1611 Beyer

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1611 Beyer
Discovery [1]
Discovered by K. Reinmuth
Discovery site Heidelberg Obs.
Discovery date 17 February 1950
Designations
MPC designation (1611) Beyer
Named after
Max Beyer (astronomer)[2]
1950 DJ · 1958 RE
main-belt · (outer)[3]
Hygiea[4]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 67.10 yr (24,510 days)
Aphelion 3.6837 AU
Perihelion 2.6637 AU
3.1737 AU
Eccentricity 0.1607
5.65 yr (2,065 days)
150.69°
0° 10m 27.48s / day
Inclination 4.2818°
237.54°
75.717°
Physical characteristics
Mean diameter
15.46±4.34 km[5]
23.25±1.77 km[6]
24.30 km (calculated)[3]
24.444±0.192 km[7]
13.2608±0.0113 h[8]
13.29 h[9]
0.057 (assumed)[3]
0.062±0.014[7]
0.10±0.08[5]
0.101±0.017[6]
C (assumed)[3]
11.30[6] · 11.538±0.001 (R)[8] · 11.70[7] · 11.8[1][3] · 11.93±0.21[10] · 12.08[5]

1611 Beyer, provisional designation 1950 DJ, is a carbonaceous Hygiean asteroid from the outer region of the asteroid belt, approximately 20 kilometers in diameter. It was discovered on 17 February 1950, by German astronomer Karl Reinmuth at Heidelberg Observatory in southern Germany.[11] It was named after astronomer Max Beyer.[2]

Classification and orbit[edit]

Beyer is a member of the Hygiea family (601),[4] a very large family of carbonaceous outer-belt asteroids, named after the fourth-largest asteroid, 10 Hygiea.[12] It orbits the Sun in the outer main-belt at a distance of 2.7–3.7 AU once every 5 years and 8 months (2,065 days). Its orbit has an eccentricity of 0.16 and an inclination of 4° with respect to the ecliptic.[1] Its observation arc begins with its official discovery observation, as no precoveries were taken, and no prior identifications were made.[11]

Physical characteristics[edit]

Beyer is a carbonaceous C-type asteroid.[3]

Rotation period[edit]

Astronomers Pierre Antonini and Silvano Casulli obtained a rotational light-curve of Beyer from photometric observations taken in July 2009. It gave a rotation period of 13.29 hours with a brightness variation of 0.35 magnitude (U=2+).[9] In October 2010, observations in the R-band at the Palomar Transient Factory gave a similar period of 13.2608 hours and an amplitude of 0.12 magnitude (U=2).[8]

Diameter and albedo[edit]

According to the surveys carried out by the Japanese Akari satellite and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Beyer measures between 15.46 and 24.44 kilometers in diameter, and its surface has an albedo between 0.062 and 0.101.[5][6][7] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 24.30 kilometers with an absolute magnitude of 11.8.[3]

Naming[edit]

This minor planet was named by the discoverer for Max Beyer (1894–1982), German astronomer at the Bergedorf Observatory in Hamburg.[2] Beyer was also on the post-war editorial board of the Astronomische Gesellschaft. The official naming citation was published by the Minor Planet Center before November 1977 (M.P.C. 1948).[13]

References[edit]

  1. ^ a b c d "JPL Small-Body Database Browser: 1611 Beyer (1950 DJ)" (2017-03-27 last obs.). Jet Propulsion Laboratory. Retrieved 5 June 2017. 
  2. ^ a b c Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (1611) Beyer. Springer Berlin Heidelberg. p. 128. ISBN 978-3-540-00238-3. Retrieved 28 December 2016. 
  3. ^ a b c d e f g "LCDB Data for (1611) Beyer". Asteroid Lightcurve Database (LCDB). Retrieved 28 December 2016. 
  4. ^ a b "Small Bodies Data Ferret". Nesvorny HCM Asteroid Families V3.0. Retrieved 28 February 2018. 
  5. ^ a b c d Nugent, C. R.; Mainzer, A.; Bauer, J.; Cutri, R. M.; Kramer, E. A.; Grav, T.; et al. (September 2016). "NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos". The Astronomical Journal. 152 (3): 12. arXiv:1606.08923Freely accessible. Bibcode:2016AJ....152...63N. doi:10.3847/0004-6256/152/3/63. Retrieved 28 December 2016. 
  6. ^ a b c d 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 28 December 2016. 
  7. ^ a b c d 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 28 December 2016. 
  8. ^ a b c 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:1504.04041Freely accessible. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 28 December 2016. 
  9. ^ a b Behrend, Raoul. "Asteroids and comets rotation curves – (1611) Beyer". Geneva Observatory. Retrieved 28 December 2016. 
  10. ^ 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 28 December 2016. 
  11. ^ a b "1611 Beyer (1950 DJ)". Minor Planet Center. Retrieved 28 December 2016. 
  12. ^ Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). "Identification and Dynamical Properties of Asteroid Families" (PDF). Asteroids IV: 297–321. arXiv:1502.01628Freely accessible. Bibcode:2015aste.book..297N. doi:10.2458/azu_uapress_9780816532131-ch016. Retrieved 28 February 2018. 
  13. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 28 December 2016. 

External links[edit]