475 Ocllo

475 Ocllo
Discovery[1]
Discovered by	D. Stewart
Discovery date	14 August 1901
Designations
MPC designation	(475) Ocllo
Pronunciation	/ˈɒkloʊ/
Named after	Mama Uqllu, legendary first queen of the Kingdom of Cuzco
Alternative designations	1901 HN; 1959 JS;; 1979 DD
Minor planet category	Mars-crosser
Orbital characteristics
	Epoch 31 July 2016 (JD 2457600.5)
	Uncertainty parameter 0
Observation arc	97.47 yr (35601 d)
Aphelion	3.5821 AU (535.87 Gm)
Perihelion	1.60661 AU (240.345 Gm)
Semi-major axis	2.59436 AU (388.111 Gm)
Eccentricity	0.38073
Orbital period (sidereal)	4.18 yr (1526.3 d)
Mean anomaly	174.037°
Mean motion	0° 14m 9.096s / day
Inclination	18.926°
Longitude of ascending node	34.496°
Argument of perihelion	305.68°
Earth MOID	0.670978 AU (100.3769 Gm)
Mars MOID	0.3173 AU (47.47 Gm)
Physical characteristics
Dimensions	11–25 km
Mass	3.1×1016? kg
Mean density	2.0? g/cm3
Synodic rotation period	7.3151 h (0.30480 d)
Spectral type	X
Absolute magnitude (H)	11.88

Ocllo (minor planet designation: 475 Ocllo) is a large Mars-crossing asteroid.^[2] It was discovered by American astronomer DeLisle Stewart on August 14, 1901 and was assigned a provisional name of 1901 HN.^[5]^[6]

Photometric observations of this asteroid at the Organ Mesa Observatory in Las Cruces, New Mexico during 2010 gave a light curve with a period of 7.3151 ± 0.0002 hours and a brightness variation of 0.66 ± 0.04 in magnitude.^[4]

References[]

^ "The Asteroid Orbital Elements Database". astorb. Lowell Observatory.
^ ^a ^b ^c ^d ^e "JPL Small-Body Database Browser: 475 Ocllo (1901 HN)". Jet Propulsion Laboratory. Retrieved 9 May 2016.
^ "Absolute Magnitude (H)". NASA/JPL. Archived from the original on 2 March 2001. Retrieved 14 June 2015.
^ ^a ^b Pilcher, Frederick (April 2011), "Rotation Period Determinations for 25 Phocaea, 140 Siwa, 149 Medusa 186 Celuta, 475 Ocllo, 574 Reginhild, and 603 Timandra", The Minor Planet Bulletin, 38 (2): 76–78, Bibcode:2011MPBu...38...76P.
^ Pickering, Edward C. (1905). "Positions of (475) Ocllo during 1904". Astronomische Nachrichten. 169 (8–9): 139–142. Bibcode:1905AN....169..139P. doi:10.1002/asna.19051690806. ISSN 0004-6337.
^ Kreutz, H. (1904). "Planet (475) Ocllo". Astronomische Nachrichten. 167 (21): 349–350. doi:10.1002/asna.19041672106. ISSN 0004-6337.

External links[]

475 Ocllo at AstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
475 Ocllo at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

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[lowell-1] "The Asteroid Orbital Elements Database". astorb. Lowell Observatory.

[jpldata-2] "JPL Small-Body Database Browser: 475 Ocllo (1901 HN)". Jet Propulsion Laboratory. Retrieved 9 May 2016.

[h-3] "Absolute Magnitude (H)". NASA/JPL. Archived from the original on 2 March 2001. Retrieved 14 June 2015.

[Pilcher2011-4] Pilcher, Frederick (April 2011), "Rotation Period Determinations for 25 Phocaea, 140 Siwa, 149 Medusa 186 Celuta, 475 Ocllo, 574 Reginhild, and 603 Timandra", The Minor Planet Bulletin, 38 (2): 76–78, Bibcode:2011MPBu...38...76P.

[Pickering1905-5] Pickering, Edward C. (1905). "Positions of (475) Ocllo during 1904". Astronomische Nachrichten. 169 (8–9): 139–142. Bibcode:1905AN....169..139P. doi:10.1002/asna.19051690806. ISSN 0004-6337.

[Kreutz1904-6] Kreutz, H. (1904). "Planet (475) Ocllo". Astronomische Nachrichten. 167 (21): 349–350. doi:10.1002/asna.19041672106. ISSN 0004-6337.

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