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 (also see category).[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 – (1169) Alwine. 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.
    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. 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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