astro.wikisort.org - Asteroid

(369623) 2011 DY₅, provisional designation 2011 DY₅, is a Tirela asteroid from the outer regions of the asteroid belt, approximately 3.2 kilometers (2.0 miles) in diameter. It was discovered on 30 August 2008, by French amateur astronomers Christophe Demeautis and Jean-Marie Lopez at the Pises Observatory in southern France.[4]

(369623) 2011 DY₅

Discovery[1]
Discovered by	C. Demeautis Jean-Marie Lopez
Discovery site	Pises Obs.
Discovery date	30 August 2008
Designations
MPC designation	(369623) 2011 DY5
Alternative designations	2011 DY5 · 2008 QZ41
Minor planet category	main-belt · (outer) Tirela[2]
Orbital characteristics[1]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc	8.67 yr (3,168 d)
Aphelion	3.6022 AU
Perihelion	2.6289 AU
Semi-major axis	3.1155 AU
Eccentricity	0.1562
Orbital period (sidereal)	5.50 yr (2,009 d)
Mean anomaly	108.05°
Mean motion	0° 10m 45.12s / day
Inclination	17.608°
Longitude of ascending node	168.34°
Argument of perihelion	340.61°
Physical characteristics
Mean diameter	3.2 km (est. at 0.07)[3]
Absolute magnitude (H)	16.0[1] · 16.1[4]

Orbit and classification

2011 DY₅ is a member of the Tirela family,[2] a large asteroid family, also known as the Klumpkea family, named after the largest members 1040 Klumpkea and 1400 Tirela. The family consists of more than a thousand members and may be further divided into 8 different parts.[5]^: 23

It orbits the Sun in the outer asteroid belt at a distance of 2.6–3.6 AU once every 5 years and 6 months (2,009 days; semi-major axis of 3.12 AU). Its orbit has an eccentricity of 0.16 and an inclination of 18° with respect to the ecliptic.[1] The body's observation arc begins with its official discovery observation as 2008 QZ₄₁ at Pises in August 2008.[4]

Physical characteristics

Based on a generic magnitude-to-diameter conversion, 2011 DY₅ measures 3.2 kilometers in diameter for an absolute magnitude of 16.0 and an assumed albedo of 0.07,[3] which is a typical value for a Tirela asteroid.[5]^: 23 As of 2018, no rotational lightcurve has been obtained from photometric observations. The asteroid's rotation period, poles and shape remain unknown.[1]

Numbering and naming

This minor planet was numbered by the Minor Planet Center on 21 August 2013 (M.P.C. 84643).[6] As of 2018, it has not been named.[4]

References

External links

• Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
• Asteroid families classification: exploiting very large data sets, Milani et al. (2014)
• Discovery Circumstances: Numbered Minor Planets (365001)-(370000) – Minor Planet Center
• (369623) 2011 DY5 at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

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