astro.wikisort.org - Asteroid

736 Harvard (prov. designation: A912 WC or 1912 PZ) is a stony background asteroid from the inner regions of the asteroid belt, approximately 17 kilometers (11 miles) in diameter. It was discovered on 16 November 1912, by American astronomer Joel Hastings Metcalf at the Winchester Observatory (799).[1] The bright S-type asteroid has a rotation period of 6.7 hours. It was named after Harvard University in Cambridge, Massachusetts.[2]

736 Harvard

Discovery [1]
Discovered by	J. H. Metcalf
Discovery site	Winchester Obs.
Discovery date	16 November 1912
Designations
MPC designation	(736) Harvard
Named after	Harvard University [2] (Cambridge, Massachusetts)
Alternative designations	A912 WC · 1937 FC 1947 HB · 1912 PZ
Minor planet category	main-belt [1][3] · (inner) background [4][5][6]
Orbital characteristics [3]
Epoch 31 May 2020 (JD 2459000.5)
Uncertainty parameter 0
Observation arc	106.85 yr (39,027 d)
Aphelion	2.5653 AU
Perihelion	1.8382 AU
Semi-major axis	2.2018 AU
Eccentricity	0.1651
Orbital period (sidereal)	3.27 yr (1,193 d)
Mean anomaly	28.744°
Mean motion	0° 18m 6.12s / day
Inclination	4.3767°
Longitude of ascending node	135.91°
Argument of perihelion	200.51°
Physical characteristics
Mean diameter	16.66±0.6 km[7] 17.111±0.125 km[8] 17.92±0.27 km[9]
Synodic rotation period	6.7 h[10][11]
Geometric albedo	0.122±0.004[9] 0.133±0.022[8] 0.1406±0.011[7]
Spectral type	Tholen = S [3] B–V = 0.900±0.020[3] U–B = 0.510±0.020[3]
Absolute magnitude (H)	11.2[1][3] 11.64[7][8][9]

Orbit and classification

Located in the orbital region of the Flora family (402), Harvard is a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements.[4][5][6] It orbits the Sun in the inner asteroid belt at a distance of 1.8–2.6 AU once every 3 years and 3 months (1,193 days; semi-major axis of 2.2 AU). Its orbit has an eccentricity of 0.17 and an inclination of 4° with respect to the ecliptic.[3] The body's observation arc begins at Heidelberg Observatory on 9 December 1912, or three weeks after its official discovery observation by Metcalf at Winchester.[1]

Naming

This minor planet was named in honor of the prestigious Harvard University in Cambridge, Massachusetts, United States. The naming was also mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 74).[2]

Physical characteristics

In the Tholen classification, Harvard is a common, stony S-type asteroid.[3][5]

Rotation period

In 1970s, a rotational lightcurve of Harvard was obtained from photometric observations by Ed Tedesco.[11] Lightcurve analysis gave a well-defined rotation period of 6.7 hours with a brightness variation of 0.32 magnitude (U=3).[10]

Diameter and albedo

According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer (WISE), and the Japanese Akari satellite, Harvard measures (16.66±0.6), (17.111±0.125) and (17.92±0.27) kilometers in diameter and its surface has an albedo of (0.1406±0.011), (0.133±0.022) and (0.122±0.004), respectively.[7][8][9] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.2051 and a diameter of 16.89 kilometers based on an absolute magnitude of 11.2.[10] An asteroid occultation observed on 25 May 2003, gave a best-fit ellipse dimension of (9.0 km × 9.0 km) with a low quality rating of 1.[5] These timed observations are taken when the asteroid passes in front of a distant star.[5]

References

External links

• Lightcurve Database Query (LCDB), at www.minorplanet.info
• Dictionary of Minor Planet Names, Google books
• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
• 736 Harvard at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 736 Harvard at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

На других языках

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[de] (736) Harvard

(736) Harvard ist ein Asteroid des Hauptgürtels, der am 16. November 1912 vom US-amerikanischen Astronomen Joel Hastings Metcalf in Winchester, Massachusetts entdeckt wurde.

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- [en] 736 Harvard

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[es] (736) Harvard

(736) Harvard es un asteroide perteneciente al cinturón de asteroides descubierto por Joel Hastings Metcalf desde Winchester, Estados Unidos, el 16 de noviembre de 1912.

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[ru] (736) Гарвард

(736) Гарвард (лат. Harvard) — крупный астероид Главного пояса, который был открыт 16 ноября 1912 года американским астрономом Джоэлом Меткалфом в американском городе Винчестер (штат Массачусетс, США) и назван в честь Гарвардского университета[1].

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