1709 Ukraina

1709 Ukraina, provisional designation 1925 QA, is a stony asteroid from the inner regions of the asteroid belt, approximately 9 kilometers in diameter. It was discovered on 16 August 1925, by Soviet astronomer Grigory Shajn at Simeiz Observatory on the Crimean peninsula.^[10] It was named in honor of Ukraine.^[2]

1709 Ukraina

Lightcurve-based 3D-model of Ukraina
Discovery[1]
Discovered by	G. Shajn
Discovery site	Simeiz Obs.
Discovery date	16 August 1925
Designations
MPC designation	(1709) Ukraina
Named after	Ukraine (former Soviet state)[2]
Alternative designations	1925 QA · 1936 QH
Minor planet category	main-belt · (inner)[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc	91.69 yr (33,488 days)
Aphelion	2.8870 AU
Perihelion	1.8702 AU
Semi-major axis	2.3786 AU
Eccentricity	0.2137
Orbital period (sidereal)	3.67 yr (1,340 days)
Mean anomaly	22.534°
Mean motion	0° 16m 7.32s / day
Inclination	7.5550°
Longitude of ascending node	300.07°
Argument of perihelion	42.615°
Physical characteristics
Dimensions	8.15 km (derived)[3] 9.444±1.398 km[4] 10.79±0.22 km[5]
Synodic rotation period	7.28 h[6] 7.300±0.003 h[7] 7.30517±0.00005 h[8]
Geometric albedo	0.123±0.006[5] 0.196±0.033[4] 0.20 (assumed)[3]
Spectral type	S[3][6][9] B–V = 0.990[1]
Absolute magnitude (H)	12.51[4] · 12.62±0.64[9] · 12.75[1][5] · 12.81[3][6]

Orbit and classification

Ukraina orbits the Sun in the inner main-belt at a distance of 1.9–2.9 AU once every 3 years and 8 months (1,340 days). Its orbit has an eccentricity of 0.21 and an inclination of 8° with respect to the ecliptic.^[1]

The body's observation arc begins at Heidelberg, five days after its official discovery observation at Simeiz.^[10]

Physical characteristics

The S-type asteroid has an albedo of about 0.2^[4] and a rotation period of 7.3 hours.^[7][8]

Naming

This minor planet was named after the country Ukraine, then the Ukrainian Soviet Socialist Republic (1922–1991). The name was proposed by the Institute of Theoretical Astronomy in Leningrad, what is now St. Petersburg.^[2] The official naming citation was published by the Minor Planet Center on 1 June 1967 (M.P.C. 2740).^[11]