2123 Vltava

2123 Vltava
Discovery [1]
Discovered by N. Chernykh
Discovery site CrAO – Nauchnyj
Discovery date 22 September 1973
Designations
MPC designation 2123 Vltava
Named after
 Vltava (river)[2]
1973 SL2 · 1934 PB
1936 AE · 1942 EV
1951 AQ1 · 1954 UL
1956 AJ · 1956 CE
1964 VZ · 1975 AR
1977 JB1 · 1978 SO
main-belt · Koronis [3]
Orbital characteristics [1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 81.68 yr (29,835 days)     
Aphelion 3.0848 AU
Perihelion 2.6335 AU
2.8592 AU
Eccentricity 0.0789
4.83 yr (1,766 days)
290.17°
0° 12m 14.04s / day
Inclination 1.0110°
311.63°
59.009°
Physical characteristics
Dimensions 14.42±1.3 km (IRAS:2)[3]
14.800±0.252 km[4]
15.12±0.75 km[5]
16.2954±0.0282 h[6]
34.0 h[7]
0.2032±0.0183[4]
0.2135±0.046 (IRAS:2)[3]
0.220±0.025[5]
S [3]
11.327±0.001 (R)[6]
11.50 (IRAS:2)[1][3]
11.5[5][4]
11.75±0.09[7]
12.09±0.50[8]

    2123 Vltava, provisional designation 1973 SL2, is a stony Koronis asteroid from the outer region of the asteroid belt, approximately 15 kilometers in diameter. It was discovered on 22 September 1973, by Soviet–Russian astronomer Nikolai Chernykh at the Crimean Astrophysical Observatory on the Crimean peninsula in Nauchnyj.[9]

    The S-type asteroid is a member of the Koronis family, which is named after 158 Koronis and consists of about 300 known bodies with nearly co-planar ecliptical orbits. The asteroid orbits the Sun at a distance of 2.6–3.1 AU once every 4 years and 10 months (1,766 days). Its orbit has an eccentricity of 0.08 and an inclination of 1° with respect to the plane of the ecliptic.[1] Due to a precovery taken at Heidelberg Observatory in 1934, the asteroid's observation arc is extended by 39 years prior to its discovery.[9]

    Between 1998 and 2005, a survey by seven different observatories obtained a large number of rotational light-curves from members of the Koronis family. For this asteroid, the survey gave an ambiguous rotation period of 34.0 hours with a brightness amplitude of 0.21 in magnitude (U=2).[7] In 2014, photometric observations at the U.S. Palomar Transient Factory rendered a light-curve with an alternative solution of 16.2954±0.0282 hours, or about half the period previously found, with an amplitude of 0.19 (U=2).[6]

    According to the surveys carried out by the international Infrared Astronomical Satellite (IRAS), the Japanese Akari satellite, and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, the asteroid measures between 14.4 and 15.1 kilometers in diameter and its surface has an albedo between 0.20 and 0.22.[1][5][4]

    The minor planet was named for the Vltava (Moldau), the longest river within the Czech Republic, running through the city of Prague.[2] Naming citation was published on 1 April 1980 (M.P.C. 5283).[10]

    References

    1. 1 2 3 4 5 "JPL Small-Body Database Browser: 2123 Vltava (1973 SL2)" (2016-04-16 last obs.). Jet Propulsion Laboratory. Retrieved 17 May 2016.
    2. 1 2 Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (2123) Vltava. Springer Berlin Heidelberg. p. 172. ISBN 978-3-540-00238-3. Retrieved 14 April 2016.
    3. 1 2 3 4 5 "LCDB Data for (2123) Vltava". Asteroid Lightcurve Database (LCDB). Retrieved 17 May 2016.
    4. 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:1109.6407Freely accessible. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 17 May 2016.
    5. 1 2 3 4 Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved 17 May 2016.
    6. 1 2 3 Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David; et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal. 150 (3): 35. arXiv:1504.04041Freely accessible. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 17 May 2016.
    7. 1 2 3 Slivan, Stephen M.; Binzel, Richard P.; Boroumand, Shaida C.; Pan, Margaret W.; Simpson, Christine M.; Tanabe, James T.; et al. (May 2008). "Rotation rates in the Koronis family, complete to H≈11.2". Icarus. 195 (1): 226–276. Bibcode:2008Icar..195..226S. doi:10.1016/j.icarus.2007.11.019. Retrieved 17 May 2016.
    8. ↑ 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:1506.00762Freely accessible. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 17 May 2016.
    9. 1 2 "2123 Vltava (1973 SL2)". Minor Planet Center. Retrieved 14 April 2016.
    10. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 17 May 2016.

    External links

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