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1665 Gaby

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Discovered by
  
K. Reinmuth

MPC designation
  
1665 Gaby

Discovered
  
27 February 1930

Spectral type
  
S-type asteroid

Asteroid group
  
Asteroid belt

Discovery date
  
27 February 1930

Minor planet category
  
main-belt · (inner)

Orbits
  
Sun

Discoverer
  
Karl Wilhelm Reinmuth

Named after
  
Gaby Reinmuth (daughter-in-law of) Karl Reinmuth

Alternative names
  
1930 DQ · 1941 BC 1949 HS · 1951 WQ 1957 KF

Discovery site
  
Landessternwarte Heidelberg-Königstuhl

Similar
  
1862 Apollo, Sun, 1419 Danzig, 1056 Azalea, 1111 Reinmuthia

1665 Gaby, provisional designation 1930 DQ, is a stony asteroid and a relatively slow rotator from the inner regions of the asteroid belt, approximately 11 kilometers in diameter. It was discovered on 27 February 1930, by German astronomer Karl Reinmuth at Heidelberg Observatory in southern Germany.

The S-type asteroid orbits the Sun at a distance of 1.9–2.9 AU once every 3 years and 9 months (1,370 days). Its orbit has an eccentricity of 0.21 and an inclination of 11° with respect to the ecliptic. No precoveries were taken, and no prior identifications were made of Gaby. The body's observation arc begins 2 months after its official discovery observation at Heidelberg.

In February 2005, French amateur astronomer Laurent Bernasconi obtained a rotational light-curve of Gaby from photometric observations. It gave a rotation period of 66 hours with a brightness variation of 0.27 magnitude (U=2). This is a longer-than average rotation, since most minor planets have a period between 2 and 20 hours (see list). In 2016, concurring sidereal periods of 67.905 and 67.911 hours were obtained from modeled photometric observations derived from the Lowell Photometric Database and other sources (U=n.a.).

According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Gaby measures between 10.75 and 11.01 kilometers in diameter, and its surface has an albedo between 0.253 and 0.278. The Collaborative Asteroid Lightcurve Link adopts Petr Pravec's revised WISE data with an albedo of 0.2532 and a diameter of 11.01 kilometers using an absolute magnitude of 7001119000000000000♠11.9±0.2.

This minor planet was named by the discoverer for his daughter-in-law, Gaby Reinmuth. Naming citation was published before November 1977 (M.P.C. 2901).

References

1665 Gaby Wikipedia