1019 Strackea

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1019 Strackea
Discovery [1]
Discovered by K. Reinmuth
Discovery site Heidelberg Obs.
Discovery date 3 March 1924
MPC designation (1019) Strackea
Named after
Gustav Stracke[2]
(German astronomer)
1924 QN
main-belt[1] · (inner)
Hungaria[3][4] · background [5]
Orbital characteristics[1]
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 0
Observation arc 92.08 yr (33,632 days)
Aphelion 2.0477 AU
Perihelion 1.7756 AU
1.9117 AU
Eccentricity 0.0712
2.64 yr (965 days)
0° 22m 22.44s / day
Inclination 26.977°
Physical characteristics
Dimensions 7.169±0.263 km[6]
7.44±1.36 km[7]
8.37±0.7 km (IRAS:3)[8]
8.79±0.23 km[9]
3.832 h (incorrect)[10]
4.044±0.002 h[11]
4.04659±0.00006 h[12]
4.047±0.001 h[13]
4.047±0.005 h[14]
4.05±0.01 h[12]
4.052±0.002 h[15]
0.2236±0.040 (IRAS:3)[8]
Tholen = S[1][3]
B–V = 0.953[1]
U–B = 0.513[1]

1019 Strackea, provisional designation 1924 QN, is a stony Hungaria asteroid of the inner asteroid belt, approximately 8 kilometers in diameter. It was discovered on 3 March 1924, by astronomer Karl Reinmuth at Heidelberg Observatory in southwest Germany.[16] It is named for German astronomer Gustav Stracke.[2]

Classification and orbit[edit]

Strackea is a member of the Hungaria group, a dynamical group forming the innermost dense concentration of asteroids in the Solar System.[4] It is, however, a non-family asteroid of the background population, and not a member of the (collisional) Hungaria family.[5] It orbits the Sun at a distance of 1.8–2.0 AU once every 2 years and 8 months (965 days). Its orbit has an eccentricity of 0.07 and an inclination of 27° with respect to the ecliptic.[1] The body's observation arc begins with its official discovery observation at Heidelberg in 1924.[16]

Physical characteristics[edit]

In the Tholen classification, Strackea is a common, stony S-type asteroid.[1][3]


The first valid rotational lightcurve of Strackea with a period of 4.05 hours and a brightness variation of 0.17 magnitude was obtained by French amateur astronomer Laurent Bernasconi in February 2006 (U=2).[12] Since then, several well-defined lightcurves with a period between 4.044 and 4.052 hours and an amplitude of 0.15 to 0.25 magnitude were obtained by astronomers Brian Warner,[a] Richard Schmidt, as well as by the group of astronomers Pierre Antonini, Raoul Behrend, Roberto Crippa and Federico Manzini (U=3/3-/3-/3/3).[11][12][13][14][15]

Diameter and albedo[edit]

According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Strackea measures between 7.169 and 8.79 kilometers in diameter and its surface has an albedo between 0.206 and 0.39.[6][7][8][9] The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.2236 and a diameter of 8.37 kilometers with an absolute magnitude of 12.63.[3]


This minor planet was named after German astronomer Gustav Stracke (1887–1943), who was in charge of the minor planet department at the Berlin-based Astronomical Calculation Institute, despite his wish that he not be honored in this fashion.[2] Previously, the discoverer had circumvented Stracke's wish by accordingly naming a consecutively numbered sequence of asteroids, so that their first letters form the name "G. Stracke". These minor planets, in the number range from 1227 to 1234, were:[17]

Naming citation was first published by Paul Herget in The Names of the Minor Planets in 1955 (H 97).[2]


  1. ^ Lightcurve plot of (1019) Strackea, Warner (2014) Palmer Divide Station. Summary figures at Center for Solar System Studies


  1. ^ a b c d e f g h i "JPL Small-Body Database Browser: 1019 Strackea (1924 QN)" (2016-04-02 last obs.). Jet Propulsion Laboratory. Retrieved 13 February 2017. 
  2. ^ a b c d Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (1019) Strackea. Springer Berlin Heidelberg. p. 88. ISBN 978-3-540-00238-3. Retrieved 13 February 2017. 
  3. ^ a b c d e "LCDB Data for (1019) Strackea". Asteroid Lightcurve Database (LCDB). Retrieved 13 February 2017. 
  4. ^ a b Spratt, Christopher E. (April 1990). "The Hungaria group of minor planets". Journal of the Royal Astronomical Society of Canada: 123–131. Bibcode:1990JRASC..84..123S. ISSN 0035-872X. Retrieved 13 February 2017. 
  5. ^ a b "Small Bodies Data Ferret". Nesvorny HCM Asteroid Families V3.0. Retrieved 24 October 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 13 February 2017. 
  7. ^ a b c d Nugent, C. R.; Mainzer, A.; Masiero, J.; Bauer, J.; Cutri, R. M.; Grav, T.; et al. (December 2015). "NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos". The Astrophysical Journal. 814 (2): 13. arXiv:1509.02522Freely accessible. Bibcode:2015ApJ...814..117N. doi:10.1088/0004-637X/814/2/117. Retrieved 13 February 2017. 
  8. ^ a b c d Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. Bibcode:2004PDSS...12.....T. Retrieved 13 February 2017. 
  9. ^ 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 13 February 2017. 
  10. ^ Ivanova, V. G.; Apostolovska, G.; Borisov, G. B.; Bilkina, B. I. (November 2002). "Results from photometric studies of asteroids at Rozhen National Observatory, Bulgaria". In: Proceedings of Asteroids: 505–508. Bibcode:2002ESASP.500..505I. Retrieved 13 February 2017. 
  11. ^ a b Warner, Brian D. (October 2009). "Asteroid Lightcurve Analysis at the Palmer Divide Observatory: 2009 March-June". The Minor Planet Bulletin. 36 (4): 172–176. Bibcode:2009MPBu...36..172W. ISSN 1052-8091. Retrieved 13 February 2017. 
  12. ^ a b c d Behrend, Raoul. "Asteroids and comets rotation curves – (1019) Strackea". Geneva Observatory. Retrieved 13 February 2017. 
  13. ^ a b Schmidt, Richard E. (January 2015). "NIR Minor Planet Photometry from Burleith Observatory: 2014 February - June". The Minor Planet Bulletin. 42 (1): 1–3. Bibcode:2015MPBu...42....1S. ISSN 1052-8091. Retrieved 13 February 2017. 
  14. ^ a b Warner, Brian D. (July 2011). "Asteroid Lightcurve Analysis at the Palmer Divide Observatory: 2010 December- 2011 March". The Minor Planet Bulletin. 38 (3): 142–149. Bibcode:2011MPBu...38..142W. ISSN 1052-8091. Retrieved 13 February 2017. 
  15. ^ a b Warner, Brian D. (July 2014). "Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2014 January-March". The Minor Planet Bulletin. 41 (3): 144–155. Bibcode:2014MPBu...41..144W. ISSN 1052-8091. Retrieved 13 February 2017. 
  16. ^ a b "1019 Strackea (1924 QN)". Minor Planet Center. Retrieved 13 February 2017. 
  17. ^ Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (1234) Elyna. Springer Berlin Heidelberg. pp. 102–103. ISBN 978-3-540-00238-3. Retrieved 13 February 2017. 

External links[edit]