From Surf Wiki (app.surf) — the open knowledge base

4827 Dares

Trojan asteroid

Field	Value
minorplanet	yes
name	4827 Dares
background	#C2FFFF
discovery_ref
discoverer	C. Shoemaker
discovery_site	Palomar Obs.
discovered	17 August 1988
mpc_name	(4827) Dares
alt_names	1988 QE
adjective	Daretian
pronounced
named_after	Dares (Greek mythology)
mp_category	Jupiter trojan
Trojanbackground
orbit_ref
epoch	23 March 2018 (JD 2458200.5)
uncertainty	0
observation_arc	63.49 yr (23,191 d)
aphelion	5.3517 AU
perihelion	4.8903 AU
semimajor	5.1210 AU
eccentricity	0.0451
period	11.59 yr (4,233 d)
mean_anomaly	119.05°
mean_motion	/ day
inclination	7.7056°
asc_node	242.04°
arg_peri	170.69°
jupiter_moid	0.0037 AU
tisserand	2.9800
mean_diameter
(calculated)
rotation
albedo	(assumed)

spectral_type	D (Pan-STARRS)
D (SDSS-MOC)
abs_magnitude	10.4
10.5

Trojanbackground (calculated)

D (SDSS-MOC) 10.5

4827 Dares is a larger Jupiter trojan from the Trojan camp, approximately 43 km in diameter. It was discovered on 17 August 1988 by American astronomer Carolyn Shoemaker at the Palomar Observatory in California. The dark D-type asteroid has a rotation period of 19.0 hours. It was named after Dares from Greek mythology.

Orbit and classification

Dares is a dark Jovian asteroid in a 1:1 orbital resonance with Jupiter. It is located in the trailering Trojan camp at the Gas Giant's Lagrangian point, 60° behind on its orbit . It is also a non-family asteroid of the Jovian background population. It orbits the Sun at a distance of 4.9–5.4 AU once every 11 years and 7 months (4,233 days; semi-major axis of 5.12 AU). Its orbit has an eccentricity of 0.05 and an inclination of 8° with respect to the ecliptic.

The body's observation arc begins with a precovery at Palomar in November 1954, almost 34 years prior to its official discovery observation.

Physical characteristics

In the SDSS-based taxonomy, Dares is a dark D-type asteroid. It is also characterized as a D-type by Pan-STARRS' survey.

Rotation period

In February 1994, a rotational lightcurve of Dares was obtained over five nights of observation by Stefano Mottola and Anders Erikson using the ESO 1-metre telescope at La Silla Observatory in Chile. Lightcurve analysis showed a well-defined rotation period of hours with a brightness variation of 0.24 magnitude ().

In October 2013, photometric observations in the R-band by astronomers at the Palomar Transient Factory in California gave a concurring period of 18.967 hours with an amplitude of 0.23 magnitude ().

Diameter and albedo

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Dares measures 42.77 kilometers in diameter and its surface has an albedo of 0.067, while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for a carbonaceous asteroid of 0.057 and calculates a diameter of 44.22 kilometers based on an absolute magnitude of 10.5.

Naming

This minor planet was named by the discoverer from Greek mythology after the Trojan Dares, one of Aeneas' wandering companions (Aeneads) who were not killed or enslaved by the end of the Trojan War. The official naming citation was published by the Minor Planet Center on 25 August 1991 (M.P.C. 18647).

References

Noah Webster (1884) ''A Practical Dictionary of the English Language''

Info: 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.

jupiter-trojans-(trojan-camp) discoveries-by-carolyn-s.-shoemaker named-minor-planets astronomical-objects-discovered-in-1988

Want to explore this topic further?

Ask Mako anything about 4827 Dares — get instant answers, deeper analysis, and related topics.

Research with Mako

Free with your Surf account

Content sourced from Wikipedia, available under CC BY-SA 4.0.

This content may have been generated or modified by AI. CloudSurf Software LLC is not responsible for the accuracy, completeness, or reliability of AI-generated content. Always verify important information from primary sources.

Report