11949 Kagayayutaka

11949 Kagayayutaka
Discovery [1]
Discovered by K. Endate
K. Watanabe
Discovery site Kitami Obs.
Discovery date 19 September 1993
Designations
MPC designation 11949 Kagayayutaka
Named after
 Kagaya Yutaka (artist)[2]
1993 SD2 · 1998 QV62
main-belt · (outer) [3]
Orbital characteristics [1]
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 0
Observation arc 23.14 yr (8,453 days)
Aphelion 3.6333 AU
Perihelion 2.5442 AU
3.0887 AU
Eccentricity 0.1763
5.43 yr (1,983 days)
14.273°
0° 10m 53.76s / day
Inclination 7.6252°
226.01°
249.41°
Physical characteristics
Dimensions 22.28±6.88 km[4]
23.21 km (calculated)[3]
3.96±0.03 h[5]
0.057 (assumed)[3]
0.708[4]
S [6] · C [3]
11.80[4] · 11.9[1][3] · 11.91±0.58[6]

    11949 Kagayayutaka, provisional designation 1993 SD2, is an asteroid from the outer region of the asteroid belt, approximately 23 kilometers in diameter. It was discovered on 19 September 1993, by Japanese amateur astronomers Kin Endate and Kazuro Watanabe at Kitami Observatory in eastern Hokkaidō, Japan.[7]

    The asteroid orbits the Sun at a distance of 2.5–3.6 AU once every 5 years and 5 months (1,983 days). Its orbit has an eccentricity of 0.18 and an inclination of 8° with respect to the ecliptic.[1] As no precoveries were taken, the asteroid's observation arc starts with its discovery observation in September 1993.[7]

    The body is classified as both a C and S-type asteroid by the Collaborative Asteroid Lightcurve Link (CALL) and Pan-STARRS survey of magnitudes, respectively.[3][4] According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, the asteroid measures 22.28 kilometers in diameter and its surface has a high albedo of 0.708,[4] while CALL assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 23.21 kilometers.[3]

    A rotational light-curve was obtained for this asteroid from photometric observations by French astronomer René Roy in November 2015. It gave a provisional rotation period of 3.96±0.03 hours with a brightness variation of 0.28 in magnitude (U=3-).[5]

    The minor planet was named after Kagaya Yutaka (b. 1968), the Japanese space and digital artist and receiver of the Gold Medal in the American Digital Art Contest in 2000.[2] Naming citation was published on 10 September 2003 (M.P.C. 49674).[8]

    References

    1. 1 2 3 4 "JPL Small-Body Database Browser: 11949 Kagayayutaka (1993 SD2)" (2016-11-10 last obs.). Jet Propulsion Laboratory. Retrieved 4 December 2016.
    2. 1 2 Schmadel, Lutz D. (2006). Dictionary of Minor Planet Names – (11949) Kagayayutaka, Addendum to Fifth Edition: 2003–2005. Springer Berlin Heidelberg. p. 66. ISBN 978-3-540-34361-5. Retrieved 22 August 2016.
    3. 1 2 3 4 5 6 7 "LCDB Data for (11949) Kagayayutaka". Asteroid Lightcurve Database (LCDB). Retrieved 22 August 2016.
    4. 1 2 3 4 5 Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters. 759 (1): 5. arXiv:1209.5794Freely accessible. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 22 August 2016.
    5. 1 2 Behrend, Raoul. "Asteroids and comets rotation curves – (11949) Kagayayutaka". Geneva Observatory. Retrieved 22 August 2016.
    6. 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:1506.00762Freely accessible. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 22 August 2016.
    7. 1 2 "11949 Kagayayutaka (1993 SD2)". Minor Planet Center. Retrieved 22 August 2016.
    8. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 22 August 2016.

    External links

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