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4962 Vecherka - Wikipedia

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4962 Vecherka
Discovery ^[1]
Discovered by	T. Smirnova
Discovery site	Crimean Astrophysical Obs.
Discovery date	1 October 1973
Designations
MPC designation	(4962) Vecherka
Named after	Vechernij Petersburg ^[2] (Russian newspaper)
Alternative designations	1973 TP · 1952 TF 1969 TM₆ · 1973 UG₃ 1986 WC₃
Minor planet category	main-belt · (middle) Maria ^[3] · background ^[4]
Orbital characteristics ^[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc	64.61 yr (23,600 days)
Aphelion	2.9857 AU
Perihelion	2.2265 AU
Semi-major axis	2.6061 AU
Eccentricity	0.1457
Orbital period (sidereal)	4.21 yr (1,537 days)
Mean anomaly	170.48°
Mean motion	0° 14^m 3.48^s / day
Inclination	15.108°
Longitude of ascending node	207.02°
Argument of perihelion	141.66°
Physical characteristics
Dimensions	8.54±0.59 km^[5] 9.62±2.43 km^[6] 9.951±0.201 km^[7]^[8] 10.06 km (calculated)^[9]
Synodic rotation period	336±48 h^[10]
Geometric albedo	0.21 (assumed)^[9] 0.210±0.038^[7] 0.21±0.11^[6] 0.2102±0.0377^[8] 0.349±0.170^[5]
Spectral type	S (assumed)^[9]
Absolute magnitude (H)	11.94±0.27^[11] · 12.10^[5]^[8] · 12.3^[1]^[9] · 12.67^[6]

4962 Vecherka, provisional designation 1973 TP, is a Eunomian asteroid and slow rotator from the central regions of the asteroid belt, approximately 10 kilometers in diameter. It was discovered on 1 October 1973, by Soviet astronomer Tamara Smirnova at the Crimean Astrophysical Observatory in Nauchnij, on the Crimean peninsula.^[12] The asteroid was named after Vechernij Petersburg, a newspaper that also publishes astronomical information.^[2]

Orbit and classification

When applying the hierarchical clustering method to its proper orbital elements, Vecherka has both been considered a non-family asteroid of the main belt's background population (according to Nesvorný),^[4] and core member of the Maria family (according to Milani and Knežević).^[3]

It orbits the Sun in the central asteroid belt at a distance of 2.2–3.0 AU once every 4 years and 3 months (1,537 days). Its orbit has an eccentricity of 0.15 and an inclination of 15° with respect to the ecliptic.^[1] The body's observation arc begins with its first observation as 1952 TF at Uccle Observatory in October 1952, or 21 years prior to its official discovery observation at Nauchnij.^[12]

Physical characteristics

Vecherka is an assumed stony S-type asteroid,^[9] which corresponds to the overall spectral type of the Maria family.^[13]^: 23

Slow rotator

In August 2015, a rotational lightcurve of Vecherka was obtained from photometric observations by a collaboration of Bulgarian astronomers. Lightcurve analysis gave a long rotation period of 336±48 hours with a brightness variation of 1.08 magnitude (U=2), indicating that the body's shape is irregular and elongated rather than spherical.^[10] This long period makes Vecherka a slow rotator, which ranks among the Top 200 slowest ones known to exists.

Diameter and albedo

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Vecherka measures between 8.54 and 9.951 kilometers in diameter and its surface has an albedo between 0.210 and 0.349.^[5]^[6]^[7]^[8]

The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.21 – derived from 15 Eunomia, the family's largest member and namesake – and calculates a diameter of 10.06 kilometers based on an absolute magnitude of 12.3.^[9]

Naming

Based on a proposal by the Institute of Theoretical Astronomy (ITA), this minor planet was named after Vechernij Petersburg, a popular evening newspaper from Saint Petersburg, Russia, that publishes astronomical information and articles popularizing astronomical knowledge on a regular basis.^[2] The official naming citation was published by the Minor Planet Center on 14 December 1997 (M.P.C. 31023).^[14]

References

^ ^a ^b ^c ^d "JPL Small-Body Database Browser: 4962 Vecherka (1973 TP)" (2017-05-23 last obs.). Jet Propulsion Laboratory. Retrieved 21 September 2017.
^ ^a ^b ^c Schmadel, Lutz D. (2007). "(4962) Vecherka". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 427. doi:10.1007/978-3-540-29925-7_4840. ISBN 978-3-540-00238-3.
^ ^a ^b "Asteroid 4962 Vecherka – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 29 October 2019.
^ ^a ^b "Small Bodies Data Ferret". Nesvorny HCM Asteroid Families V3.0. Archived from the original on 2 August 2017. Retrieved 21 September 2017.
^ ^a ^b ^c ^d Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters. 759 (1): 5. arXiv:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8.
^ ^a ^b ^c ^d Nugent, C. R.; Mainzer, A.; Bauer, J.; Cutri, R. M.; Kramer, E. A.; Grav, T.; et al. (September 2016). "NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos". The Astronomical Journal. 152 (3): 12. arXiv:1606.08923. Bibcode:2016AJ....152...63N. doi:10.3847/0004-6256/152/3/63.
^ ^a ^b ^c 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.
^ ^a ^b ^c ^d Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90.
^ ^a ^b ^c ^d ^e ^f "LCDB Data for (4962) Vecherka". Asteroid Lightcurve Database (LCDB). Retrieved 21 September 2017.
^ ^a ^b Tomov, Dimitar; Kurtenkov, Alexander; Enimanev, Mihail; Teneva, Deana (October 2016). "Asteroid 4962 Vecherka: A High-Amplitude Slow Rotator". The Minor Planet Bulletin. 43 (4): 321–322. Bibcode:2016MPBu...43..321T. ISSN 1052-8091.
^ Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 – Preliminary results". Icarus. 261: 34–47. arXiv:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007.
^ ^a ^b "4962 Vecherka (1973 TP)". Minor Planet Center. Retrieved 21 September 2017.
^ Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). "Identification and Dynamical Properties of Asteroid Families". Asteroids IV. pp. 297–321. arXiv:1502.01628. Bibcode:2015aste.book..297N. doi:10.2458/azu_uapress_9780816532131-ch016. ISBN 978-0-8165-3213-1.
^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 21 September 2017.

External links

Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
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
4962 Vecherka at AstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
4962 Vecherka at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters

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