1600 Vyssotsky

1600 Vyssotsky

Shape model of Vyssotsky from its lightcurve
Discovery[1]
Discovered by	C. A. Wirtanen
Discovery site	Lick Obs.
Discovery date	22 October 1947
Designations
MPC designation	(1600) Vyssotsky
Named after	Alexander Vyssotsky (astronomer)[2]
Alternative designations	1947 UC
Minor planet category	main-belt · Hungaria[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc	69.62 yr (25,427 days)
|{{{apsis}}}|helion}}	1.9183 AU
|{{{apsis}}}|helion}}	1.7793 AU
Semi-major axis	1.8488 AU
Eccentricity	0.0376
Orbital period	2.51 yr (918 days)
Mean anomaly	199.42°
Mean motion	0° 23m 31.56s / day
Inclination	21.173°
Longitude of ascending node	60.602°
|{{{apsis}}}|helion}}	50.543°
Physical characteristics
Dimensions	6.29±0.89 km[4] 7.00 km (calculated)[3] 7.41±0.06 km[5] 7.413±0.057 km 7.50±0.50 km[6]
Rotation period	3.2±0.01 h[7] 3.201±0.001 h[8][9][10] 3.201±0.005 h[11] 3.2011±0.0004 h[12] 3.20116±0.00004 h[13] 3.20124±0.00004 h[14] 3.201264±0.00001 h[15] 3.20144±0.00002 h[14] 3.204±0.003 h[16] 3.205±0.003 h[17] 3.205±0.005 h[18]
Geometric albedo	0.3 (assumed)[3] 0.321±0.059[5] 0.46±0.23[4] 0.506±0.187[19] 0.547±0.076[6]
Spectral type	SMASS = A[1] · A[3]
Absolute magnitude (H)	11.90[6] · 12.50[4][5] · 12.7[1][3]

1600 Vyssotsky, provisional designation 1947 UC, is a rare-type Hungaria asteroid and suspected interloper from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered on 22 October 1947, by American astronomer Carl Wirtanen at Lick Observatory in California, United States.^[20] It was named after astronomer Alexander Vyssotsky.^[2]

Classification and orbit

Vyssotsky is a rare A-type asteroid. Based on its orbital characteristics, it is member of the Hungaria family, that form the last, innermost dense concentration of asteroids in the Solar System. However, due to its rare type, it is a suspected interloper, as Hungarias typically show a different E-type spectra.^[17] It orbits the Sun in the inner main-belt at a distance of 1.8–1.9 AU once every 2 years and 6 months (918 days). Its orbit has an eccentricity of 0.04 and an inclination of 21° with respect to the ecliptic.^[1] Vyssotsky's observation arc begins with its official discovery observation, as no precoveries were taken, and no prior identifications were made.^[20]

Lightcurves

Between 1999 and 2014, several rotational lightcurves of Vyssotsky were obtained by American astronomer Brian D. Warner at his Palmer Divide Observatory, Colorado (see video in § External links). Light-curve analysis gave a concurring rotation period of 3.201 hours with an averaged brightness variation of 0.18 magnitude ({{{1}}}).^{[7][9][10][12][15][17]}

Additional well-defined lightcurves were obtained by astronomers Domenico Licchelli in November 2005 ({{{1}}}),^[8] Raymond Poncy, Raoul Behrend, René Roy, Reiner Stoss, Jaime Nomen, Salvador Sanchez also in November 2005 ({{{1}}}),^[14] David Higgins in May 2007 ({{{1}}}),^[13] Michael Lucas in November 2010 ({{{1}}}),^[11] as well as by Hiromi Hamanowa and Hiroko Hamanowa also in November 2010 ({{{1}}}).^[14] The most recent photometric observation was made by Robert D. Stephens in September 2015, giving a period of 3.204 hours with an amplitude of 0.24 magnitude ({{{1}}}).^[16] In spite of its many observations, Vyssotsky's spin axis and spin direction can not be determined with certainty.^[17]

Diameter and albedo

According to the surveys carried out by the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Vyssotsky measures between 6.29 and 7.50 kilometers in diameter and its surface has an albedo between 0.321 and 0.547.^{[4][6][5][19]} The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.3 and calculates a diameter of 7.00 kilometers with an absolute magnitude of 12.7.^[3]

Naming

This minor planet was named in honor of Russian–American astronomer Alexander Vyssotsky (1888–1973), who joined the faculty of the University of Virginia in 1923 and stayed at the McCormick Observatory on Mount Jefferson, Virginia, for 35 years. He was active in the fields of photometry, astrometry and spectral classification.^[2] The official naming citation was published by the Minor Planet Center on 20 February 1976 (M.P.C. 3931).^[21]

References

External links

• The Palmer Divide Observatory: Tour given by Brian Warner on YouTube (time 4:03 min.)
• Lightcurve plot of 1600 Vyssotsky, Palmer Divide Observatory, B. D. Warner (2009)
• Asteroid Lightcurve Database (LCDB), query form (info )
• Dictionary of Minor Planet Names, Google books
• Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
• 1600 Vyssotsky at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 1600 Vyssotsky at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

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