3963 Paradzhanov

3963 Paradzhanov, provisional designation 1969 TP₂, is a Nysian asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter. It was discovered on 8 October 1969, by astronomer Lyudmila Chernykh at the Crimean Astrophysical Observatory in Nauchnyj, on the Crimean peninsula.^[5] The asteroid was named after Soviet film director Sergei Parajanov (Sargis Paradzhanov) in 1996.^[2]

3963 Paradzhanov

Discovery[1]
Discovered by	L. Chernykh
Discovery site	Crimean Astrophysical Obs.
Discovery date	8 October 1969
Designations
MPC designation	(3963) Paradzhanov
Named after	Sergei Parajanov (Soviet film director)[2]
Alternative designations	1969 TP2 · 1979 HS3 1984 QR1
Minor planet category	main-belt · (inner) Nysa[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc	47.56 yr (17,373 days)
Aphelion	2.9198 AU
Perihelion	1.9608 AU
Semi-major axis	2.4403 AU
Eccentricity	0.1965
Orbital period (sidereal)	3.81 yr (1,392 days)
Mean anomaly	197.62°
Mean motion	0° 15m 30.6s / day
Inclination	3.2758°
Longitude of ascending node	109.71°
Argument of perihelion	285.99°
Physical characteristics
Dimensions	5.779±0.375 km[4]
Geometric albedo	0.192±0.023[4]
Absolute magnitude (H)	13.5[1]

Orbit and classification

Paradzhanov is a member of the Nysa family (405),^[3] the asteroid belt's largest asteroid family. The low-inclination family is located in the inner main-belt and named after 44 Nysa. It is better described as the "Nysa-Polana complex" because it consists of two albedo-groups and at least three collisional families: Nysa, Polana, Eulalia, named after 142 Polana and 495 Eulalia. These are difficult to distinguish as they are dynamically overlapping with different but varying albedos.^[6][7]: 23 Paradzhanov has a relatively high albedo (see below) which places it into the stony Nysian subgroup of the "Nysa-Polana complex".

It orbits the Sun at a distance of 2.0–2.9 AU once every 3 years and 10 months (1,392 days). Its orbit has an eccentricity of 0.20 and an inclination of 3° with respect to the ecliptic.^[1] The body's observation arc begins with its identification as 1979 HS₃ at the discovering observatory in Nauchnyj in March 1979, almost 10 years after its official discovery observation.^[5]

Physical characteristics

Rotation period

As of 2017, no rotational lightcurve of Paradzhanov has been obtained from photometric observations. The asteroid's rotation period, poles and shape remain unknown.^[1][8]

Diameter and albedo

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Paradzhanov measures 5.779 kilometers in diameter and its surface has an albedo of 0.192.^[4]

Naming

This minor planet was named in memory of Georgian–Soviet film director Sergei Parajanov (1924–1990) (Sargis Paradzhanov). In 1965, he became internationally acknowledged with his feature film Shadows of Forgotten Ancestors, but also a target of the Soviet regime. The official naming citation was published by the Minor Planet Center on 3 May 1996 (M.P.C. 27126).^[9]