4962 Vecherka

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4962 Vecherka
Discovery  [1]
Discovered by T. Smirnova
Discovery site Crimean Astrophysical Obs.
Discovery date1 October 1973
Designations
(4962) Vecherka
Named after
Vechernij Petersburg  [2]
(Russian newspaper)
1973 TP ·1952 TF
1969 TM6 ·1973 UG3
1986 WC3
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
2.6061 AU
Eccentricity 0.1457
4.21 yr (1,537 days)
170.48°
0° 14m 3.48s / day
Inclination 15.108°
207.02°
141.66°
Physical characteristics
Dimensions8.54±0.59 km [5]
9.62±2.43 km [6]
9.951±0.201 km [7] [8]
10.06 km (calculated) [9]
336±48 h [10]
0.21 (assumed) [9]
0.210±0.038 [7]
0.21±0.11 [6]
0.2102±0.0377 [8]
0.349±0.170 [5]
S (assumed) [9]
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]

    Contents

    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]

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    References

    1. 1 2 3 4 "JPL Small-Body Database Browser: 4962 Vecherka (1973 TP)" (2017-05-23 last obs.). Jet Propulsion Laboratory . Retrieved 21 September 2017.
    2. 1 2 3 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.
    3. 1 2 "Asteroid 4962 Vecherka – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 29 October 2019.
    4. 1 2 "Small Bodies Data Ferret". Nesvorny HCM Asteroid Families V3.0. Archived from the original on 2 August 2017. Retrieved 21 September 2017.
    5. 1 2 3 4 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.
    6. 1 2 3 4 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 .
    7. 1 2 3 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.
    8. 1 2 3 4 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.
    9. 1 2 3 4 5 6 "LCDB Data for (4962) Vecherka". Asteroid Lightcurve Database (LCDB). Retrieved 21 September 2017.
    10. 1 2 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.
    11. ↑ 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.
    12. 1 2 "4962 Vecherka (1973 TP)". Minor Planet Center. Retrieved 21 September 2017.
    13. ↑ 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.
    14. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 21 September 2017.
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