2500 Alascattalo

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2500 Alascattalo
Discovery  [1]
Discovered by K. Reinmuth
Discovery site Heidelberg Obs.
Discovery date2 April 1926
Designations
(2500) Alascattalo
Named after
Alascattalo
(mythological creature) [2]
1926 GC ·1927 TA
1946 FB ·1981 VD
main-belt  · Flora   [3]
Orbital characteristics   [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 91.18 yr (33,303 days)
Aphelion 2.4620 AU
Perihelion 2.0184 AU
2.2402 AU
Eccentricity 0.0990
3.35 yr (1,225 days)
78.867°
0° 17m 38.4s / day
Inclination 6.9899°
48.004°
160.51°
Physical characteristics
Dimensions7.481±0.132 km [4]
7.947±0.037 km [5]
8.19 km (calculated) [3]
2.751±0.002 h [6]
2.754±0.007 h [7]
0.2138±0.0580 [5]
0.24 (assumed) [3]
0.257±0.013 [4]
S   [3]
12.6 [1] [3]  ·12.8 [5]  ·12.94±0.30 [8]

    2500 Alascattalo, provisional designation 1926 GC, is a stony Flora asteroid from the inner regions of the asteroid belt, approximately 8 kilometers in diameter.

    Contents

    The asteroid was discovered on 2 April 1926, by German astronomer Karl Reinmuth at Heidelberg Observatory in southern Germany. [9] It was later named for the fictional moose–walrus Alascattalo creature. [2]

    Orbit and classification

    Alascattalo is a member of the Flora family, one of the largest groups of stony asteroids in the main-belt. It orbits the Sun in the inner main-belt at a distance of 2.0–2.5  AU once every 3 years and 4 months (1,225 days). Its orbit has an eccentricity of 0.10 and an inclination of 7° with respect to the ecliptic. [1] No precoveries were obtained prior to its discovery. [9]

    Physical characteristics

    Alascattalo has been characterized as a common, stony S-type asteroid. [3]

    Rotation period

    A rotational lightcurve of this asteroid was obtained from photometric observations made by Junda Liu at the Lvye Observatory ( P34 ), China, and at the iTelescope Observatory ( Q62 ), at the Siding Spring Observatory site, Australia, in December 2015. The lightcurve gave a well-defined rotation period of 2.751 hours with a brightness variation of 0.19 in magnitude ( U=3- ). [6]

    A previous lightcurve with a concurring period of 2.754 hours and a similar amplitude of 0.15 was already obtained by French amateur astronomer Pierre Antonini in March 2013 ( U=2 ). [7]

    Diameter and albedo

    According to the survey carried out by the NEOWISE mission of NASA's space-based Wide-field Infrared Survey Explorer, Alascattalo measures 7.5 and 7.9 kilometers in diameter and its surface has an albedo of 0.21 and 0.27, respectively, [4] [5] while the Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – which derives from 8 Flora, the largest member and namesake of this orbital family – and calculates a diameter of 8.2 kilometers with an absolute magnitude of 12.6. [3]

    Naming

    This minor planet was named after the mythological creature "Alascattalo", a fictional chimera between a moose and a walrus. [2]

    According to legend, it was genetically bred by miners during the Klondike Gold Rush in the late 19th century. The alascattalo also stands for the local people's unique sense of humor, dealing with tourists who ask naive questions, and is the mascot of the four-minute long, annual parade on "Alascattalo Day" held in November. [2] The official naming citation was published by the Minor Planet Center on 21 November 1991 ( M.P.C. 19332). [10]

    Related Research Articles

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    <span class="mw-page-title-main">2839 Annette</span> Flora family asteroid

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    <span class="mw-page-title-main">1274 Delportia</span>

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    1184 Gaea, provisional designation 1926 RE, is an Aerian asteroid from the central regions of the asteroid belt, approximately 20 kilometers in diameter. It was discovered on 5 September 1926, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany. The asteroid was named after the goddess of Earth, Gaea (Gaia), from Greek mythology.

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    1990 Pilcher, provisional designation 1956 EE, is a stony background asteroid from the Florian region of the inner asteroid belt, approximately 7 kilometers in diameter. It was discovered on 9 March 1956, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in Heidelberg, Germany. In 1982, it was named by the MPC for American physicist and photometrist Frederick Pilcher. The S-type asteroid has a short rotation period of 2.8 hours.

    <span class="mw-page-title-main">1854 Skvortsov</span> Asteroid

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    1807 Slovakia, provisional designation 1971 QA, is a stony asteroid and slow rotator from the inner regions of the asteroid belt, approximately 9 kilometers in diameter. It was discovered on 20 August 1971, by Slovak astronomer Milan Antal at Skalnaté pleso Observatory in the High Tatras mountains of Slovakia and named after the Slovak Republic.

    1530 Rantaseppä, provisional designation 1938 SG, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 5 kilometers in diameter. Discovered by Yrjö Väisälä at Turku Observatory in 1938, it was later named after Finnish astronomer Hilkka Rantaseppä-Helenius.

    References

    1. 1 2 3 4 "JPL Small-Body Database Browser: 2500 Alascattalo (1926 GC)" (2017-06-06 last obs.). Jet Propulsion Laboratory . Retrieved 13 June 2017.
    2. 1 2 3 4 Schmadel, Lutz D. (2007). "(2500) Alascattalo". Dictionary of Minor Planet Names – (2500) Alascattalo. Springer Berlin Heidelberg. p. 204. doi:10.1007/978-3-540-29925-7_2501. ISBN   978-3-540-00238-3.
    3. 1 2 3 4 5 6 7 "LCDB Data for (2500) Alascattalo". Asteroid Lightcurve Database (LCDB). Retrieved 7 May 2016.
    4. 1 2 3 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 . Retrieved 6 December 2016.
    5. 1 2 3 4 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 . Retrieved 7 May 2016.
    6. 1 2 Liu, Junda (April 2016). "Rotation Period Analysis for 2500 Alascattalo". The Minor Planet Bulletin. 43 (2): 111–112. Bibcode:2016MPBu...43..111L. ISSN   1052-8091 . Retrieved 7 May 2016.
    7. 1 2 Behrend, Raoul. "Asteroids and comets rotation curves – (2500) Alascattalo". Geneva Observatory . Retrieved 7 May 2016.
    8. ↑ 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 7 May 2016.
    9. 1 2 "2500 Alascattalo (1926 GC)". Minor Planet Center. Retrieved 7 May 2016.
    10. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 7 May 2016.
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