3581 Alvarez

Alvarez
Discovery
Discovered by	Shoemaker, C. and Shoemaker, E.
Discovery site	Palomar
Discovery date	23 April 1985
Designations
MPC designation	(3581) Alvarez
Alternative designations	1985 HC
Orbital characteristics[1]
	Epoch 13 January 2016 (JD 2457400.5)
	Uncertainty parameter 0
Observation arc	19674 days (53.86 yr)
Aphelion	3.9051003 AU (584.19469 Gm)
Perihelion	1.6456876 AU (246.19136 Gm)
Semi-major axis	2.775394 AU (415.1930 Gm)
Eccentricity	0.4070436
Orbital period	4.62 yr (1688.8 d)
Mean anomaly	183.71561°
Mean motion	0° 12m 47.396s / day
Inclination	28.79773°
Longitude of ascending node	217.59491°
Argument of perihelion	107.42112°
Physical characteristics
Dimensions	~14km
Rotation period	33.42 h (1.393 d)[1][2]
Spectral type	B [1]
Absolute magnitude (H)	12.2[1]

3581 Alvarez (1985 HC) is a Mars-crossing asteroid discovered on April 23, 1985, by Shoemaker, C. and Shoemaker, E. at Palomar.^[1] Based upon lightcurve data, it has a synodic rotation period of 7001334200000000000♠33.42±0.02 hours with an amplitude variation of 6998600000000000000♠0.06±0.02 in magnitude.^[2] With a diameter of ~14 km, it is one of the largest Mars-crossing asteroids. However, due to the high inclination of its orbit, it never actually passes through the orbit of Mars since at perihelion it is well away from the plane of Mars' orbit.^[3] The asteroid is named after planetary scientist Walter Alvarez and his Nobel-prize winning father, physicist Luis Alvarez.^[4]

References

1 2 3 4 5 "JPL Small-Body Database Browser: 3581 Alvarez". Jet Propulsion Laboratory. Retrieved 14 April 2016.
1 2 Koff, Robert A. (June 2005), "Lightcurve photometry of asteroids 212 Medea, 517 Edith, 3581 Alvarez 5682 Beresford, and 5817 Robertfrazer", The Minor Planet Bulletin, 32 (2): 32–34, Bibcode:2005MPBu...32...32K.
↑ de Leon, Julia; et al. (October 2010), "Origin Of The Near-earth Asteroid Phaethon And The Geminids Meteor Shower", Bulletin of the American Astronomical Society, 42: 1058, Bibcode:2010DPS....42.1327D, doi:10.1051/0004-6361/200913609.
↑ Glen, William (1988), "Alvarez receives Astral Tribute", Eos, Transactions American Geophysical Union, 69 (52): 1688–1688, Bibcode:1988EOSTr..69.1688G, doi:10.1029/88EO01266.

External links

Lightcurve plot of (3581) Alvarez, Antelope Hills Observatory
3581 Alvarez at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

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[jpldata-1] 1 2 3 4 5 "JPL Small-Body Database Browser: 3581 Alvarez". Jet Propulsion Laboratory. Retrieved 14 April 2016.

[Koff2005-2] 1 2 Koff, Robert A. (June 2005), "Lightcurve photometry of asteroids 212 Medea, 517 Edith, 3581 Alvarez 5682 Beresford, and 5817 Robertfrazer", The Minor Planet Bulletin, 32 (2): 32–34, Bibcode:2005MPBu...32...32K.

[baas42_1058-3] Leon, Julia; et al. (October 2010), "Origin Of The Near-earth Asteroid Phaethon And The Geminids Meteor Shower", Bulletin of the American Astronomical Society, 42: 1058, Bibcode:2010DPS....42.1327D, doi:10.1051/0004-6361/200913609.

[Glen1988-4] Glen, William (1988), "Alvarez receives Astral Tribute", Eos, Transactions American Geophysical Union, 69 (52): 1688–1688, Bibcode:1988EOSTr..69.1688G, doi:10.1029/88EO01266.