6980 Kyusakamoto

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6980 Kyusakamoto
Discovery  [1]
Discovered by K. Endate
K. Watanabe
Discovery site Kitami Obs.
Discovery date16 September 1993
Designations
(6980) Kyusakamoto
Named after
 Kyu Sakamoto
(Japanese singer) [2]
1993 SV1 ·1979 WH7
1988 RU13
main-belt  · Koronis   [3]
Orbital characteristics   [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 36.98 yr (13,508 days)
Aphelion 2.9663 AU
Perihelion 2.7030 AU
2.8347 AU
Eccentricity 0.0464
4.77 yr (1,743 days)
62.052°
0° 12m 23.4s / day
Inclination 3.2909°
97.461°
211.58°
TJupiter 3.3080
Physical characteristics
Dimensions8.791±0.081 km [4] [5]
8.98 km (calculated) [3]
3.2526±0.0042 h (R) [6]
3.2529±0.0042 h (S) [6]
0.24 (assumed) [3]
0.301±0.037 [4] [5]
S   [3]
12.2 [4]  ·12.367±0.002(R) [6]  ·12.4 [1] [3]  ·12.45±0.07 [7]  ·12.966±0.003(S) [6]

    6980 Kyusakamoto, provisional designation 1993 SV1, is a stony Koronis asteroid from the outer region of the asteroid belt, approximately 9 kilometers in diameter. It was discovered by Japanese astronomers Kin Endate and Kazuro Watanabe at Kitami Observatory on 16 September 1993. [8] The asteroid was named after Japanese singer Kyu Sakamoto. [2]

    Contents

    Orbit and classification

    Kyusakamoto is a member of the Koronis family, which is named after 158 Koronis and consists of about 300 known bodies with nearly ecliptical orbits. It orbits the Sun in the outer main-belt at a distance of 2.7–3.0  AU once every 4 years and 9 months (1,743 days). Its orbit has an eccentricity of 0.05 and an inclination of 3° with respect to the ecliptic. [1]

    In November 1979, it was first identified as 1979 WH7 at Crimea–Nauchnij, extending the body's observation arc by 14 years prior to its official discovery observation at Kitami. [8]

    Physical characteristics

    Rotation period

    In August 2012, a rotational lightcurve of Kyusakamoto was obtained through photometric observations at the Palomar Transient Factory, California. The lightcurve showed a period of 3.2529±0.0042 hours with a brightness amplitude of 0.40 in magnitude (U=2 ). In the Mould-R filter (R), a different photometric band, the observations rendered a nearly identical period of 3.2526±0.0042 hours with an amplitude of 0.41 (U=2 ). [6]

    Diameter and albedo

    According to the survey carried out by the NEOWISE mission of NASA's space-based Wide-field Infrared Survey Explorer, Kyusakamoto measures 8.8 kilometers in diameter and its surface has a high albedo of 0.30, [4] [5] while the Collaborative Asteroid Lightcurve Link assumes a stony albedo of 0.24 and calculates a slightly larger diameter of 9.0 kilometers. [3]

    Naming

    This minor planet was named in memory of Japanese popular singer Kyu Sakamoto (1941–1985), who died in the crash of Japan Airlines Flight 123, the deadliest single-aircraft accident in history. Adored as "Kyu-chan", he is best known for his hit, I Look Up As I Walk ("Sukiyaki"), which became a worldwide bestseller. The naming also refers to his collaborators Rokusuke Ei and Hachidai Nakamura, songwriter and pianist, respectively. [2] The official naming citation was published by the Minor Planet Center on 5 October 1998 ( M.P.C. 32789). [9]

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    References

    1. 1 2 3 4 "JPL Small-Body Database Browser: 6980 Kyusakamoto (1993 SV1)" (2016-11-10 last obs.). Jet Propulsion Laboratory . Retrieved 21 June 2017.
    2. 1 2 3 Schmadel, Lutz D. (2007). "(6980) Kyusakamoto". Dictionary of Minor Planet Names – (6980) Kyusakamoto. Springer Berlin Heidelberg. p. 569. doi:10.1007/978-3-540-29925-7_6220. ISBN   978-3-540-00238-3.
    3. 1 2 3 4 5 6 "LCDB Data for (6980) Kyusakamoto". Asteroid Lightcurve Database (LCDB). Retrieved 19 May 2016.
    4. 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 . Retrieved 19 May 2016.
    5. 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 5 December 2016.
    6. 1 2 3 4 5 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 19 May 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: 1506.00762 . Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007 . Retrieved 19 May 2016.
    8. 1 2 "6980 Kyusakamoto (1993 SV1)". Minor Planet Center. Retrieved 16 April 2016.
    9. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 19 May 2016.
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