Astronomy:1419 Danzig
Modelled shape of Danzig from its lightcurve | |
Discovery[1] | |
---|---|
Discovered by | K. Reinmuth |
Discovery site | Heidelberg Obs. |
Discovery date | 5 September 1929 |
Designations | |
(1419) Danzig | |
Named after | German name of the Polish city of Gdańsk[2] |
1929 RF · 1936 RD 1952 HJ4 · 1957 WO1 A917 GA | |
Minor planet category | |
Orbital characteristics[3] | |
Epoch 16 February 2017 (JD 2457800.5) | |
Uncertainty parameter 0 | |
Observation arc | 99.90 yr (36,489 days) |
|{{{apsis}}}|helion}} | 2.6285 AU |
|{{{apsis}}}|helion}} | 1.9570 AU |
2.2927 AU | |
Eccentricity | 0.1465 |
Orbital period | 3.47 yr (1,268 days) |
Mean anomaly | 356.63° |
Mean motion | 0° 17m 2.04s / day |
Inclination | 5.7254° |
Longitude of ascending node | 213.53° |
232.65° | |
Physical characteristics | |
Mean diameter | 14.059±0.096 km[7] 14.139 km[8] 14.997±0.382 km[9] 15.09±0.22 km[10] |
Rotation period | |
Pole ecliptic latitude | (22.0°, 76.0°) (λ1/β1)[13] |
Geometric albedo | 0.2324[14][8] 0.2388±0.0462[7] 0.250±0.009[10] 0.260±0.023[9] |
S (family-based)[14] | |
Absolute magnitude (H) | 11.20[9] · 11.3[3][10] · 11.45±0.14[14][8][11] · 11.45[7] · 11.55±1.00[15] |
1419 Danzig (prov. designation: 1929 RF) is a highly elongated Flora asteroid from the inner regions of the asteroid belt. It was discovered on 5 September 1929, by German astronomer Karl Reinmuth at Heidelberg Observatory in southwest Germany.[1] The stony S-type asteroid has a rotation period of 8.1 hours and measures approximately 14 kilometers (8.7 miles) in diameter. It was named for the city of Gdańsk (German: Danzig).[2]
Classification and orbit
When applying the synthetic hierarchical clustering method (HCM) by Nesvorný,[4] Danzig is a member of the Flora family (402), a giant asteroid family and the largest family of stony asteroids in the main-belt.[16]:23 However, according to the 1995 HCM-analysis by Zappalà,[6] and HCM-analysis by Milani and Knežević (AstDys), it is a background asteroid. The latter HCM-analysis does not recognize the Flora asteroid clan.[5]
Danzig 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.[3] 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.[1]
Naming
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]
Physical characteristics
The overall spectral type for Florian asteroid is that of a stony S-type.[16]:23
Rotation period and pole
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±0.1 hours with a brightness variation of 0.92 magnitude ({{{1}}}).[11] In October 2002, another lightcurve obtained by Italian and French amateur astronomers Silvano Casulli and Laurent Bernasconi gave a concurring period of 8.1202±0.0001 hours and an amplitude of 0.81 magnitude ({{{1}}}).[12] 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±0.00005 hours, as well as a spin axis of (22.0°, 76.0°) in ecliptic coordinates (λ, β) ({{{1}}}).[13]
Diameter and albedo
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.[7][9][10] 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.[14][8]
References
- ↑ Jump up to: 1.0 1.1 1.2 1.3 "1419 Danzig (1929 RF)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=1419. Retrieved 5 April 2017.
- ↑ Jump up to: 2.0 2.1 2.2 2.3 Schmadel, Lutz D. (2007). "(1419) Danzig". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 114. doi:10.1007/978-3-540-29925-7_1420. ISBN 978-3-540-00238-3.
- ↑ Jump up to: 3.0 3.1 3.2 3.3 "JPL Small-Body Database Browser: 1419 Danzig (1929 RF)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001419. Retrieved 5 April 2017.
- ↑ Jump up to: 4.0 4.1 "Asteroid 1419 Danzig – Nesvorny HCM Asteroid Families V3.0". Small Bodies Data Ferret. https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1419+Danzig#Asteroid%201419%20DanzigEAR-A-VARGBDET-5-NESVORNYFAM-V3.0. Retrieved 16 March 2020.
- ↑ Jump up to: 5.0 5.1 "Asteroid 1419 Danzig – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=1419.
- ↑ Jump up to: 6.0 6.1 Zappalà, V.; Bendjoya, Ph.; Cellino, A.; Farinella, P.; Froeschle, C. (1997). "Asteroid Dynamical Families". NASA Planetary Data System: EAR-A-5-DDR-FAMILY-V4.1. https://sbnarchive.psi.edu/pds3/non_mission/EAR_A_5_DDR_FAMILY_V4_1/data/family.tab. Retrieved 16 March 2020.} (PDS main page)
- ↑ Jump up to: 7.0 7.1 7.2 7.3 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. doi:10.1088/0004-637X/741/2/90. Bibcode: 2011ApJ...741...90M.
- ↑ Jump up to: 8.0 8.1 8.2 8.3 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. doi:10.1016/j.icarus.2012.07.026. Bibcode: 2012Icar..221..365P.
- ↑ Jump up to: 9.0 9.1 9.2 9.3 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. doi:10.1088/2041-8205/759/1/L8. Bibcode: 2012ApJ...759L...8M.
- ↑ Jump up to: 10.0 10.1 10.2 10.3 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. doi:10.1093/pasj/63.5.1117. Bibcode: 2011PASJ...63.1117U. (online, AcuA catalog p. 153)
- ↑ Jump up to: 11.0 11.1 11.2 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 26: 1511. Bibcode: 1995LPI....26.1511W.
- ↑ Jump up to: 12.0 12.1 Behrend, Raoul. "Asteroids and comets rotation curves – (1419) Danzig". Geneva Observatory. http://obswww.unige.ch/~behrend/page4cou.html#001419. Retrieved 5 April 2017.
- ↑ Jump up to: 13.0 13.1 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. doi:10.1051/0004-6361/201116738. Bibcode: 2011A&A...530A.134H.
- ↑ Jump up to: 14.0 14.1 14.2 14.3 "LCDB Data for (1419) Danzig". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=1419%7CDanzig. Retrieved 5 April 2017.
- ↑ 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. doi:10.1016/j.icarus.2015.08.007. Bibcode: 2015Icar..261...34V.
- ↑ Jump up to: 16.0 16.1 Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). "Identification and Dynamical Properties of Asteroid Families". Asteroids IV. pp. 297–321. doi:10.2458/azu_uapress_9780816532131-ch016. ISBN 9780816532131. Bibcode: 2015aste.book..297N.
External links
- Lightcurve Database Query (LCDB), at www.minorplanet.info
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Geneva Observatory, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 1419 Danzig at AstDyS-2, Asteroids—Dynamic Site
- 1419 Danzig at the JPL Small-Body Database
Original source: https://en.wikipedia.org/wiki/1419 Danzig.
Read more |