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1016 Anitra

Asteroid

Summary

Asteroid

Field	Value
minorplanet	yes
name	1016 Anitra
background	#D6D6D6
discovery_ref
discoverer	K. Reinmuth
discovery_site	Heidelberg Obs.
discovered	31 January 1924
mpc_name	(1016) Anitra
alt_names	1924 QG
pronounced
named_after	fictional character
in drama Peer Gynt
mp_category	main-belt(inner)
Flora
orbit_ref
epoch	4 September 2017 (JD 2458000.5)
uncertainty	0
observation_arc	93.42 yr (34,123 days)
aphelion	2.5035 AU
perihelion	1.9356 AU
semimajor	2.2196 AU
eccentricity	0.1279
period	3.31 yr (1,208 days)
mean_anomaly	176.01°
mean_motion	/ day
inclination	6.0352°
asc_node	8.8588°
arg_peri	53.320°
satellites	1
dimensions	km
km
12.97 km (calculated)
rotation	h
h
h
h
5.92951 h
h
h
h
h
h
albedo	0.20 (assumed)

spectral_type	SMASS SS
abs_magnitude	11.811.912.0

in drama Peer Gynt Flora km 12.97 km (calculated) h h h 5.92951 h h h h h h

1016 Anitra, provisional designation , is a stony Florian asteroid and suspected asynchronous binary system from the inner regions of the asteroid belt, approximately 10 kilometers in diameter.

It was discovered on 31 January 1924, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany. The asteroid was likely named after the fictional character Anitra from Henrik Ibsen's drama Peer Gynt.

Orbit and classification

Anitra is a member of the Flora family (402), a giant asteroid family and the largest family of stony asteroids in the main-belt.

It orbits the Sun in the inner main-belt at a distance of 1.9–2.5 AU once every 3 years and 4 months (1,208 days). Its orbit has an eccentricity of 0.13 and an inclination of 6° with respect to the ecliptic. The asteroid's observation arc begins at Heidelberg, 12 days after to its official discovery observation.

Physical characteristics

In the SMASS classification, Anitra is a common, stony S-type asteroid.

Rotation period

In November 2015, a rotational lightcurve of Anitra was obtained from photometric observations by an international collaborations of astronomers who combined their observational results. Lightcurve analysis gave a rotation period of 5.92951 hours with a brightness amplitude of 0.30 magnitude ().

Binary system

Anitra is a suspected asynchronous binary asteroid, a system with a fairly large separation, for which tidal forces have been insufficient to synchronize the periods within the system's lifetime. The likely minor-planet moon has a rotation period of 2.609 hours and is thought to orbit its primary every 240 hours. The results, however, are still tentative. More than 100 known binaries from the asteroid belt have already been discovered.

Diameter and albedo

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Anitra measures 9.539 and 10.302 kilometers in diameter and its surface has an albedo of 0.2728 and 0.308, respectively.

The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony S-type asteroids of 0.20 and calculates a diameter of 12.97 kilometers based on an absolute magnitude of 11.8.

Naming

This minor planet was probably named after the Arabian dancer Anitra, daughter of a Bedouin chief in Henrik Ibsen's drama Peer Gynt, a five-act play in verse. The music was composed by Edvard Grieg who named one piece "Anitra's Dance". The minor planets and are named after Grieg and Ibsen, respectively.

The official naming citation is based on research by Lutz Schmadel and feedback from astronomers R. Bremer and I. van Houten-Groeneveld.

Notes

References

Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

flora-asteroids baptistina-asteroids discoveries-by-karl-wilhelm-reinmuth named-minor-planets peer-gynt binary-asteroids s-type-asteroids-(smass) astronomical-objects-discovered-in-1924

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