1627 Ivar

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1627 Ivar
1627Ivar (Lightcurve Inversion).png
A three-dimensional model of 1627 Ivar based on its light curve.
Discovery
Discovered by Ejnar Hertzsprung
Discovery date September 25, 1929
Designations
1929 SH; 1957 NA; 1957 XA
Minor planet category Amor, Mars crosser
Orbital characteristics
Epoch November 26, 2005 (JD 2453700.5 )
Aphelion 389.340 Gm (2.603 AU)
Perihelion 168.152 Gm, (1.124 AU)
278.746 Gm
(1.863 AU)
Eccentricity 0.397
929.016 d,
(2.544 a)
20.934 km/s
2.701°
Inclination 8.447 °
133.203°
167.604°
Physical characteristics
Dimensions 9.1 km
4.80 h
Albedo .140
Spectral type
S
13.2

1627 Ivar is a large near-Earth asteroid and Mars-crosser asteroid that was discovered in 1929 by Ejnar Hertzsprung at the Union Observatory in Johannesburg, South Africa. Although it does not cross Earth's orbit, during 1900-2100 it comes closer to the Earth with its 2074 pass at 21.1 Gm (0.141 AU) than it does to Mars (22.5 Gm or 0.150 AU in 1975).

In 1985, this object was detected with radar from the Arecibo Observatory at a distance of 0.20 AU. The measured radar cross-section was 7.5 km2.[1]

References[edit]

  1. ^ Ostro, S. J. et al. (October 1991), Asteroid radar astrometry, Astronomical Journal 102: 1490–1502, Bibcode:1991AJ....102.1490O, doi:10.1086/115975. 

External links[edit]