1665 Gaby

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1665 Gaby
001665-asteroid shape model (1665) Gaby.png
Shape model of Gaby from its lightcurve
Discovery [1]
Discovered by K. Reinmuth
Discovery site Heidelberg Obs.
Discovery date27 February 1930
Designations
(1665) Gaby
Named after
Gaby Reinmuth
(daughter-in-law of)
Karl Reinmuth [2]
1930 DQ ·1941 BC
1949 HS ·1951 WQ
1957 KF
main-belt  ·(inner) [3]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 87.04 yr (31,793 days)
Aphelion 2.9145 AU
Perihelion 1.9128 AU
2.4136 AU
Eccentricity 0.2075
3.75 yr (1,370 days)
165.86°
0° 15m 46.08s / day
Inclination 10.835°
91.543°
5.9166°
Physical characteristics
Dimensions10.746±0.179 km [4]
10.960±0.021 km [5]
11.009 km [6]
11.01 km (taken) [3]
66±2 h [7]
67.905±0.005 h [8]
67.911±0.005 h [9]
0.2532 [6]
0.2681±0.0736 [5]
0.278±0.049 [4]
Tholen = S [1]  · S [3] [10]
B–V = 0.848 [1]
U–B = 0.481 [1]
11.85 [1] [5]  ·11.9±0.2 [3] [6] [11]  ·12.19±0.97 [10]

    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. [12] It was later named after Gaby Reinmuth, the discoverer's daughter-in-law. [2]

    Contents

    Orbit and classification

    Gaby 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. [1] 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. [12]

    Physical characteristics

    In the Tholen classification, Gaby is a common S-type asteroid. [1]

    Lightcurves

    In February 2005, French amateur astronomer Laurent Bernasconi obtained a rotational lightcurve of Gaby from photometric observations. It gave a rotation period of 66 hours with a brightness variation of 0.27 magnitude ( U=2 ). [7]

    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. ). [8] [9]

    Diameter and albedo

    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. [4] [5] [6] 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 11.9±0.2. [3] [6]

    Naming

    This minor planet was named by the discoverer for his daughter-in-law, Gaby Reinmuth. [2] The official naming citation was published by the Minor Planet Center on 15 December 1968 ( M.P.C. 2901). [13]

    Related Research Articles

    997 Priska, provisional designation 1923 NR, is a carbonaceous Adeonian asteroid from the central regions of the asteroid belt, approximately 19 kilometers in diameter. It was discovered on 12 July 1923, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany. The asteroid's name is a common German female name, unrelated to the discoverer's contemporaries.

    1018 Arnolda, provisional designation 1924 QM, is a stony asteroid from the central regions of the asteroid belt, approximately 16 kilometers in diameter. It was discovered on 3 March 1924, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany. The asteroid was named after physicist Arnold Berliner.

    <span class="mw-page-title-main">1050 Meta</span> Stony, main-belt asteroid of the Eunomia family

    1050 Meta, provisional designation 1925 RC, is a stony Eunomia asteroid from the central regions of the asteroid belt, approximately 10 kilometers in diameter. It was discovered on 14 September 1925, by German astronomer Karl Reinmuth at the Heidelberg Observatory in southwest Germany. The meaning of the asteroids's name is unknown. The presumably S-type asteroid has a rotation period of 6.14 hours and possibly an elongated shape.

    1070 Tunica, provisional designation 1926 RB, is a dark background asteroid from the outer regions of the asteroid belt, approximately 35 kilometers in diameter. It was discovered on 1 September 1926, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany. The asteroid was named after Petrorhagia, a flowering plant also known as "Tunica".

    1151 Ithaka, provisional designation 1929 RK, is a carbonaceous asteroid from the inner regions of the asteroid belt, approximately 14 kilometers in diameter. It was discovered by Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in 1929, and later named for the Greek island of Ithaca.

    1156 Kira, provisional designation 1928 DA, is a stony background asteroid from the inner regions of the asteroid belt, approximately 9 kilometers in diameter. It was discovered on 22 February 1928, by German astronomer Karl Reinmuth at Heidelberg Observatory in southwest Germany. Any reference of its name to a person or occurrence is unknown.

    2500 Alascattalo, provisional designation 1926 GC, is a stony Flora asteroid from the inner regions of the asteroid belt, approximately 8 kilometers in diameter.

    1651 Behrens, provisional designation 1936 HD, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 10 kilometers in diameter. Discovered by Marguerite Laugier in 1936, it was named after Johann Behrens.

    2637 Bobrovnikoff, provisional designation A919 SB, is a background asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter. It was discovered on 22 September 1919, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in Heidelberg, Germany. The presumed spherical S-type asteroid has a rotation period of 4.79 hours. It is named after astronomer Nicholas Bobrovnikoff, who was the director of the Perkins Observatory in Ohio, United States.

    <span class="mw-page-title-main">1335 Demoulina</span>

    1335 Demoulina, provisional designation 1934 RE, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. Discovered by Karl Reinmuth at Heidelberg Observatory in 1934, the asteroid was named after Prof. Demoulin, a Belgian astronomer at Ghent University. It has a slower-than average spin rate of nearly 75 hours.

    2591 Dworetsky, provisional designation 1949 PS, is a stony asteroid from the outer region of the asteroid belt, approximately 13 kilometers in diameter.

    1253 Frisia, provisional designation 1931 TV1, is a carbonaceous Themistian asteroid from the outer regions of the asteroid belt, approximately 20 kilometers in diameter. Discovered by Karl Reinmuth at Heidelberg Observatory in 1931, the asteroid was later named after the region of Frisia and the Frisian Islands.

    <span class="mw-page-title-main">1251 Hedera</span>

    1251 Hedera is a background asteroid from the central regions of the asteroid belt, approximately 13 kilometers in diameter. It was discovered on 25 January 1933, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany. The asteroid was named for the climbing plant Hedera, commonly known as "ivy".

    <span class="mw-page-title-main">1175 Margo</span>

    1175 Margo, provisional designation 1930 UD, is a stony background asteroid from the outermost regions of the asteroid belt, approximately 24 kilometers in diameter. It was discovered on 17 October 1930, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany. The meaning of the asteroids's name is unknown.

    1720 Niels, provisional designation 1935 CQ, is a stony asteroid from the inner regions of the asteroid belt, approximately 6.4 kilometers in diameter. It was discovered on 7 February 1935, by German astronomer Karl Reinmuth at Heidelberg Observatory in southern Germany, and named after a grandson of the discoverer.

    1881 Shao, provisional designation 1940 PC or 1968 OO, is a background asteroid from the outer regions of the asteroid belt, approximately 25 kilometers in diameter. It was discovered on 3 August 1940, by German astronomer Karl Reinmuth at the Heidelberg Observatory in southwest Germany. The presumed C-type asteroid has a rotation period of 7.45 hours. It was named for Chinese astronomer Cheng-yuan Shao.

    1628 Strobel, provisional designation 1923 OG, is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 55 kilometers in diameter.

    <span class="mw-page-title-main">1704 Wachmann</span>

    1704 Wachmann, provisional designation A924 EE, is a stony asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered by German astronomer Karl Reinmuth at Heidelberg Observatory on 7 March 1924. It was later named after astronomer Arno Wachmann.

    <span class="mw-page-title-main">1719 Jens</span>

    1719 Jens is a background asteroid from the central region of the asteroid belt, approximately 19 kilometers in diameter. It was discovered on 17 February 1950, by German astronomer Karl Reinmuth at Heidelberg Observatory in southern Germany. It was named after a grandson of the discoverer.

    <span class="mw-page-title-main">1632 Sieböhme</span>

    1632 Sieböhme, provisional designation 1941 DF, is an asteroid and relatively slow rotator from the middle region of the asteroid belt, approximately 27 kilometers in diameter. It was discovered on 26 February 1941, by German astronomer Karl Reinmuth at Heidelberg Observatory in southern Germany. It was later named after ARI-astronomer Siegfried Böhme.

    References

    1. 1 2 3 4 5 6 7 8 "JPL Small-Body Database Browser: 1665 Gaby (1930 DQ)" (2017-03-15 last obs.). Jet Propulsion Laboratory . Retrieved 6 June 2017.
    2. 1 2 3 Schmadel, Lutz D. (2007). "(1665) Gaby". Dictionary of Minor Planet Names – (1665) Gaby. Springer Berlin Heidelberg. p. 132. doi:10.1007/978-3-540-29925-7_1666. ISBN   978-3-540-00238-3.
    3. 1 2 3 4 5 "LCDB Data for (1665) Gaby". Asteroid Lightcurve Database (LCDB). Retrieved 23 December 2016.
    4. 1 2 3 Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J.; et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal. 741 (2): 20. arXiv: 1109.4096 . Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68 . Retrieved 23 December 2016.
    5. 1 2 3 4 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv: 1109.6407 . Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90.
    6. 1 2 3 4 5 Pravec, Petr; Harris, Alan W.; Kusnirák, Peter; Galád, Adrián; Hornoch, Kamil (September 2012). "Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations". Icarus. 221 (1): 365–387. Bibcode:2012Icar..221..365P. doi:10.1016/j.icarus.2012.07.026 . Retrieved 23 December 2016.
    7. 1 2 Behrend, Raoul. "Asteroids and comets rotation curves – (1665) Gaby". Geneva Observatory . Retrieved 23 December 2016.
    8. 1 2 Hanus, J.; Durech, J.; Broz, M.; Warner, B. D.; Pilcher, F.; Stephens, R.; et al. (June 2011). "A study of asteroid pole-latitude distribution based on an extended set of shape models derived by the lightcurve inversion method". Astronomy & Astrophysics. 530: 16. arXiv: 1104.4114 . Bibcode:2011A&A...530A.134H. doi:10.1051/0004-6361/201116738 . Retrieved 23 December 2016.
    9. 1 2 Hanus, J.; Durech, J.; Oszkiewicz, D. A.; Behrend, R.; Carry, B.; Delbo, M.; et al. (February 2016). "New and updated convex shape models of asteroids based on optical data from a large collaboration network". Astronomy and Astrophysics. 586: 24. arXiv: 1510.07422 . Bibcode:2016A&A...586A.108H. doi:10.1051/0004-6361/201527441.
    10. 1 2 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: 1506.00762 . Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007 . Retrieved 23 December 2016.
    11. ↑ Harris, A. W.; Young, J. W.; Dockweiler, Thor; Gibson, J.; Poutanen, M.; Bowell, E. (January 1992). "Asteroid lightcurve observations from 1981". Icarus. 95 (1): 115–147.ResearchsupportedbyLowellObservatoryEndowmentandNASA. Bibcode:1992Icar...95..115H. doi:10.1016/0019-1035(92)90195-D. ISSN   0019-1035 . Retrieved 23 December 2016.
    12. 1 2 "1665 Gaby (1930 DQ)". Minor Planet Center. Retrieved 23 December 2016.
    13. ↑ Schmadel, Lutz D. "Appendix – Publication Dates of the MPCs". Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008). Springer Berlin Heidelberg. p. 221. doi:10.1007/978-3-642-01965-4. ISBN   978-3-642-01964-7.
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