3045 Alois

3045 Alois, provisional designation 1984 AW, is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 26 kilometers in diameter. The asteroid was discovered on 8 January 1984, by American astronomer Joe Wagner at Lowell's Anderson Mesa Station in Flagstaff, Arizona, United States.[8] It was named after the discoverer's grandfather Alois Stuczynski.[2]

3045 Alois
Discovery [1]
Discovered byJ. Wagner
Discovery siteAnderson Mesa Stn.
Discovery date8 January 1984
Designations
(3045) Alois
Named after
Alois T. Stuczynski
(discoverer's grandfather)[2]
1984 AW · 1954 QD
1965 QD · 1971 SB3
1982 SY3
main-belt · (outer) [3]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc66.15 yr (24,160 days)
Aphelion3.4822 AU
Perihelion2.7782 AU
3.1302 AU
Eccentricity0.1124
5.54 yr (2,023 days)
120.77°
0° 10m 40.8s / day
Inclination3.3434°
36.206°
330.87°
Physical characteristics
Dimensions23.51±1.58 km[4]
26.64 km (calculated)[3]
27.49±0.20 km[5]
3.7533±0.0058 h[6]
0.057 (assumed)[3]
0.059±0.009[5]
0.095±0.015[4]
X [7] · C [3]
11.40[4] · 11.412±0.001 (R)[6] · 11.50[5] · 11.6[1][3] · 11.91±0.17[7]

    Orbit and classification

    Alois orbits the Sun in the outer main-belt at a distance of 2.8–3.5 AU once every 5 years and 6 months (2,023 days). Its orbit has an eccentricity of 0.11 and an inclination of 3° with respect to the ecliptic.[1] A first precovery was taken at Palomar Observatory in 1951, extending the body's observation arc by 33 years prior to its official discovery observation at Anderson Mesa.[8]

    Physical characteristics

    The C-type body is also classified as an X-type asteroid by Pan-STARRS' large-scale survey.[7]

    Rotation period

    In November 2010, a rotational lightcurve of Alois was obtained from photometric observations made at the Palomar Transient Factory, California. It gave a rotation period of 3.7533±0.0058 hours with a brightness amplitude of 0.18 in magnitude (U=2).[6]

    Diameter and albedo

    According to the space-based surveys by the Japanese Akari satellite and NASA's Wide-field Infrared Survey Explorer, Alois measures 23.5 and 27.5 kilometers in diameter, respectively, and has a corresponding albedo of 0.095 and 0.059.[4][5] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 26.6 kilometers.[3]

    Naming

    This minor planet was named by the discoverer in memory of his grandfather, Alois T. Stuczynski.[2] The official naming citation was published by the Minor Planet Center on 7 March 1985 (M.P.C. 9479).[9]

    References
    1. "JPL Small-Body Database Browser: 3045 Alois (1984 AW)" (2017-03-29 last obs.). Jet Propulsion Laboratory. Retrieved 15 June 2017.
    2. Schmadel, Lutz D. (2007). "(3045) Alois". Dictionary of Minor Planet Names – (3045) Alois. Springer Berlin Heidelberg. p. 251. doi:10.1007/978-3-540-29925-7_3046. ISBN 978-3-540-00238-3.
    3. "LCDB Data for (3045) Alois". Asteroid Lightcurve Database (LCDB). Retrieved 13 May 2016.
    4. 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. (online, AcuA catalog p. 153)
    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 13 May 2016.
    6. Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David; et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal. 150 (3): 35. arXiv:1504.04041. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 13 May 2016.
    7. 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 13 May 2016.
    8. "3045 Alois (1984 AW)". Minor Planet Center. Retrieved 13 May 2016.
    9. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 13 May 2016.

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