2590 Mourão

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2590 Mourão
Discovery [1]
Discovered by H. Debehogne
Discovery site La Silla Obs.
Discovery date 22 May 1980
MPC designation (2590) Mourao
Named after
Ronaldo Mourão
(Brazilian astronomer)[2]
1980 KJ · 1949 WP
1963 SM · 1974 UN
1974 VG2 · 1974 XK
main-belt · Flora[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 66.77 yr (24,389 days)
Aphelion 2.6202 AU
Perihelion 2.0649 AU
2.3426 AU
Eccentricity 0.1185
3.59 yr (1,310 days)
0° 16m 29.64s / day
Inclination 6.1359°
Physical characteristics
Dimensions 6.96 km (calculated)[3]
7.880±1.058 km[4]
15.59±0.01 h[5]
35.52±0.05 h[6]
0.40 (assumed)[3]
11.68[4] · 12.4[1][3] · 12.80±0.25[7]

2590 Mourão, provisional designation 1980 kJ, is a bright Florian asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter.

The asteroid was discovered on 22 May 1980, by Belgian astronomer Henri Debehogne at ESO's La Silla Observatory in northern Chile.[8] It was named after Brazilian astronomer Ronaldo Rogério de Freitas Mourão.[2]

Orbit and classification[edit]

Mourão is a member of the Flora family, one of the largest groups of asteroids in the main-belt.[3] It orbits the Sun in the inner main-belt at a distance of 2.1–2.6 AU once every 3 years and 7 months (1,310 days). Its orbit has an eccentricity of 0.12 and an inclination of 6° with respect to the ecliptic.[1]

Physical characteristics[edit]

Mourão has been characterized as a bright V-type asteroid.[3] V-type asteroids are less common than the abundant S-type asteroids but similar in composition, except for their higher concentration of pyroxenes, an aluminium-rich silicate mineral.


According to the survey carried out by the WISE and subsequent NEOWISE mission, the body's albedo amounts to 0.61,[4] while the Collaborative Asteroid Lightcurve Link assumes a somewhat less extraordinary value of 0.4.[3]


Photometric observations of this asteroid by Slovak astronomer Adrián Galád in September 2006, gave a rotational lightcurve with a rotation period of 15.59±0.01 hours and a brightness variation of 0.49 magnitude (U=3).[5] A second, less secure lightcurve was obtained by Italian astronomers Roberto Crippa and Federico Manzini in September 2013, which gave a divergent period of 35.52 hours with an amplitude of 0.46 magnitude (U=2).[6]


This minor planet was named in honor of Brazilian astronomer Ronaldo Rogério de Freitas Mourão (1935–2014) at the National Observatory of Brazil, in Rio de Janeiro. His activities included the study of double stars, minor planets and comets. He participated extensively in ESO's discoverer program of observations of minor planets. Mourão also wrote several astronomical books and was the founder of the Brazilian Museum for Astronomy (Portuguese: Museu de Astronomia e Ciências Afins).[2] The official naming citation was published by the Minor Planet Center on 2 July 1985 (M.P.C. 9767).[9]


  1. ^ a b c d "JPL Small-Body Database Browser: 2590 Mourao (1980 KJ)" (2016-08-27 last obs.). Jet Propulsion Laboratory. Retrieved 14 June 2017. 
  2. ^ a b c Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (2590) Mourão. Springer Berlin Heidelberg. p. 211. ISBN 978-3-540-00238-3. Retrieved 6 December 2016. 
  3. ^ a b c d e f g h "LCDB Data for (2590) Mourão". Asteroid Lightcurve Database (LCDB). Retrieved 6 December 2016. 
  4. ^ 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 6 December 2016. 
  5. ^ a b Galád, Adrián; Pravec, Petr; Gajdos, Stefan; Kornos, Leonard; Világi, Jozef (October 2007). "Seven Asteroids Studied from Modra Observatory in the Course of Binary Asteroid Photometric Campaign". Earth. 101 (1-2): 17–25. Bibcode:2007EM&P..101...17G. doi:10.1007/s11038-007-9146-6. Retrieved 6 December 2016. 
  6. ^ a b Behrend, Raoul. "Asteroids and comets rotation curves – (2590) Mourão". Geneva Observatory. Retrieved 6 December 2016. 
  7. ^ 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 6 December 2016. 
  8. ^ "2590 Mourao (1980 KJ)". Minor Planet Center. Retrieved 6 December 2016. 
  9. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 6 December 2016. 

External links[edit]