1684 Iguassú

1684 Iguassú
Discovery [1]
Discovered by M. Itzigsohn
Discovery site La Plata Observatory
Discovery date 23 August 1951
Designations
MPC designation 1684 Iguassú
Named after
 Iguazu Falls[2]
1951 QE · 1934 LN
1935 SK1 · 1939 HK
1949 DE · 1950 JT
1965 AA1 · A922 DA
main-belt · (outer) [3]
Orbital characteristics [1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc 94.08 yr (34362 days)
Aphelion 3.4825 AU (520.97 Gm)
Perihelion 2.7106 AU (405.50 Gm)
3.0966 AU (463.24 Gm)
Eccentricity 0.12463
5.45 yr (1990.3 d)
5.0386°
0° 10m 51.168s / day
Inclination 3.6669°
105.41°
154.12°
Earth MOID 1.69461 AU (253.510 Gm)
Jupiter MOID 1.57401 AU (235.469 Gm)
Jupiter Tisserand parameter 3.208
Physical characteristics
Dimensions 26.53 km
30.62 km (calculated)[3]
Mean radius
 13.265 ± 0.6 km
9.1423±0.0033 h[4]
9.230±0.170 h[5]
9.1423 h (0.38093 d)[1]
0.1202 ± 0.011[1]
0.057 (assumed)[3]
C [3]
10.9[1]

    1684 Iguassú, provisional designation 1951 QE, is a carbonaceous asteroid from the outer region of the asteroid belt, about 27 kilometers in diameter. It was discovered on 23 August 1951 by Argentine astronomer Miguel Itzigsohn at the La Plata Astronomical Observatory, located in the city of La Plata, capital of province of the Buenos Aires.[6]

    The asteroid orbits the Sun at a distance of 2.7–3.5 AU once every 5.45 years (1,990 days). Its orbit shows an eccentricity of 0.12 and is tilted by 4 degrees to the plane of the ecliptic. The Lightcurve Database project assumes the body to be a C-type asteroid with a corresponding low albedo of 0.06, while seven older observations by the Infrared Astronomical Satellite, IRAS, gave a much higher value of 0.12.[3]

    In 2014, two photometric light-curve measurements determined the body's rotation period to be 9.14 and 9.23 hours, respectively, both with a brightness change of 0.15 in magnitude.[4][5]

    It is named after the large, 60-meters high and 1-kilometer wide waterfall, the Iguazu Falls, which river of the same name marks part of the boundary between Argentina and Brazil.[2] As a curiosity, the spelling of the minor planet's name Iguassú neither concurs with the Spanish "Iguazú" nor with the Portuguese "Iguaçu". It is rather similar to "Yguasu", used in the native Guarani language, from which the waterfall's name originates.

    References

    1. 1 2 3 4 5 "JPL Small-Body Database Browser: 1684 Iguassu (1951 QE)" (2015-09-20 last obs.). Jet Propulsion Laboratory. Retrieved 22 April 2016.
    2. 1 2 Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (1684) Iguassú. Springer Berlin Heidelberg. p. 134. ISBN 978-3-540-29925-7. Retrieved November 2015.
    3. 1 2 3 4 5 "LCDB Data for (1684) Iguassu". Asteroid Lightcurve Database (LCDB). Retrieved November 2015.
    4. 1 2 Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David; et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal 150 (3): 35. arXiv:1504.04041. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved November 2015.
    5. 1 2 Chang, Chan-Kao; Ip, Wing-Huen; Lin, Hsing-Wen; Cheng, Yu-Chi; Ngeow, Chow-Choong; Yang, Ting-Chang; et al. (August 2015). "Asteroid Spin-rate Study Using the Intermediate Palomar Transient Factory". The Astrophysical Journal Supplement Series 219 (2): 19. arXiv:1506.08493. Bibcode:2015ApJS..219...27C. doi:10.1088/0067-0049/219/2/27. Retrieved November 2015.
    6. ↑ "1684 Iguassu (1951 QE)". Minor Planet Center. Retrieved November 2015.

    External links


    This article is issued from Wikipedia - version of the Friday, April 22, 2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.