1334 Lundmarka

1334 Lundmarka, provisional designation 1934 OB, is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 30 kilometers in diameter. It was discovered on 16 July 1934, by German astronomer Karl Reinmuth at Heidelberg Observatory in southern Germany, and named after Swedish astronomer Knut Lundmark.[2][9]

1334 Lundmarka
Shape model of Lundmarka from its lightcurve
Discovery[1]
Discovered byK. Reinmuth
Discovery siteHeidelberg Obs.
Discovery date16 July 1934
Designations
(1334) Lundmarka
Named after
Knut Lundmark (astronomer)[2]
1934 OB
main-belt · (outer)[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc82.89 yr (30,274 days)
Aphelion3.1912 AU
Perihelion2.6376 AU
2.9144 AU
Eccentricity0.0950
4.98 yr (1,817 days)
286.14°
0° 11m 53.16s / day
Inclination11.453°
133.23°
129.65°
Physical characteristics
Dimensions27.62±2.33 km[4]
29.82±3.2 km (IRAS:14)[5]
30.35 km (derived)[3]
6.250±0.003 h[6]
6.25033±0.00001 h[7]
0.0600±0.016 (IRAS:14)[5]
0.1455 (derived)[3]
0.242±0.246[4]
X[8] · C[3]
9.95[4] · 10.3[3] · 10.4[1] · 10.71±0.20[8]

    Orbit and classification

    Lundmarka is classified as C-type and X-type asteroid by the LCDB and Pan-STARRS, respectively.[3][8] It orbits the Sun in the outer main-belt at a distance of 2.6–3.2 AU once every 4 years and 12 months (1,817 days). Its orbit has an eccentricity of 0.10 and an inclination of 11° with respect to the ecliptic.[1] The body's observation arc begins with its official discovery observation at Heidelberg, as no precoveries were taken and no prior identifications were made.[9]

    Rotation period

    A rotational lightcurve of Lundmarka was obtained from photometric observations made at the Australian Oakley Southern Sky Observatory (E09) in September 2014. The lightcurve gave a rotation period of 6.250±0.003 hours with a brightness variation of 0.70 in magnitude (U=3-).[6]

    In March 2016, a second period was published based on data from the Lowell Photometric Database. Using lightcurve inversion and convex shape models, as well as distributed computing power and the help of individual volunteers, a period of 6.25033±0.00001 hours was derived from the database's sparse-in-time photometry data (U=n.a.).[7]

    Diameter and albedo

    According to the surveys carried out by the Infrared Astronomical Satellite (IRAS) and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Lundmarka measures 29.8 and 27.6 kilometers in diameter, respectively, and its surface has a corresponding albedo of 0.06 and 0.24.[1][4] The Collaborative Asteroid Lightcurve Link derives an intermediary albedo of 0.146 and a diameter of 30.4 kilometers.[3]

    Naming

    This minor planet was named in memory of Swedish astronomer Knut Lundmark (1889–1958), who was the head of the Lund Observatory. He thoroughly analyzed galaxies and globular clusters, and pioneered in measuring galactic distances and absolute stellar magnitudes. Lundmark also appeared in national radio with programs on popular astronomy and the history of science. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 121).[2] The lunar crater Lundmark is also named in his honour.[2]

    References
    1. "JPL Small-Body Database Browser: 1334 Lundmarka (1934 OB)" (2017-06-04 last obs.). Jet Propulsion Laboratory. Retrieved 25 July 2017.
    2. Schmadel, Lutz D. (2007). "(1334) Lundmarka". Dictionary of Minor Planet Names – (1334) Lundmarka. Springer Berlin Heidelberg. p. 109. doi:10.1007/978-3-540-29925-7_1335. ISBN 978-3-540-00238-3.
    3. "LCDB Data for (1334) Lundmarka". Asteroid Lightcurve Database (LCDB). Retrieved 17 May 2016.
    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 17 May 2016.
    5. Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. 12: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T. Retrieved 22 October 2019.
    6. Bohn, Lucas; Hibbler, Brianna; Stein, Gregory; Ditteon, Richard (April 2015). "Asteroid Lightcurve Analysis at the Oakley Southern Sky Observatory: 2014 September". The Minor Planet Bulletin. 42 (2): 89–90. Bibcode:2015MPBu...42...89B. ISSN 1052-8091. Retrieved 17 May 2016.
    7. Durech, J.; Hanus, J.; Oszkiewicz, D.; Vanco, R. (March 2016). "Asteroid models from the Lowell photometric database". Astronomy and Astrophysics. 587: 6. arXiv:1601.02909. Bibcode:2016A&A...587A..48D. doi:10.1051/0004-6361/201527573. Retrieved 17 May 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 17 May 2016.
    9. "1334 Lundmarka (1934 OB)". Minor Planet Center. Retrieved 17 May 2016.

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