17198 Gorjup

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17198 Gorjup
Discovery [1]
Discovered by LINEAR
Discovery site Lincoln Lab's ETS
Discovery date 3 January 2000
MPC designation (17198) Gorjup
Named after
Niko Gorjup
(2003 ISEF awardee)[2]
2000 AA31 · 1990 EH6
1998 QU102
main-belt · Flora [3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 26.90 yr (9,825 days)
Aphelion 2.5125 AU
Perihelion 2.0465 AU
2.2795 AU
Eccentricity 0.1022
3.44 yr (1,257 days)
0° 17m 11.04s / day
Inclination 3.2856°
Physical characteristics
Dimensions 2.71 km (calculated)[3]
3.2430±0.0005 h[4]
0.24 (assumed)[3]

17198 Gorjup, provisional designation 2000 AA31, is a stony Flora asteroid and asteroid pair from the inner regions of the asteroid belt, approximately 2.7 kilometers in diameter. It was discovered on 3 January 2000, by the Lincoln Near-Earth Asteroid Research team at the Lincoln Laboratory Experimental Test Site in Socorro, New Mexico, United States.[5] The asteroid was named for Slovenian Niko Gorjup, a 2003 awardee of the ISEF contest.[2]

Orbit and classification[edit]

Gorjup is a member of the Flora family, one of the largest families of stony asteroids. It orbits the Sun in the inner main-belt at a distance of 2.0–2.5 AU once every 3 years and 5 months (1,257 days). Its orbit has an eccentricity of 0.10 and an inclination of 3° with respect to the ecliptic.[1]

The asteroid was first identified as 1990 EH6 at ESO's La Silla Observatory in March 1990, extending the body's observation arc by almost 10 years prior to its official discovery observation at Socorro.[5]

Physical characteristics[edit]

Diameter estimate[edit]

The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – derived from 8 Flora the family's largest member and namesake – and calculates a diameter of 2.71 kilometers with an absolute magnitude of 15.0.[3]

Asteroid pair[edit]

Gorjup is a paired asteroid with (229056) 2004 FC126.[4]:9 It is thought that asteroid pairs are formed by a single parent body, that broke up into a proto-binary system due to its rotation. Soon after, such systems disrupt under their own internal dynamics into pairs.[4]


A rotational lightcurve of Gorjup was obtained from photometric observations made by Czech astronomer Petr Pravec at Ondřejov Observatory in August 2008. The lightcurve gave a well-defined rotation period of 3.2430 hours with a brightness variation of 0.12 magnitude (U=3).[4]:54


This minor planet was named after Slovenian Niko Gorjup (born 1984) an awardee in the Intel International Science and Engineering Fair (ISEF) in 2003. At the time, he attended the Solski Center Nova Gorica, Gimnazija, Nova Gorica, Slovenia.[2] The approved naming citation was published by the Minor Planet Center on 14 June 2004 (M.P.C. 52173).[6]


  1. ^ a b c d "JPL Small-Body Database Browser: 17198 Gorjup (2000 AA31)" (2017-01-24 last obs.). Jet Propulsion Laboratory. Retrieved 26 June 2017. 
  2. ^ a b c Schmadel, Lutz D. (2006). Dictionary of Minor Planet Names – (17198) Gorjup, Addendum to Fifth Edition: 2003–2005. Springer Berlin Heidelberg. p. 108. ISBN 978-3-540-34360-8. Retrieved 25 January 2016. 
  3. ^ a b c d e f "LCDB Data for (17198) Gorjup". Asteroid Lightcurve Database (LCDB). Retrieved 17 May 2016. 
  4. ^ a b c d Pravec, P.; Vokrouhlický, D.; Polishook, D.; Scheeres, D. J.; Harris, A. W.; Galád, A.; et al. (August 2010). "Formation of asteroid pairs by rotational fission". Nature. 466 (7310): 1085–1088.(NatureHomepage). arXiv:1009.2770Freely accessible. Bibcode:2010Natur.466.1085P. doi:10.1038/nature09315. PMID 20740010. Retrieved 25 January 2016. 
  5. ^ a b "17198 Gorjup (2000 AA31)". Minor Planet Center. Retrieved 25 January 2016. 
  6. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 17 May 2016. 

External links[edit]