2648 Owa

2648 Owa, provisional designation 1980 VJ, is a background asteroid from the Flora region of the inner asteroid belt, approximately 6 kilometers (4 miles) in diameter. It was discovered on 8 November 1980, by American astronomer Edward Bowell at the Anderson Mesa Station near Flagstaff, Arizona, in the United States.[1] The presumably S-type asteroid has a rotation period of 3.56 hours.[4] It was named for the word "rock" in the Native American Hopi language.[2]

2648 Owa
Discovery [1]
Discovered byE. Bowell
Discovery siteAnderson Mesa Stn.
Discovery date8 November 1980
Designations
(2648) Owa
Named after
"rock" in Hopi [2]
1980 VJ · 1926 VD
1953 TJ
main-belt [1][3] · (inner)
Flora [4] · background [5][6]
Orbital characteristics [3]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc91.29 yr (33,345 d)
Aphelion2.6438 AU
Perihelion1.8565 AU
2.2502 AU
Eccentricity0.1749
3.38 yr (1,233 d)
12.319°
0° 17m 31.2s / day
Inclination4.7966°
279.91°
131.33°
Physical characteristics
Mean diameter
5.40±0.25 km[7]
5.76±0.91 km[8]
5.933±0.160 km[9][10]
6.81 km (calculated)[4]
3.56±0.01 h[11]
3.563±0.002 h[lower-alpha 1]
3.563 h[12]
3.5641±0.0001 h[lower-alpha 2][lower-alpha 3]
3.567±0.002 h[13]
0.24 (assumed)[4]
0.38±0.17[8]
0.4174±0.0904[10]
0.459±0.029[7]
S (assumed)[4]
12.7[10] · 12.80[7]
12.88±0.32[14]
12.90[8] · 13.0[3][4]

    Orbit and classification

    Owa is a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements.[5][6] Based on osculating Keplerian orbital elements, the asteroid has also been classified as a member of the Flora family (402), a giant asteroid family and the largest family of stony asteroids in the main-belt.[4]

    It orbits the Sun in the inner main-belt at a distance of 1.9–2.6 AU once every 3 years and 5 months (1,233 days; semi-major axis of 2.25 AU). Its orbit has an eccentricity of 0.17 and an inclination of 5° with respect to the ecliptic.[3] The asteroid was first observed as 1926 VD at Heidelberg Observatory in November 1926. The body's observation arc begins at Turku Observatory in October 1953, more than 27 years prior to its official discovery observation at Anderson Mesa.[1]

    Physical characteristics

    Owa is an assumed, stony S-type asteroid.[4]

    Rotation period

    In 2007, four rotational lightcurves of Owa were obtained from photometric observations by James W. Brinsfield at Via Capote Observatory (G69),[11] by astronomers at the National Undergraduate Research Observatory (NURO),[12] as well as by Petr Pravec and Pierre Antonini (U=3-/3-/3/3).[13][lower-alpha 2] In 2012, another lightcurve was obtained by David Higgins (U=3).[lower-alpha 1] The consolidated result gave a rotation period of 3.5641 hours with a brightness amplitude between 0.20 and 0.35 magnitude (U=3).[4][lower-alpha 3]

    Diameter and albedo

    According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Owa measures between 5.40 and 5.933 kilometers in diameter and its surface has an albedo between 0.38 and 0.459.[7][8][9][10]

    The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – derived from 8 Flora, the parent body of the Flora family – and calculates a diameter of 6.81 kilometers based on an absolute magnitude of 13.0.[4]

    Naming

    This minor planet was named after the Hopi word for "rock". The Hopi are a Native American tribe, who primarily live on the Hopi Reservation in northern Arizona. The asteroid's name was suggested by German-American linguist Ekkehart Malotki.[2] The official naming citation was published by the Minor Planet Center on 1 December 1982 (M.P.C. 7473).[15]

    Notes
    1. Higgins (2012) web: rotation period 3.563±0.002 hours with a brightness amplitude of 0.35±0.02 mag. Quality code of 3. Summary figures at the LCDB
    2. Pravec (Oct 2007) web: rotation period 3.5641±0.0001 hours with a brightness amplitude of 0.23±0.02 mag. Quality Code is 3. Summary figures at the LCDB and Pravec, P.; Wolf, M.; Sarounova, L. (2007)
    3. Lightcurve plot-A and plot-B of (2648) Owa from Ondrejov data obtained by the NEO Photometric Program and collaborating projects.

    References
    1. "2648 Owa (1980 VJ)". Minor Planet Center. Retrieved 6 April 2018.
    2. Schmadel, Lutz D. (2007). "(2648) Owa". Dictionary of Minor Planet Names – (2648) Owa. Springer Berlin Heidelberg. pp. 216–217. doi:10.1007/978-3-540-29925-7_2649. ISBN 978-3-540-00238-3.
    3. "JPL Small-Body Database Browser: 2648 Owa (1980 VJ)" (2018-02-25 last obs.). Jet Propulsion Laboratory. Retrieved 6 April 2018.
    4. "LCDB Data for (2648) Owa". Asteroid Lightcurve Database (LCDB). Retrieved 6 April 2018.
    5. "Asteroid 2648 Owa – Asteroid Dynamical Families V4.1". Small Bodies Data Ferret. Retrieved 29 October 2019.
    6. "Asteroid 2648 Owa – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 29 October 2019.
    7. 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.
    8. 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.
    9. Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J.; et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal. 741 (2): 20. arXiv:1109.4096. Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68. Retrieved 6 April 2018.
    10. 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.
    11. Brinsfield, James W. (June 2008). "The Rotation Periods of 531 Zerlina, 1194 Aleta 1352 Wawel, 2005 Hencke, 2648 Owa, and 3509 Sanshui". The Minor Planet Bulletin. 35 (2): 86–87. Bibcode:2008MPBu...35...86B. ISSN 1052-8091. Retrieved 6 April 2018.
    12. Johnson, Thomas; Pech, Katherin; van Schilfgaarde, Ryan; Chase, Matt; Burns, M. Shane (October 2008). "Lightcurve Analysis of 102 Miriam, 1433 Geramtina, and 2648 Owa". The Minor Planet Bulletin. 35 (4): 151–152. Bibcode:2008MPBu...35..151J. ISSN 1052-8091. Retrieved 6 April 2018.
    13. Behrend, Raoul. "Asteroids and comets rotation curves – (2648) Owa". Geneva Observatory. Retrieved 6 April 2018.
    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.
    15. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 6 April 2018.

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