C.; Pan, Margaret W.; Simpson, Christine M.; Tanabe, James T.; et al. (May 2008). "Rotation rates in the Koronis family, complete to H≈11.2". Icarus. 195 (1): 226–276. Bibcode:2008Icar..195..226S. doi:10.1016/j.icarus.2007.11.019. Retrieved 6 August 2016.
    8. 1 2 Hanus, J.; Durech, J.; Broz, M.; Warner, B. D.; Pilcher, F.; Stephens, R.; et al. (June 2011). "A study of asteroid pole-latitude distribution based on an extended set of shape models derived by the lightcurve inversion method". Astronomy and Astrophysics. 530: 16. Bibcode:2011A&A...530A.134H. doi:10.1051/0004-6361/201116738. Retrieved 6 August 2016.
    9. 1 2 Simpson, Christine M. (March 2004). "Rotation period and lightcurve of asteroid 1635 Bohrmann". The Minor Planet Bulletin. 31 (1): 2. Bibcode:2004MPBu...31....2S. ISSN 1052-8091. Retrieved 6 August 2016.
    10. 1 2 Stephens, Robert D.; Warner, Brian D. (March 2004). "Lightcurve analysis of Koronis family asteroid 1635 Bohrmann". The Minor Planet Bulletin. 31 (1): 3–4. Bibcode:2004MPBu...31....3S. ISSN 1052-8091. Retrieved 6 August 2016.
    11. ↑ 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 6 August 2016.
    12. 1 2 "1635 Bohrmann (1924 QW)". Minor Planet Center. Retrieved 6 August 2016.
    13. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 6 August 2016.

    External links

    This article is issued from Wikipedia - version of the 9/23/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.