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1877 Marsden, provisional designation 1971 FC, is a carbonaceous Hildian asteroid from the outermost region of the asteroid belt, approximately 35 kilometers in diameter. It was discovered during the Palomar–Leiden Trojan survey in 1971, and named after British astronomer Brian Marsden.[2]

1877 Marsden

Discovery[1]
Discovered by	C. J. van Houten I. van Houten-G. T. Gehrels
Discovery site	Palomar Obs.
Discovery date	24 March 1971
Designations
MPC designation	(1877) Marsden
Named after	Brian G. Marsden (British astronomer)[2]
Alternative designations	1971 FC · 1950 TG 1950 TT2
Minor planet category	main-belt · Hilda[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc	66.57 yr (24,315 days)
Aphelion	4.7626 AU
Perihelion	3.1251 AU
Semi-major axis	3.9439 AU
Eccentricity	0.2076
Orbital period (sidereal)	7.83 yr (2,861 days)
Mean anomaly	244.81°
Inclination	17.551°
Longitude of ascending node	352.86°
Argument of perihelion	306.87°
TJupiter	2.9430
Physical characteristics
Dimensions	34.01 km (derived)[4] 35.27±1.78 km[5] 35.643±0.298 km[6]
Synodic rotation period	14.4 h[7]
Geometric albedo	0.057 (assumed)[4] 0.07±0.01[6] 0.082±0.009[5]
Spectral type	D[6] · C[4]
Absolute magnitude (H)	10.70[5] · 10.9[1] · 11.07[4][7]

Discovery

Marsden was discovered on 24 March 1971, by Dutch astronomer couple Ingrid and Cornelis van Houten at Leiden, on photographic plates taken by Dutch–American astronomer Tom Gehrels at Palomar Observatory, California.[3]

The discovery was made in a survey of faint Trojans (in spite of not having received a typical T-1 designation).[1] The trio of Dutch and Dutch–American astronomers collaborated on the productive Palomar–Leiden survey in the 1960s, using the same procedure as for this smaller Trojan campaign: Gehrels used Palomar's Samuel Oschin telescope (also known as the 48-inch Schmidt Telescope), and shipped the photographic plates to Cornelis and Ingrid van Houten at Leiden Observatory where blinking and astrometry was carried out.

Orbit and classification

Marsden is a member of the Hilda family.[6] It orbits the Sun in the outermost main-belt at a distance of 3.1–4.8 AU once every 7 years and 10 months (2,861 days). Its orbit has an eccentricity of 0.21 and an inclination of 18° with respect to the ecliptic.[1]

Physical characteristics

This trojan asteroid has been characterized as a dark C-type and D-type asteroid.[4][6]

Rotation period

During a photometric survey of Hilda asteroids in the late 1990s, an obtained light curve for Marsden gave a rotation period of 14.4 hours with a brightness variation of 0.22 in magnitude (U=2).[7]

Diameter and albedo

According to the surveys carried out by the Japanese Akari satellite and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Marsden measures 35.27 and 35.643 kilometers in diameter and its surface has an albedo of 0.082 and 0.07, respectively.[5][6] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and derives a diameter of 34.01 kilometers with an absolute magnitude of 11.07.[4]

Naming

This minor planet was named in honor of British astronomer Brian Marsden (1937–2010), director of the Minor Planet Center (MPC) at the Harvard–Smithsonian Center for Astrophysics, in recognition of his numerous contributions in the field of orbit calculations for comets and minor planets.[2] The official naming citation was published by the Minor Planet Center on 1 June 1975 (M.P.C. 3826).[8]

References

External links

• 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
• 1877 Marsden at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 1877 Marsden at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

На других языках

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[de] (1877) Marsden

(1877) Marsden ist ein Asteroid des äußeren Hauptgürtels. Am 24. März 1971 entdeckten ihn C. J. van Houten und I. van Houten-Groeneveld an der Universität Leiden auf Aufnahmen eines 1,22-m-Schmidt-Teleskops, die von T. Gehrels am Mount Palomar-Observatorium in Kalifornien im Rahmen einer Untersuchung lichtschwacher Trojaner gemacht worden waren. Nachträglich konnte der Asteroid bereits auf Aufnahmen nachgewiesen werden, die 1950 an der Landessternwarte Heidelberg-Königstuhl und am Goethe-Link-Observatorium in Indiana, sowie 1953 und 1955 ebenfalls am Mount Palomar-Observatorium gemacht worden waren.

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- [en] 1877 Marsden

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[es] (1877) Marsden

(1877) Marsden es un asteroide perteneciente al cinturón exterior de asteroides descubierto por Tom Gehrels el 24 de marzo de 1971 desde el observatorio del Monte Palomar, Estados Unidos.

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