8187 Akiramisawa

8187 Akiramisawa
	Akiramisawa modeled from its lightcurve
Discovery
Discovered by	S. Otomo
Discovery site	Kiyosato Obs. (894)
Discovery date	15 December 1992
Designations
MPC designation	(8187) Akiramisawa
Named after	Akira Misawa; (Japanese botanist)
Alternative designations	1992 XL · 1971 UF4; 1971 VV
Minor planet category	main-belt · (outer) ; Eos
Orbital characteristics
	Epoch 4 September 2017 (JD 2458000.5)
	Uncertainty parameter 0
Observation arc	44.79 yr (16,358 days)
Aphelion	3.3523 AUえーゆー
Perihelion	2.6219 AUえーゆー
Semi-major axis	2.9871 AUえーゆー
Eccentricity	0.1223
Orbital period (sidereal)	5.16 yr (1,886 days)
Mean anomaly	351.90°
Mean motion	0° 11m 27.24s / day
Inclination	11.608°
Longitude of ascending node	83.066°
Argument of perihelion	277.60°
Physical characteristics
Mean diameter	11.86 km (calculated)
Synodic rotation period	5.8153±0.0015 h
Geometric albedo	0.057 (assumed)
Spectral type	C (assumed)
Absolute magnitude (H)	12.8 · 13.45±0.27 · 12.908±0.007 (R) · 13.36

8187 Akiramisawa, provisional designation 1992 XL, is an Eos asteroid from the outer region of the asteroid belt. It was discovered by Japanese astronomer Satoru Otomo at Kiyosato Observatory (894) on 15 December 1992.^[1] The assumed C-type asteroid has a rotation period of 5.8 hours and measures approximately 12 kilometers (7.5 miles) in diameter. It was named after Japanese botanist Akira Misawa (1942–1994).^[3]

Orbit and classification

Akiramisawa is a member the Eos family (606),^[5] the largest asteroid family of the outer main belt consisting of nearly 10,000 known members.^[8]^: 23 It orbits the Sun in the outer asteroid belt at a distance of 2.6–3.4 AUえーゆー once every 5 years and 2 months (1,886 days). Its orbit has an eccentricity of 0.12 and an inclination of 12° with respect to the ecliptic.^[2] In October 1971, it was first identified as 1971 UF₄ at the Chilean Cerro El Roble Station, extending the body's observation arc by 21 years prior to its official discovery observation at Kiyosato.^[1]

Naming

This minor planet was named in honour of Japanese botanist Akira Misawa (1942–1994), a professor at Chiba University, who examined the effects of light pollution on plants.^[3] The official naming citation was published by the Minor Planet Center on 9 January 2001 (M.P.C. 41935).^[9]

Physical characteristics

A rotational lightcurve of Akiramisawa was obtained from photometric observations made at the Palomar Transient Factory in June 2010. Lightcurve analysis gave a rotation period of 5.8153±0.0015 hours with a high brightness amplitude of 0.90 magnitude (U=2).^[6] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057, and calculates a diameter of 11.9 kilometers with an absolute magnitude of 13.36.^[2]

References

^ ^a ^b ^c ^d "8187 Akiramisawa (1992 XL)". Minor Planet Center. Retrieved 4 May 2016.
^ ^a ^b ^c ^d ^e ^f "JPL Small-Body Database Browser: 8187 Akiramisawa (1992 XL)" (2016-08-04 last obs.). Jet Propulsion Laboratory. Retrieved 22 June 2017.
^ ^a ^b ^c Schmadel, Lutz D. (2007). "(8187) Akiramisawa". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 637. doi:10.1007/978-3-540-29925-7_6888. ISBN 978-3-540-00238-3.
^ ^a ^b ^c ^d ^e "LCDB Data for (8187) Akiramisawa". Asteroid Lightcurve Database (LCDB). Retrieved 4 May 2016.
^ ^a ^b "Asteroid 8187 Akiramisawa – Nesvorny HCM Asteroid Families V3.0". Small Bodies Data Ferret. Retrieved 27 October 2019.
^ ^a ^b ^c 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 4 May 2016.
^ 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 4 May 2016.
^ 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.
^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 4 May 2016.

External links

Lightcurve Database Query (LCDB), at www.minorplanet.info
Dictionary of Minor Planet Names, Google books
Asteroids and comets rotation curves, CdR – Geneva Observatory, Raoul Behrend
Discovery Circumstances: Numbered Minor Planets (5001)-(10000) – Minor Planet Center
8187 Akiramisawa at AstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
8187 Akiramisawa at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters

[MPC-object-1] "8187 Akiramisawa (1992 XL)". Minor Planet Center. Retrieved 4 May 2016.

[jpldata-2] ^ ^a ^b ^c ^d ^e ^f "JPL Small-Body Database Browser: 8187 Akiramisawa (1992 XL)" (2016-08-04 last obs.). Jet Propulsion Laboratory. Retrieved 22 June 2017.

[springer-3] Schmadel, Lutz D. (2007). "(8187) Akiramisawa". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 637. doi:10.1007/978-3-540-29925-7_6888. ISBN 978-3-540-00238-3.

[lcdb-4] "LCDB Data for (8187) Akiramisawa". Asteroid Lightcurve Database (LCDB). Retrieved 4 May 2016.

[Ferret-5] "Asteroid 8187 Akiramisawa – Nesvorny HCM Asteroid Families V3.0". Small Bodies Data Ferret. Retrieved 27 October 2019.

[Waszczak-2015-6] 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 4 May 2016.

[Veres-2015-7] 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 4 May 2016.

[Nesvorny-2014-8] 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.

[MPC-Circulars-Archive-9] "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 4 May 2016.

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