astro.wikisort.org - Asteroid

3099 Hergenrother, provisional designation 1940 GF, is an asteroid from the outer region of the asteroid belt, approximately 15 kilometers in diameter. It was discovered on 3 April 1940, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland,[7] and named after American astronomer Carl Hergenrother in 1996.[2]

3099 Hergenrother

Discovery [1]
Discovered by	Y. Väisälä
Discovery site	Turku Obs.
Discovery date	3 April 1940
Designations
MPC designation	(3099) Hergenrother
Named after	Carl Hergenrother (American astronomer)[2]
Alternative designations	1940 GF · 1969 EF1 1972 VV · 1979 KE 1980 NT · 1984 HB 1984 JG
Minor planet category	main-belt · (outer) [3]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc	76.96 yr (28,111 days)
Aphelion	3.4563 AU
Perihelion	2.3048 AU
Semi-major axis	2.8805 AU
Eccentricity	0.1999
Orbital period (sidereal)	4.89 yr (1,786 days)
Mean anomaly	309.42°
Mean motion	0° 12m 5.76s / day
Inclination	15.496°
Longitude of ascending node	31.100°
Argument of perihelion	148.52°
Physical characteristics
Dimensions	14.732±0.110 km[4][5] 29.21 km (calculated)[3]
Synodic rotation period	24.266±0.007 h[6]
Geometric albedo	0.057 (assumed)[3] 0.224±0.016[4][5]
Spectral type	C [3]
Absolute magnitude (H)	11.4[1][3][4]

Orbit and classification

Hergenrother orbits the Sun in the outer main-belt at a distance of 2.3–3.5 AU once every 4 years and 11 months (1,786 days). Its orbit has an eccentricity of 0.20 and an inclination of 15° with respect to the ecliptic.[1] The body's observation arc begins 6 days after its official discovery observation at Turku.[7]

Physical characteristics

Rotation period

In January 2008, a rotational lightcurve of Hergenrother was obtained from photometric observations by French amateur astronomer Pierre Antonini. Lightcurve analysis gave a rotation period of 24.266 hours with a brightness variation of 0.28 magnitude (U=2).[6]

Diameter and albedo

According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Hergenrother measures 14.73 kilometers in diameter and its surface has an albedo of 0.224,[4][5] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and consequently calculates a diameter of 29.21 kilometers, as the lower the albedo, the larger the body's diameter at a certain absolute magnitude.[3]

Naming

This minor planet was named in honor of American astronomer Carl W. Hergenrother (born 1973). At Lunar and Planetary Laboratory, he has been a discoverer of minor planets with high inclinations during the Bigelow Sky Survey, precursor to the Catalina Sky Survey. The naming was proposed by MPC director Brian G. Marsden among others.[2] The official naming citation was published by the Minor Planet Center on 3 May 1996 (M.P.C. 27124).[8]

References

External links

• Get to Know a Staff Scientist: Carl Hergenrother, Lunar & Planetary Laboratory, University of Arizona
• Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
• Dictionary of Minor Planet Names, Google books
• Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
• 3099 Hergenrother at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 3099 Hergenrother at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

На других языках

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[de] (3099) Hergenrother

(3099) Hergenrother ist ein Asteroid des Hauptgürtels, der am 3. April 1940 von dem finnischen Astronomen Yrjö Väisälä in Turku entdeckt wurde.

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- [en] 3099 Hergenrother

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