1136 Mercedes

1136 Mercedes, provisional designation 1929 UA, is a background asteroid from the central regions of the asteroid belt, approximately 26 kilometers in diameter. It was discovered on 30 October 1929, by Catalan astronomer Josep Comas i Solà at the Fabra Observatory in Barcelona, Spain.[14] The asteroid was named for the sister-in-law of the discoverer.[2]

1136 Mercedes
Discovery[1]
Discovered byJ. Comas Solà
Discovery siteFabra Obs.
Discovery date30 October 1929
Designations
(1136) Mercedes
Named after
Mercedes[2]
(discoverer's sister-in-law)
1929 UA · 1966 XB
main-belt · (middle)
background[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc86.23 yr (31,497 days)
Aphelion3.2207 AU
Perihelion1.9111 AU
2.5659 AU
Eccentricity0.2552
4.11 yr (1,501 days)
171.68°
0° 14m 23.28s / day
Inclination8.9825°
209.53°
148.49°
Physical characteristics
Dimensions25.23 km (derived)[4]
25.296±0.249 km[5]
26.29±6.21 km[6]
26.349±0.078 km[7]
26.66±0.28 km[8]
33.19±6.54 km[9]
6.448±0.002 h[10]
15.6 h (poor)[11]
24.64±0.01 h[12]
0.05±0.04[9]
0.08±0.06[6]
0.084±0.015[5]
0.1007 (derived)[4]
0.1018±0.0230[7]
0.103±0.003[8]
S (assumed)[4]
11.00[7][8] · 11.10[4][6] · 11.2[1] · 11.22[9] · 11.68±0.75[13]

    Orbit and classification

    Mercedes is not a member of any known asteroid family and belongs to the belt's background population.[3] It orbits the Sun in the central main-belt at a distance of 1.9–3.2 AU once every 4 years and 1 month (1,501 days). Its orbit has an eccentricity of 0.26 and an inclination of 9° with respect to the ecliptic.[1] The body's observation arc begins at Yerkes Observatory in March 1931, more than a year after its official discovery observation at Fabra.[14]

    Physical characteristics

    Mercedes is an assumed S-type asteroid.[4]

    Rotation period

    The asteroid has an ambiguous rotation period. A lightcurve of Mercedes obtained in 1998, gave a period of 6.448 hours and a brightness variation of 0.10 magnitude (U=2),[10] while another lightcurve from 2007, gave a much longer period of 24.64 hours with an amplitude of 0.15 (U=2).[12] A third period of 15.6 hours is considered of poor quality (U=1).[11]

    Diameter and albedo

    According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Mercedes measures between 25.296 and 33.19 kilometers in diameter and its surface has an albedo between 0.05 and 0.103.[5][6][7][8][9]

    The Collaborative Asteroid Lightcurve Link derives an albedo of 0.1007 and a diameter of 25.23 kilometers based on an absolute magnitude of 11.1.[4]

    Naming

    This minor planet was named by Josep Comas i Solà for his sister-in-law, Mercedes. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 106).[2]

    References
    1. "JPL Small-Body Database Browser: 1136 Mercedes (1929 UA)" (2017-06-03 last obs.). Jet Propulsion Laboratory. Retrieved 9 September 2017.
    2. Schmadel, Lutz D. (2007). "(1136) Mercedes". Dictionary of Minor Planet Names – (1136) Mercedes. Springer Berlin Heidelberg. p. 96. doi:10.1007/978-3-540-29925-7_1137. ISBN 978-3-540-00238-3.
    3. "Asteroid 1136 Mercedes – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 28 October 2019.
    4. "LCDB Data for (1136) Mercedes". Asteroid Lightcurve Database (LCDB). Retrieved 9 September 2017.
    5. Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R.; et al. (August 2014). "Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos". The Astrophysical Journal. 791 (2): 11. arXiv:1406.6645. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. Retrieved 9 September 2017.
    6. Nugent, C. R.; Mainzer, A.; Masiero, J.; Bauer, J.; Cutri, R. M.; Grav, T.; et al. (December 2015). "NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos". The Astrophysical Journal. 814 (2): 13. arXiv:1509.02522. Bibcode:2015ApJ...814..117N. doi:10.1088/0004-637X/814/2/117. Retrieved 9 September 2017.
    7. 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.
    8. Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. (online, AcuA catalog p. 153)
    9. Nugent, C. R.; Mainzer, A.; Bauer, J.; Cutri, R. M.; Kramer, E. A.; Grav, T.; et al. (September 2016). "NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos". The Astronomical Journal. 152 (3): 12. arXiv:1606.08923. Bibcode:2016AJ....152...63N. doi:10.3847/0004-6256/152/3/63. Retrieved 9 September 2017.
    10. Gil-Hutton, R.; Cañ; ada, M. (April 2003). "Photometry of Fourteen Main Belt Asteroids". Revista Mexicana de Astronomía y Astrofísica. 39: 69–76. Bibcode:2003RMxAA..39...69G. Retrieved 9 September 2017.
    11. Behrend, Raoul. "Asteroids and comets rotation curves – (1136) Mercedes". Geneva Observatory. Retrieved 9 September 2017.
    12. Brinsfield, James W. (September 2008). "Asteroid Lightcurve Analysis at the Via Capote Observatory: First Quarter 2008". The Minor Planet Bulletin. 35 (3): 119–122. Bibcode:2008MPBu...35..119B. ISSN 1052-8091. Retrieved 9 September 2017.
    13. 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 9 September 2017.
    14. "1136 Mercedes (1929 UA)". Minor Planet Center. Retrieved 9 September 2017.

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