1124 Stroobantia

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1124 Stroobantia
Discovery [1]
Discovered byE. Delporte
Discovery siteUccle Obs.
Discovery date6 October 1928
MPC designation(1124) Stroobantia
Named after
Paul Stroobant
(Belgian astronomer)[2]
1928 TB · 1926 FC
1930 BK · 1951 DJ
main-belt · (outer)[3]
Orbital characteristics[1]
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 0
Observation arc86.39 yr (31,554 days)
Aphelion3.0157 AU
Perihelion2.8384 AU
2.9271 AU
5.01 yr (1,829 days)
0° 11m 48.48s / day
Physical characteristics
Dimensions24.450±0.140 km[4]
24.65±1.1 km (IRAS:9)[5]
25.823±0.121 km[6]
27.03±0.70 km[7]
29.68±0.57 km[8]
16.39 h[9]
17.0±0.2 h[10]
0.1569±0.015 (IRAS:9)[5]
B–V = 0.702[1]
U–B = 0.223[1]
Tholen = X[1]
M[11] · X[3][12]
10.67[1][3][5][6][7][8] · 10.67±0.22[12]

1124 Stroobantia, provisional designation 1928 TB, is a metallic asteroid from the outer region of the asteroid belt, approximately 25 kilometers in diameter. It was discovered on 6 October 1928, by Belgian astronomer Eugène Delporte at Uccle Observatory in Belgium.[13] It is named for astronomer Paul Stroobant.[2]


Stroobantia orbits the Sun at a distance of 2.8–3.0 AU once every 5.01 years (1,829 days). Its orbit has an eccentricity of 0.03 and an inclination of 8° with respect to the ecliptic.[1] First identified as 1926 FC at Heidelberg in 1926, the asteroid's observation arc begins at Algiers Observatory in 1931, or three years after its official discovery observation at Uccle.[13]

Physical characteristics[edit]

In the Tholen taxonomy, Stroobantia is classified as a generic X-type asteroid. It was grouped it into the metallic subcategory of M-type asteroid by a spectroscopic survey of X-type asteroids using the TNG, NTT and IRTF telescopes.[1][11]

Rotation period[edit]

Two fragmentary rotational lightcurves of Stroobantia were obtained from photometric observations by Ricardo Gil-Hutton at the Félix Aguilar Observatory in Argentina, and by French amateur astronomers Laurent Bernasconi. Lightcuve analysis gave a rotation period of 16.39 and 17.0 hours with a brightness amplitude of 0.15 and 0.06 magnitude, respectively (U=1/1).[9][10]

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, Stroobantia measures between 24.45 and 29.68 kilometers in diameter, and its surface has an albedo between 0.108 and 0.1569.[4][5][6][7][8] The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.1569 and a diameter of 24.65 kilometers with an absolute magnitude of 10.67.[3]


This minor planet was named for Paul Stroobant (1868–1936), Belgian astronomer and director of the Uccle Observatory, where this asteroid was discovered. Stroobant''s research included the number, mass and distribution of the minor planets. Naming citation was first mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 105).[2]


  1. ^ a b c d e f g h "JPL Small-Body Database Browser: 1124 Stroobantia (1928 TB)" (2016-06-08 last obs.). Jet Propulsion Laboratory. Retrieved 14 March 2017.
  2. ^ a b c Schmadel, Lutz D. (2007). "(1124) Stroobantia". Dictionary of Minor Planet Names – (1124) Stroobantia. Springer Berlin Heidelberg. p. 95. doi:10.1007/978-3-540-29925-7_1125. ISBN 978-3-540-00238-3.
  3. ^ a b c d "LCDB Data for (1124) Stroobantia". Asteroid Lightcurve Database (LCDB). Retrieved 14 March 2017.
  4. ^ a b Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R.; et al. (August 2014). "Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos". The Astrophysical Journal. 791 (2): 11. arXiv:1406.6645. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. Retrieved 14 March 2017.
  5. ^ 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. 12: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T. Retrieved 14 March 2017.
  6. ^ 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". The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90.
  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 14 March 2017.
  8. ^ 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:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 14 March 2017.
  9. ^ a b Gil-Hutton, Ricardo (April 1998). "Photometry of Asteroids 558 Carmen, 613 Ginevra, and 1124 Stroobantia". Revista Mexicana de Astronomia y Astrofisica. 34: 9(RMxAAHomepage). Bibcode:1998RMxAA..34....9G. Retrieved 14 March 2017.
  10. ^ a b Behrend, Raoul. "Asteroids and comets rotation curves – (1124) Stroobantia". Geneva Observatory. Retrieved 14 March 2017.
  11. ^ a b Fornasier, S.; Clark, B. E.; Dotto, E. (July 2011). "Spectroscopic survey of X-type asteroids". Icarus. 214 (1): 131–146. arXiv:1105.3380. Bibcode:2011Icar..214..131F. doi:10.1016/j.icarus.2011.04.022. Retrieved 14 March 2017.
  12. ^ a b 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:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 14 March 2017.
  13. ^ a b "1124 Stroobantia (1928 TB)". Minor Planet Center. Retrieved 14 March 2017.

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