1169 Alwine

1169 Alwine, provisional designation 1930 QH, is a Florian asteroid from the inner regions of the asteroid belt, approximately 8 kilometers in diameter. It was discovered on 30 August 1930, by German and Italian astronomers Max Wolf and Mario Ferrero at Heidelberg Observatory in southwest Germany.[5] Any reference of its name to a person is unknown.[2]

1169 Alwine
Discovery[1]
Discovered byM. F. Wolf
M. Ferrero
Discovery siteHeidelberg Obs.
Discovery date30 August 1930
Designations
(1169) Alwine
Named after
unknown[2]
1930 QH · 1937 VH
1955 SK1 · 1955 SR1
main-belt · (inner)
Flora[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc86.77 yr (31,691 days)
Aphelion2.6775 AU
Perihelion1.9599 AU
2.3187 AU
Eccentricity0.1547
3.53 yr (1,290 days)
155.85°
0° 16m 45.12s / day
Inclination4.0522°
255.08°
177.29°
Physical characteristics
Dimensions7.893±0.185 km[4]
0.179±0.024[4]
12.8[1]

    Orbit and classification

    Alwine is a member of the Flora family (402),[3] a giant asteroid family and the largest family of stony asteroids in the main belt.[6]: 23  It orbits the Sun in the inner asteroid belt at a distance of 2.0–2.7 AU once every 3 years and 6 months (1,290 days; semi-major axis of 2.32 AU). Its orbit has an eccentricity of 0.15 and an inclination of 4° with respect to the ecliptic.[1] As no precoveries were taken, and no prior identifications were made, Alwine's observation arc begins with its official discovery observation at Heidelberg in August 1930.[5]

    Physical characteristics

    According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Alwine measures 7.89 kilometers in diameter, and its surface has an albedo of 0.179.[4] Based on a generic magnitude-to-diameter conversion, its diameter is between 7 and 17 kilometers for an absolute magnitude of 12.8 and an albedo in the range of 0.05 to 0.25.[7]

    Lightcurve

    As of 2017, no rotational lightcurves have been obtained. The body's rotation period, pole and shape remain unknown.[1][8]

    Naming

    This minor planet is named after a common German female name. Any reference of this name to a person or occurrence is unknown.[2]

    Unknown meaning

    Among the many thousands of named minor planets, Alwine is one of 120 asteroids, for which no official naming citation has been published. All of these low-numbered asteroids have numbers between 164 Eva and 1514 Ricouxa and were discovered between 1876 and the 1930s, predominantly by astronomers Auguste Charlois, Johann Palisa, Max Wolf and Karl Reinmuth.[9]

    References
    1. "JPL Small-Body Database Browser: 1169 Alwine (1930 QH)" (2017-06-05 last obs.). Jet Propulsion Laboratory. Retrieved 26 July 2017.
    2. Schmadel, Lutz D. (2007). "(1169) Alwine". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 98. doi:10.1007/978-3-540-29925-7_1170. ISBN 978-3-540-00238-3.
    3. "Asteroid 1169 Alwine – Nesvorny HCM Asteroid Families V3.0". Small Bodies Data Ferret. Retrieved 26 October 2019.
    4. 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 1 February 2017.{{cite journal}}: CS1 maint: multiple names: authors list (link)
    5. "1169 Alwine (1930 QH)". Minor Planet Center. Retrieved 1 February 2017.
    6. Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). "Identification and Dynamical Properties of Asteroid Families". Asteroids IV. pp. 297–321. arXiv:1502.01628. Bibcode:2015aste.book..297N. doi:10.2458/azu_uapress_9780816532131-ch016. ISBN 9780816532131.
    7. "Absolute Magnitude (H)". NASA/JPL. Archived from the original on 2 March 2001. Retrieved 1 February 2017.
    8. "LCDB Data for (1169) Alwine". Asteroid Lightcurve Database (LCDB). Retrieved 1 February 2017.
    9. Schmadel, Lutz D. (2007). "Appendix 11 – Minor Planet Names with Unknown Meaning". Dictionary of Minor Planet Names – Fifth Revised and Enlarged revision. Springer Berlin Heidelberg. pp. 927–929. ISBN 978-3-540-00238-3.

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