1304 Arosa

1304 Arosa, provisional designation 1928 KC, is a metallic asteroid from the outer region of the asteroid belt, approximately 40 kilometers in diameter. It was discovered on 21 May 1928, by German astronomer Karl Reinmuth at Heidelberg Observatory in southwest Germany.[15] It was named after the Swiss mountain village of Arosa.[2]

1304 Arosa
Discovery [1]
Discovered byK. Reinmuth
Discovery siteHeidelberg Obs.
Discovery date21 May 1928
Designations
(1304) Arosa
Named after
Arosa (Swiss village)[2]
1928 KC · 1929 RY
1934 JL · 1934 LE
1974 OW · A908 YC
main-belt · (outer) [3]
background [4]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc108.22 yr (39,526 days)
Aphelion3.5731 AU
Perihelion2.8226 AU
3.1978 AU
Eccentricity0.1173
5.72 yr (2,089 days)
207.15°
0° 10m 20.64s / day
Inclination18.991°
86.580°
148.26°
Physical characteristics
Dimensions31.47±3.06 km[5]
41.67 km (derived)[3]
42.94±1.9 km[6]
43.613±0.241 km[7]
48.35±0.81 km[8]
57.443±1.462 km[9]
7.74 h[10]
7.7478±0.0001 h[11][12]
7.77±0.04 h[11]
0.1961±0.0279[9]
0.2125 (derived)[3]
0.279±0.011[8]
0.337±0.031[7]
0.3480±0.033[6]
0.409±0.084[5]
SMASS = X [1][3] · M [9]
8.6[6][8][9][13] · 9.03±0.27[14] · 9.10[5] · 9.2[1][3]

    Orbit and classification

    Arosa is a non-family asteroid from the main belt's background population.[4] It orbits the Sun in the outer asteroid belt at a distance of 2.8–3.6 AU once every 5 years and 9 months (2,089 days; semi-major axis of 3.20 AU). Its orbit has an eccentricity of 0.12 and an inclination of 19° with respect to the ecliptic.[1] It was first identified as A908 YC at the discovering observatory in 1908, extending the body's observation arc by 20 years prior to its official discovery.[15]

    Physical characteristics

    In the SMASS taxonomy, Arosa is classified as a generic X-type asteroid. The Wide-field Infrared Survey Explorer (WISE) groups it into the metallic M-type asteroid subcategory.[1][9]

    Rotation period

    Several rotational lightcurves were obtained from photometric observations between 2002 and 2006. Lightcurve analysis gave a well-defined rotation period of 7.74 hours with a brightness amplitude between 0.32 and 0.38 magnitude (U=3/3/3/2).[10][11][12]

    Diameter and albedo

    According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's WISE space telescope with its NEOWISE mission, Arosa measures between 31.47 and 57.443 kilometers in diameter, and its surface has an albedo between 0.1961 and 0.409.[5][6][7][8][9] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.2125 and a diameter of 41.67 kilometers, using an absolute magnitude of 9.2.[3]

    Naming

    This minor planet was named for the Swiss mountain village of Arosa, a summer and a winter tourist resort in the Swiss Alps. The official naming citation was also mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 119).[2]

    References
    1. "JPL Small-Body Database Browser: 1304 Arosa (1928 KC)" (2017-03-05 last obs.). Jet Propulsion Laboratory. Retrieved 25 July 2017.
    2. Schmadel, Lutz D. (2007). "(1304) Arosa". Dictionary of Minor Planet Names – (1304) Arosa. Springer Berlin Heidelberg. p. 107. doi:10.1007/978-3-540-29925-7_1305. ISBN 978-3-540-00238-3.
    3. "LCDB Data for (1304) Arosa". Asteroid Lightcurve Database (LCDB). Retrieved 14 March 2017.
    4. "Asteroid 1304 Arosa – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 29 October 2019.
    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:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 14 March 2017.
    6. 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.
    7. 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 14 March 2017.
    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. Retrieved 17 October 2019. (online, AcuA catalog p. 153)
    9. 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.
    10. Licchelli, Domenico (December 2006). "Lightcurve analysis of asteroids 453 Tea and 454 Mathesis". The Minor Planet Bulletin. 33 (4): 105–106. Bibcode:2006MPBu...33..105L. ISSN 1052-8091. Retrieved 14 March 2017.
    11. Behrend, Raoul. "Asteroids and comets rotation curves – (1304) Arosa". Geneva Observatory. Retrieved 14 March 2017.
    12. Fauerbach, Michael; Bennett, Thomas; Behrend, Raoul; Bernasconi, Laurent; Casulli, Silvano (December 2006). "Lightcurve analysis of 1304 Arosa". The Minor Planet Bulletin. 33 (4): 103. Bibcode:2006MPBu...33..103F. ISSN 1052-8091. Retrieved 14 March 2017.
    13. Tholen (2007). "Asteroid Absolute Magnitudes". EAR-A-5-DDR-ASTERMAG-V11.0. Planetary Data System. Archived from the original on 17 June 2012. Retrieved 14 March 2017.
    14. 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 14 March 2017.
    15. "1304 Arosa (1928 KC)". Minor Planet Center. Retrieved 14 March 2017.

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