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1070 Tunica

Dark background asteroid

Summary

Dark background asteroid

Field	Value
minorplanet	yes
name	1070 Tunica
background	#D6D6D6
discovery_ref
discoverer	K. Reinmuth
discovery_site	Heidelberg Obs.
discovered	1 September 1926
mpc_name	(1070) Tunica
alt_names	1926 RBA903 SA
pronounced
named_after	Petrorhagia
(flowering plant)
mp_category	main-belt(outer)
backgroundUrsula
orbit_ref
epoch	4 September 2017 (JD 2458000.5)
uncertainty	0
observation_arc	114.03 yr (41,649 days)
aphelion	3.4882 AU
perihelion	2.9764 AU
semimajor	3.2323 AU
eccentricity	0.0792
period	5.81 yr (2,123 days)
mean_anomaly	259.51°
mean_motion	/ day
inclination	16.963°
asc_node	165.32°
arg_peri	189.81°
dimensions	km
33.79 km (calculated)
km
km
km
km
rotation	h
h
albedo
0.057 (assumed)

spectral_type	C (assumed)
abs_magnitude	10.60 (R)10.7010.811.08

(flowering plant) backgroundUrsula 33.79 km (calculated) km km km km h 0.057 (assumed)

1070 Tunica, provisional designation , is a dark background asteroid from the outer regions of the asteroid belt, approximately 35 kilometers in diameter. It was discovered on 1 September 1926, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany. The asteroid was named after Petrorhagia, a flowering plant also known as "Tunica".

Orbit and classification

Tunica is a non-family asteroid from the main belt's background population. Conversely, it has also been considered a core member of the Ursula family. It orbits the Sun in the outer main-belt at a distance of 3.0–3.5 AU once every 5 years and 10 months (2,123 days; semi-major axis of 3.23 AU). Its orbit has an eccentricity of 0.08 and an inclination of 17° with respect to the ecliptic.

The body's observation arc begins with its identification as at Heidelberg in September 1903, or 23 years prior to its official discovery observation.

Physical characteristics

Tunica is an assumed C-type asteroid.

Rotation period

In May 2017, a rotational lightcurve of Tunica was obtained from photometric observations by French amateur astronomer René Roy. Lightcurve analysis gave a rotation period of 15.8 hours with a brightness variation of 0.24 magnitude (). Another lightcurve obtained in the R-band by astronomers at the Palomar Transient Factory in February 2010 gave a period of 15.673 hours and an amplitude of 0.32 magnitude ().

Diameter and albedo

According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Tunica measures between 33.77 and 44.135 kilometers in diameter and its surface has an albedo between 0.0476 and 0.076.

The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 33.79 kilometers based on an absolute magnitude of 11.08.

Naming

This minor planet was named after "Tunica" (Petrorhagia), a flowering plant derived from the common gillyflower.

Reinmuth's flowers

Due to his many discoveries, Karl Reinmuth submitted a large list of 66 newly named asteroids in the early 1930s. The list covered his discoveries with numbers between and . This list also contained a sequence of 28 asteroids, starting with 1054 Forsytia, that were all named after plants, in particular flowering plants (also see list of minor planets named after animals and plants).

References

{{OED. tunica

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.

background-asteroids discoveries-by-karl-wilhelm-reinmuth named-minor-planets astronomical-objects-discovered-in-1926

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