1419 Danzig

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1419 Danzig
1419Danzig (Lightcurve Inversion).png
Lightcurve-based 3D-model of Danzig
Discovery [1]
Discovered by K. Reinmuth
Discovery site Heidelberg Obs.
Discovery date 5 September 1929
Designations
MPC designation (1419) Danzig
Named after
Gdańsk
(German: Danzig)[2]
1929 RF · 1936 RD
1952 HJ4 · 1957 WO1
A917 GA
main-belt · Flora[3]
Orbital characteristics[1]
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 0
Observation arc 99.90 yr (36,489 days)
Aphelion 2.6285 AU
Perihelion 1.9570 AU
2.2927 AU
Eccentricity 0.1465
3.47 yr (1,268 days)
356.63°
0° 17m 2.04s / day
Inclination 5.7254°
213.53°
232.65°
Physical characteristics
Dimensions 14.059±0.096 km[4]
14.139 km[5]
14.14 km (taken)[3]
14.997±0.382 km[6]
15.09±0.22 km[7]
8.0±0.1 h[8]
8.11957±0.00005 h[9]
8.1202±0.0001 h[10]
0.2324[3][5]
0.2388±0.0462[4]
0.250±0.009[7]
0.260±0.023[6]
S[3]
11.20[6] · 11.3[1][7] · 11.45±0.14[3][5][8] · 11.45[4] · 11.55±1.00[11]

1419 Danzig, provisional designation 1929 RF, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 14 kilometers in diameter. It was discovered on 5 September 1929, by German astronomer Karl Reinmuth at Heidelberg Observatory in southwest Germany.[12] The asteroid was named for the city of Gdańsk (German: Danzig).[2]

Classification and orbit[edit]

Danzig is a S-type asteroid and member of the Flora family, one of the largest groups of stony asteroids in the main-belt. It orbits the Sun at a distance of 2.0–2.6 AU once every 3 years and 6 months (1,268 days). Its orbit has an eccentricity of 0.15 and an inclination of 6° with respect to the ecliptic.[1] In 1917, it was first observed as A917 GA at Simeiz Observatory (and Heidelberg on the following night), extending the body's observation arc by 12 years prior to its official discovery observation at Heidelberg.[12]

Physical characteristics[edit]

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, Danzig measures 14.059 and 15.09 kilometers in diameter and its surface has an albedo between 0.238 and 0.260.[4][6][7] The Collaborative Asteroid Lightcurve Link adopts Petr Pravec's revised WISE-data, that is, an albedo of 0.2324 and a diameter of 14.139 kilometers with an absolute magnitude of 11.45.[3][5]

Rotation period and pole[edit]

In November 1988, Polish astronomer Wiesław Wiśniewski obtained a rotational lightcurve of Danzig from photometric observations. It gave a well-defined rotation period of 8.0 hours with a brightness variation of 0.92 magnitude (U=3).[8]

In October 2002, another lightcurve obtained by Italian/French amateur astronomers Silvano Casulli and Laurent Bernasconi gave a concurring period of 8.1202 hours and an amplitude of 0.81 magnitude (U=3).[10] While Danzig has an average rotation period, it has a high brightness variation, which indicates that the body has a non-spheroidal shape.

In 2011, a modeled lightcurve using data from the Uppsala Asteroid Photometric Catalogue (UAPC) and other sources gave a period 8.11957 hours, as well as a spin axis of (22.0°, 76.0°) in ecliptic coordinates (λ, β) (U=n.a.).[9]

Naming[edit]

This minor planet was named after the now Polish city and port on the Baltic sea, Gdańsk (German: Danzig). The city was also honored by another minor planet, 764 Gedania.[2] Naming citation was first mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 128)[2]

References[edit]

  1. ^ a b c d "JPL Small-Body Database Browser: 1419 Danzig (1929 RF)" (2017-03-08 last obs.). Jet Propulsion Laboratory. Retrieved 5 April 2017. 
  2. ^ a b c d Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (1419) Danzig. Springer Berlin Heidelberg. p. 114. ISBN 978-3-540-00238-3. Retrieved 5 April 2017. 
  3. ^ a b c d e f "LCDB Data for (1419) Danzig". Asteroid Lightcurve Database (LCDB). Retrieved 5 April 2017. 
  4. ^ a b c d 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 5 April 2017. 
  5. ^ a b c d Pravec, Petr; Harris, Alan W.; Kusnirák, Peter; Galád, Adrián; Hornoch, Kamil (September 2012). "Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations". Icarus. 221 (1): 365–387. Bibcode:2012Icar..221..365P. doi:10.1016/j.icarus.2012.07.026. Retrieved 5 April 2017. 
  6. ^ 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 5 April 2017. 
  7. ^ 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 5 April 2017. 
  8. ^ a b c Wisniewski, W. Z.; Michalowski, T. M.; Harris, A. W.; McMillan, R. S. (March 1995). "Photoelectric Observations of 125 Asteroids". Abstracts of the Lunar and Planetary Science Conference. Bibcode:1995LPI....26.1511W. Retrieved 5 April 2017. 
  9. ^ a b 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 & Astrophysics. 530: 16. arXiv:1104.4114Freely accessible. Bibcode:2011A&A...530A.134H. doi:10.1051/0004-6361/201116738. Retrieved 5 April 2017. 
  10. ^ a b Behrend, Raoul. "Asteroids and comets rotation curves – (1419) Danzig". Geneva Observatory. Retrieved 5 April 2017. 
  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 5 April 2017. 
  12. ^ a b "1419 Danzig (1929 RF)". Minor Planet Center. Retrieved 5 April 2017. 

External links[edit]