1434 Margot

1434 Margot, provisional designation 1936 FD₁, is a stony Eoan asteroid from the outer regions of the asteroid belt, approximately 29 kilometers in diameter. It was discovered on 19 March 1936, by Soviet astronomer Grigory Neujmin at the Simeiz Observatory on the Crimean peninsula.^[12] The asteroid was named after Gertrud Margot Görsdorf, a friend of German astronomer of Wilhelm Gliese.^[2]

1434 Margot

Discovery[1]
Discovered by	G. Neujmin
Discovery site	Simeiz Obs.
Discovery date	19 March 1936
Designations
MPC designation	(1434) Margot
Named after	Gertrud Margot Görsdorf[2] (friend of Wilhelm Gliese)
Alternative designations	1936 FD1 · 1931 GM 1931 HA · 1938 RD 1938 UN · 1988 DU A906 QA · A922 SD
Minor planet category	main-belt · (outer) Eos[3][4]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc	111.11 yr (40,582 days)
Aphelion	3.2158 AU
Perihelion	2.8217 AU
Semi-major axis	3.0187 AU
Eccentricity	0.0653
Orbital period (sidereal)	5.24 yr (1,916 days)
Mean anomaly	86.589°
Mean motion	0° 11m 16.44s / day
Inclination	10.832°
Longitude of ascending node	152.42°
Argument of perihelion	147.81°
Physical characteristics
Dimensions	27.178±0.303 km[5] 27.20±1.75 km[6] 28.052±0.039 km[7] 29.49 km (derived)[3] 29.65±1.4 km[8] 30.84±0.62 km[9]
Synodic rotation period	8.17 h[10]
Geometric albedo	0.1106 (derived)[3] 0.117±0.249[6] 0.1242±0.0101[7] 0.130±0.023[5] 0.132±0.006[9] 0.1353±0.013[8]
Spectral type	Tholen = S[1][3] · S[11] B–V = 0.809[1] U–B = 0.404[1]
Absolute magnitude (H)	10.43[1][9][8] · 10.49±0.05[11] · 10.66[10][7][3] · 10.77[6]

Orbit and classification

Margot is a member the Eos family (606),^[3][4] the largest asteroid family of the outer asteroid belt consisting of nearly 10,000 asteroids.^[13]: 23 It orbits the Sun at a distance of 2.8–3.2 AU once every 5 years and 3 months (1,916 days). Its orbit has an eccentricity of 0.07 and an inclination of 11° with respect to the ecliptic.^[1]

The body's observation arc begins at Vienna Observatory in August 1906, when it was first identified as A922 SD, almost 30 years prior to its official discovery observation at Simeiz.^[12]

Physical characteristics

In the Tholen classification, Margot is a common S-type asteroid.^[1][3] Pan-STARRS photometric survey also characterizes it as a stony S-type,^[11] while the overall spectral type for Eoan asteroids is that of a K-type.^[13]: 23

Rotation period

In June 1984, a rotational lightcurve of Margot was obtained from photometric observations by American astronomer Richard Binzel . Lightcurve analysis gave a well-defined rotation period of 8.17 hours with a brightness amplitude of 0.52 magnitude, indicative of a somewhat elongated shape (U=3).^[10]

Diameter and albedo

According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Margot measures between 27.178 and 30.84 kilometers in diameter and its surface has an albedo between 0.117 and 0.1353.^{[5][6][7][8][9]}

The Collaborative Asteroid Lightcurve Link derives an albedo of 0.1106 and a diameter of 29.49 kilometers based on an absolute magnitude of 10.66.^[3]

Naming

This minor planet was named by German astronomer Wilhelm Gliese after Gertrud Margot Zottmann (1915–1990; née Görsdorf), his friend and schoolfellow for several years at Berlin. Gliese, after whom the asteroid (1823) is named, is best known for the Gliese Catalogue of Nearby Stars, which is itself the source of name for many discovered exoplanets.^[2] The discovery circumstances and naming were researched by Lutz Schmadel, the author of the Dictionary of Minor Planet Names.^[2]