1832 Mrkos

1832 Mrkos, provisional designation 1969 PC, is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 30 kilometers in diameter. It was discovered on 11 August 1969 by Russian astronomer Lyudmila Chernykh at the Crimean Astrophysical Observatory in Nauchnyj, on the Crimean peninsula.[9] It was named after Czech astronomer Antonín Mrkos.[2]

1832 Mrkos
Discovery [1]
Discovered byL. Chernykh
Discovery siteCrimean Astrophysical Obs.
Discovery date11 August 1969
Designations
(1832) Mrkos
Named after
Antonín Mrkos (astronomer)[2]
1969 PC · 1937 CJ
main-belt · (outer) [1]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc80.14 yr (29,272 days)
Aphelion3.5486 AU
Perihelion2.8778 AU
3.2132 AU
Eccentricity0.1044
5.76 yr (2,104 days)
86.782°
0° 10m 15.96s / day
Inclination14.947°
303.42°
81.647°
Physical characteristics
Dimensions27.18±1.23 km[3]
29.35±0.38 km[4]
30.67 km (derived)[5]
30.78±2.4 km[6]
13.64±0.01 h[7]
0.0567 (derived)[5]
0.068±0.010[4]
0.0742±0.013[6]
0.097±0.010[3]
C [5]
11.0[3][6] · 11.20[4] · 11.3[1][5] · 11.55±0.21[8]

    Orbit and classification

    The C-type asteroid orbits the Sun in the outer main-belt at a distance of 2.9–3.5 AU once every 5 years and 9 months (2,104 days). Its orbit has an eccentricity of 0.10 and an inclination of 15° with respect to the ecliptic.[1] Mrkos was first observed and identified as 1937 CJ at Yerkes Observatory in 1937, extending the body's observation arc by 32 years prior to its official discovery observation.[9]

    Physical characteristics

    Rotation period

    In October 2004, a rotational lightcurve for Mrkos was obtained from photometric observations taken by American astronomer Brian Warner at his Palmer Divide Observatory in Colorado. It gave a rotation period of 13.64 hours with a brightness variation of 0.18 in magnitude (U=3-).[7]

    Diameter and albedo

    According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Mrkos measures between 27.18 and 30.78 kilometers in diameter, and its surface has an albedo between 0.068 and 0.097.[3][4][6] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0567 and a diameter of 30.67 kilometers with an absolute magnitude of 11.3.[5]

    Naming

    This minor planet was named in honor of Czech astronomer Antonín Mrkos (1918–1996), a prolific discoverer of 273 minor planets and well known for his contributions to cometary astronomy. He was the director of the Kleť Observatory in what is now the Czech Republic, initiated the first minor planet survey in his country, was a professor at Charles University in Prague and University of South Bohemia, and a participant of a Soviet Antarctic expedition in the late 1950s.[2] The official naming citation was published by the Minor Planet Center on 1 June 1975 (M.P.C. 3825).[10]

    References
    1. "JPL Small-Body Database Browser: 1832 Mrkos (1969 PC)" (2017-03-29 last obs.). Jet Propulsion Laboratory. Retrieved 8 June 2017.
    2. Schmadel, Lutz D. (2007). "(1832) Mrkos". Dictionary of Minor Planet Names – (1832) Mrkos. Springer Berlin Heidelberg. p. 147. doi:10.1007/978-3-540-29925-7_1833. ISBN 978-3-540-00238-3.
    3. 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. Retrieved 17 October 2019. (online, AcuA catalog p. 153)
    4. 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:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 15 December 2016.
    5. "LCDB Data for (1832) Mrkos". Asteroid Lightcurve Database (LCDB). Retrieved 15 December 2016.
    6. Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System – IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T. Retrieved 17 October 2019.
    7. Warner, Brian D. (June 2005). "Asteroid lightcurve analysis at the Palmer Divide Observatory - fall 2004". The Minor Planet Bulletin. 32 (2): 29–32. Bibcode:2005MPBu...32...29W. ISSN 1052-8091. Retrieved 15 December 2016.
    8. 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 15 December 2016.
    9. "1832 Mrkos (1969 PC)". Minor Planet Center. Retrieved 15 December 2016.
    10. 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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