1328 Devota

1328 Devota, provisional designation 1925 UA, is a dark background asteroid from the outermost regions of the asteroid belt, approximately 56 kilometers in diameter. It was discovered on 21 October 1925, by Russian–French astronomer Benjamin Jekhowsky at the Algiers Observatory in North Africa.[12] The asteroid was named after Argentine astronomer Fortunato Devoto.[2]

1328 Devota
Modelled shape of Devota from its lightcurve
Discovery [1]
Discovered byB. Jekhovsky
Discovery siteAlgiers Obs.
Discovery date21 October 1925
Designations
(1328) Devota
Named after
Fortunato Devoto [2]
(Argentine astronomer)
1925 UA · 1938 UC
1951 TQ · 1951 TT
1964 UD
main-belt · (outer) [1][3]
background [4]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc92.02 yr (33,612 days)
Aphelion3.9778 AU
Perihelion3.0334 AU
3.5056 AU
Eccentricity0.1347
6.56 yr (2,397 days)
13.874°
0° 9m 0.72s / day
Inclination5.7658°
222.69°
174.63°
Physical characteristics
Dimensions53.697±0.481 km[5]
55.288±0.434 km[6]
56.06±0.91 km[7]
57.11±5.1 km[3][8]
17.49±0.01 h[9]
0.0407±0.008[3][8]
0.043±0.002[7]
0.0434±0.0064[6]
0.046±0.005[5]
Tholen = X [1][3]
P [6] · D [10][11]
B–V = 0.695[1]
U–B = 0.210[1]
10.09±0.25[10] · 10.31[1][3][6][7]

    Orbit and classification

    Devota is a non-family asteroid from the main belt's background population.[4] It orbits the Sun in the outermost asteroid belt at a distance of 3.0–4.0 AU once every 6 years and 7 months (2,397 days; semi-major axis of 3.51 AU). Its orbit has an eccentricity of 0.13 and an inclination of 6° with respect to the ecliptic.[1] The body's observation arc begins at Algiers, three nights after its official discovery observation.[12]

    Physical characteristics

    In the Tholen classification, Devota is an X-type asteroid,[1][3] while the Wide-field Infrared Survey Explorer (WISE) characterized it as a primitive P-type.[6] Other spectroscopic and photometric surveys as well as the Bus–DeMeo taxonomy classified the asteroid as a D-type due to its low albedo value and its featureless and reddish spectrum.[10][11]:22

    Rotation period

    In August 2009, a rotational lightcurve of Devota was obtained from photometric observations by French amateur astronomer Pierre Antonini. Lightcurve analysis gave a rotation period of 17.49 hours with a brightness amplitude of 0.20 magnitude (U=2-). The observer also notes that there are several other possible period solutions ("plusieurs solutions entre 0.6 et 1 jour").[9] As of 2017, no secure period has been obtained.[3]

    Diameter and albedo

    According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's WISE telescope, Devota measures between 53.697 and 56.06 kilometers in diameter and its surface has an albedo between 0.043 and 0.046.[5][6][7][8]

    The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.0407 and a diameter of 57.11 kilometers based on an absolute magnitude of 10.31.[3][8]

    Naming

    This minor planet was named by the discoverer after his friend, the Argentine astronomer Fortunato Devoto, who was the discoverer of the La Plata Observatory and president of the National Council of Observatories of Argentina. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 121).[2]

    References
    1. "JPL Small-Body Database Browser: 1328 Devota (1925 UA)" (2017-11-02 last obs.). Jet Propulsion Laboratory. Retrieved 29 November 2017.
    2. Schmadel, Lutz D. (2007). "(1328) Devota". Dictionary of Minor Planet Names – (1328) Devota. Springer Berlin Heidelberg. p. 108. doi:10.1007/978-3-540-29925-7_1329. ISBN 978-3-540-00238-3.
    3. "LCDB Data for (1328) Devota". Asteroid Lightcurve Database (LCDB). Retrieved 29 November 2017.
    4. "Asteroid 1328 Devota – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 29 October 2019.
    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.
    6. 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.
    7. 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)
    8. 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.
    9. Behrend, Raoul. "Asteroids and comets rotation curves – (1328) Devota". Geneva Observatory. Retrieved 29 November 2017.
    10. 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 29 November 2017.
    11. Fornasier, S.; Clark, B. E.; Dotto, E. (July 2011). "Spectroscopic survey of X-type asteroids". Icarus. 214 (1): 131–146. arXiv:1105.3380. Bibcode:2011Icar..214..131F. doi:10.1016/j.icarus.2011.04.022.
    12. "1328 Devota (1925 UA)". Minor Planet Center. Retrieved 29 November 2017.

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