3137 Horky

3137 Horky

Discovery [1]
Discovered by	A. Mrkos
Discovery site	Kleť Obs.
Discovery date	16 September 1982
Designations
MPC designation	(3137) Horky
Named after	Horky [1] (Czech hill and village)
Alternative designations	1982 SM1 · 1971 UC2 1976 AC
Minor planet category	main-belt [1][2] · (inner) background [3]
Orbital characteristics [2]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc	68.17 yr (24,900 d)
Aphelion	2.8571 AU
Perihelion	1.9482 AU
Semi-major axis	2.4026 AU
Eccentricity	0.1892
Orbital period (sidereal)	3.72 yr (1,360 d)
Mean anomaly	143.98°
Mean motion	0° 15^m 52.92^s / day
Inclination	2.4738°
Longitude of ascending node	286.63°
Argument of perihelion	135.50°
Physical characteristics
Mean diameter	6.685±0.089 km[4]
Geometric albedo	0.207±0.030[4]
Spectral type	SMASS = C [2]
Absolute magnitude (H)	13.3[2]

3137 Horky, provisional designation 1982 SM₁, is a background asteroid from the inner regions of the asteroid belt, approximately 7 kilometers (4.3 miles) in diameter. It was discovered on 16 September 1982, by Czech astronomer Antonín Mrkos at the Kleť Observatory in the Czech Republic. The likely stony asteroid was named for a hill near the Czech village of Horky.[1]

Orbit and classification

Orbital diagram of Horky

Horky is a non-family asteroid from the main belt's background population.[3] It orbits the Sun in the inner asteroid belt at a distance of 1.9–2.9 AU once every 3 years and 9 months (1,360 days; semi-major axis of 2.4 AU). Its orbit has an eccentricity of 0.19 and an inclination of 2° with respect to the ecliptic.[2]

The body's observation arc begins with a precovery taken at Palomar Observatory in November 1949, almost 33 years prior to its official discovery observation at Klet.[1]

Close approaches

On 1 May 2019, Horky will pass 15 Eunomia at a distance of 1,440,000 km (0.0096 AU). It is also projected to make close approaches to 29 Amphitrite, 7 Iris and 10 Hygiea.[2]

Physical characteristics

In the SMASS classification, Horky is a carbonaceous C-type asteroid.[2] However, based on the obtained albedo by the Wide-field Infrared Survey Explorer (WISE), it is rather a stony S-type (see below). As of 2018, no rotational lightcurve of this asteroid has been obtained from photometric observations. The body's rotation period, pole and shape remain unknown.[2]

Diameter and albedo

According to the survey carried out by the NEOWISE mission of NASA's WISE telescope, Horky measures 6.685 kilometers in diameter and its surface has an albedo of 0.207,[4] which indicates that is likely of a stony rather than carbonaceous composition. It has an absolute magnitude of 13.3.[2]

Naming

This minor planet was named after a hill and its nearby village Horky in the Czech Republic, where the discoverer installed his first telescope in 1939.[1] The official naming citation was published by the Minor Planet Center on 29 November 1993 (M.P.C. 22828).[5]

References

1. "3137 Horky (1982 SM1)". Minor Planet Center. Retrieved 27 April 2018.
2. "JPL Small-Body Database Browser: 3137 Horky (1982 SM1)" (2018-01-27 last obs.). Jet Propulsion Laboratory. Retrieved 27 April 2018.
3. "Asteroid 3137 Horky – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 29 October 2019.
4. Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J.; et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal. 741 (2): 20. arXiv:1109.4096. Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68. Retrieved 27 April 2018.
5. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 27 April 2018.

External links

• Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
• Dictionary of Minor Planet Names, Google books
• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
• 3137 Horky at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 3137 Horky at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters